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node_modules/shimmer/test/unwrap.tap.js
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'use strict'
var tap = require('tap')
var test = tap.test
var sinon = require('sinon')
var shimmer = require('../index.js')
var outsider = 0
function counter () { return ++outsider }
var generator = {
inc: counter
}
test('should unwrap safely', function (t) {
t.plan(9)
t.equal(counter, generator.inc, 'basic function equality testing should work')
t.doesNotThrow(function () { generator.inc() })
t.equal(1, outsider, 'calls have side effects')
function wrapper (original) {
return function () {
return original.apply(this, arguments)
}
}
shimmer.wrap(generator, 'inc', wrapper)
t.doesNotEqual(counter, generator.inc, 'function should be wrapped')
t.doesNotThrow(function () { generator.inc() })
t.equal(2, outsider, 'original function has still been called')
shimmer.unwrap(generator, 'inc')
t.equal(counter, generator.inc, 'basic function equality testing should work')
t.doesNotThrow(function () { generator.inc() })
t.equal(3, outsider, 'original function has still been called')
})
test("shouldn't throw on double unwrapping", function (t) {
t.plan(6)
t.equal(counter, generator.inc, 'basic function equality testing should work')
var mock = sinon.expectation
.create('logger')
.withArgs('no original to unwrap to -- ' +
'has inc already been unwrapped?')
.once()
shimmer({logger: mock})
function wrapper (original) {
return function () {
return original.apply(this, arguments)
}
}
shimmer.wrap(generator, 'inc', wrapper)
t.doesNotEqual(counter, generator.inc, 'function should be wrapped')
shimmer.unwrap(generator, 'inc')
t.equal(counter, generator.inc, 'basic function equality testing should work')
t.doesNotThrow(function () { shimmer.unwrap(generator, 'inc') },
'should double unwrap without issue')
t.equal(counter, generator.inc, 'function is unchanged after unwrapping')
t.doesNotThrow(function () {
mock.verify()
}, 'logger was called with the expected message')
})
test('unwrap called with no arguments', function (t) {
t.plan(2)
var mock = sinon.expectation
.create('logger')
.twice()
shimmer({logger: mock})
t.doesNotThrow(function () { shimmer.unwrap() }, 'should log instead of throwing')
t.doesNotThrow(function () {
mock.verify()
}, 'logger was called with the expected message')
})
test('unwrap called with module but no name', function (t) {
t.plan(2)
var mock = sinon.expectation
.create('logger')
.twice()
shimmer({logger: mock})
t.doesNotThrow(function () { shimmer.unwrap({}) }, 'should log instead of throwing')
t.doesNotThrow(function () {
mock.verify()
}, 'logger was called with the expected message')
})
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