Rework test.

.prettierrc

@@ -0,0 +1,4 @@
+{
+  "trailingComma": "none",
+  "singleQuote": true
+}

src/__tests__/helpers/module.js

@@ -0,0 +1,44 @@
+module.exports = {
+  extensionName: 'test-extension',
+  toCamelCase: function(str) {
+    return str
+      .replace(/(?:^\w|[A-Z]|\b\w)/g, function(letter, index) {
+        return index === 0 ? letter.toLowerCase() : letter.toUpperCase();
+      })
+      .replace(/\s+/g, '');
+  },
+  toSnakeCase: function toSnakeCase(str) {
+    if (!str) return '';
+
+    return String(str)
+      .replace(/^[^A-Za-z0-9]*|[^A-Za-z0-9]*$/g, '')
+      .replace(/([a-z])([A-Z])/g, function(m, a, b) {
+        return a + '-' + b.toLowerCase();
+      })
+      .replace(/[^A-Za-z0-9]+|_-+/g, '-')
+      .toLowerCase();
+  },
+
+  createModule: function(name, scriptFn) {
+    var cName = this.toCamelCase(name);
+    var sName = this.toSnakeCase(name);
+
+    return [
+      this.getPath(cName),
+      {
+        name: sName,
+        displayName: name,
+        script: scriptFn
+      },
+      this.extensionName
+    ];
+  },
+
+  getPath: function(name) {
+    return this.extensionName + '/' + this.toCamelCase(name) + '.js';
+  },
+
+  getType: function(name) {
+    return this.extensionName + '.' + this.toSnakeCase(name);
+  }
+};