eslint/vue: implement getTest() on ESlint loader helper

Author: Kocal

lib/loaders/eslint.js

@@ -69,5 +69,19 @@ Install ${chalk.yellow('babel-eslint')} to prevent potential parsing issues: ${p
         };
 
         return applyOptionsCallback(webpackConfig.eslintLoaderOptionsCallback, eslintLoaderOptions);
+    },
+
+    /**
+     * @param {WebpackConfig} webpackConfig
+     * @return {RegExp} to use for eslint-loader `test` rule
+     */
+    getTest(webpackConfig) {
+        const extensions = ['jsx?'];
+
+        if (webpackConfig.eslintOptions.lintVue) {
+            extensions.push('vue');
+        }
+
+        return new RegExp(`\\.(${extensions.join('|')})$`);
     }
 };

test/loaders/eslint.js

@@ -74,4 +74,21 @@ describe('loaders/eslint', () => {
         const actualOptions = eslintLoader.getOptions(config);
         expect(actualOptions).to.deep.equals({ foo: true });
     });
+
+    it('getTest() base behavior', () => {
+        const config = createConfig();
+
+        const actualTest = eslintLoader.getTest(config);
+        expect(actualTest.toString()).to.equals(/\.(jsx?)$/.toString());
+    });
+
+    it('getTest() with Vue', () => {
+        const config = createConfig();
+        config.enableEslintLoader(() => {}, {
+            lintVue: true,
+        });
+
+        const actualTest = eslintLoader.getTest(config);
+        expect(actualTest.toString()).to.equals(/\.(jsx?|vue)$/.toString());
+    });
 });