字符串的断言失败消息包含子字符串

问题描述

我最近在文本生成软件的文本输出上做了很多功能测试，发现自己写了很多

I have done a lot of functional testing on text outputs on text generating software lately, an find myself writing a lot of

assertTrue(actualString.contains(wantedString));

然而，此失败的消息是非描述性的，如

However, the message for when this fails is something non-descriptive like

Expected [true], but was [false]

另一种方法是包含自定义失败消息

An alternative is to include a custom fail message as

String failMsg = String.format("Wanted string to contain: %s, Actual string: %s", wantedString, actualString);
assertTrue(failMsg, actualString.contains(wantedString));

但是一直手动执行此操作会感觉有点乏味。
还有更好的方法吗？

But it feels a bit tedious to do this manually all the time.Is there a better way?

推荐答案

使用hamcrest Matcher containsString（）

Use hamcrest Matcher containsString()

// Hamcrest assertion
assertThat(person.getName(), containsString("myName"));

// Error Message
java.lang.AssertionError:
Expected: a string containing "myName"
     got: "some other name"

您可以选择添加更详细的错误消息。

You can optional add an even more detail error message.

// Hamcrest assertion with custom error message
assertThat("my error message", person.getName(), containsString("myName"));

// Error Message
java.lang.AssertionError: my error message
Expected: a string containing "myName"
     got: "some other name"

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