97 lines
2.8 KiB
JavaScript
97 lines
2.8 KiB
JavaScript
import pixelmatch from 'pixelmatch';
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export default {
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toContainText: () => ({
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compare(vm, text) {
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if (!(vm.$el instanceof HTMLElement)) {
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throw new Error('vm.$el is not a DOM element!');
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}
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const result = {
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pass: vm.$el.innerText.includes(text),
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};
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return result;
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},
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}),
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toHaveSpriteIcon: () => ({
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compare(element, iconName) {
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if (!iconName) {
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throw new Error('toHaveSpriteIcon is missing iconName argument!');
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}
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if (!(element instanceof HTMLElement)) {
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throw new Error(`${element} is not a DOM element!`);
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}
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const iconReferences = [].slice.apply(element.querySelectorAll('svg use'));
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const matchingIcon = iconReferences.find(reference =>
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reference.getAttribute('xlink:href').endsWith(`#${iconName}`),
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);
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const result = {
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pass: Boolean(matchingIcon),
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};
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if (result.pass) {
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result.message = `${element.outerHTML} contains the sprite icon "${iconName}"!`;
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} else {
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result.message = `${element.outerHTML} does not contain the sprite icon "${iconName}"!`;
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const existingIcons = iconReferences.map(reference => {
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const iconUrl = reference.getAttribute('xlink:href');
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return `"${iconUrl.replace(/^.+#/, '')}"`;
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});
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if (existingIcons.length > 0) {
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result.message += ` (only found ${existingIcons.join(',')})`;
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}
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}
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return result;
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},
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}),
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toRender: () => ({
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compare(vm) {
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const result = {
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pass: vm.$el.nodeType !== Node.COMMENT_NODE,
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};
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return result;
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},
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}),
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toImageDiffEqual: () => {
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const getImageData = img => {
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const canvas = document.createElement('canvas');
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canvas.width = img.width;
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canvas.height = img.height;
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canvas.getContext('2d').drawImage(img, 0, 0);
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return canvas.getContext('2d').getImageData(0, 0, img.width, img.height).data;
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};
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return {
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compare(actual, expected, threshold = 0.1) {
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if (actual.height !== expected.height || actual.width !== expected.width) {
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return {
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pass: false,
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message: `Expected image dimensions (h x w) of ${expected.height}x${expected.width}.
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Received an image with ${actual.height}x${actual.width}`,
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};
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}
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const { width, height } = actual;
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const differentPixels = pixelmatch(
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getImageData(actual),
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getImageData(expected),
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null,
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width,
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height,
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{ threshold },
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);
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return {
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pass: differentPixels < 20,
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message: `${differentPixels} pixels differ more than ${threshold *
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100} percent between input and output.`,
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};
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},
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};
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},
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};
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