如何在不使用 Maven（Gradle 或任何构建自动化工具）的情况下使用 JUnit？

Question

我正在尝试使用尽可能少的设置来使用 JUnit Console Launcher 为我的 java 代码创建单元测试环境。

下面是为测试创建的类：

SumTest.java

import static org.junit.jupiter.api.Assertions.assertEquals;
    
public class SumTest {
    
    @Test
    public void sumTest() {
        assertEquals(10, sum(1,0));        
    }
}

Sum.java

public class Sum {
    public int sum(int a, int b) {
        return a + b;
    }
}  

命令：

 $ java -jar junit-platform-console-standalone-1.8.2.jar -o SumTest.java

输出：

Thanks for using JUnit! Support its development at https://junit.org/sponsoring

╷
├─ JUnit Jupiter ✔
└─ JUnit Vintage ✔

Test run finished after 88 ms
[         2 containers found      ]
[         0 containers skipped    ]
[         2 containers started    ]
[         0 containers aborted    ]
[         2 containers successful ]
[         0 containers failed     ]
[         0 tests found           ]
[         0 tests skipped         ]
[         0 tests started         ]
[         0 tests aborted         ]
[         0 tests successful      ]
[         0 tests failed          ]

我预计会有一个坠落测试。但我的测试没有被认可。

Answer 1

首先，我的Java是错误的。其次，我没有使用正确的命令。

按照以下步骤操作：

1. 下载 JUnit Console Launcher jar
2. 使用刚刚下载的 jar 编译测试所需的类
3. 执行指定要测试的类的测试（有很多关于如何选择类和方法的选项）

运行的命令：

$ Var=junit-platform-console-standalone-1.8.2.jar
$ curl https://repo1.maven.org/maven2/org/junit/platform/junit-platform-console-standalone/1.8.2/junit-platform-console-standalone-1.8.2.jar --output $Var
$ javac -cp "junit-platform-console-standalone-1.8.2.jar" Sum.java SumTest.java
$ java -jar junit-platform-console-standalone-1.8.2.jar -cp "." --select-class SumTest

我 类更正：

SumTest.java

import static org.junit.Assert.assertEquals;
import org.junit.Test;

public class SumTest {
    @Test
    public void sumTest() {
        assertEquals(10, Sum.sum(5, 5));
    }

    @Test
    public void sumTest2() {
        assertEquals(10, Sum.sum(4, 5));
    }
}

Sum.java

public class Sum {
    static int sum(int a, int b) {
        return a + b;
    }
}

测试结果：

Thanks for using JUnit! Support its development at https://junit.org/sponsoring

╷
├─ JUnit Jupiter ✔
└─ JUnit Vintage ✔
   └─ SumTest ✔
      ├─ sumTest ✔
      └─ sumTest2 ✘ expected:<10> but was:<9>

Failures (1):
  JUnit Vintage:SumTest:sumTest2
    MethodSource [className = 'SumTest', methodName = 'sumTest2', methodParameterTypes = '']
    => java.lang.AssertionError: expected:<10> but was:<9>
       org.junit.Assert.fail(Assert.java:89)
       org.junit.Assert.failNotEquals(Assert.java:835)
       org.junit.Assert.assertEquals(Assert.java:647)
       org.junit.Assert.assertEquals(Assert.java:633)
       SumTest.sumTest2(SumTest.java:12)
       java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
       java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
       java.base/java.lang.reflect.Method.invoke(Method.java:568)
       org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
       [...]

Test run finished after 135 ms
[         3 containers found      ]
[         0 containers skipped    ]
[         3 containers started    ]
[         0 containers aborted    ]
[         3 containers successful ]
[         0 containers failed     ]
[         2 tests found           ]
[         0 tests skipped         ]
[         2 tests started         ]
[         0 tests aborted         ]
[         1 tests successful      ]
[         1 tests failed          ]