Start requirements unit testing (#365)

diff --git a/spec/cli.spec.js b/spec/cli.spec.js
index 7f0ab5d..7e7b626 100644
--- a/spec/cli.spec.js
+++ b/spec/cli.spec.js
@@ -513,4 +513,16 @@
         });
 
     });
+
+    describe('requirements', () => {
+        beforeEach(() => {
+            spyOn(cordova, 'requirements').and.returnValue(Promise.resolve({ browser: [] }));
+        });
+
+        it('should succeed on browser as the platform argument to the requirement check method.', () => {
+            return cli(['node', 'cordova', 'requirements', 'browser']).then(() => {
+                expect(cordova.requirements).toHaveBeenCalledWith(['browser']);
+            });
+        });
+    });
 });