fix(@angular/cli): Updated duplicate test messages

Author: Brocco

tests/e2e/tests/generate/component/component-duplicate.ts

@@ -0,0 +1,23 @@
+import { ng } from '../../../utils/process';
+import { oneLine } from 'common-tags';
+
+export default function () {
+  return ng('generate', 'component', 'test-component')
+    .then((output) => {
+      if (!output.stdout.match(/UPDATE src[\\|\/]app[\\|\/]app.module.ts/)) {
+        throw new Error(oneLine`
+          Expected to match
+          "UPDATE src/app/app.module.ts"
+          in ${output.stdout}.`);
+      }
+    })
+    .then(() => ng('generate', 'component', 'test-component'))
+    .then((output) => {
+      if (!output.stdout.match(/ERROR! src[\\|\/]app[\\|\/]test-component[\\|\/]test-component.component.ts already exists./)) {
+        throw new Error(oneLine`
+          Expected to match
+          "ERROR! src/app/test-component/test-component.ts"
+          in ${output.stdout}.`);
+      }
+    });
+}