test: refactor using .config.js (JS) for test configs (#230)

Author: evilebottnawi

test/configs/config.config.js

@@ -0,0 +1,9 @@
+module.exports = {
+  file: 'config',
+  options: {
+    config: {
+      path: 'test/fixtures/config/postcss.config.js',
+      ctx: { plugin: false }
+    }
+  }
+}

test/configs/config.json

@@ -0,0 +1,6 @@
+module.exports = {
+  file: 'error',
+  options: {
+    parser: 'sugarss'
+  }
+}

test/configs/error.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  file: 'exec',
+  options: {
+    exec: true
+  }
+}

test/configs/error.json

@@ -0,0 +1,8 @@
+module.exports = {
+  file: 'export',
+  options: {
+    config: {
+      path: 'test/fixtures/config/postcss.config.js'
+    }
+  }
+}

test/configs/exec.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  file: 'jss',
+  options: {
+    parser: 'postcss-js'
+  }
+}