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59 lines
1.7 KiB
59 lines
1.7 KiB
const __NULL__ = { notExist: true };
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export function spyElementPrototypes(Element, properties) {
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const propNames = Object.keys(properties);
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const originDescriptors = {};
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propNames.forEach(propName => {
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const originDescriptor = Object.getOwnPropertyDescriptor(Element.prototype, propName);
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originDescriptors[propName] = originDescriptor || __NULL__;
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const spyProp = properties[propName];
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if (typeof spyProp === 'function') {
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// If is a function
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Element.prototype[propName] = function spyFunc(...args) {
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return spyProp.call(this, originDescriptor, ...args);
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};
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} else {
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// Otherwise tread as a property
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Object.defineProperty(Element.prototype, propName, {
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...spyProp,
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set(value) {
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if (spyProp.set) {
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return spyProp.set.call(this, originDescriptor, value);
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}
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return originDescriptor.set(value);
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},
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get() {
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if (spyProp.get) {
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return spyProp.get.call(this, originDescriptor);
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}
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return originDescriptor.get();
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},
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});
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}
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});
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return {
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mockRestore() {
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propNames.forEach(propName => {
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const originDescriptor = originDescriptors[propName];
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if (originDescriptor === __NULL__) {
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delete Element.prototype[propName];
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} else if (typeof originDescriptor === 'function') {
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Element.prototype[propName] = originDescriptor;
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} else {
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Object.defineProperty(Element.prototype, propName, originDescriptor);
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}
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});
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},
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};
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}
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export function spyElementPrototype(Element, propName, property) {
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return spyElementPrototypes(Element, {
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[propName]: property,
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});
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}
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