1 files changed, 89 insertions, 0 deletions
diff --git a/finished-application/frontend/__tests__/Pagination.test.js b/finished-application/frontend/__tests__/Pagination.test.js
new file mode 100644
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+++ b/finished-application/frontend/__tests__/Pagination.test.js
@@ -0,0 +1,89 @@
+import { mount } from 'enzyme';
+import wait from 'waait';
+import toJSON from 'enzyme-to-json';
+import Router from 'next/router';
+import Pagination, { PAGINATION_QUERY } from '../components/Pagination';
+import { MockedProvider } from 'react-apollo/test-utils';
+
+Router.router = {
+  push() {},
+  prefetch() {},
+};
+
+function makeMocksFor(length) {
+  return [
+    {
+      request: { query: PAGINATION_QUERY },
+      result: {
+        data: {
+          itemsConnection: {
+            __typename: 'aggregate',
+            aggregate: {
+              count: length,
+              __typename: 'count',
+            },
+          },
+        },
+      },
+    },
+  ];
+}
+
+describe('<Pagination/>', () => {
+  it('displays a loading message', () => {
+    const wrapper = mount(
+      <MockedProvider mocks={makeMocksFor(1)}>
+        <Pagination page={1} />
+      </MockedProvider>
+    );
+    const pagination = wrapper.find('[data-test="pagination"]');
+    expect(wrapper.text()).toContain('Loading...');
+  });
+
+  it('renders pagination for 18 items', async () => {
+    const wrapper = mount(
+      <MockedProvider mocks={makeMocksFor(18)}>
+        <Pagination page={1} />
+      </MockedProvider>
+    );
+    await wait();
+    wrapper.update();
+    expect(wrapper.find('.totalPages').text()).toEqual('5');
+    const pagination = wrapper.find('div[data-test="pagination"]');
+    expect(toJSON(pagination)).toMatchSnapshot();
+  });
+
+  it('disables prev button on first page', async () => {
+    const wrapper = mount(
+      <MockedProvider mocks={makeMocksFor(18)}>
+        <Pagination page={1} />
+      </MockedProvider>
+    );
+    await wait();
+    wrapper.update();
+    expect(wrapper.find('a.prev').prop('aria-disabled')).toEqual(true);
+    expect(wrapper.find('a.next').prop('aria-disabled')).toEqual(false);
+  });
+  it('disables next button on last page', async () => {
+    const wrapper = mount(
+      <MockedProvider mocks={makeMocksFor(18)}>
+        <Pagination page={5} />
+      </MockedProvider>
+    );
+    await wait();
+    wrapper.update();
+    expect(wrapper.find('a.prev').prop('aria-disabled')).toEqual(false);
+    expect(wrapper.find('a.next').prop('aria-disabled')).toEqual(true);
+  });
+  it('enables all buttons on a middle page', async () => {
+    const wrapper = mount(
+      <MockedProvider mocks={makeMocksFor(18)}>
+        <Pagination page={3} />
+      </MockedProvider>
+    );
+    await wait();
+    wrapper.update();
+    expect(wrapper.find('a.prev').prop('aria-disabled')).toEqual(false);
+    expect(wrapper.find('a.next').prop('aria-disabled')).toEqual(false);
+  });
+});