test(ngMock.$httpBackend): add tests for the existence of when shortcut methods

Closes #9322

Author: gkalpak

test/ngMock/angular-mocksSpec.js

@@ -889,6 +889,17 @@ describe('ngMock', function() {
       expect(typeof hb.expectHEAD).toBe("function");
     });
 
+
+    it('should provide "when" methods for each HTTP verb', function() {
+      expect(typeof hb.whenGET).toBe("function");
+      expect(typeof hb.whenPOST).toBe("function");
+      expect(typeof hb.whenPUT).toBe("function");
+      expect(typeof hb.whenPATCH).toBe("function");
+      expect(typeof hb.whenDELETE).toBe("function");
+      expect(typeof hb.whenHEAD).toBe("function");
+    });
+
+
     it('should respond with first matched definition', function() {
       hb.when('GET', '/url1').respond(200, 'content', {});
       hb.when('GET', '/url1').respond(201, 'another', {});