测试用例中定义的结果校验项，作用域为当前测试用例，用于实现对当前测试用例运行结果的校验
校验的详细描述：
|
No.
|
Comparator
|
Description
|
A(check), B(expect)
|
|---|---|---|---|
| 1 | eq | value is equal | A == B |
| 2 | lt | less than | A < B |
| 3 | le | less than or equals | A <=B |
| 4 | gt | greater than | A >B |
| 5 | ge | greater than or equals | A >=B |
| 6 | ne | not equals | A != B |
| 7 | str_eq | string equals | str(A) == str(B) |
| 8 | len_eq, count_eq | length or count equals | len(A) == B |
| 9 | len_gt,count_gt | length greater than | len(A) > B |
| 10 | len_ge,count_ge | length greater than or equals | len(A) >= B |
| 11 | len_lt, count_lt | length less than | len(A) < B |
| 12 | len_le, count_le | length less than or equals | len(A) <= B |
| 13 | contains | contains |
[1,2] contains 1 |
| 14 | contained_by | contained by | A in B |
| 15 | type_match | A is instance of B | isinstance(A, B) |
| 16 | regex_match | regex matches | re.match(B, A) |
| 17 | startwith | start with | A startwith(B) is True ('abc' startwith 'ab') |
| 18 | endswith | ends with | A endswith(B) is True ('abc' endswith 'bc') |