43 lines
1.9 KiB
JavaScript
43 lines
1.9 KiB
JavaScript
import * as React from 'react';
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import { mount } from 'enzyme';
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/**
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* Validate that value(s) returned by a hook do not change in identity.
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* @param testDescription - Custom test description
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* @param useHook - Function to invoke the hook and return an array of return values which
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* should not change
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* @param useHookAgain - If you want to verify that the return value doesn't change when hook
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* parameters change, you can pass this second callback which calls the hook differently.
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*/
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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export function validateHookValueNotChanged(testDescription, useHook, useHookAgain) {
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it(testDescription || 'returns the same value(s) each time', function () {
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var latestValues;
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var callCount = 0;
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var TestComponent = function () {
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callCount++;
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// eslint-disable-next-line react-hooks/rules-of-hooks
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latestValues = callCount === 1 ? useHook() : (useHookAgain || useHook)();
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return React.createElement("div", null);
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};
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var wrapper = mount(React.createElement(TestComponent, null));
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expect(callCount).toBe(1);
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var firstValues = latestValues;
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expect(firstValues).toBeDefined();
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latestValues = undefined;
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wrapper.setProps({});
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expect(callCount).toBe(2);
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expect(latestValues).toBeDefined();
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expect(latestValues).toHaveLength(firstValues.length);
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for (var i = 0; i < latestValues.length; i++) {
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try {
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expect(latestValues[i]).toBe(firstValues[i]);
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}
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catch (err) {
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// Make a more informative error message
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var valueText = latestValues[i].toString();
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expect('').toBe("Identity of value at index ".concat(i, " has changed. This might help identify it:\n").concat(valueText));
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}
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}
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});
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}
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//# sourceMappingURL=testUtilities.js.map
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