Unable to use CaseDescription when param contains reserved regexp character

[nikowitt]

Hi Jan,

    @Test
    @DataProvider(splitBy = __, value = {
            "Test/Project # Name " + __ + "Test Project Name",
            "\r\nTest/  %Project% # Name *" + __ + "Test Project Name",
            "Test Project Name in C$ash" + __ + "Test Project Name"
    })
    @CaseDescription("Input '$0'")
    public void strip_invalid_imap_folder_name_characters(String input, String output) throws Exception {
        assert_that().assert_expression(JAFStringUtils.stripInvalidIMAPFolderNameCharacters(input), is(output),
                "via 'stripInvalidIMAPFolderNameCharacters(String name)'");
    }

returns an error:

java.lang.IllegalArgumentException: Illegal group reference
    at java.util.regex.Matcher.appendReplacement(Unknown Source)
    at com.tngtech.jgiven.impl.params.DefaultCaseDescriptionProvider.description(DefaultCaseDescriptionProvider.java:42)
    at com.tngtech.jgiven.impl.ScenarioModelBuilder.setCaseDescription(ScenarioModelBuilder.java:306)
    at com.tngtech.jgiven.impl.ScenarioModelBuilder.scenarioStarted(ScenarioModelBuilder.java:292)
    at com.tngtech.jgiven.impl.StandaloneScenarioExecutor.startScenario(StandaloneScenarioExecutor.java:440)
    at com.tngtech.jgiven.impl.ScenarioBase.startScenario(ScenarioBase.java:75)
    at com.tngtech.jgiven.junit.ScenarioExecutionRule.starting(ScenarioExecutionRule.java:110)
    at com.tngtech.jgiven.junit.ScenarioExecutionRule$1.evaluate(ScenarioExecutionRule.java:72)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)

So an additional escape for params is required.

[janschaefer]

Ah, this is a classic. I fall into this trap already. I forgot to call quoteReplacement on the argument.

[nikowitt]

Hehe, so did I :)

[janschaefer]

This is an ideal use case to try out property based testing :-)