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POHow to JUnit test ParseException
 

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  1. POHow to JUnit test ParseException
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    <p>So, I am working on a project, and I have to test if my method catches a <code>ParseException</code> when it occures. Here is how the method that I need to test looks like:</p> <pre><code>public void convertToModel(final BuildStone bs, final TextBuildStone model) { try { model.setBeginDateRange(ProjectDateConverter.projectDateToCalendarDefaultMin(bs.getFromDate(), true)); } catch (final ParseException e) { SystemContext.getLogger().warning( this, "treatGeneralData", "Date not converted: {0}, BeginDate set at MinDate", bs.getFromDate()); model.setBeginDateRange(CalendarConstants.getMinDate()); } </code></pre> <p>So I have to test when this method catches a <code>ParseException</code>.</p> <p>The method that throws a ParseException is <code>projectDateToCalendarDefaultMin</code> , here is the code of that method:</p> <pre><code>public static Calendar projectDateToCalendarDefaultMin(final BigDecimal dateValue, final boolean useMinDate) throws ParseException { return dateValue == null ? ProjectDateConverter.projectDateStringToCalendar(null, useMinDate, false) : ProjectDateConverter .projectDateStringToCalendar(dateValue.toString(), useMinDate, false); </code></pre> <p>The method that throws ParseException is called <code>projectDateStringToCalendar</code>. Here is how that one looks like:</p> <pre><code>private static Calendar projectDateStringToCalendar(final String dateValue, final boolean useMinDate, final boolean useMaxDate) throws ParseException { if (useMinDate &amp;&amp; useMaxDate) { throw new IllegalArgumentException("useMinDate and useMaxDate may not be set as true "); } if (StringUtils.isEmpty(dateValue)) { if (useMinDate) { return CalendarConstants.getMinDate(); } else if (useMaxDate) { return CalendarConstants.getMaxDate(); } else { return null; } } ... final GregorianCalendar gc = new GregorianCalendar(); gc.setTime(new SimpleDateFormat("yyyyMMdd").parse(dateValue)); return gc; } </code></pre> <p>So this is where the <code>ParseException</code> is finally thrown, at the <code>parse()</code> method. <code>ParseException</code> is from <code>text.parse</code> package and the method parse looks like this:</p> <pre><code> public Date parse(String source) throws ParseException { ParsePosition pos = new ParsePosition(0); Date result = parse(source, pos); if (pos.index == 0) throw new ParseException("Unparseable date: \"" + source + "\"" , pos.errorIndex); return result; } </code></pre> <p>What I have already tried to do is to set <code>bs.getFromDate</code> to null but the test would always be red. I used <code>@Test(expected: ParseException.class)</code> annotation in my test, but I just can't make it go green. Perhaps <code>bs.getFromDate</code> is not the right value that is being parsed? </p> <p>Does anyone have any other idea how to make this test work? Thanks in advance!</p>
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    1. USGaurav Manral
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    1. COWould you paste the JUnit Test method? Maybe some other Expcetion occurs before it?
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      1. USdarijan
 

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