jest-preset-angular
Version:
Jest preset configuration for Angular projects
58 lines (57 loc) • 2.35 kB
JavaScript
;
const pretty_format_1 = require("pretty-format");
const jestDOMElementSerializer = pretty_format_1.plugins.DOMElement;
const attributesToRemovePatterns = ['ng-reflect', '_nghost', '_ngcontent', 'ng-version'];
const attributesToClean = {
class: [/^(?:mat|cdk|ng).*-\w*\d+-\d+$/, /^ng-star-inserted$/],
id: [/^(?:mat|cdk|ng).*-\d+$/],
for: [/^(?:mat|cdk|ng).*-\d+$/],
'aria-owns': [/^(?:mat|cdk|ng).*-\d+$/],
'aria-labelledby': [/^(?:mat|cdk|ng).*-\d+$/],
'aria-controls': [/^(?:mat|cdk|ng).*-\d+$/],
};
const hasAttributesToRemove = (attribute) => attributesToRemovePatterns.some((removePattern) => attribute.name.startsWith(removePattern));
const hasAttributesToClean = (attribute) => Object.keys(attributesToClean).some((removePatternKey) => attribute.name === removePatternKey);
const removeAngularAttributes = (node) => {
const nodeCopy = node.cloneNode(true);
Object.values(nodeCopy.attributes)
.filter(hasAttributesToRemove)
.forEach((attribute) => nodeCopy.attributes.removeNamedItem(attribute.name));
return nodeCopy;
};
const cleanAngularClasses = (node) => {
const nodeCopy = node.cloneNode(true);
Object.values(nodeCopy.attributes)
.filter(hasAttributesToClean)
.forEach((attribute) => {
attribute.value = attribute.value
.split(' ')
.filter((attrValue) => !attributesToClean[attribute.name].some((attributeCleanRegex) => attributeCleanRegex.test(attrValue)))
.join(' ');
if (attribute.value === '') {
nodeCopy.attributes.removeNamedItem(attribute.name);
}
else {
nodeCopy.attributes.setNamedItem(attribute);
}
});
return nodeCopy;
};
const shouldSerializeElement = (val) => {
return Object.values(val.attributes).some((attribute) => hasAttributesToRemove(attribute) || hasAttributesToClean(attribute));
};
const serialize = (node, ...rest) => {
let nodeCopy = removeAngularAttributes(node);
nodeCopy = cleanAngularClasses(nodeCopy);
return jestDOMElementSerializer.serialize(nodeCopy, ...rest);
};
const test = (val) => {
if (!val || !(val instanceof Element)) {
return false;
}
return jestDOMElementSerializer.test(val) && shouldSerializeElement(val);
};
module.exports = {
serialize,
test,
};