java data_error ai_generated true

断言失败错误：期望抛出 java.lang.RuntimeException，但实际抛出了 java.lang.NullPointerException

org.opentest4j.AssertionFailedError: Expected java.lang.RuntimeException to be thrown, but java.lang.NullPointerException was thrown

ID: java/junit-assert-throws-wrong-type

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80%修复率
82%置信度
0证据数
2024-12-20首次发现

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根因分析

assertThrows 期望特定的异常类型，但抛出了不同的异常。

English

assertThrows expects a specific exception type, but a different exception is thrown.

generic

解决方案

  1. 95% 成功率 Use assertThrows with correct exception type 
    assertThrows(NullPointerException.class, () -> {
    // code that throws NPE
});
  2. 80% 成功率 Use assertThrowsAny for multiple exception types 
    assertThrowsAny(RuntimeException.class, () -> {
    // code
});

无效尝试

常见但无效的做法:

  1. Catching the actual exception and ignoring 60% 失败

    Test passes incorrectly; real exception type mismatch is hidden.

  2. Changing expected type to Exception 50% 失败

    Too broad; may hide other issues.