Charting: Adding tests for AreaChart (#15702)

Cherry-pick of #15520.

change/@fluentui-react-charting-2020-10-26-14-48-23-areaChartTests.json

@@ -0,0 +1,8 @@
+{
+  "type": "none",
+  "comment": "Charting: Adding tests for AreaChart.",
+  "packageName": "@fluentui/react-charting",
+  "email": "humbertomakotomorimoto@gmail.com",
+  "dependentChangeType": "none",
+  "date": "2020-10-26T21:48:22.991Z"
+}

packages/react-charting/src/components/AreaChart/AreaChart.test.tsx

@@ -0,0 +1,192 @@
+jest.mock('react-dom');
+import * as React from 'react';
+import { resetIds } from '../../Utilities';
+import * as renderer from 'react-test-renderer';
+import { mount, ReactWrapper } from 'enzyme';
+import { IAreaChartProps, AreaChart } from './index';
+import { IAreaChartState, AreaChartBase } from './AreaChart.base';
+import { ICustomizedCalloutData } from '../../index';
+
+// Wrapper of the AreaChart to be tested.
+let wrapper: ReactWrapper<IAreaChartProps, IAreaChartState, AreaChartBase> | undefined;
+
+function sharedBeforeEach() {
+  resetIds();
+}
+
+function sharedAfterEach() {
+  if (wrapper) {
+    wrapper.unmount();
+    wrapper = undefined;
+  }
+
+  // Do this after unmounting the wrapper to make sure if any timers cleaned up on unmount are
+  // cleaned up in fake timers world
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  if ((global.setTimeout as any).mock) {
+    jest.useRealTimers();
+  }
+}
+
+const points = [
+  {
+    legend: 'metaData1',
+    data: [
+      { x: 20, y: 50 },
+      { x: 40, y: 80 },
+    ],
+    color: 'red',
+  },
+];
+const chartPoints = {
+  chartTitle: 'AreaChart',
+  lineChartData: points,
+};
+
+describe('AreaChart snapShot testing', () => {
+  it('renders Areachart correctly', () => {
+    const component = renderer.create(<AreaChart data={chartPoints} />);
+    const tree = component.toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+
+  it('renders hideLegend hhh correctly', () => {
+    const component = renderer.create(<AreaChart data={chartPoints} hideLegend={true} />);
+    const tree = component.toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+
+  it('renders hideTooltip correctly', () => {
+    const component = renderer.create(<AreaChart data={chartPoints} hideTooltip={true} />);
+    const tree = component.toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+
+  it('renders enabledLegendsWrapLines correctly', () => {
+    const component = renderer.create(<AreaChart data={chartPoints} enabledLegendsWrapLines={true} />);
+    const tree = component.toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+
+  it('renders showXAxisLablesTooltip correctly', () => {
+    const component = renderer.create(<AreaChart data={chartPoints} showXAxisLablesTooltip={true} />);
+    const tree = component.toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+
+  it('renders wrapXAxisLables correctly', () => {
+    const component = renderer.create(<AreaChart data={chartPoints} wrapXAxisLables={true} />);
+    const tree = component.toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+
+  it('renders yAxisTickFormat correctly', () => {
+    const component = renderer.create(<AreaChart data={chartPoints} yAxisTickFormat={'/%d'} />);
+    const tree = component.toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+});
+
+describe('AreaChart - basic props', () => {
+  beforeEach(sharedBeforeEach);
+  afterEach(sharedAfterEach);
+
+  it('Should not mount legend when hideLegend true ', () => {
+    wrapper = mount(<AreaChart data={chartPoints} hideLegend={true} />);
+    const hideLegendDOM = wrapper.getDOMNode().querySelectorAll('[class^="legendContainer"]');
+    expect(hideLegendDOM!.length).toBe(0);
+  });
+
+  it('Should mount legend when hideLegend false ', () => {
+    wrapper = mount(<AreaChart data={chartPoints} />);
+    const hideLegendDOM = wrapper.getDOMNode().querySelectorAll('[class^="legendContainer"]');
+    expect(hideLegendDOM).toBeDefined();
+  });
+
+  it('Should mount callout when hideTootip false ', () => {
+    wrapper = mount(<AreaChart data={chartPoints} />);
+    const hideLegendDOM = wrapper.getDOMNode().querySelectorAll('[class^="ms-Layer"]');
+    expect(hideLegendDOM).toBeDefined();
+  });
+
+  it('Should not mount callout when hideTootip true ', () => {
+    wrapper = mount(<AreaChart data={chartPoints} hideTooltip={true} />);
+    const hideLegendDOM = wrapper.getDOMNode().querySelectorAll('[class^="ms-Layer"]');
+    expect(hideLegendDOM.length).toBe(0);
+  });
+
+  it('Should render onRenderCalloutPerStack ', () => {
+    wrapper = mount(
+      <AreaChart
+        data={chartPoints}
+        onRenderCalloutPerStack={(props: ICustomizedCalloutData) =>
+          props ? (
+            <div className="onRenderCalloutPerStack">
+              <p>Custom Callout Content</p>
+            </div>
+          ) : null
+        }
+      />,
+    );
+    const renderedDOM = wrapper.getDOMNode().getElementsByClassName('.onRenderCalloutPerStack');
+    expect(renderedDOM).toBeDefined();
+  });
+
+  it('Should not render onRenderCalloutPerStack ', () => {
+    wrapper = mount(<AreaChart data={chartPoints} />);
+    const renderedDOM = wrapper.getDOMNode().getElementsByClassName('.onRenderCalloutPerStack');
+    expect(renderedDOM!.length).toBe(0);
+  });
+
+  it('Should render onRenderCalloutPerDataPoint ', () => {
+    wrapper = mount(
+      <AreaChart
+        data={chartPoints}
+        onRenderCalloutPerDataPoint={(props: ICustomizedCalloutData) =>
+          props ? (
+            <div className="onRenderCalloutPerDataPoint">
+              <p>Custom Callout Content</p>
+            </div>
+          ) : null
+        }
+      />,
+    );
+    const renderedDOM = wrapper.getDOMNode().getElementsByClassName('.onRenderCalloutPerDataPoint');
+    expect(renderedDOM).toBeDefined();
+  });
+
+  it('Should not render onRenderCalloutPerDataPoint ', () => {
+    wrapper = mount(<AreaChart data={chartPoints} />);
+    const renderedDOM = wrapper.getDOMNode().getElementsByClassName('.onRenderCalloutPerDataPoint');
+    expect(renderedDOM!.length).toBe(0);
+  });
+});
+
+describe('Render calling with respective to props', () => {
+  it('No prop changes', () => {
+    const renderMock = jest.spyOn(AreaChartBase.prototype, 'render');
+    const props = {
+      data: chartPoints,
+      height: 300,
+      width: 600,
+    };
+    const component = mount(<AreaChart {...props} />);
+    component.setProps({ ...props });
+    expect(renderMock).toHaveBeenCalledTimes(2);
+    renderMock.mockRestore();
+  });
+
+  it('prop changes', () => {
+    const renderMock = jest.spyOn(AreaChartBase.prototype, 'render');
+    const props = {
+      data: chartPoints,
+      height: 300,
+      width: 600,
+      hideLegend: true,
+    };
+    const component = mount(<AreaChart {...props} />);
+    component.setProps({ ...props, hideTooltip: true });
+    expect(renderMock).toHaveBeenCalledTimes(2);
+    renderMock.mockRestore();
+  });
+});