SinonJS with Mocha

Setup

Fakes, spies and stubs are created in the default sandbox which needs to be restored after each test to prevent memory leaks. We use a Mocha hook plugin for that:

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// Restores the default sandbox after every test
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exports.mochaHooks = {
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  afterEach() {
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    sinon.restore();
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  },
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};

Types of test doubles

| Type | What it does | Behavior | Pre-programmed behavior | Pre-programmed expectations | When to use | |