Add test case for multiple failing escapes

Author: michael-o

src/test/java/org/codehaus/plexus/interpolation/multi/MultiDelimiterStringSearchInterpolatorTest.java

@@ -66,4 +66,23 @@ public void testSuccessiveInterpolationWithDifferentDelimiters_ReversedDelimiter
         assertEquals( ctx.get( "name" ), result );
     }
 
+    public void testInterpolationWithMultipleEscapes()
+            throws InterpolationException
+        {
+            Map ctx = new HashMap();
+            ctx.put( "name", "User" );
+            ctx.put( "otherName", "##${first} and #${last}" );
+
+            String input = "${otherName}";
+
+            ValueSource vs = new MapBasedValueSource( ctx );
+            MultiDelimiterStringSearchInterpolator interpolator = new MultiDelimiterStringSearchInterpolator()
+                                                                          .withValueSource( vs );
+            interpolator.setEscapeString("#");
+
+            String result = interpolator.interpolate( input );
+
+            assertEquals( "#${first} and ${last}", result );
+        }
+
 }