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Copy pathchai-helpers.js
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50 lines (41 loc) · 1.51 KB
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"use strict";
const exceptionTable = require("../lib/jsdom/web-idl/dom-exception-table.json");
module.exports = (chai, util) => {
const assert = chai.assert;
const Assertion = chai.Assertion;
const flag = util.flag;
assert.throwsDomException = function (fn, document, name, msg) {
const assertErr = new Assertion(fn, msg).to.throwDomException(document, name);
return flag(assertErr, "object");
};
Assertion.addMethod("throwDomException", function (document, name, message) {
if (message) {
flag(this, "message", message);
}
const fn = flag(this, "object");
const expectedCode = exceptionTable[name].legacyCodeValue;
new Assertion(fn, message).is.a("function");
let thrownError = null;
try {
fn();
} catch (error) {
thrownError = error;
}
this.assert(
thrownError &&
thrownError instanceof document.defaultView.DOMException &&
thrownError.name === name &&
thrownError.code === expectedCode,
`expected #{this} to throw a window.DOMException with name '${name}' and code '${expectedCode}' but ` +
(thrownError ?
`#{act} was thrown with name '${thrownError.name}' and code '${thrownError.code}'` :
`nothing was thrown`)
,
`expected #{this} to not throw a window.DOMException with name '${name}' and code '${expectedCode}'`,
"window.DOMException",
(thrownError instanceof Error ? thrownError.toString() : thrownError)
);
// for chaining
flag(this, "object", thrownError);
});
};