Add utilities for unit testing: testing_utils.js

cowlicks · cowlicks · commit 1ff88919be17 · 2017-10-16T19:42:38.000-07:00
diff --git a/chromium/test/testing_utils.js b/chromium/test/testing_utils.js
@@ -0,0 +1,29 @@
+'use strict'
+
+function Mock() {
+  let out = function() {
+    out.calledWith = Array.from(arguments);
+  }
+  return out;
+}
+
+function stub(name, value) {
+  let parts = name.split('.'),
+    last = parts.pop(),
+    part = global;
+  parts.forEach(partName => {
+    if (!part.hasOwnProperty(partName)) {
+      part[partName] = {};
+    }
+    part = part[partName];
+  });
+  part[last] = value;
+}
+
+function stubber(namesValues) {
+  namesValues.forEach(nameValue => {
+    stub(...nameValue);
+  });
+}
+
+Object.assign(exports, {Mock, stub, stubber});
