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.

まず、提案されている `testCase` provider の規約と、`provider test1`/`test test1` の例を確認してください。現在、この issue は設計に関する議論の段階です。完了とするには、コーディングを開始する前に、合意された API と実装範囲が必要です。

索引モデルが issue の本文から書いたものです。