[Tests] no-extraneous-dependencies: add tests for importing types

CHANGELOG.md

@@ -11,6 +11,9 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 ### Fixed
 - [`no-extraneous-dependencies`]/TypeScript: do not error when importing type from dev dependencies ([#1820], thanks [@fernandopasik])
 
+### Changed
+- [`no-extraneous-dependencies`]: add tests for importing types ([#1824], thanks [@taye])
+
 ## [2.21.2] - 2020-06-09
 ### Fixed
 - [`order`]: avoid a crash on TypeScript’s `export import` syntax ([#1808], thanks [@ljharb])
@@ -707,6 +710,7 @@ for info on changes for earlier releases.
 
 [`memo-parser`]: ./memo-parser/README.md
 
+[#1824]: https://github.com/benmosher/eslint-plugin-import/pull/1824
 [#1820]: https://github.com/benmosher/eslint-plugin-import/pull/1820
 [#1819]: https://github.com/benmosher/eslint-plugin-import/pull/1819
 [#1802]: https://github.com/benmosher/eslint-plugin-import/pull/1802
@@ -1225,3 +1229,4 @@ for info on changes for earlier releases.
 [@malykhinvi]: https://github.com/malykhinvi
 [@nicolashenry]: https://github.com/nicolashenry
 [@fernandopasik]: https://github.com/fernandopasik
+[@taye]: https://github.com/taye

tests/src/rules/no-extraneous-dependencies.js

@@ -1,11 +1,15 @@
-import { getTSParsers, test } from '../utils'
-import * as path from 'path'
-import * as fs from 'fs'
+import { getTSParsers, test, testFilePath } from '../utils'
+import typescriptConfig from '../../../config/typescript'
+import path from 'path'
+import fs from 'fs'
+import semver from 'semver'
+import eslintPkg from 'eslint/package.json'
 
 import { RuleTester } from 'eslint'
 import flatMap from 'array.prototype.flatmap'
 
 const ruleTester = new RuleTester()
+const typescriptRuleTester = new RuleTester(typescriptConfig)
 const rule = require('rules/no-extraneous-dependencies')
 
 const packageDirWithSyntaxError = path.join(__dirname, '../../files/with-syntax-error')
@@ -315,54 +319,72 @@ ruleTester.run('no-extraneous-dependencies', rule, {
 })
 
 describe('TypeScript', function () {
-  getTSParsers()
-    .forEach((parser) => {
-      const parserConfig = {
-        parser: parser,
-        settings: {
-          'import/parsers': { [parser]: ['.ts'] },
-          'import/resolver': { 'eslint-import-resolver-typescript': true },
-        },
-      }
+  getTSParsers().forEach((parser) => {
+    const parserConfig = {
+      parser: parser,
+      settings: {
+        'import/parsers': { [parser]: ['.ts'] },
+        'import/resolver': { 'eslint-import-resolver-typescript': true },
+      },
+    }
 
-      if (parser !== require.resolve('typescript-eslint-parser')) {
-        ruleTester.run('no-extraneous-dependencies', rule, {
-          valid: [
-            test(Object.assign({
-              code: 'import type { JSONSchema7Type } from "@types/json-schema";',
-              options: [{packageDir: packageDirWithTypescriptDevDependencies, devDependencies: false }],
-            }, parserConfig)),
-          ],
-          invalid: [
-            test(Object.assign({
-              code: 'import { JSONSchema7Type } from "@types/json-schema";',
-              options: [{packageDir: packageDirWithTypescriptDevDependencies, devDependencies: false }],
-              errors: [{
-                message: "'@types/json-schema' should be listed in the project's dependencies, not devDependencies.",
-              }],
-            }, parserConfig)),
-          ],
-        })
-      } else {
-        ruleTester.run('no-extraneous-dependencies', rule, {
-          valid: [],
-          invalid: [
-            test(Object.assign({
-              code: 'import { JSONSchema7Type } from "@types/json-schema";',
-              options: [{packageDir: packageDirWithTypescriptDevDependencies, devDependencies: false }],
-              errors: [{
-                message: "'@types/json-schema' should be listed in the project's dependencies, not devDependencies.",
-              }],
-            }, parserConfig)),
-            test(Object.assign({
-              code: 'import type { JSONSchema7Type } from "@types/json-schema";',
-              options: [{packageDir: packageDirWithTypescriptDevDependencies, devDependencies: false }],
-              errors: [{
-                message: "'@types/json-schema' should be listed in the project's dependencies, not devDependencies.",
-              }],
-            }, parserConfig)),
-          ],
-        })
-      }
-    })
+    if (parser !== require.resolve('typescript-eslint-parser')) {
+      ruleTester.run('no-extraneous-dependencies', rule, {
+        valid: [
+          test(Object.assign({
+            code: 'import type { JSONSchema7Type } from "@types/json-schema";',
+            options: [{packageDir: packageDirWithTypescriptDevDependencies, devDependencies: false }],
+          }, parserConfig)),
+        ],
+        invalid: [
+          test(Object.assign({
+            code: 'import { JSONSchema7Type } from "@types/json-schema";',
+            options: [{packageDir: packageDirWithTypescriptDevDependencies, devDependencies: false }],
+            errors: [{
+              message: "'@types/json-schema' should be listed in the project's dependencies, not devDependencies.",
+            }],
+          }, parserConfig)),
+        ],
+      })
+    } else {
+      ruleTester.run('no-extraneous-dependencies', rule, {
+        valid: [],
+        invalid: [
+          test(Object.assign({
+            code: 'import { JSONSchema7Type } from "@types/json-schema";',
+            options: [{packageDir: packageDirWithTypescriptDevDependencies, devDependencies: false }],
+            errors: [{
+              message: "'@types/json-schema' should be listed in the project's dependencies, not devDependencies.",
+            }],
+          }, parserConfig)),
+          test(Object.assign({
+            code: 'import type { JSONSchema7Type } from "@types/json-schema";',
+            options: [{packageDir: packageDirWithTypescriptDevDependencies, devDependencies: false }],
+            errors: [{
+              message: "'@types/json-schema' should be listed in the project's dependencies, not devDependencies.",
+            }],
+          }, parserConfig)),
+        ],
+      })
+    }
+  })
 })
+
+if (semver.satisfies(eslintPkg.version, '>5.0.0')) {
+  typescriptRuleTester.run('no-extraneous-dependencies typescript type imports', rule, {
+    valid: [
+      test({
+        code: 'import type MyType from "not-a-dependency";',
+        filename: testFilePath('./no-unused-modules/typescript/file-ts-a.ts'),
+        parser: require.resolve('babel-eslint'),
+      }),
+      test({
+        code: 'import type { MyType } from "not-a-dependency";',
+        filename: testFilePath('./no-unused-modules/typescript/file-ts-a.ts'),
+        parser: require.resolve('babel-eslint'),
+      }),
+    ],
+    invalid: [
+    ],
+  })
+}