122 lines
3.9 KiB
JavaScript
122 lines
3.9 KiB
JavaScript
'use strict'
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var tap = require('tap')
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var test = tap.test
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var sinon = require('sinon')
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var shimmer = require('../index.js')
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var outsider = 0
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function counter () { return ++outsider }
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function anticounter () { return --outsider }
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var generator = {
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inc: counter,
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dec: anticounter
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}
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test('should unwrap safely', function (t) {
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t.plan(18)
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t.equal(counter, generator.inc, 'basic function equality testing should work')
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t.equal(anticounter, generator.dec, 'basic function equality testing should work')
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t.doesNotThrow(function () { generator.inc() })
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t.equal(1, outsider, 'calls have side effects')
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t.doesNotThrow(function () { generator.dec() })
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t.equal(0, outsider, 'calls have side effects')
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function wrapper (original) {
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return function () {
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return original.apply(this, arguments)
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}
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}
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shimmer.massWrap(generator, ['inc', 'dec'], wrapper)
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t.doesNotEqual(counter, generator.inc, 'function should be wrapped')
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t.doesNotEqual(anticounter, generator.dec, 'function should be wrapped')
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t.doesNotThrow(function () { generator.inc() })
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t.equal(1, outsider, 'original function has still been called')
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t.doesNotThrow(function () { generator.dec() })
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t.equal(0, outsider, 'original function has still been called')
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shimmer.massUnwrap(generator, ['inc', 'dec'])
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t.equal(counter, generator.inc, 'basic function equality testing should work')
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t.equal(anticounter, generator.dec, 'basic function equality testing should work')
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t.doesNotThrow(function () { generator.inc() })
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t.equal(1, outsider, 'original function has still been called')
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t.doesNotThrow(function () { generator.dec() })
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t.equal(0, outsider, 'original function has still been called')
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})
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test("shouldn't throw on double unwrapping", function (t) {
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t.plan(10)
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t.equal(counter, generator.inc, 'basic function equality testing should work')
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t.equal(anticounter, generator.dec, 'basic function equality testing should work')
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var mock = sinon.stub()
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shimmer({ logger: mock })
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function wrapper (original) {
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return function () {
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return original.apply(this, arguments)
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}
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}
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shimmer.wrap(generator, 'inc', wrapper)
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shimmer.wrap(generator, 'dec', wrapper)
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t.doesNotEqual(counter, generator.inc, 'function should be wrapped')
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t.doesNotEqual(anticounter, generator.dec, 'function should be wrapped')
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shimmer.massUnwrap(generator, ['inc', 'dec'])
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t.equal(counter, generator.inc, 'basic function equality testing should work')
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t.equal(anticounter, generator.dec, 'basic function equality testing should work')
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t.doesNotThrow(function () { shimmer.massUnwrap(generator, ['inc', 'dec']) },
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'should double unwrap without issue')
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t.equal(counter, generator.inc, 'function is unchanged after unwrapping')
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t.equal(anticounter, generator.dec, 'function is unchanged after unwrapping')
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t.doesNotThrow(function () {
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sinon.assert.calledWith(mock, 'no original to unwrap to -- ' +
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'has inc already been unwrapped?')
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sinon.assert.calledWith(mock, 'no original to unwrap to -- ' +
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'has dec already been unwrapped?')
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sinon.assert.calledTwice(mock)
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}, 'logger was called with the expected message')
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})
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test('massUnwrap called with no arguments', function (t) {
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t.plan(2)
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var mock = sinon.expectation
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.create('logger')
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.twice()
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shimmer({ logger: mock })
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t.doesNotThrow(function () { shimmer.massUnwrap() }, 'should log instead of throwing')
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t.doesNotThrow(function () {
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mock.verify()
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}, 'logger was called with the expected message')
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})
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test('massUnwrap called with module but nothing else', function (t) {
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t.plan(2)
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var mock = sinon.expectation
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.create('logger')
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.withExactArgs('must provide one or more functions to unwrap on modules')
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.once()
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shimmer({ logger: mock })
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t.doesNotThrow(function () {
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shimmer.massUnwrap(generator)
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}, "wrapping with only 1 argument doesn't throw")
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t.doesNotThrow(function () {
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mock.verify()
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}, 'logger was called with the expected message')
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})
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