unit-testing - Why is a method call shown as not covered when the code within the method is covered with emma?

Question

I am writing a unit test to check that a private method will close a stream.

The unit test calls methodB and the variable something is null

The unit test doesn't mock the class on test

The private method is within a public method that I am calling.

Using emma in eclipse (via the eclemma plugin) the method call is displayed as not being covered even though the code within the method is

e.g

public methodA(){

    if (something==null) {
        methodB(); //Not displayed as covered
    }
}

private methodB(){
    lineCoveredByTest; //displayed as covered
}

Why would the method call not be highlighted as being covered?

Answer 1

我发现 EMMA 的 eclipse 插件有很多 bug，并且和你描述的有类似的经历。最好单独使用 EMMA（如果需要，通过 ANT）。确保始终重新生成 EMMA 生成的元数据文件，以避免合并混淆（我怀疑这是 eclipse 插件的问题）。

Answer 2

我假设当您说“单元测试调用methodB()”时，您的意思不是直接和通过methodA()。

那么，是否有可能methodB()在其他地方被调用，或者被另一个单元测试调用methodC()？