From 331da87bd53bc1fb79063d142764c75df9f32170 Mon Sep 17 00:00:00 2001
From: Wes Bos <wesbos@gmail.com>
Date: Wed, 14 Mar 2018 12:19:54 -0400
Subject: tests

---
 frontend/__tests__/Pagination.test.js | 46 +++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 frontend/__tests__/Pagination.test.js

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

diff --git a/frontend/__tests__/Pagination.test.js b/frontend/__tests__/Pagination.test.js
new file mode 100644
index 0000000..e2ef7af
--- /dev/null
+++ b/frontend/__tests__/Pagination.test.js
@@ -0,0 +1,46 @@
+import React from 'react';
+import { shallow, mount } from 'enzyme';
+import toJSON from 'enzyme-to-json';
+import { Pagination } from '../components/Pagination';
+
+const fakeQuery = {
+  itemsConnection: { aggregate: { count: 18 } },
+};
+
+describe('<Pagination/>', () => {
+  it('displays loading message', () => {
+    const wrapper = shallow(<Pagination loading page={1} itemsQuery={fakeQuery} />);
+    expect(toJSON(wrapper)).toMatchSnapshot();
+  });
+
+  it('renders pagination for 18 items', () => {
+    const wrapper = shallow(<Pagination loading={false} page={1} itemsQuery={fakeQuery} />);
+    expect(toJSON(wrapper)).toMatchSnapshot();
+    expect(wrapper.find('.totalPages').text()).toEqual('2');
+  });
+
+  it('renders pagination for 28 items', () => {
+    const fakeQuery2 = {
+      itemsConnection: { aggregate: { count: 28 } },
+    };
+    const wrapper = shallow(<Pagination loading={false} page={1} itemsQuery={fakeQuery2} />);
+    expect(wrapper.find('.totalPages').text()).toEqual('4');
+  });
+
+  it('disables and enables next/prev buttons', () => {
+    const fakeQuery3 = {
+      itemsConnection: { aggregate: { count: 100 } },
+    };
+    const wrapper = shallow(<Pagination loading={false} page={1} itemsQuery={fakeQuery} />);
+
+    expect(wrapper.find('a.prev').props()['aria-disabled']).toEqual(true);
+    expect(wrapper.find('a.next').props()['aria-disabled']).toEqual(false);
+    wrapper.setProps({ page: 2 });
+    expect(wrapper.find('a.prev').props()['aria-disabled']).toEqual(false);
+    expect(wrapper.find('a.next').props()['aria-disabled']).toEqual(true);
+    // when in the middle, both should work
+    wrapper.setProps({ itemsQuery: fakeQuery3, page: 3 });
+    expect(wrapper.find('a.prev').props()['aria-disabled']).toEqual(false);
+    expect(wrapper.find('a.next').props()['aria-disabled']).toEqual(false);
+  });
+});
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