react-safe-src-doc-iframe
Version:
A component which applies guards to srcdoc iframes, providing a predictable and safe experience to the user.
92 lines (87 loc) • 12.4 kB
JavaScript
import React from 'react';
import { shallow, mount } from 'enzyme';
import SafeSrcDocIframe from './safe-src-doc-iframe';
describe('<SafeSrcDocIframe />', function () {
var mockDocument = '\n <!DOCTYPE html>\n <html>\n <head></head>\n <body>\n mock html page\n </body>\n </html>\n ';
var testIframe = function testIframe() {
return React.createElement(SafeSrcDocIframe, { title: 'some-title', srcDoc: mockDocument });
};
var renderShallowSafeframe = function renderShallowSafeframe() {
return shallow(testIframe());
};
var renderMountedSafeIframe = function renderMountedSafeIframe() {
return mount(testIframe());
};
beforeEach(function () {
jest.clearAllMocks();
});
it('renders as expected', function () {
expect(renderShallowSafeframe()).toMatchSnapshot();
});
it('will not configure onload for iframe during componentDidMount if ref does not exist', function () {
var wrapper = renderMountedSafeIframe();
expect(function () {
return wrapper.instance().componentDidMount.call({});
}).not.toThrow();
});
it('will configure onload for iframe', function () {
var applySafeguardsSpy = jest.spyOn(SafeSrcDocIframe.prototype, 'applySafeguards');
var wrapper = renderMountedSafeIframe();
expect(wrapper.instance().iframeElement.onload).toBeDefined();
wrapper.instance().iframeElement.onload();
expect(applySafeguardsSpy).toHaveBeenCalled();
});
it('will not apply safeguard styles if contentDocument does not exist', function () {
var wrapper = renderMountedSafeIframe();
var disableStyleTag = document.createElement('style');
expect(function () {
return wrapper.instance().applySafeguards.call({
iframeElement: {},
disableStyleTag: disableStyleTag
});
}).not.toThrow();
});
it('will not apply safeguard styles if contentDocument.body does not exist', function () {
var wrapper = renderMountedSafeIframe();
var disableStyleTag = document.createElement('style');
var mockContentDocument = {
getElementsByTagName: jest.fn().mockReturnValue([])
};
expect(function () {
return wrapper.instance().applySafeguards.call({
iframeElement: {
contentDocument: mockContentDocument
},
disableStyleTag: disableStyleTag
});
}).not.toThrow();
expect(mockContentDocument.getElementsByTagName).toHaveBeenCalledWith('body');
});
it('will apply safeguard styles if contentDocument and contentDocument.body exists', function () {
var wrapper = renderMountedSafeIframe();
var mockBody = {
appendChild: jest.fn()
};
var mockContentDocument = {
getElementsByTagName: jest.fn().mockReturnValue([mockBody])
};
var disableStyleTag = document.createElement('style');
wrapper.instance().applySafeguards.call({
iframeElement: {
contentDocument: mockContentDocument
},
disableStyleTag: disableStyleTag
});
expect(mockBody.appendChild).toHaveBeenCalledWith(disableStyleTag);
});
it('will dereference the style tag and text node when the component will unmount', function () {
var wrapper = renderMountedSafeIframe();
expect(wrapper.instance().disableStyleTag).toBeDefined();
expect(wrapper.instance().disableStylesTextNode).toBeDefined();
wrapper.instance().componentWillUnmount();
expect(wrapper.instance().disableStyleTag).toBe(null);
expect(wrapper.instance().disableStylesTextNode).toBe(null);
wrapper.unmount();
});
});
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React from 'react';\nimport { shallow, mount } from 'enzyme';\nimport SafeSrcDocIframe from './safe-src-doc-iframe';\n\ndescribe('<SafeSrcDocIframe />', () => {\n  const mockDocument = `\n  <!DOCTYPE html>\n  <html>\n    <head></head>\n    <body>\n      mock html page\n    </body>\n  </html>\n  `;\n\n  const testIframe = () => <SafeSrcDocIframe title='some-title' srcDoc={ mockDocument } />;\n\n  const renderShallowSafeframe = () => {\n    return shallow(testIframe());\n  };\n\n  const renderMountedSafeIframe = () => {\n    return mount(testIframe());\n  };\n\n  beforeEach(() => {\n    jest.clearAllMocks();\n  });\n  it('renders as expected', () => {\n    expect(\n      renderShallowSafeframe()\n    ).toMatchSnapshot();\n  });\n  it('will not configure onload for iframe during componentDidMount if ref does not exist', () => {\n    const wrapper = renderMountedSafeIframe();\n    expect(() =>\n      wrapper.instance().componentDidMount.call({})\n    ).not.toThrow();\n  });\n  it('will configure onload for iframe', () => {\n    const applySafeguardsSpy = jest.spyOn(\n      SafeSrcDocIframe.prototype,\n      'applySafeguards'\n    );\n    const wrapper = renderMountedSafeIframe();\n    expect(wrapper.instance().iframeElement.onload).toBeDefined();\n    wrapper.instance().iframeElement.onload();\n    expect(applySafeguardsSpy).toHaveBeenCalled();\n  });\n  it('will not apply safeguard styles if contentDocument does not exist', () => {\n    const wrapper = renderMountedSafeIframe();\n    const disableStyleTag = document.createElement('style');\n    expect(() =>\n      wrapper.instance().applySafeguards.call({\n        iframeElement: {},\n        disableStyleTag\n      })\n    ).not.toThrow();\n  });\n  it('will not apply safeguard styles if contentDocument.body does not exist', () => {\n    const wrapper = renderMountedSafeIframe();\n    const disableStyleTag = document.createElement('style');\n    const mockContentDocument = {\n      getElementsByTagName: jest.fn().mockReturnValue([])\n    };\n    expect(() =>\n      wrapper.instance().applySafeguards.call({\n        iframeElement: {\n          contentDocument: mockContentDocument\n        },\n        disableStyleTag\n      })\n    ).not.toThrow();\n    expect(mockContentDocument.getElementsByTagName).toHaveBeenCalledWith(\n      'body'\n    );\n  });\n  it('will apply safeguard styles if contentDocument and contentDocument.body exists', () => {\n    const wrapper = renderMountedSafeIframe();\n    const mockBody = {\n      appendChild: jest.fn()\n    };\n    const mockContentDocument = {\n      getElementsByTagName: jest.fn().mockReturnValue([mockBody])\n    };\n    const disableStyleTag = document.createElement('style');\n    wrapper.instance().applySafeguards.call({\n      iframeElement: {\n        contentDocument: mockContentDocument\n      },\n      disableStyleTag\n    });\n    expect(mockBody.appendChild).toHaveBeenCalledWith(disableStyleTag);\n  });\n  it('will dereference the style tag and text node when the component will unmount', () => {\n    const wrapper = renderMountedSafeIframe();\n    expect(wrapper.instance().disableStyleTag).toBeDefined();\n    expect(wrapper.instance().disableStylesTextNode).toBeDefined();\n    wrapper.instance().componentWillUnmount();\n    expect(wrapper.instance().disableStyleTag).toBe(null);\n    expect(wrapper.instance().disableStylesTextNode).toBe(null);\n    wrapper.unmount();\n  });\n});\n"]}