From b1600adec47a04f60e1da07d94a3ed3906ff5aee Mon Sep 17 00:00:00 2001
From: Wes Bos <wesbos@gmail.com>
Date: Thu, 14 Jun 2018 16:44:21 -0400
Subject: starter files

---
 .../frontend/__tests__/Pagination.test.js          | 94 ++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 finished-application/frontend/__tests__/Pagination.test.js

(limited to 'finished-application/frontend/__tests__/Pagination.test.js')

diff --git a/finished-application/frontend/__tests__/Pagination.test.js b/finished-application/frontend/__tests__/Pagination.test.js
new file mode 100644
index 0000000..29a57f9
--- /dev/null
+++ b/finished-application/frontend/__tests__/Pagination.test.js
@@ -0,0 +1,94 @@
+import React from 'react';
+import { shallow, mount } from 'enzyme';
+import toJSON from 'enzyme-to-json';
+import Pagination, { PAGINATION_QUERY } from '../components/Pagination';
+import { MockedProvider } from 'react-apollo/test-utils';
+import wait from 'waait';
+import { fakeItem } from '../lib/testUtils';
+
+import Router from 'next/router';
+
+// mock the router because there isn't really a router instance
+Router.router = { push() {}, prefetch() {} };
+
+function makeMocksFor(length) {
+  return [
+    {
+      request: { query: PAGINATION_QUERY, variables: { skip: 0, first: 4 } },
+      result: {
+        data: {
+          itemsConnection: {
+            __typename: 'aggregate',
+            aggregate: {
+              count: length,
+              __typename: 'count',
+            },
+          },
+        },
+      },
+    },
+  ];
+}
+
+describe('<Pagination/>', () => {
+  it('displays loading message', async () => {
+    const wrapper = mount(
+      <MockedProvider mocks={makeMocksFor(1)}>
+        <Pagination page={1} />
+      </MockedProvider>
+    );
+    await wait();
+    wrapper.update();
+    expect(toJSON(wrapper.find('div[data-test="pagination"]'))).toMatchSnapshot();
+  });
+
+  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');
+  });
+
+  it('disables prev button on first page', async () => {
+    const wrapper = mount(
+      <MockedProvider mocks={makeMocksFor(18)}>
+        <Pagination page={1} />
+      </MockedProvider>
+    );
+    await wait();
+    wrapper.update();
+    // first page
+    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();
+    // first page
+    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={2} />
+      </MockedProvider>
+    );
+    await wait();
+    wrapper.update();
+    // first page
+    expect(wrapper.find('a.prev').prop('aria-disabled')).toEqual(false);
+    expect(wrapper.find('a.next').prop('aria-disabled')).toEqual(false);
+  });
+});
-- 
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