ESLintBear: Add filename context

Adds information about current file location for ESLint.
Aids in relative imports.

Fixes #741

bears/js/ESLintBear.py

@@ -36,7 +36,14 @@ def create_arguments(filename, file, config_file,
         """
         :param eslint_config: The location of the .eslintrc config file.
         """
-        args = '--no-ignore', '--no-color', '-f=json', '--stdin'
+        args = (
+            '--no-ignore',
+            '--no-color',
+            '-f=json',
+            '--stdin',
+            '--stdin-filename=' + filename,
+        )
+
         if eslint_config:
             args += ('--config', eslint_config)
         else:

package.json

@@ -4,12 +4,14 @@
   "dependencies": {
     "alex": "~2",
     "autoprefixer": "~6",
+    "babel-eslint": "~6",
     "bootlint": "~0",
     "coffeelint": "~1",
     "complexity-report": "~2.0.0-alpha",
     "csslint": "~0",
     "dockerfile_lint": "~0",
     "eslint": "~2",
+    "eslint-plugin-import": "~1",
     "happiness":"~7.1.2",
     "jshint": "~2",
     "postcss-cli": "~2",

tests/js/ESLintBearTest.py

@@ -24,6 +24,18 @@
 };
 """
 
+test_import_good = """
+import test from "./test";
+
+test();
+"""
+
+test_import_bad = """
+import test from "../test";
+
+test();
+"""
+
 test_syntax_error = '{<!@3@^ yeah!/\n'
 
 test_dir = os.path.join(os.path.dirname(__file__), "test_files")
@@ -47,3 +59,11 @@
     invalid_files=(),
     settings={"eslint_config": os.path.join(test_dir,
                                             "eslintconfig_badplugin.json")})
+ESLintBearImportTest = verify_local_bear(
+    ESLintBear,
+    valid_files=(test_import_good, ),
+    invalid_files=(test_import_bad, ),
+    filename=os.path.join(test_dir, 'test.js'),
+    create_tempfile=False,
+    settings={"eslint_config": os.path.join(test_dir,
+                                            "eslintconfig_import.json")})

tests/js/test_files/eslintconfig_import.json

@@ -0,0 +1,8 @@
+{
+  "extends": "eslint:recommended",
+  "parser": "babel-eslint",
+  "plugins": ["import"],
+  "rules": {
+    "import/no-unresolved": ["error"]
+  }
+}

tests/js/test_files/test.js

@@ -0,0 +1,3 @@
+export default function test() {
+    return true;
+}