[英]Mocha unit tests and assertions in `for`loop
我正在研究Gulp插件,該插件允許使用以不同於英語的語言編寫的保留字來編寫JavaScript代碼-它的主要作用是翻譯,但這不是我要的。
用Mocha和Should.js編寫單元測試,我注意到我不能像這樣使用for
循環:
describe('Proper translating JavaScript PL into JavaScript', function () {
var asserts = [
{
passed: '(tak || nie) && (prawda || fałsz)',
expected: '(true || false) && (true || false)'
},
{
passed: 'jeśli (tak) { jeżeli (prawda) {}}',
expected: 'if (true) { if (true) {}}'
},
{
passed: 'przez (zm i = 1; i <= 3; console.log(i++));',
expected: 'for (var i = 1; i <= 3; console.log(i++));'
},
{
passed: 'zm sum = funkcja (a, b) { zwróć a + b; };',
expected: 'var sum = function (a, b) { return a + b; };'
},
{
passed: 'generator snowball() { zm a = 1; dostarcz a++; }',
expected: 'function* snowball() { var a = 1; yield a++; }'
},
{
passed: 'lol',
expected: 'zap'
}
];
for (var i = 0, l = asserts.length; i < l; i++) {
var assert = asserts[i];
var desc = 'should turn `' + assert.passed + '` into `' + assert.expected + '`';
it(desc, function (done) {
tester(assert.passed, assert.expected, done);
});
}
});
當我執行上述操作時,一個錯誤被聲明為failing
次數與聲明次數相同。
如您所見,盡管有2個錯誤,但我們還是有6個失敗。此外,這里僅提及其中一個。
我不想重復描述如下語句:
describe('Proper translating JavaScript PL into JavaScript', function () {
var asserts = [
{
passed: '(tak || nie) && (prawda || fałsz)',
expected: '(true || false) && (true || false)'
},
{
passed: 'jeśli (tak) { jeżeli (prawda) {}}',
expected: 'if (true) { if (true) {}}'
},
{
passed: 'przez (zm i = 1; i <= 3; console.log(i++));',
expected: 'for (var i = 1; i <= 3; console.log(i++));'
},
{
passed: 'zm sum = funkcja (a, b) { zwróć a + b; };',
expected: 'var sum = function (a, b) { return a + b; };'
},
{
passed: 'generator snowball() { zm a = 1; dostarcz a++; }',
expected: 'function* snowball() { var a = 1; yield a++; }'
},
{
passed: 'lol',
expected: 'zap'
}
];
it('should be kicking 1', function (done) {
tester(asserts[0].passed, asserts[0].expected, done);
});
it('should be kicking 2', function (done) {
tester(asserts[1].passed, asserts[1].expected, done);
});
it('should be kicking 3', function (done) {
tester(asserts[2].passed, asserts[2].expected, done);
});
it('should be kicking 4', function (done) {
tester(asserts[3].passed, asserts[3].expected, done);
});
it('should be kicking 5', function (done) {
tester(asserts[4].passed, asserts[4].expected, done);
});
it('should be kicking 6', function (done) {
tester(asserts[5].passed, asserts[5].expected, done);
});
});
這些should be kicking N
沒關系-我一直懶於寫類似的東西:
it('should turn `(tak || nie) && (prawda || fałsz)` into `(true || false) && (true || false)`', function (done) {
tester('(tak || nie) && (prawda || fałsz)', '(true || false) && (true || false)', done);
});
無論如何,進行獨立的斷言測試可以。
在這兩種情況下,前5個測試均成功,在這里我們根本不考慮它們。 我們關注的測試是這6個放入asserts
。
在單獨的it()
進行測試可以正常進行。 在for
循環中for
測試,一個失敗使asserts.length
失敗,另外一個失敗使其他未看到。
將代碼包裝在閉包中:
for (var i = 0, l = asserts.length; i < l; i++) {
(function(n) {
var assert = asserts[n];
var desc = 'should turn `' + assert.passed + '` into `' + assert.expected + '`';
it(desc, function (done) {
tester(assert.passed, assert.expected, done);
});
})(i);
}
或使用asserts.forEach
。
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