fix: support export maps for match-* analyzers

.changeset/afraid-peaches-type.md

@@ -0,0 +1,5 @@
+---
+'providence-analytics': patch
+---
+
+Support export maps for match-\* analyzers

packages-node/providence-analytics/package.json

@@ -35,7 +35,7 @@
     "@babel/register": "^7.5.5",
     "@babel/traverse": "^7.5.5",
     "@babel/types": "^7.9.0",
-    "@rollup/plugin-node-resolve": "^7.1.1",
+    "@rollup/plugin-node-resolve": "^13.0.6",
     "@typescript-eslint/typescript-estree": "^3.0.0",
     "anymatch": "^3.1.1",
     "chalk": "^4.1.0",
@@ -48,6 +48,7 @@
     "inquirer": "^7.0.0",
     "is-negated-glob": "^1.0.0",
     "lit-element": "~2.4.0",
+    "mock-require": "^3.0.3",
     "ora": "^3.4.0",
     "parse5": "^5.1.1",
     "read-package-tree": "5.3.1",

packages-node/providence-analytics/src/program/analyzers/helpers/from-import-to-export-perspective.js

@@ -1,79 +1,51 @@
-const fs = require('fs');
-const pathLib = require('path');
 const { isRelativeSourcePath } = require('../../utils/relative-source-path.js');
 const { LogService } = require('../../services/LogService.js');
+const { resolveImportPath } = require('../../utils/resolve-import-path.js');
 
 /**
- * TODO: Use utils/resolve-import-path for  100% accuracy
+ * @param {string} importee like '@lion/core/myFile.js'
- *
+ * @returns {string} project name ('@lion/core')
- * - from: 'reference-project/foo.js'
- * - to: './foo.js'
- * When we need to resolve to the main entry:
- * - from: 'reference-project'
- * - to: './index.js' (or other file specified in package.json 'main')
- * @param {object} config
- * @param {string} config.requestedExternalSource
- * @param {{name, mainEntry}} config.externalProjectMeta
- * @param {string} config.externalRootPath
- * @returns {string|null}
  */
-function fromImportToExportPerspective({
+function getProjectFromImportee(importee) {
-  requestedExternalSource,
+  const scopedProject = importee[0] === '@';
-  externalProjectMeta,
-  externalRootPath,
-}) {
-  if (isRelativeSourcePath(requestedExternalSource)) {
-    LogService.warn('[fromImportToExportPerspective] Please only provide external import paths');
-    return null;
-  }
-
-  const scopedProject = requestedExternalSource[0] === '@';
   // 'external-project/src/file.js' -> ['external-project', 'src', file.js']
-  let splitSource = requestedExternalSource.split('/');
+  let splitSource = importee.split('/');
   if (scopedProject) {
     // '@external/project'
     splitSource = [splitSource.slice(0, 2).join('/'), ...splitSource.slice(2)];
   }
   // ['external-project', 'src', 'file.js'] -> 'external-project'
   const project = splitSource.slice(0, 1).join('/');
-  // ['external-project', 'src', 'file.js'] -> 'src/file.js'
-  const localPath = splitSource.slice(1).join('/');
 
-  if (externalProjectMeta.name !== project) {
+  return project;
+}
+
+/**
+ * Gets local path from reference project
+ *
+ * - from: 'reference-project/foo'
+ * - to: './foo.js'
+ * When we need to resolve to the main entry:
+ * - from: 'reference-project'
+ * - to: './index.js' (or other file specified in package.json 'main')
+ * @param {object} config
+ * @param {string} config.importee 'reference-project/foo.js'
+ * @param {string} config.importer '/my/project/importing-file.js'
+ * @returns {Promise<string|null>} './foo.js'
+ */
+async function fromImportToExportPerspective({ importee, importer }) {
+  if (isRelativeSourcePath(importee)) {
+    LogService.warn('[fromImportToExportPerspective] Please only provide external import paths');
     return null;
   }
 
-  if (localPath) {
+  const absolutePath = await resolveImportPath(importee, importer);
-    // like '@open-wc/x/y.js'
+  const projectName = getProjectFromImportee(importee);
-    // Now, we need to resolve to a file or path. Even though a path can contain '.',
-    // we still need to check if we're not dealing with a folder.
-    // - '@open-wc/x/y.js' -> '@open-wc/x/y.js' or... '@open-wc/x/y.js/index.js' ?
-    // - or 'lion-based-ui/test' -> 'lion-based-ui/test/index.js' or 'lion-based-ui/test' ?
-    if (externalRootPath) {
-      const pathToCheck = pathLib.resolve(externalRootPath, `./${localPath}`);
 
-      if (fs.existsSync(pathToCheck)) {
+  // from /my/reference/project/packages/foo/index.js to './packages/foo/index.js'
-        const stat = fs.statSync(pathToCheck);
+  return absolutePath
-        if (stat && stat.isFile()) {
+    ? absolutePath.replace(new RegExp(`^.*/${projectName}/?(.*)$`), './$1')
-          return `./${localPath}`; // '/path/to/lion-based-ui/fol.der' is a file
+    : null;
-        }
-        return `./${localPath}/index.js`; // '/path/to/lion-based-ui/fol.der' is a folder
-        // eslint-disable-next-line no-else-return
-      } else if (fs.existsSync(`${pathToCheck}.js`)) {
-        return `./${localPath}.js`; // '/path/to/lion-based-ui/fol.der' is file '/path/to/lion-based-ui/fol.der.js'
-      }
-    } else {
-      return `./${localPath}`;
-    }
-  } else {
-    // like '@lion/core'
-    let mainEntry = externalProjectMeta.mainEntry || 'index.js';
-    if (!mainEntry.startsWith('./')) {
-      mainEntry = `./${mainEntry}`;
-    }
-    return mainEntry;
-  }
-  return null;
 }
 
 module.exports = { fromImportToExportPerspective };

packages-node/providence-analytics/src/program/analyzers/match-imports.js

@@ -1,3 +1,5 @@
+/* eslint-disable no-continue */
+const pathLib = require('path');
 /* eslint-disable no-shadow, no-param-reassign */
 const FindImportsAnalyzer = require('./find-imports.js');
 const FindExportsAnalyzer = require('./find-exports.js');
@@ -5,19 +7,13 @@ const { Analyzer } = require('./helpers/Analyzer.js');
 const { fromImportToExportPerspective } = require('./helpers/from-import-to-export-perspective.js');
 
 /**
- * @desc Helper method for matchImportsPostprocess. Modifies its resultsObj
+ * @typedef {import('../types/find-imports').FindImportsAnalyzerResult} FindImportsAnalyzerResult
- * @param {object} resultsObj
+ * @typedef {import('../types/find-exports').FindExportsAnalyzerResult} FindExportsAnalyzerResult
- * @param {string} exportId like 'myExport::./reference-project/my/export.js::my-project'
+ * @typedef {import('../types/find-exports').IterableFindExportsAnalyzerEntry} IterableFindExportsAnalyzerEntry
- * @param {Set<string>} filteredList
+ * @typedef {import('../types/find-imports').IterableFindImportsAnalyzerEntry} IterableFindImportsAnalyzerEntry
+ * @typedef {import('../types/match-imports').ConciseMatchImportsAnalyzerResult} ConciseMatchImportsAnalyzerResult
+ * @typedef {import('../types/core').PathRelativeFromRoot} PathRelativeFromRoot
  */
-function storeResult(resultsObj, exportId, filteredList, meta) {
-  if (!resultsObj[exportId]) {
-    // eslint-disable-next-line no-param-reassign
-    resultsObj[exportId] = { meta };
-  }
-  // eslint-disable-next-line no-param-reassign
-  resultsObj[exportId].files = [...(resultsObj[exportId].files || []), ...Array.from(filteredList)];
-}
 
 /**
  * Needed in case fromImportToExportPerspective does not have a
@@ -33,56 +29,168 @@ function compareImportAndExportPaths(exportPath, translatedImportPath) {
   );
 }
 
+/**
+ * Convert to more easily iterable object
+ *
+ * From:
+ * ```js
+ * [
+ *  "file": "./file-1.js",
+ *  "result": [{
+ *    "exportSpecifiers": [ "a", "b"],
+ *    "localMap": [{...},{...}],
+ *    "source": null,
+ *    "rootFileMap": [{"currentFileSpecifier": "a", "rootFile": { "file": "[current]", "specifier": "a" }}]
+ *  }, ...],
+ * ```
+ * To:
+ * ```js
+ * [{
+ *   "file": ""./file-1.js",
+ *   "exportSpecifier": "a",
+ *   "localMap": {...},
+ *   "source": null,
+ *   "rootFileMap": {...}
+ * },
+ * {{
+ *   "file": ""./file-1.js",
+ *   "exportSpecifier": "b",
+ *   "localMap": {...},
+ *   "source": null,
+ *   "rootFileMap": {...}
+ * }}],
+ *
+ * @param {FindExportsAnalyzerResult} exportsAnalyzerResult
+ */
+function transformIntoIterableFindExportsOutput(exportsAnalyzerResult) {
+  /** @type {IterableFindExportsAnalyzerEntry[]} */
+  const iterableEntries = [];
+
+  for (const { file, result } of exportsAnalyzerResult.queryOutput) {
+    for (const { exportSpecifiers, source, rootFileMap, localMap, meta } of result) {
+      if (!exportSpecifiers) {
+        break;
+      }
+      for (const exportSpecifier of exportSpecifiers) {
+        const i = exportSpecifiers.indexOf(exportSpecifier);
+        /** @type {IterableFindExportsAnalyzerEntry} */
+        const resultEntry = {
+          file,
+          specifier: exportSpecifier,
+          source,
+          rootFile: rootFileMap ? rootFileMap[i] : undefined,
+          localSpecifier: localMap ? localMap[i] : undefined,
+          meta,
+        };
+        iterableEntries.push(resultEntry);
+      }
+    }
+  }
+  return iterableEntries;
+}
+
+/**
+ * Convert to more easily iterable object
+ *
+ * From:
+ * ```js
+ * [
+ *  "file": "./file-1.js",
+ *  "result": [{
+ *    "importSpecifiers": [ "a", "b" ],
+ *    "source": "exporting-ref-project",
+ *    "normalizedSource": "exporting-ref-project"
+ * }], ,
+ * ```
+ * To:
+ * ```js
+ * [{
+ *   "file": ""./file-1.js",
+ *   "importSpecifier": "a",,
+ *   "source": "exporting-ref-project",
+ *   "normalizedSource": "exporting-ref-project"
+ * },
+ * {{
+ *   "file": ""./file-1.js",
+ *   "importSpecifier": "b",,
+ *   "source": "exporting-ref-project",
+ *   "normalizedSource": "exporting-ref-project"
+ * }}],
+ *
+ * @param {FindImportsAnalyzerResult} importsAnalyzerResult
+ */
+function transformIntoIterableFindImportsOutput(importsAnalyzerResult) {
+  /** @type {IterableFindImportsAnalyzerEntry[]} */
+  const iterableEntries = [];
+
+  for (const { file, result } of importsAnalyzerResult.queryOutput) {
+    for (const { importSpecifiers, source, normalizedSource } of result) {
+      if (!importSpecifiers) {
+        break;
+      }
+      for (const importSpecifier of importSpecifiers) {
+        /** @type {IterableFindImportsAnalyzerEntry} */
+        const resultEntry = {
+          file,
+          specifier: importSpecifier,
+          source,
+          normalizedSource,
+        };
+        iterableEntries.push(resultEntry);
+      }
+    }
+  }
+  return iterableEntries;
+}
+
+/**
+ * Makes a concise results array a 'compatible resultsArray' (compatible with dashbaord + tests + ...?)
+ * @param {object[]} conciseResultsArray
+ * @param {string} importProject
+ */
+function createCompatibleMatchImportsResult(conciseResultsArray, importProject) {
+  const compatibleResult = [];
+  for (const matchedExportEntry of conciseResultsArray) {
+    const [name, filePath, project] = matchedExportEntry.exportSpecifier.id.split('::');
+    const exportSpecifier = {
+      ...matchedExportEntry.exportSpecifier,
+      name,
+      filePath,
+      project,
+    };
+    compatibleResult.push({
+      exportSpecifier,
+      matchesPerProject: [{ project: importProject, files: matchedExportEntry.importProjectFiles }],
+    });
+  }
+  return compatibleResult;
+}
+
 /**
  * @param {FindExportsAnalyzerResult} exportsAnalyzerResult
  * @param {FindImportsAnalyzerResult} importsAnalyzerResult
  * @param {matchImportsConfig} customConfig
- * @returns {AnalyzerResult}
+ * @returns {Promise<AnalyzerResult>}
  */
-function matchImportsPostprocess(exportsAnalyzerResult, importsAnalyzerResult, customConfig) {
+async function matchImportsPostprocess(exportsAnalyzerResult, importsAnalyzerResult, customConfig) {
   const cfg = {
     ...customConfig,
   };
 
+  // TODO: What if this info is retrieved from cached importProject/target project?
+  const importProjectPath = cfg.targetProjectPath;
+
+  const iterableFindExportsOutput = transformIntoIterableFindExportsOutput(exportsAnalyzerResult);
+  const iterableFindImportsOutput = transformIntoIterableFindImportsOutput(importsAnalyzerResult);
+
+  /** @type {ConciseMatchImportsAnalyzerResult} */
+  const conciseResultsArray = [];
+
+  for (const exportEntry of iterableFindExportsOutput) {
+    for (const importEntry of iterableFindImportsOutput) {
       /**
-   * Step 1: a 'flat' data structure
+       * 1. Does target import ref specifier?
-   * @desc Create a key value storage map for exports/imports matches
+       *
-   * - key: `${exportSpecifier}::${normalizedSource}::${project}` from reference project
-   * - value: an array of import file matches like `${targetProject}::${normalizedSource}`
-   * @example
-   * {
-   *   'myExport::./reference-project/my/export.js::my-project' : {
-   *      meta: {...},
-   *      files: [
-   *        'target-project-a::./import/file.js',
-   *        'target-project-b::./another/import/file.js'
-   *      ],
-   *    ]}
-   * }
-   */
-  const resultsObj = {};
-
-  exportsAnalyzerResult.queryOutput.forEach(exportEntry => {
-    const exportsProjectObj = exportsAnalyzerResult.analyzerMeta.targetProject;
-
-    // Look for all specifiers that are exported, like [import {specifier} 'lion-based-ui/foo.js']
-    exportEntry.result.forEach(exportEntryResult => {
-      if (!exportEntryResult.exportSpecifiers) {
-        return;
-      }
-
-      exportEntryResult.exportSpecifiers.forEach(exportSpecifier => {
-        // Get all unique imports (name::source::project combinations) that match current exportSpecifier
-        const filteredImportsList = new Set();
-        const exportId = `${exportSpecifier}::${exportEntry.file}::${exportsProjectObj.name}`;
-
-        // eslint-disable-next-line no-shadow
-        // importsAnalyzerResult.queryOutput.forEach(({ entries, project }) => {
-        const importProject = importsAnalyzerResult.analyzerMeta.targetProject.name;
-        importsAnalyzerResult.queryOutput.forEach(({ result, file }) =>
-          result.forEach(importEntryResult => {
-            /**
-             * @example
        * Example context (read by 'find-imports'/'find-exports' analyzers)
        * - export (/folder/exporting-file.js):
        * `export const x = 'foo'`
@@ -91,108 +199,57 @@ function matchImportsPostprocess(exportsAnalyzerResult, importsAnalyzerResult, c
        * Example variables (extracted by 'find-imports'/'find-exports' analyzers)
        * - exportSpecifier: 'x'
        * - importSpecifiers: ['x', 'y']
+       * @type {boolean}
        */
       const hasExportSpecifierImported =
-              // ['x', 'y'].includes('x')
+        exportEntry.specifier === importEntry.specifier || importEntry.specifier === '[*]';
-              importEntryResult.importSpecifiers.includes(exportSpecifier) ||
-              importEntryResult.importSpecifiers.includes('[*]');
-
       if (!hasExportSpecifierImported) {
-              return;
+        continue;
       }
 
       /**
-             * @example
+       * 2. Are we from the same source?
+       * A.k.a. is source required by target the same as the one found in target.
+       * (we know the specifier name is tha same, now we need to check the file as well.)
+       *
+       * Example:
        * exportFile './foo.js'
        * => export const z = 'bar'
        * importFile 'importing-target-project/file.js'
        * => import { z } from '@reference/foo.js'
+       * @type {PathRelativeFromRoot}
        */
-            const fromImportToExport = fromImportToExportPerspective({
+      const fromImportToExport = await fromImportToExportPerspective({
-              requestedExternalSource: importEntryResult.normalizedSource,
+        importee: importEntry.normalizedSource,
-              externalProjectMeta: exportsProjectObj,
+        importer: pathLib.resolve(importProjectPath, importEntry.file),
-              externalRootPath: cfg.referenceProjectResult ? null : cfg.referenceProjectPath,
       });
-            const isFromSameSource = compareImportAndExportPaths(
+      const isFromSameSource = compareImportAndExportPaths(exportEntry.file, fromImportToExport);
-              exportEntry.file,
-              fromImportToExport,
-            );
-
       if (!isFromSameSource) {
-              return;
+        continue;
       }
 
-            // TODO: transitive deps recognition? Could also be distinct post processor
-
-            filteredImportsList.add(`${importProject}::${file}`);
-          }),
-        );
-        storeResult(resultsObj, exportId, filteredImportsList, exportEntry.meta);
-      });
-    });
-  });
-
       /**
-   * Step 2: a rich data structure
+       * 3. When above checks pass, we have a match.
-   * @desc Transform resultObj from step 1 into an array of objects
+       * Add it to the results array
-   * @example
-   * [{
-   *   exportSpecifier: {
-   *     // name under which it is registered in npm ("name" attr in package.json)
-   *     name: 'RefClass',
-   *     project: 'exporting-ref-project',
-   *     filePath: './ref-src/core.js',
-   *     id: 'RefClass::ref-src/core.js::exporting-ref-project',
-   *     meta: {...},
-   *
-   *     // most likely via post processor
-   *   },
-   *   // All the matched targets (files importing the specifier), ordered per project
-   *   matchesPerProject: [
-   *     {
-   *       project: 'importing-target-project',
-   *       files: [
-   *         './target-src/indirect-imports.js',
-   *         ...
-   *       ],
-   *     },
-   *     ...
-   *   ],
-   * }]
        */
-  const resultsArray = Object.entries(resultsObj)
+      const id = `${exportEntry.specifier}::${exportEntry.file}::${exportsAnalyzerResult.analyzerMeta.targetProject.name}`;
-    .map(([id, flatResult]) => {
+      const resultForCurrentExport = conciseResultsArray.find(entry => entry.id === id);
-      const [exportSpecifierName, filePath, project] = id.split('::');
+      if (resultForCurrentExport) {
-      const { meta } = flatResult;
+        resultForCurrentExport.importProjectFiles.push(importEntry.file);
-
+      } else {
-      const exportSpecifier = {
+        conciseResultsArray.push({
-        name: exportSpecifierName,
+          exportSpecifier: { id, ...(exportEntry.meta ? { meta: exportEntry.meta } : {}) },
-        project,
+          importProjectFiles: [importEntry.file],
-        filePath,
-        id,
-        ...(meta || {}),
-      };
-
-      const matchesPerProject = [];
-      flatResult.files.forEach(projectFile => {
-        // eslint-disable-next-line no-shadow
-        const [project, file] = projectFile.split('::');
-        let projectEntry = matchesPerProject.find(m => m.project === project);
-        if (!projectEntry) {
-          matchesPerProject.push({ project, files: [] });
-          projectEntry = matchesPerProject[matchesPerProject.length - 1];
-        }
-        projectEntry.files.push(file);
         });
+      }
+    }
+  }
 
-      return {
+  const importProject = importsAnalyzerResult.analyzerMeta.targetProject.name;
-        exportSpecifier,
+  return /** @type {AnalyzerResult} */ createCompatibleMatchImportsResult(
-        matchesPerProject,
+    conciseResultsArray,
-      };
+    importProject,
-    })
+  );
-    .filter(r => Object.keys(r.matchesPerProject).length);
-
-  return /** @type {AnalyzerResult} */ resultsArray;
 }
 
 class MatchImportsAnalyzer extends Analyzer {
@@ -236,6 +293,7 @@ class MatchImportsAnalyzer extends Analyzer {
      * Prepare
      */
     const analyzerResult = this._prepare(cfg);
+
     if (analyzerResult) {
       return analyzerResult;
     }
@@ -263,7 +321,11 @@ class MatchImportsAnalyzer extends Analyzer {
       });
     }
 
-    const queryOutput = matchImportsPostprocess(referenceProjectResult, targetProjectResult, cfg);
+    const queryOutput = await matchImportsPostprocess(
+      referenceProjectResult,
+      targetProjectResult,
+      cfg,
+    );
 
     /**
      * Finalize

packages-node/providence-analytics/src/program/analyzers/match-subclasses.js

@@ -1,3 +1,5 @@
+/* eslint-disable no-continue */
+const pathLib = require('path');
 /* eslint-disable no-shadow, no-param-reassign */
 const FindClassesAnalyzer = require('./find-classes.js');
 const FindExportsAnalyzer = require('./find-exports.js');
@@ -63,12 +65,13 @@ function storeResult(resultsObj, exportId, filteredList, meta) {
  * @param {MatchSubclassesConfig} customConfig
  * @returns {AnalyzerResult}
  */
-function matchSubclassesPostprocess(
+async function matchSubclassesPostprocess(
   exportsAnalyzerResult,
   targetClassesAnalyzerResult,
   refClassesAResult,
   customConfig,
 ) {
+  // eslint-disable-next-line no-unused-vars
   const cfg = {
     ...customConfig,
   };
@@ -91,17 +94,17 @@ function matchSubclassesPostprocess(
    */
   const resultsObj = {};
 
-  exportsAnalyzerResult.queryOutput.forEach(exportEntry => {
+  for (const exportEntry of exportsAnalyzerResult.queryOutput) {
     const exportsProjectObj = exportsAnalyzerResult.analyzerMeta.targetProject;
     const exportsProjectName = exportsProjectObj.name;
 
     // Look for all specifiers that are exported, like [import {specifier} 'lion-based-ui/foo.js']
-    exportEntry.result.forEach(exportEntryResult => {
+    for (const exportEntryResult of exportEntry.result) {
       if (!exportEntryResult.exportSpecifiers) {
-        return;
+        continue;
       }
 
-      exportEntryResult.exportSpecifiers.forEach(exportSpecifier => {
+      for (const exportSpecifier of exportEntryResult.exportSpecifiers) {
         // Get all unique imports (name::source::project combinations) that match current
         // exportSpecifier
         const filteredImportsList = new Set();
@@ -109,8 +112,13 @@ function matchSubclassesPostprocess(
 
         // eslint-disable-next-line no-shadow
         const importProject = targetClassesAnalyzerResult.analyzerMeta.targetProject.name;
-        targetClassesAnalyzerResult.queryOutput.forEach(({ result, file }) =>
+
-          result.forEach(classEntryResult => {
+        // TODO: What if this info is retrieved from cached importProject/target project?
+        const importProjectPath = cfg.targetProjectPath;
+        for (const { result, file } of targetClassesAnalyzerResult.queryOutput) {
+          // targetClassesAnalyzerResult.queryOutput.forEach(({ result, file }) =>
+          for (const classEntryResult of result) {
+            // result.forEach(classEntryResult => {
             /**
              * @example
              * Example context (read by 'find-classes'/'find-exports' analyzers)
@@ -133,7 +141,7 @@ function matchSubclassesPostprocess(
               );
 
             if (!classMatch) {
-              return;
+              continue;
             }
 
             /**
@@ -147,11 +155,10 @@ function matchSubclassesPostprocess(
              */
             const isFromSameSource =
               exportEntry.file ===
-              fromImportToExportPerspective({
+              (await fromImportToExportPerspective({
-                requestedExternalSource: classMatch.rootFile.file,
+                importee: classMatch.rootFile.file,
-                externalProjectMeta: exportsProjectObj,
+                importer: pathLib.resolve(importProjectPath, file),
-                externalRootPath: cfg.referenceProjectPath,
+              }));
-              });
 
             if (classMatch && isFromSameSource) {
               const memberOverrides = getMemberOverrides(
@@ -166,12 +173,12 @@ function matchSubclassesPostprocess(
                 memberOverrides,
               });
             }
-          }),
+          }
-        );
+        }
         storeResult(resultsObj, exportId, filteredImportsList, exportEntry.meta);
-      });
+      }
-    });
+    }
-  });
+  }
 
   /**
    * Step 2: a rich data structure
@@ -313,7 +320,7 @@ class MatchSubclassesAnalyzer extends Analyzer {
       skipCheckMatchCompatibility: cfg.skipCheckMatchCompatibility,
     });
 
-    const queryOutput = matchSubclassesPostprocess(
+    const queryOutput = await matchSubclassesPostprocess(
       exportsAnalyzerResult,
       targetClassesAnalyzerResult,
       refClassesAnalyzerResult,

packages-node/providence-analytics/src/program/utils/resolve-import-path.js

@@ -4,21 +4,21 @@
  */
 
 const pathLib = require('path');
-const nodeResolvePackageJson = require('@rollup/plugin-node-resolve/package.json');
+const { nodeResolve } = require('@rollup/plugin-node-resolve');
-const createRollupResolve = require('@rollup/plugin-node-resolve');
 const { LogService } = require('../services/LogService.js');
 
 const fakePluginContext = {
   meta: {
-    rollupVersion: nodeResolvePackageJson.peerDependencies.rollup,
+    rollupVersion: '^2.42.0', // nodeResolvePackageJson.peerDependencies.rollup,
   },
+  resolve: () => {},
   warn(...msg) {
     LogService.warn('[resolve-import-path]: ', ...msg);
   },
 };
 
 /**
- * @desc based on importee (in a statement "import {x} from '@lion/core'", "@lion/core" is an
+ * Based on importee (in a statement "import {x} from '@lion/core'", "@lion/core" is an
  * importee), which can be a bare module specifier, a filename without extension, or a folder
  * name without an extension.
  * @param {string} importee source like '@lion/core'
@@ -26,7 +26,7 @@ const fakePluginContext = {
  * @returns {string} the resolved file system path, like '/my/project/node_modules/@lion/core/index.js'
  */
 async function resolveImportPath(importee, importer, opts = {}) {
-  const rollupResolve = createRollupResolve({
+  const rollupResolve = nodeResolve({
     rootDir: pathLib.dirname(importer),
     // allow resolving polyfills for nodejs libs
     preferBuiltins: false,
@@ -38,7 +38,7 @@ async function resolveImportPath(importee, importer, opts = {}) {
     (opts && opts.customResolveOptions && opts.customResolveOptions.preserveSymlinks) || false;
   rollupResolve.buildStart.call(fakePluginContext, { preserveSymlinks });
 
-  const result = await rollupResolve.resolveId.call(fakePluginContext, importee, importer);
+  const result = await rollupResolve.resolveId.call(fakePluginContext, importee, importer, {});
   if (!result || !result.id) {
     // throw new Error(`importee ${importee} not found in filesystem.`);
     LogService.warn(`importee ${importee} not found in filesystem for importer '${importer}'.`);

packages-node/providence-analytics/test-helpers/mock-project-helpers.js

@@ -1,9 +1,27 @@
+const path = require('path');
 // eslint-disable-next-line import/no-extraneous-dependencies
 const mockFs = require('mock-fs');
-const path = require('path');
+const mockRequire = require('mock-require');
+
+function mock(obj) {
+  mockFs(obj);
+
+  Object.entries(obj).forEach(([key, value]) => {
+    if (key.endsWith('.json')) {
+      mockRequire(key, JSON.parse(value));
+    } else {
+      mockRequire(key, value);
+    }
+  });
+}
+
+mock.restore = () => {
+  mockFs.restore();
+  mockRequire.stopAll();
+};
 
 /**
- * @desc Makes sure that, whenever the main program (providence) calls
+ * Makes sure that, whenever the main program (providence) calls
  * "InputDataService.createDataObject", it gives back a mocked response.
  * @param {string[]|object} files all the code that will be run trhough AST
  * @param {object} [cfg]
@@ -13,7 +31,7 @@ const path = require('path');
  * paths match with the indexes of the files
  * @param {object} existingMock config for mock-fs, so the previous config is not overridden
  */
-function mockProject(files, cfg = {}, existingMock = {}) {
+function getMockObjectForProject(files, cfg = {}, existingMock = {}) {
   const projName = cfg.projectName || 'fictional-project';
   const projPath = cfg.projectPath || '/fictional/project';
 
@@ -50,17 +68,32 @@ function mockProject(files, cfg = {}, existingMock = {}) {
   }
 
   const totalMock = {
-    ...existingMock, // can only add to mock-fs, not expand existing config?
     ...optionalPackageJson,
+    ...existingMock, // can only add to mock-fs, not expand existing config?
     ...createFilesObjForFolder(files),
   };
-
-  mockFs(totalMock);
   return totalMock;
 }
 
+/**
+ * Makes sure that, whenever the main program (providence) calls
+ * "InputDataService.createDataObject", it gives back a mocked response.
+ * @param {string[]|object} files all the code that will be run trhough AST
+ * @param {object} [cfg]
+ * @param {string} [cfg.projectName='fictional-project']
+ * @param {string} [cfg.projectPath='/fictional/project']
+ * @param {string[]} [cfg.filePaths=`[/fictional/project/test-file-${i}.js]`] The indexes of the file
+ * paths match with the indexes of the files
+ * @param {object} existingMock config for mock-fs, so the previous config is not overridden
+ */
+function mockProject(files, cfg = {}, existingMock = {}) {
+  const obj = getMockObjectForProject(files, cfg, existingMock);
+  mockFs(obj);
+  return obj;
+}
+
 function restoreMockedProjects() {
-  mockFs.restore();
+  mock.restore();
 }
 
 function getEntry(queryResult, index = 0) {
@@ -71,6 +104,23 @@ function getEntries(queryResult) {
   return queryResult.queryOutput;
 }
 
+function createPackageJson({ filePaths, codeSnippets, projectName, refProjectName, refVersion }) {
+  const targetHasPackageJson = filePaths.includes('./package.json');
+  // Make target depend on ref
+  if (targetHasPackageJson) {
+    return;
+  }
+  const pkgJson = {
+    name: projectName,
+    version: '1.0.0',
+  };
+  if (refProjectName && refVersion) {
+    pkgJson.dependencies = { [refProjectName]: refVersion };
+  }
+  codeSnippets.push(JSON.stringify(pkgJson));
+  filePaths.push('./package.json');
+}
+
 /**
  * Requires two config objects (see match-imports and match-subclasses tests)
  * and based on those, will use mock-fs package to mock them in the file system.
@@ -86,22 +136,25 @@ function mockTargetAndReferenceProject(searchTargetProject, referenceProject) {
   const targetcodeSnippets = searchTargetProject.files.map(f => f.code);
   const targetFilePaths = searchTargetProject.files.map(f => f.file);
   const refVersion = referenceProject.version || '1.0.0';
+  const refcodeSnippets = referenceProject.files.map(f => f.code);
+  const refFilePaths = referenceProject.files.map(f => f.file);
 
-  const targetHasPackageJson = targetFilePaths.includes('./package.json');
+  createPackageJson({
-  // Make target depend on ref
+    filePaths: targetFilePaths,
-  if (!targetHasPackageJson) {
+    codeSnippets: targetcodeSnippets,
-    targetcodeSnippets.push(`{
+    projectName: targetProjectName,
-      "name": "${targetProjectName}" ,
+    refProjectName,
-      "version": "1.0.0",
+    refVersion,
-      "dependencies": {
+  });
-        "${refProjectName}": "${refVersion}"
+
-      }
+  createPackageJson({
-    }`);
+    filePaths: refFilePaths,
-    targetFilePaths.push('./package.json');
+    codeSnippets: refcodeSnippets,
-  }
+    projectName: refProjectName,
+  });
 
   // Create target mock
-  const targetMock = mockProject(targetcodeSnippets, {
+  const targetMock = getMockObjectForProject(targetcodeSnippets, {
     filePaths: targetFilePaths,
     projectName: targetProjectName,
     projectPath: searchTargetProject.path || 'fictional/target/project',

packages-node/providence-analytics/test-node/cli/cli.test.js

@@ -568,7 +568,7 @@ describe('CLI helpers', () => {
       };
 
       const theirProject = {
-        path: '/their-components',
+        path: '/my-components/node_modules/their-components',
         name: 'their-components',
         files: Object.entries(theirProjectFiles).map(([file, code]) => ({ file, code })),
       };
@@ -582,7 +582,7 @@ describe('CLI helpers', () => {
       mockTargetAndReferenceProject(theirProject, myProject);
 
       const result = await getExtendDocsResults({
-        referenceProjectPaths: ['/their-components'],
+        referenceProjectPaths: [theirProject.path],
         prefixCfg: { from: 'their', to: 'my' },
         extensions: ['.js'],
         cwd: '/my-components',

packages-node/providence-analytics/test-node/program/analyzers/match-imports.test.js

@@ -21,12 +21,12 @@ const {
 const matchImportsQueryConfig = QueryService.getQueryConfigFromAnalyzer('match-imports');
 const _providenceCfg = {
   targetProjectPaths: ['/importing/target/project'],
-  referenceProjectPaths: ['/exporting/ref/project'],
+  referenceProjectPaths: ['/importing/target/project/node_modules/exporting-ref-project'],
 };
 
 // 1. Reference input data
 const referenceProject = {
-  path: '/exporting/ref/project',
+  path: '/importing/target/project/node_modules/exporting-ref-project',
   name: 'exporting-ref-project',
   files: [
     // This file contains all 'original' exported definitions
@@ -253,10 +253,125 @@ describe('Analyzer "match-imports"', () => {
   }
 
   describe('Extracting exports', () => {
+    it(`identifies all direct export specifiers consumed by target`, async () => {
+      const refProject = {
+        path: '/target/node_modules/ref',
+        name: 'ref',
+        files: [{ file: './direct.js', code: `export default function x() {};` }],
+      };
+      const targetProject = {
+        path: '/target',
+        name: 'target',
+        files: [{ file: './index.js', code: `import myFn from 'ref/direct.js';` }],
+      };
+      mockTargetAndReferenceProject(targetProject, refProject);
+      await providence(matchImportsQueryConfig, {
+        targetProjectPaths: [targetProject.path],
+        referenceProjectPaths: [refProject.path],
+      });
+      const queryResult = queryResults[0];
+      expect(queryResult.queryOutput).eql([
+        {
+          exportSpecifier: {
+            filePath: './direct.js',
+            id: '[default]::./direct.js::ref',
+            name: '[default]',
+            project: 'ref',
+          },
+          matchesPerProject: [{ files: ['./index.js'], project: 'target' }],
+        },
+      ]);
+    });
+
+    it(`identifies all indirect (transitive) export specifiers consumed by target`, async () => {
+      const refProject = {
+        path: '/target/node_modules/ref',
+        name: 'ref',
+        files: [
+          { file: './direct.js', code: `export function x() {};` },
+          { file: './indirect.js', code: `export { x } from './direct.js';` },
+        ],
+      };
+      const targetProject = {
+        path: '/target',
+        name: 'target',
+        files: [{ file: './index.js', code: `import { x } from 'ref/indirect.js';` }],
+      };
+      mockTargetAndReferenceProject(targetProject, refProject);
+      await providence(matchImportsQueryConfig, {
+        targetProjectPaths: [targetProject.path],
+        referenceProjectPaths: [refProject.path],
+      });
+      const queryResult = queryResults[0];
+      expect(queryResult.queryOutput).eql([
+        {
+          exportSpecifier: {
+            filePath: './indirect.js',
+            id: 'x::./indirect.js::ref',
+            name: 'x',
+            project: 'ref',
+          },
+          matchesPerProject: [{ files: ['./index.js'], project: 'target' }],
+        },
+      ]);
+    });
+
+    it(`matches namespaced specifiers consumed by target`, async () => {
+      const refProject = {
+        path: '/target/node_modules/ref',
+        name: 'ref',
+        files: [
+          { file: './namespaced.js', code: `export function x() {}; export function y() {};` },
+        ],
+      };
+      const targetProject = {
+        path: '/target',
+        name: 'target',
+        files: [{ file: './index.js', code: `import * as xy from 'ref/namespaced.js';` }],
+      };
+      mockTargetAndReferenceProject(targetProject, refProject);
+      await providence(matchImportsQueryConfig, {
+        targetProjectPaths: [targetProject.path],
+        referenceProjectPaths: [refProject.path],
+      });
+      const queryResult = queryResults[0];
+      expect(queryResult.queryOutput).eql([
+        {
+          exportSpecifier: {
+            filePath: './namespaced.js',
+            id: 'x::./namespaced.js::ref',
+            name: 'x',
+            project: 'ref',
+          },
+          matchesPerProject: [{ files: ['./index.js'], project: 'target' }],
+        },
+        {
+          exportSpecifier: {
+            filePath: './namespaced.js',
+            id: 'y::./namespaced.js::ref',
+            name: 'y',
+            project: 'ref',
+          },
+          matchesPerProject: [{ files: ['./index.js'], project: 'target' }],
+        },
+        {
+          exportSpecifier: {
+            filePath: './namespaced.js',
+            id: '[file]::./namespaced.js::ref',
+            name: '[file]',
+            project: 'ref',
+          },
+          matchesPerProject: [{ files: ['./index.js'], project: 'target' }],
+        },
+      ]);
+    });
+
+    describe('Inside small example project', () => {
       it(`identifies all direct export specifiers consumed by "importing-target-project"`, async () => {
         mockTargetAndReferenceProject(searchTargetProject, referenceProject);
         await providence(matchImportsQueryConfig, _providenceCfg);
         const queryResult = queryResults[0];
+        // console.log(JSON.stringify(queryResult.queryOutput, null, 2));
         expectedExportIdsDirect.forEach(directId => {
           expect(
             queryResult.queryOutput.find(
@@ -292,8 +407,40 @@ describe('Analyzer "match-imports"', () => {
         });
       });
     });
+  });
 
   describe('Matching', () => {
+    it(`produces a list of all matches, sorted by project`, async () => {
+      /**
+       * N.B. output structure could be simplified, since there is
+       * For now, we keep it, so integration with dashboard stays intact.
+       * TODO:
+       * - write tests for dashboard transform logic
+       * - simplify output for match-* analyzers
+       * - adjust dashboard transfrom logic
+       */
+      const refProject = {
+        path: '/target/node_modules/ref',
+        name: 'ref',
+        files: [{ file: './direct.js', code: `export default function x() {};` }],
+      };
+      const targetProject = {
+        path: '/target',
+        name: 'target',
+        files: [{ file: './index.js', code: `import myFn from 'ref/direct.js';` }],
+      };
+      mockTargetAndReferenceProject(targetProject, refProject);
+      await providence(matchImportsQueryConfig, {
+        targetProjectPaths: [targetProject.path],
+        referenceProjectPaths: [refProject.path],
+      });
+      const queryResult = queryResults[0];
+      expect(queryResult.queryOutput[0].matchesPerProject).eql([
+        { files: ['./index.js'], project: 'target' },
+      ]);
+    });
+
+    describe('Inside small example project', () => {
       it(`produces a list of all matches, sorted by project`, async () => {
         mockTargetAndReferenceProject(searchTargetProject, referenceProject);
         await providence(matchImportsQueryConfig, _providenceCfg);
@@ -308,6 +455,7 @@ describe('Analyzer "match-imports"', () => {
         });
       });
     });
+  });
 
   describe('Configuration', () => {
     it(`allows to provide results of FindExportsAnalyzer and FindImportsAnalyzer`, async () => {

packages-node/providence-analytics/test-node/program/analyzers/match-paths.test.js

@@ -15,12 +15,6 @@ const {
   restoreSuppressNonCriticalLogs,
 } = require('../../../test-helpers/mock-log-service-helpers.js');
 
-const matchPathsQueryConfig = QueryService.getQueryConfigFromAnalyzer('match-paths');
-const _providenceCfg = {
-  targetProjectPaths: ['/importing/target/project'],
-  referenceProjectPaths: ['/exporting/ref/project'],
-};
-
 describe('Analyzer "match-paths"', () => {
   const originalReferenceProjectPaths = InputDataService.referenceProjectPaths;
   const queryResults = [];
@@ -48,8 +42,8 @@ describe('Analyzer "match-paths"', () => {
   });
 
   const referenceProject = {
-    path: '/exporting/ref/project',
+    path: '/importing/target/project/node_modules/reference-project',
-    name: 'exporting-ref-project',
+    name: 'reference-project',
     files: [
       {
         file: './ref-src/core.js',
@@ -90,8 +84,8 @@ describe('Analyzer "match-paths"', () => {
         file: './target-src/ExtendRefRenamedClass.js',
         code: `
       // renamed import (indirect, needs transitivity check)
-      import { RefRenamedClass } from 'exporting-ref-project/reexport.js';
+      import { RefRenamedClass } from 'reference-project/reexport.js';
-      import defaultExport from 'exporting-ref-project/reexport.js';
+      import defaultExport from 'reference-project/reexport.js';
 
       /**
        * This should result in:
@@ -110,10 +104,10 @@ describe('Analyzer "match-paths"', () => {
         file: './target-src/direct-imports.js',
         code: `
       // a direct named import
-      import { RefClass } from 'exporting-ref-project/ref-src/core.js';
+      import { RefClass } from 'reference-project/ref-src/core.js';
 
       // a direct default import
-      import RefDefault from 'exporting-ref-project/reexport.js';
+      import RefDefault from 'reference-project/reexport.js';
 
       /**
        * This should result in:
@@ -148,6 +142,12 @@ describe('Analyzer "match-paths"', () => {
     ],
   };
 
+  const matchPathsQueryConfig = QueryService.getQueryConfigFromAnalyzer('match-paths');
+  const _providenceCfg = {
+    targetProjectPaths: [searchTargetProject.path],
+    referenceProjectPaths: [referenceProject.path],
+  };
+
   describe('Variables', () => {
     const expectedMatches = [
       {
@@ -161,7 +161,7 @@ describe('Analyzer "match-paths"', () => {
               to: './target-src/ExtendRefRenamedClass.js',
             },
             {
-              from: 'exporting-ref-project/reexport.js',
+              from: 'reference-project/reexport.js',
               to: './target-src/ExtendRefRenamedClass.js',
             },
           ],
@@ -182,11 +182,11 @@ describe('Analyzer "match-paths"', () => {
               to: './index.js',
             },
             {
-              from: 'exporting-ref-project/reexport.js',
+              from: 'reference-project/reexport.js',
               to: './index.js',
             },
             {
-              from: 'exporting-ref-project/ref-src/core.js',
+              from: 'reference-project/ref-src/core.js',
               to: './index.js',
             },
           ],
@@ -203,7 +203,7 @@ describe('Analyzer "match-paths"', () => {
               to: './target-src/direct-imports.js',
             },
             {
-              from: 'exporting-ref-project/ref-src/core.js',
+              from: 'reference-project/ref-src/core.js',
               to: './target-src/direct-imports.js',
             },
           ],
@@ -220,7 +220,7 @@ describe('Analyzer "match-paths"', () => {
 
     describe('Features', () => {
       const refProj = {
-        path: '/exporting/ref/project',
+        path: '/importing/target/project/node_modules/reference-project',
         name: 'reference-project',
         files: [
           {
@@ -376,7 +376,7 @@ describe('Analyzer "match-paths"', () => {
 
     describe('Options', () => {
       const refProj = {
-        path: '/exporting/ref/project',
+        path: '/importing/target/project/node_modules/reference-project',
         name: 'reference-project',
         files: [
           {
@@ -446,8 +446,8 @@ describe('Analyzer "match-paths"', () => {
   describe('Tags', () => {
     // eslint-disable-next-line no-shadow
     const referenceProject = {
-      path: '/exporting/ref/project',
+      path: '/importing/target/project/node_modules/reference-project',
-      name: 'exporting-ref-project',
+      name: 'reference-project',
       files: [
         {
           file: './customelementDefinitions.js',
@@ -493,7 +493,7 @@ describe('Analyzer "match-paths"', () => {
         {
           file: './extendedClassDefinitions.js',
           code: `
-            export { El1, El2 } from 'exporting-ref-project/classDefinitions.js';
+            export { El1, El2 } from 'reference-project/classDefinitions.js';
 
             export class ExtendedEl1 extends El1 {}
         `,
@@ -517,7 +517,7 @@ describe('Analyzer "match-paths"', () => {
         paths: [
           { from: './customelementDefinitions.js', to: './extendedCustomelementDefinitions.js' },
           {
-            from: 'exporting-ref-project/customelementDefinitions.js',
+            from: 'reference-project/customelementDefinitions.js',
             to: './extendedCustomelementDefinitions.js',
           },
         ],
@@ -528,7 +528,7 @@ describe('Analyzer "match-paths"', () => {
         paths: [
           { from: './customelementDefinitions.js', to: './extendedCustomelementDefinitions.js' },
           {
-            from: 'exporting-ref-project/customelementDefinitions.js',
+            from: 'reference-project/customelementDefinitions.js',
             to: './extendedCustomelementDefinitions.js',
           },
         ],
@@ -642,7 +642,7 @@ describe('Analyzer "match-paths"', () => {
         await providence(matchPathsQueryConfig, _providenceCfg);
         const queryResult = queryResults[0];
         expect(queryResult.queryOutput[0].tag.paths[1]).to.eql({
-          from: 'exporting-ref-project/customelementDefinitions.js',
+          from: 'reference-project/customelementDefinitions.js',
           to: './extendedCustomelementDefinitions.js',
         });
       });
@@ -692,7 +692,7 @@ describe('Analyzer "match-paths"', () => {
               to: './target-src/ExtendRefRenamedClass.js',
             },
             {
-              from: 'exporting-ref-project/reexport.js',
+              from: 'reference-project/reexport.js',
               to: './target-src/ExtendRefRenamedClass.js',
             },
           ],
@@ -713,11 +713,11 @@ describe('Analyzer "match-paths"', () => {
               to: './index.js',
             },
             {
-              from: 'exporting-ref-project/reexport.js',
+              from: 'reference-project/reexport.js',
               to: './index.js',
             },
             {
-              from: 'exporting-ref-project/ref-src/core.js',
+              from: 'reference-project/ref-src/core.js',
               to: './index.js',
             },
           ],
@@ -734,7 +734,7 @@ describe('Analyzer "match-paths"', () => {
               to: './target-src/direct-imports.js',
             },
             {
-              from: 'exporting-ref-project/ref-src/core.js',
+              from: 'reference-project/ref-src/core.js',
               to: './target-src/direct-imports.js',
             },
           ],
@@ -748,7 +748,7 @@ describe('Analyzer "match-paths"', () => {
               to: './tag-extended.js',
             },
             {
-              from: 'exporting-ref-project/tag.js',
+              from: 'reference-project/tag.js',
               to: './tag-extended.js',
             },
           ],

packages-node/providence-analytics/test-node/program/analyzers/match-subclasses.test.js

@@ -15,15 +15,9 @@ const {
   restoreSuppressNonCriticalLogs,
 } = require('../../../test-helpers/mock-log-service-helpers.js');
 
-const matchSubclassesQueryConfig = QueryService.getQueryConfigFromAnalyzer('match-subclasses');
-const _providenceCfg = {
-  targetProjectPaths: ['/importing/target/project'],
-  referenceProjectPaths: ['/exporting/ref/project'],
-};
-
 // 1. Reference input data
 const referenceProject = {
-  path: '/exporting/ref/project',
+  path: '/importing/target/project/node_modules/exporting-ref-project',
   name: 'exporting-ref-project',
   files: [
     // This file contains all 'original' exported definitions
@@ -92,6 +86,12 @@ const searchTargetProject = {
   ],
 };
 
+const matchSubclassesQueryConfig = QueryService.getQueryConfigFromAnalyzer('match-subclasses');
+const _providenceCfg = {
+  targetProjectPaths: [searchTargetProject.path],
+  referenceProjectPaths: [referenceProject.path],
+};
+
 // 2. Extracted specifiers (by find-exports analyzer)
 const expectedExportIdsIndirect = ['RefRenamedClass::./index.js::exporting-ref-project'];
 

packages-node/providence-analytics/test-node/program/utils/resolve-import-path.test.js

@@ -0,0 +1,115 @@
+const { expect } = require('chai');
+const {
+  mockProject,
+  restoreMockedProjects,
+  mockTargetAndReferenceProject,
+} = require('../../../test-helpers/mock-project-helpers.js');
+const { resolveImportPath } = require('../../../src/program/utils/resolve-import-path.js');
+
+describe('resolveImportPath', () => {
+  afterEach(() => {
+    restoreMockedProjects();
+  });
+
+  it(`resolves file in same project`, async () => {
+    mockProject(
+      {
+        './src/declarationOfMyClass.js': `
+        export class MyClass extends HTMLElement {}
+      `,
+        './currentFile.js': `
+        import { MyClass } from './src/declarationOfMyClass';
+      `,
+      },
+      {
+        projectName: 'my-project',
+        projectPath: '/my/project',
+      },
+    );
+
+    const foundPath = await resolveImportPath(
+      './src/declarationOfMyClass',
+      '/my/project/currentFile.js',
+    );
+    expect(foundPath).to.equal('/my/project/src/declarationOfMyClass.js');
+  });
+
+  it(`resolves file in different projects`, async () => {
+    const targetProject = {
+      path: '/target/node_modules/ref',
+      name: 'ref',
+      files: [
+        {
+          file: './index.js',
+          code: `
+          export const x = 10;
+          `,
+        },
+      ],
+    };
+    const referenceProject = {
+      path: '/target',
+      name: 'target',
+      files: [
+        // This file contains all 'original' exported definitions
+        {
+          file: './a.js',
+          code: `
+            import { x } from 'ref';
+          `,
+        },
+      ],
+    };
+
+    mockTargetAndReferenceProject(targetProject, referenceProject);
+
+    const foundPath = await resolveImportPath('ref', '/target/a.js');
+    expect(foundPath).to.equal('/target/node_modules/ref/index.js');
+  });
+
+  it(`resolves export maps`, async () => {
+    const targetProject = {
+      path: '/target/node_modules/ref',
+      name: 'ref',
+      files: [
+        {
+          file: './packages/x/index.js',
+          code: `
+          export const x = 10;
+          `,
+        },
+        {
+          file: './package.json',
+          code: JSON.stringify({
+            name: 'ref',
+            exports: {
+              './x': './packages/x/index.js',
+            },
+          }),
+        },
+      ],
+    };
+    const referenceProject = {
+      path: '/target',
+      name: 'target',
+      files: [
+        // This file contains all 'original' exported definitions
+        {
+          file: './a.js',
+          code: `
+            import { x } from 'ref/x';
+          `,
+        },
+      ],
+    };
+
+    mockTargetAndReferenceProject(targetProject, referenceProject);
+
+    const foundPath = await resolveImportPath('ref/x', '/target/a.js');
+    expect(foundPath).to.equal('/target/node_modules/ref/packages/x/index.js');
+  });
+
+  /**
+   * All edge cases are covered by https://github.com/rollup/plugins/tree/master/packages/node-resolve/test
+   */
+});