feat: add alwaysTryTypes option, add tests

Author: JounQin

index.js

@@ -63,9 +63,9 @@ function resolveFile(source, file, config) {
   }
 
   // naive attempt at @types/* resolution,
-  // iff path is neither absolute nor relative
+  // if path is neither absolute nor relative
   if (
-    /\.jsx?$/.test(foundNodePath) &&
+    (config.alwaysTryTypes || /\.jsx?$/.test(foundNodePath)) &&
     !/^@types[/\\]/.test(source) &&
     !path.isAbsolute(source) &&
     source[0] !== '.'

package-lock.json

@@ -29,6 +29,7 @@
     "eslint-plugin-import": "*"
   },
   "devDependencies": {
+    "@types/unist": "^2.0.3",
     "dummy.js": "file:dummy.js",
     "eslint": "^5.6.1",
     "eslint-plugin-import": "^2.14.0",

package.json

@@ -26,6 +26,7 @@ module.exports = dirname => ({
     'import/resolver': {
       [path.resolve(`${__dirname}/../index.js`)]: {
         directory: dirname,
+        alwaysTryTypes: true
       },
     },
   },

tests/baseEslintConfig.js

@@ -0,0 +1,3 @@
+declare const content : 'yes';
+
+export default content;

tests/withoutPaths/dtsImportee.d.ts

@@ -1,9 +1,17 @@
 // import relative
 import './tsImportee'
 import './tsxImportee'
+import './dtsImportee'
+import './subfolder/dtsImportee'
 import './subfolder/tsImportee'
 import './subfolder/tsxImportee'
 
 // import from node_module
 import 'typescript'
 import 'dummy.js'
+
+// import from `@types/`
+import 'json5'
+
+// enable alwaysTryTypes 
+import 'unist'

tests/withoutPaths/index.ts

@@ -0,0 +1,3 @@
+declare const content : 'yes';
+
+export default content;