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diff --git a/src/fauxton/test/mocha/sinon-chai.js b/src/fauxton/test/mocha/sinon-chai.js
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--- a/src/fauxton/test/mocha/sinon-chai.js
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-(function (sinonChai) {
- "use strict";
-
- // Module systems magic dance.
-
- if (typeof require === "function" && typeof exports === "object" && typeof module === "object") {
- // NodeJS
- module.exports = sinonChai;
- } else if (typeof define === "function" && define.amd) {
- // AMD
- define(function () {
- return sinonChai;
- });
- } else {
- // Other environment (usually <script> tag): plug in to global chai instance directly.
- chai.use(sinonChai);
- }
-}(function sinonChai(chai, utils) {
- "use strict";
-
- var slice = Array.prototype.slice;
-
- function isSpy(putativeSpy) {
- return typeof putativeSpy === "function" &&
- typeof putativeSpy.getCall === "function" &&
- typeof putativeSpy.calledWithExactly === "function";
- }
-
- function isCall(putativeCall) {
- return putativeCall && isSpy(putativeCall.proxy);
- }
-
- function assertCanWorkWith(assertion) {
- if (!isSpy(assertion._obj) && !isCall(assertion._obj)) {
- throw new TypeError(utils.inspect(assertion._obj) + " is not a spy or a call to a spy!");
- }
- }
-
- function getMessages(spy, action, nonNegatedSuffix, always, args) {
- var verbPhrase = always ? "always have " : "have ";
- nonNegatedSuffix = nonNegatedSuffix || "";
- if (isSpy(spy.proxy)) {
- spy = spy.proxy;
- }
-
- function printfArray(array) {
- return spy.printf.apply(spy, array);
- }
-
- return {
- affirmative: printfArray(["expected %n to " + verbPhrase + action + nonNegatedSuffix].concat(args)),
- negative: printfArray(["expected %n to not " + verbPhrase + action].concat(args))
- };
- }
-
- function sinonProperty(name, action, nonNegatedSuffix) {
- utils.addProperty(chai.Assertion.prototype, name, function () {
- assertCanWorkWith(this);
-
- var messages = getMessages(this._obj, action, nonNegatedSuffix, false);
- this.assert(this._obj[name], messages.affirmative, messages.negative);
- });
- }
-
- function createSinonMethodHandler(sinonName, action, nonNegatedSuffix) {
- return function () {
- assertCanWorkWith(this);
-
- var alwaysSinonMethod = "always" + sinonName[0].toUpperCase() + sinonName.substring(1);
- var shouldBeAlways = utils.flag(this, "always") && typeof this._obj[alwaysSinonMethod] === "function";
- var sinonMethod = shouldBeAlways ? alwaysSinonMethod : sinonName;
-
- var messages = getMessages(this._obj, action, nonNegatedSuffix, shouldBeAlways, slice.call(arguments));
- this.assert(this._obj[sinonMethod].apply(this._obj, arguments), messages.affirmative, messages.negative);
- };
- }
-
- function sinonMethodAsProperty(name, action, nonNegatedSuffix) {
- var handler = createSinonMethodHandler(name, action, nonNegatedSuffix);
- utils.addProperty(chai.Assertion.prototype, name, handler);
- }
-
- function exceptionalSinonMethod(chaiName, sinonName, action, nonNegatedSuffix) {
- var handler = createSinonMethodHandler(sinonName, action, nonNegatedSuffix);
- utils.addMethod(chai.Assertion.prototype, chaiName, handler);
- }
-
- function sinonMethod(name, action, nonNegatedSuffix) {
- exceptionalSinonMethod(name, name, action, nonNegatedSuffix);
- }
-
- utils.addProperty(chai.Assertion.prototype, "always", function () {
- utils.flag(this, "always", true);
- });
-
- sinonProperty("called", "been called", " at least once, but it was never called");
- sinonProperty("calledOnce", "been called exactly once", ", but it was called %c%C");
- sinonProperty("calledTwice", "been called exactly twice", ", but it was called %c%C");
- sinonProperty("calledThrice", "been called exactly thrice", ", but it was called %c%C");
- sinonMethodAsProperty("calledWithNew", "been called with new");
- sinonMethod("calledBefore", "been called before %1");
- sinonMethod("calledAfter", "been called after %1");
- sinonMethod("calledOn", "been called with %1 as this", ", but it was called with %t instead");
- sinonMethod("calledWith", "been called with arguments %*", "%C");
- sinonMethod("calledWithExactly", "been called with exact arguments %*", "%C");
- sinonMethod("calledWithMatch", "been called with arguments matching %*", "%C");
- sinonMethod("returned", "returned %1");
- exceptionalSinonMethod("thrown", "threw", "thrown %1");
-}));