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gaia/tests/jsmarionette/runner/marionette-js-runner/lib/resolvemodule.js

@@ -0,0 +1,27 @@
+'use strict';
+var fsPath = require('path');
+
+/**
+ * Resolves a path to a given module. This only works if the module exports a
+ * module from the root of its package (almost all modules ever).
+ *
+ *    resolveModule('mocha', 'bin', '_mocha');
+ *    // => /node_modules/(...)/mocha/bin/_mocha
+ *
+ * @private
+ * @param {String} module path.
+ * @param {...*} parts to extend path with.
+ * @return {String}
+ */
+function resolveModule(module, parts) {
+  var args = Array.prototype.slice.call(arguments);
+  parts = args.slice(1);
+
+  // resolve the module
+  var modulePath = fsPath.dirname(require.resolve(module));
+
+  // add given parts of the path to the module path.
+  return fsPath.join.apply(fsPath, [modulePath].concat(parts));
+}
+
+module.exports = resolveModule;