如何使用PowerMockito捕获/抛出异常(How to catch/throw exception using PowerMockito)

 我正在为一个不抛出异常的方法编写JUnit测试用例，但是这个方法调用抛出ParseException parse()方法，我需要捕获它。 我创建了一个测试用例，我传递了无效的日期格式，在调试过程中，它进入parse方法，然后进入catch块，但是如何在测试用例中显式抛出ParseException ，然后比较日志中的String。 希望我很清楚。 
 
 测试方法。 
 
public static String convertUTC( String strDate, String inputFormat, String outputFormat ) {
    String displayDateString = null;

    try {
        DateFormat inFormat = new SimpleDateFormat( inputFormat );
        inFormat.setTimeZone( TimeZone.getTimeZone( "UTC" ) );
        Date date = inFormat.parse( strDate );

        DateFormat outFormat = new SimpleDateFormat( outputFormat );
        outFormat.setTimeZone( TimeZone.getDefault() );

        displayDateString = formatDate(date, outputFormat);
    } catch ( ParseException pe ) {
        log.error( "DateUtil.convertUTC :Parse exception while parsing,"+strDate+" using format :"+inputFormat) ; 
    }

    return displayDateString;
}
 
 JUnit的 
 
@Test
public void testConvertUTCParseException() {
    String incomingDate = "2012-08-15T22:56:02.038Z";
    String inputFormat = "MM/dd/yy hh:mm a z";
    String outputFormat = "MM/dd/yy hh:mm a z";

    assertEquals( null, DateUtils.convertUTC( incomingDate, inputFormat, outputFormat ) );
}
 
 除了上面的测试用例，我想使用PowerMockito显式抛出ParseException并在日志中执行assert来比较文本。 我不能这样做的原因是因为converUTC不会抛出ParseException。 
 
 我假设这会抛出异常，但我如何比较日志中的文本？ 
 
@SuppressWarnings("unchecked")
@Test
public void testCaughtParseException() throws Exception {
    PowerMockito.mockStatic( DateUtils.class );
    PowerMockito.when( DateUtils.convertUTC( Mockito.any( String.class ), Mockito.any( String.class ), Mockito.any( String.class ) ) ).thenThrow( ParseException.class );   
}
 
 谢谢。 

I am writing JUnit test case for a method which doesn't throw exception but this method invokes parse() method which throws ParseException and I need to catch it. I have created one test case where I am passing invalid date format and during debugging it goes in the parse method and then to the catch block but how can I explicitly throw ParseException in a test case and then compare the String in the log. Hope I am clear. 
 
Method under test. 
 
public static String convertUTC( String strDate, String inputFormat, String outputFormat ) {
    String displayDateString = null;

    try {
        DateFormat inFormat = new SimpleDateFormat( inputFormat );
        inFormat.setTimeZone( TimeZone.getTimeZone( "UTC" ) );
        Date date = inFormat.parse( strDate );

        DateFormat outFormat = new SimpleDateFormat( outputFormat );
        outFormat.setTimeZone( TimeZone.getDefault() );

        displayDateString = formatDate(date, outputFormat);
    } catch ( ParseException pe ) {
        log.error( "DateUtil.convertUTC :Parse exception while parsing,"+strDate+" using format :"+inputFormat) ; 
    }

    return displayDateString;
}
 
JUnit
 
@Test
public void testConvertUTCParseException() {
    String incomingDate = "2012-08-15T22:56:02.038Z";
    String inputFormat = "MM/dd/yy hh:mm a z";
    String outputFormat = "MM/dd/yy hh:mm a z";

    assertEquals( null, DateUtils.convertUTC( incomingDate, inputFormat, outputFormat ) );
}
 
Apart from the above test case I want to explicitly throw ParseException using PowerMockito and do the assert in the log to compare the text. The reason I cannot do it is because converUTC doesn't throw ParseException. 
 
I assume this throws exception but how can I compare the text in the log?
 
@SuppressWarnings("unchecked")
@Test
public void testCaughtParseException() throws Exception {
    PowerMockito.mockStatic( DateUtils.class );
    PowerMockito.when( DateUtils.convertUTC( Mockito.any( String.class ), Mockito.any( String.class ), Mockito.any( String.class ) ) ).thenThrow( ParseException.class );   
}
 
Thanks.

原文：https://stackoverflow.com/questions/44442419