Question

我有一个参数化测试用例，就像我在测试套件中的一堆其他测试用例一样，我一直在尝试添加它们。

package com.example;

import com.google.gson.Gson;
import com.example.Event;
import com.example.LocalStorage;
import com.example.TimeMachine;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

import java.util.Arrays;
import java.util.Collection;

import static org.fest.assertions.api.Assertions.assertThat;
import static org.mockito.Mockito.mock;

@RunWith(Parameterized.class)
public class TimeMachineEventEndTimeTest {

    public TimeMachineEventEndTimeTest(Event event, String end_time) {
        _event = event;
        _end_time = end_time;
    }

    @Parameters
    public static Collection<Object[]> data() {
        return Arrays.asList(new Object[][]{
            { _UNSCHEDULED, "" },
            { _NOON_FOR_1_HOUR, "13:00" },
            { _NOON_FOR_HALF_HOUR, "12:30" },
            { _MIDNIGHT_FOR_1_HOUR, "1:00" },
            { _MIDNIGHT_FOR_HALF_HOUR, "0:30" },
            { _MIDNIGHT_FOR_12_HOUR, "12:00" }
        });
    }

    @Before
    public void initialize() throws Exception {
        _time_machine = new _TimeMachine();
    }

    @Test
    public void testEndTimeForEvent() throws Exception {
        assertThat(_time_machine.endTimeForEvent(_event)).isEqualTo(_end_time);
    }

    private TimeMachine _time_machine;
    private final Event _event;
    private final String _end_time;
    private static final Gson _gson = new _GsonProvider(mock(LocalStorage.class)).gson();
    private static final Event _UNSCHEDULED = _gson.fromJson("{}", Event.class);
    private static final Event _NOON_FOR_1_HOUR = _gson.fromJson("{\n" +
        "      \"starttime\" : \"12:00\",\n" +
        "      \"duration\" : \"60\",\n" +
        "    }", Event.class);
    private static final Event _NOON_FOR_HALF_HOUR = _gson.fromJson("{\n" +
        "      \"starttime\" : \"12:00\",\n" +
        "      \"duration\" : \"30\",\n" +
        "    }", Event.class);
    private static final Event _MIDNIGHT_FOR_1_HOUR = _gson.fromJson("{\n" +
        "      \"starttime\" : \"0:00\",\n" +
        "      \"duration\" : \"60\",\n" +
        "    }", Event.class);
    private static final Event _MIDNIGHT_FOR_HALF_HOUR = _gson.fromJson("{\n" +
        "      \"starttime\" : \"0:00\",\n" +
        "      \"duration\" : \"30\",\n" +
        "    }", Event.class);
    private static final Event _MIDNIGHT_FOR_12_HOUR = _gson.fromJson("{\n" +
        "      \"starttime\" : \"0:00\",\n" +
        "      \"duration\" : \"360\",\n" +
        "    }", Event.class);
}

我有一些测试用例几乎完全相同，可以在同一个目录和包中测试不同的方法。我的所有其他测试都运行并传递100％，除了这个测试用例抛出了这个堆栈跟踪：

java.lang.NoClassDefFoundError：无法初始化类com.example.TimeMachineEventEndTimeTest at java.lang.Class.forName0（Native Method） at java.lang.Class.forName（Class.java:186）在org.apache.maven.surefire.report.SmartStackTraceParser.getClass（SmartStackTraceParser.java:63）在org.apache.maven.surefire.report.SmartStackTraceParser。（SmartStackTraceParser.java:53）在org.apache.maven.surefire.common.junit4.JUnit4StackTraceWriter.smartTrimmedStackTrace（JUnit4StackTraceWriter.java:72）在org.apache.maven.surefire.booter.ForkingRunListener.encode（ForkingRunListener.java:328）在org.apache.maven.surefire.booter.ForkingRunListener.encode（ForkingRunListener.java:312）在org.apache.maven.surefire.booter.ForkingRunListener.toString（ForkingRunListener.java:258）在org.apache.maven.surefire.booter.ForkingRunListener.testError（ForkingRunListener.java:131）在org.apache.maven.surefire.common.junit4.JUnit4RunListener.testFailure（JUnit4RunListener.java:111）在org.junit.runner.notification.RunNotifier $ 4.notifyListener（RunNotifier.java:100）在org.junit.runner.notification.RunNotifier $ SafeNotifier.run（RunNotifier.java:41）在org.junit.runner.notification.RunNotifier.fireTestFailure（RunNotifier.java:97）在org.junit.internal.runners.ErrorReportingRunner.runCause（ErrorReportingRunner.java:57）在org.junit.internal.runners.ErrorReportingRunner.run（ErrorReportingRunner.java:34）在org.apache.maven.surefire.junit4.JUnit4Provider.execute（JUnit4Provider.java:264）在org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet（JUnit4Provider.java:153）在org.apache.maven.surefire.junit4.JUnit4Provider.invoke（JUnit4Provider.java:124）

Answer 1

您可以从IDE运行测试吗？由于https://jira.codehaus.org/browse/SUREFIRE-962

，看起来堆栈跟踪具有误导性

如果你能提供一个可以重现问题的可运行的要点，那将会很有帮助。

Answer 2

如果其他人遇到类似的问题，对我来说似乎是我最后几行创建了一些Event。他们在JSON中有一个小错误，在构造它们时必须导致Gson错误。

 private static final Event _NOON_FOR_1_HOUR = _gson.fromJson("{\n" +
    "      \"starttime\" : \"12:00\",\n" +
    "      \"duration\" : \"60\"\n" +
    "    }", Event.class);
private static final Event _NOON_FOR_HALF_HOUR = _gson.fromJson("{\n" +
    "      \"starttime\" : \"12:00\",\n" +
    "      \"duration\" : \"30\"\n" +
    "    }", Event.class);
private static final Event _MIDNIGHT_FOR_1_HOUR = _gson.fromJson("{\n" +
    "      \"starttime\" : \"0:00\",\n" +
    "      \"duration\" : \"60\"\n" +
    "    }", Event.class);
private static final Event _MIDNIGHT_FOR_HALF_HOUR = _gson.fromJson("{\n" +
    "      \"starttime\" : \"0:00\",\n" +
    "      \"duration\" : \"30\"\n" +
    "    }", Event.class);
private static final Event _MIDNIGHT_FOR_12_HOUR = _gson.fromJson("{\n" +
    "      \"starttime\" : \"0:00\",\n" +
    "      \"duration\" : \"360\"\n" +
    "    }", Event.class);

更正是在“持续时间”值之后删除“，”。看来堆栈跟踪非常神秘，而且确实具有误导性。

测试类上的Maven JUnit测试用例NoClassDefFoundException

2 个答案: