[jira] [Created] (LANG-1158) StrSubstitutor - escape character not working just before a variable

["Woonsan Ko (JIRA)" <ji...@apache.org>]

Woonsan Ko created LANG-1158:
--------------------------------

             Summary: StrSubstitutor - escape character not working just before a variable
                 Key: LANG-1158
                 URL: https://issues.apache.org/jira/browse/LANG-1158
             Project: Commons Lang
          Issue Type: Bug
    Affects Versions: 3.4
            Reporter: Woonsan Ko


I tried to use the following, expecting "...ick brown fox paid $20.00
to jump over the la…":

{code}
    // In org.apache.commons.lang3.text.StrSubstitutorTest.java locally
    // after cloning https://github.com/woonsan/commons-lang.
    @Test
    public void testReplaceEscapingDollarSign() {
        values.put("amount", "20.00");
        doTestReplace("The quick brown fox paid $20.00 to jump over
the lazy dog.",
                      "The ${animal} paid $$${amount} to jump over the
${target}.", true);
    }
{code}

(I put double dollar signs like $$${amount} because $ is the default
escape character.)
Because I put three dollar signs in total, it should give one dollar sign followed by the resolved amount value: "$20.00".

But, the result was:"...ick brown fox paid $${amount} to jump over the la…".

I also tried using a different escape character like this:

{code}
    @Test
    public void testReplaceEscapingDollarSign() {
        values.put("amount", "20.00");

        final StrSubstitutor sub = new StrSubstitutor(values);
        sub.setEscapeChar('<');

        String replaceTemplate = "The <${animal} jumps over the ${target}.";
        String expectedResult = "The ${animal} jumps over the lazy dog.";
        String replacedResult = sub.replace(replaceTemplate);
        assertEquals(expectedResult, replacedResult);

        //...
    }
{code}

However, it fails like this:

{noformat}
Tests run: 41, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.048 sec <<< FAILURE! - in org.apache.commons.lang3.text.StrSubstitutorTest
testReplaceEscapingDollarSign(org.apache.commons.lang3.text.StrSubstitutorTest)  Time elapsed: 0.009 sec  <<< FAILURE!
org.junit.ComparisonFailure: expected:<...uick brown fox paid []$20.00 to jump over ...> but was:<...uick brown fox paid [<]$20.00 to jump over ...>
	at org.junit.Assert.assertEquals(Assert.java:115)
	at org.junit.Assert.assertEquals(Assert.java:144)
	at org.apache.commons.lang3.text.StrSubstitutorTest.testReplaceEscapingDollarSign(StrSubstitutorTest.java:182)
{noformat}

I think there's a bug at least, regard escape character handling.



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