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import React, { Component } from 'react';
import reactHotLoader from '../src/reactHotLoader';
import { areComponentsEqual, cold } from '../src/utils.dev';
import configuration from '../src/configuration';
import logger from '../src/logger';
reactHotLoader.patch(React);
jest.mock('../src/logger');
describe('utils (dev)', () => {
describe('areComponentsEqual', () => {
const createClasses = () => {
class Component1 extends Component {
render() {
return 42;
}
}
class Component2 extends Component {
render() {
return 43;
}
}
return { Component1, Component2 };
};
const createStateless = () => {
const Component1 = () => 42;
const Component2 = () => 43;
return { Component1, Component2 };
};
const testSuite = factory => {
it('should compare non-registred components', () => {
const { Component1, Component2 } = factory();
const element1 = <Component1 />;
const element2 = <Component2 />;
expect(Component1 === Component2).toBe(false);
expect(Component1 === element1.type).toBe(false);
expect(areComponentsEqual(Component1, element1.type)).toBe(true);
expect(areComponentsEqual(Component1, element2.type)).toBe(false);
});
it('should compare registered components', () => {
const { Component1, Component2 } = factory();
reactHotLoader.register(Component1, 'Class1', 'util.dev');
reactHotLoader.register(Component2, 'Class2', 'util.dev');
const element1 = <Component1 />;
const element2 = <Component2 />;
expect(Component1 === Component2).toBe(false);
expect(Component1 === element1.type).toBe(false);
expect(areComponentsEqual(Component1, element1.type)).toBe(true);
expect(areComponentsEqual(Component1, element2.type)).toBe(false);
});
};
describe('class based', () => testSuite(createClasses));
describe('function based', () => testSuite(createStateless));
});
describe('cold', () => {
it('should disable RHL for "cold" Components', () => {
const Component1 = () => <div>42</div>;
const Component2 = () => <div>42</div>;
reactHotLoader.register(Component1, 'Class1', 'util.dev');
reactHotLoader.register(Component2, 'Class2', 'util.dev');
cold(Component1);
const element1 = <Component1 />;
const element2 = <Component2 />;
expect(Component1 === element1.type).toBe(true);
expect(Component2 === element2.type).toBe(false);
expect(areComponentsEqual(Component1, element1.type)).toBe(true);
expect(areComponentsEqual(Component2, element2.type)).toBe(true);
});
it('should components by fileName', () => {
const Component1 = () => <div>42</div>;
const Component2 = () => <div>42</div>;
configuration.onComponentRegister = (type, name, file) => {
if (file === 'oneFile') cold(type);
};
reactHotLoader.register(Component1, 'Class1', 'oneFile');
reactHotLoader.register(Component2, 'Class2', 'anotherFile');
const element1 = <Component1 />;
const element2 = <Component2 />;
expect(Component1 === element1.type).toBe(true);
expect(Component2 === element2.type).toBe(false);
expect(areComponentsEqual(Component1, element1.type)).toBe(true);
expect(areComponentsEqual(Component2, element2.type)).toBe(true);
});
it('should report on cold update', () => {
const Component1 = () => <div>42</div>;
const Component2 = () => <div>42</div>;
cold(Component1);
// cold(Component2)
reactHotLoader.register(Component1, 'Cold', 'Winter');
reactHotLoader.register(Component1, 'Cold', 'Winter');
// first registration is expected
expect(logger.error).not.toHaveBeenCalled();
reactHotLoader.register(Component2, 'Cold', 'Winter');
expect(logger.error).toHaveBeenCalledWith(
`React-hot-loader: Cold component`,
'Cold',
'at',
'Winter',
'has been updated',
);
});
});
});
|
