我使用一些单元测试来检查正则表达式.
@implementation Nsstring (regexMatch)- (BOol)matchesRegex:(Nsstring *)regexPattern{ NSError *error = nil; NSRegularExpression* regex = [NSRegularExpression regularExpressionWithPattern:regexPattern options:NSRegularExpressionSearch error:&error]; if(error) { NSLog(@"Error on maches regex: %@ on %@: %@",regex,self,error); return NO; } NSUInteger maches = [regex numberOfMatchesInString:self options:NSRegularExpressionSearch range:NSMakeRange(0,[self length])]; return (maches > 0);}@end
正则表达式:
const static Nsstring *REGEX_VALID_PASS = @"(^((?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[-_,.@#$%'\"]).{6,20})$)";
单元测试:
//Password // At least:// - between 6 and 20 chars// - a cAPItal character// - a small character// - a digit// - a special char: - _,. @ # $% ´ 'STAssertTrue([@"Pass1-" matchesRegex:REGEX_VALID_PASS],@"Password 1 Failed");STAssertTrue([@"aPrettyLongPassw0rd@" matchesRegex:REGEX_VALID_PASS],@"Password 2 Failed");STAssertTrue([@"Pw987321-_,.@#$%'`" matchesRegex:REGEX_VALID_PASS],@"Password 3 Failed");//Returns TRUE ???STAssertFalse([@"password1@" matchesRegex:REGEX_VALID_PASS],@"Wrong password 4 works (No cAPItal letter)");//Returns TRUE ???STAssertFalse([@"PASSWORD2#" matchesRegex:REGEX_VALID_PASS],@"Wrong password 5 works (No small letter)");STAssertFalse([@"Password8" matchesRegex:REGEX_VALID_PASS],@"Wrong password 6 works (No special letter)");STAssertFalse([@"Password$" matchesRegex:REGEX_VALID_PASS],@"Wrong password 7 works (No digit letter)");STAssertFalse([@"PrettyLongPasswordisWrong123#" matchesRegex:REGEX_VALID_PASS],@"Wrong password 8 works (> 20)");STAssertFalse([@"Pw@3" matchesRegex:REGEX_VALID_PASS],@"Wrong password 9 works (< 6)");
密码’password1 @’和’PASSWORD2#’返回TRUE但不正确.
错误:
file://localhost/Users/user/app/AppTest.m: error: testRegex (AppTest) Failed: "[@"password1@" matchesRegex:REGEX_VALID_PASS]" should be false. Wrong password 4 works (No cAPItal letter)andfile://localhost/Users/user/app/AppTest.m: error: testRegex (AppTest) Failed: "[@"PASSWORD2#" matchesRegex:REGEX_VALID_PASS]" should be false. Wrong password 5 works (No small letter)解决方法 您指定了NSRegularExpressionCaseInsensitive选项,因此表达式不区分大写和小写字母是有意义的.
使用指定的NSRegularExpressionCaseInsensitive选项,(?=.* [a-z])将匹配任何字母,包括大写字母;类似地,(?=.* [A-Z])也将匹配小写字母.
您的失败单元测试期望有不同的行为:它们都检查密码是否包含大写和小写字母,而输入包含相同大小写的字母.
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