HttpRunner接口自动化测试框架--3.2validate详细描述

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')