[commons-configuration] 03/03: Tests an interpolation that consists of a single undefined variable only with and without a default value.

[gg...@apache.org]

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ggregory pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-configuration.git

commit 9bab62a2e6a2bffe32d2d664267c46daf5f73b68
Author: Gary Gregory <ga...@gmail.com>
AuthorDate: Mon Aug 5 11:26:23 2019 -0400

    Tests an interpolation that consists of a single undefined variable only
    with and without a default value.
---
 .../interpol/TestConfigurationInterpolator.java            | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/test/java/org/apache/commons/configuration2/interpol/TestConfigurationInterpolator.java b/src/test/java/org/apache/commons/configuration2/interpol/TestConfigurationInterpolator.java
index 937fde2..24fca68 100644
--- a/src/test/java/org/apache/commons/configuration2/interpol/TestConfigurationInterpolator.java
+++ b/src/test/java/org/apache/commons/configuration2/interpol/TestConfigurationInterpolator.java
@@ -353,6 +353,20 @@ public class TestConfigurationInterpolator
     }
 
     /**
+     * Tests an interpolation that consists of a single undefined variable only with and without a default value.
+     */
+    @Test
+    public void testInterpolationSingleVariableDefaultValue()
+    {
+        final Object value = 42;
+        interpolator.addDefaultLookup(setUpTestLookup(TEST_NAME, value));
+        assertEquals("Wrong result", "${I_am_not_defined}",
+                interpolator.interpolate("${I_am_not_defined}"));
+        assertEquals("Wrong result", "42",
+                interpolator.interpolate("${I_am_not_defined:-42}"));
+    }
+
+    /**
      * Tests a variable declaration which lacks the trailing closing bracket.
      */
     @Test