1-js/03-code-quality/05-testing-mocha (javascript-tutorial#39)

* first draft

resolve javascript-tutorial#21

* fix(testing-mocha): Adjust some contents

* fix: Adjust some words due to code review changes

Signed-off-by: sqrtthree <imsqrtthree@gmail.com>

* translate the remaining part

* Update article.md

Author: linhe0x0

1-js/03-code-quality/05-testing-mocha/3-pow-test-wrong/solution.md

@@ -1,14 +1,14 @@
-The test demonstrates one of the temptations a developer meets when writing tests.
+这些测试代码演示了开发人员在编写测试代码时遇到的一些疑惑。
 
-What we have here is actually 3 tests, but layed out as a single function with 3 asserts.
+我们这里实际上有三条测试，但是用了一个函数来放置 3 个断言语句。
 
-Sometimes it's easier to write this way, but if an error occurs, it's much less obvious what went wrong.
+有时用这种方式编写会更容易，但是如果发生错误，那么出错的情况就不那么明显了。
 
-If an error happens inside a complex execution flow, then we'll have to figure out the data at that point. We'll actually have to *debug the test*.
+如果在复杂的执行流程中发生了一个错误，那么我们必须在那找出数据。 我们实际上必须**调试测试**。
 
-It would be much better to break the test into multiple `it` blocks with clearly written inputs and outputs.
+将测试分成多个具有明确输入和输出的 `it` 代码块中会更好。
 
-Like this:
+像是这样：
 ```js
 describe("Raises x to power n", function() {
   it("5 in the power of 1 equals 5", function() {
@@ -25,9 +25,9 @@ describe("Raises x to power n", function() {
 });
 ```
 
-We replaced the single `it` with `describe` and a group of `it` blocks. Now if something fails we would see clearly what the data was.
+我们使用 `describe` 和一组 `it` 代码块替换掉了单个的 `it`。现在，如果某个测试失败了，我们会清楚地看到数据是什么。
 
-Also we can isolate a single test and run it in standalone mode by writing `it.only` instead of `it`:
+此外，我们可以通过编写`it.only` 而不是 `it` 来隔离单个测试并以独立模式运行它：
 
 
 ```js
@@ -37,7 +37,7 @@ describe("Raises x to power n", function() {
   });
 
 *!*
-  // Mocha will run only this block
+  // Mocha 将只运行这个代码块
   it.only("5 in the power of 2 equals 25", function() {
     assert.equal(pow(5, 2), 25);
   });

1-js/03-code-quality/05-testing-mocha/3-pow-test-wrong/task.md

@@ -2,9 +2,9 @@ importance: 5
 
 ---
 
-# What's wrong in the test?
+# 测试代码中有什么错误？
 
-What's wrong in the test of `pow` below?
+下面测试代码中的 `pow` 有什么错误？
 
 ```js
 it("Raises x to the power n", function() {
@@ -21,4 +21,4 @@ it("Raises x to the power n", function() {
 });
 ```
 
-P.S. Syntactically the test is correct and passes.
+附：从语法上来说这些测试代码是挣钱和能通过的。