Data Providers

This is a concept used in phpunit(i assume junit too since phpunit was inspired by junit). Basically every test within a test case has an optional data provider that gets linked up to it if available. PHPUnit does this through reflection since there isn't any good reflection implementations for javascript that I know of i think using convention is appropriate. Here's my proposal:

``` javascript
exports = testCase({
'provider test1':function(){
return [
[foo,bar],//test1
[baz,gah],//test2
]

},
'test test1':function(test,value,expected){
if(value == 'foo') test.equal('bar',expected);
else if(value == 'baz') test.equal('baz',expected);

}

});

```

The nuance of the above code is the 'test test1' is run twice once passing 'foo' and 'bar' and then again passing 'baz' and 'gah'. You could write multiple test cases to support each row in the data provider but that gets a little verbose and this method is cleaner i think.

This obviously has API implications, and certain conventions would have to be adopted, so I wanted to have a discussion before looking into implementations. Sorry if this has been discussed, or has a current implementation i didn't see any.

Bắt đầu bằng cách xem xét quy ước `testCase` provider được đề xuất và ví dụ `provider test1`/`test test1`. Issue hiện đang là một cuộc thảo luận về thiết kế; để hoàn tất, cần thống nhất API và phạm vi triển khai trước khi có thể bắt đầu viết code.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.