added tests for homepage

src/pages/CategoryPage/CategoryPage.test.js

@@ -39,7 +39,7 @@ describe('<CategoryPage/>', function () {
         let message;
         global.console.log = jest.fn((m) => {
             message = m;
-        })
+        });
 
         const wrapper = shallow(<CategoryPage/>);
 

src/pages/HomePage/HomePage.test.js

@@ -11,6 +11,11 @@ function prepareFetchApi(response) {
     return (jest.fn().mockImplementation(() => mockFetchPromise));
 }
 
+function prepareFailingFetchApi() {
+    const mockFetchPromise = Promise.reject("myreason");
+    return (jest.fn().mockImplementation(() => mockFetchPromise));
+}
+
 describe('<HomePage/>', function () {
     it('renders without crashing ', function () {
         const wrapper = shallow(<HomePage/>);
@@ -73,4 +78,43 @@ describe('<HomePage/>', function () {
             done();
         });
     });
+
+    it('test form submit', done => {
+        global.fetch = prepareFetchApi([{}, {}]);
+
+        const wrapper = shallow(<HomePage/>);
+
+        const fakeEvent = {preventDefault: () => console.log('preventDefault')};
+        wrapper.find(".searchform").simulate('submit', fakeEvent);
+
+        expect(wrapper.state().selectionnr).toBe(0);
+
+        process.nextTick(() => {
+            // state to be set correctly with response
+            expect(wrapper.state().selectionnr).toBe(2);
+
+            global.fetch.mockClear();
+            done();
+        });
+    });
+
+    it('test no backend connection behaviour', done => {
+        // this test assumes a console.log within every connection fail
+        global.fetch = prepareFailingFetchApi();
+
+        let count = 0;
+        global.console.log = jest.fn((m) => {
+            count++;
+        });
+
+        const wrapper = shallow(<HomePage/>);
+
+        process.nextTick(() => {
+            // state to be set correctly with response
+            expect(global.fetch).toBeCalledTimes(2);
+
+            global.fetch.mockClear();
+            done();
+        });
+    });
 });