Using the --non-interactive flag now force-overwrites files.

If a user applies this flag, no tty input should be required. This
ensures that it works as expected.

Change-Id: I20d00295f7164eec2442f45c91e9f1150bc605a0

generators/app/index.js

@@ -19,6 +19,9 @@
 
       // Add support for a `--non-interactive` flag
       this.option('non-interactive');
+
+      // If non-interactive is set, force-override all files.
+      this.conflicter.force = this.options['non-interactive'];
     },
 
     initializing: function () {

spec/app/index.js

@@ -25,6 +25,7 @@
         });
 
         helpers.run(generator)
+          .withArguments(['--non-interactive'])
           .on('end', function () {
             spies.forEach(function (spy) {
               expect(spy.calls.any()).toBeTruthy();
@@ -34,6 +35,18 @@
           });
       });
 
+    it('should force overwrite if --non-interactive is set.',
+      function (done) {
+        helpers.run(generator)
+          .withArguments(['--non-interactive'])
+          .on('ready', function (generator) {
+            expect(generator.conflicter.force).toBeTruthy();
+          })
+          .on('end', function () {
+            done();
+          });
+      });
+
     describe('writing()', function () {
       it('should create all files created in the project builder',
         function (done) {