Jmeter 响应断言源码解析

1、响应断言选项

2、选项对应的检查点类型：Assession.Type

[code=language-ini]//断言类型对应的编码
private final static int MATCH = 1 << 0;

final static int CONTAINS = 1 << 1;

private final static int NOT = 1 << 2;

private final static int EQUALS = 1 << 3;

private final static int SUBSTRING = 1 << 4;

1：表示匹配
2：代表contains
8：代表equals
16：代表substring
6：不包含
5：不匹配
12：不相等
20：非substring

3、断言源码片段讲解

[code=language-java]        //断言类型的判断就是根据配置文件中保存的编码
boolean contains = isContainsType(); //判断是否是contains断言
boolean equals = isEqualsType(); //判断是否是equals断言
boolean substring = isSubstringType();//判断是否是Substring断言
boolean matches = isMatchType();//判断是否是Match（匹配）断言
boolean debugEnabled = log.isDebugEnabled();
if (debugEnabled){
log.debug("Type:" + (contains?"Contains":"Match") + (notTest? "(not)": ""));
}

try {
// Get the Matcher for this thread
Perl5Matcher localMatcher = JMeterUtils.getMatcher();
PropertyIterator iter = getTestStrings().iterator();
while (iter.hasNext()) {
String stringPattern = iter.next().getStringValue();
Pattern pattern = null;
if (contains || matches) {
pattern = JMeterUtils.getPatternCache().getPattern(stringPattern, Perl5Compiler.READ_ONLY_MASK);
}
boolean found;
if (contains) {  //可以看到，如果断言为contains，则直接调的为String中的contains方法并且支持正则表达式
found = localMatcher.contains(toCheck, pattern);
} else if (equals) {//如果断言为equals，则直接调的String的equals方法，不支持正则
found = toCheck.equals(stringPattern);
} else if (substring) {
//如果断言为Substring，则调用的是indexOf。如果从源码看，contains使用的也是indexOf做判断的。indexOf会做一定的匹配，然后把匹配的第一个字符的位置返回，返回的是int类型，如果没找到，那么返回-1。之所以有这两个方法存在，个人感觉应该是为了匹配jdk低版本。indexOf从java1.0就有，而contains从java5.0才有。
found = toCheck.indexOf(stringPattern) != -1;
} else {//其他类型的判断和contains就没有区别了，匹配走的也是这个分支
found = localMatcher.matches(toCheck, pattern);
}
pass = notTest ? !found : found;
if (!pass) {
if (debugEnabled){log.debug("Failed: "+stringPattern);}
result.setFailure(true);
result.setFailureMessage(getFailText(stringPattern,toCheck));
break;
}
if (debugEnabled){log.debug("Passed: "+stringPattern);}
}
} catch (MalformedCachePatternException e) {
result.setError(true);
result.setFailure(false);
result.setFailureMessage("Bad test configuration " + e);
}
return result;

4、日志输出源码片段

[code=language-java]        switch (getTestType()) {
case CONTAINS:
case SUBSTRING:   //可以看出Contains和substring同样都是contain
sb.append(" expected to contain ");
break;
case NOT | CONTAINS:
case NOT | SUBSTRING:
sb.append(" expected not to contain ");
break;
case MATCH:
sb.append(" expected to match ");
break;
case NOT | MATCH:
sb.append(" expected not to match ");
break;
case EQUALS:
sb.append(" expected to equal ");
break;
case NOT | EQUALS:
sb.append(" expected not to equal ");
break;
default:// should never happen...
sb.append(" expected something using ");
}