jack-chai

Synopsis

Chai.js assertions for Jack.js test doubles

Usage

``js
// subject:

var out = {
test: function() {},
other: function() {}
};

// test double

jack(out, 'test');
`

#### testDouble

Verify that a function is a test double.

`js
expect(out.test).to.be.a.testDouble();
out.test.should.be.a.testDouble();

expect(out.none).to.not.be.a.testDouble();
out.other.should.not.be.a.testDouble();
`

#### invoke

Verify that a test double has been invoked.

`js
expect(out.test).to.have.been.invoked();
expect(out.test).invoked();

out.test.should.have.been.invoked();

expect(out.other).to.have.not.been.invoked();
expect(out.other).invoked();

out.other.should.have.not.been.invoked();
`

#### max

Verify that a test double has been called max n times.

`js
expect(out.test).to.have.been.called.max(1);
out.test.should.have.been.called.max(1);
`

#### min

Verify that a test double has been called min n times.

`js
expect(out.test).to.have.been.called.min(42);
expect(out.test).to.have.been.called.min(42).times;

out.test.should.have.been.called.min(42);
out.test.should.have.been.called.min(42).times;
`

#### exactly

Verify that a test double has been called exactly n times.

`js
expect(out.test).to.have.been.called.exactly(42).times;
expect(out.test).to.have.been.called.exactly(42);

out.test.should.have.been.called.exactly(42);
out.test.should.have.been.called.exactly(42).times;
`

#### once

Verify that a test double has been called exactly once.

`js
expect(out.test).to.have.been.called.once();

out.test.should.have.been.called.once();
`

#### twice

Verify that a test double has been called exactly twice.

`js
expect(out.test).to.have.been.called.twice();

out.test.should.have.been.called.twice();
`

#### on

Verify that a test double has been called on given context.

`js
expect(out.test).to.have.been.called.on(ctx);

out.test.should.have.been.called.on(ctx);

expect(out.test).to.have.not.been.called.on(ctx);

out.test.should.have.not.been.called.on(ctx);
`

#### args

Verify that a test double has been called with given arguments.

`js
expect(out.test).to.have.been.called.with.args('foo', 'bar', 42);

out.test.should.have.been.called.with.args('foo', 'bar', 42);

expect(out.test).to.have.not.been.called.with.args('foo', 'bar', 42);

out.test.should.have.not.been.called.with.args('foo', 'bar', 42);
`

Installation

npm:

`bash
npm install jack-chai
`

component:

`bash
component install jackjs/jack-chai
`

Standalone:

`html