[TEST] Add test cases (import-js#4)

Added some test cases to sanity check the config.

Author: bradzacher

README.md

@@ -1,23 +1,47 @@
 # eslint-import-resolver-typescript
 
-This plugin allows you to resolve `typescript` files with `eslint-plugin-import`.
+This plugin adds typescript support to [`eslint-plugin-import`](https://www.npmjs.com/package/eslint-plugin-import).
 
-The resolution respects the [`paths`](https://www.typescriptlang.org/docs/handbook/module-resolution.html#path-mapping) you have defined in your `tsconfig.json`.
+This means you can:
 
-![](screenshot.png)
+- `import`/`require` files with extension `.ts`/`.tsx` **without** using `--ext`!
+- Use [`paths`](https://www.typescriptlang.org/docs/handbook/module-resolution.html#path-mapping) defined in `tsconfig.json`.
 
 ## Installation
 
 ```bash
-npm install --save-dev eslint-import-resolver-typescript
+npm install --save-dev eslint-plugin-import typescript-eslint-parser eslint-import-resolver-typescript
 ```
 
-Add the following to your eslint config:
+## Configuration
+
+Add the following to your `.eslintrc` config:
 
 ```JSON
-"settings": {
-  "import/resolver": {
-    "typescript": true
+{
+  "settings": {
+    "parser": "typescript-eslint-parser",
+    "plugins": [
+      "import"
+    ],
+    "rules": {
+      // turn on errors for missing imports
+      "import/no-unresolved": "error"
+    },
+    "import/resolver": {
+      // use <root>/tsconfig.json
+      "typescript": {},
+
+      // use <root>/path/to/folder/tsconfig.json
+      "typescript": {
+        "directory": "./path/to/folder"
+      }
+    }
   }
 }
 ```
+
+## Contributing
+
+- Make sure your change is covered by a test import.
+- Make sure that `npm test` passes without a failure.