ICU 56 update step 1

source/test/intltest/strtest.cpp

Index: source/test/intltest/strtest.cpp
diff --git a/source/test/intltest/strtest.cpp b/source/test/intltest/strtest.cpp
index 2081454d5fead6ffbeaea7aa021acea079485c31..5075fa5fc8e1a9b2eee103822d58cc64c7b2c839 100644
--- a/source/test/intltest/strtest.cpp
+++ b/source/test/intltest/strtest.cpp
@@ -1,6 +1,6 @@
 /********************************************************************
  * COPYRIGHT: 
- * Copyright (c) 1997-2012, International Business Machines Corporation and
+ * Copyright (c) 1997-2015, International Business Machines Corporation and
  * others. All Rights Reserved.
  ********************************************************************/
 /*   file name:  strtest.cpp
@@ -521,4 +521,14 @@ StringTest::TestCharString() {
     if (0 != strcmp(expected, chStr.data()) || (int32_t)strlen(expected) != chStr.length()) {
         errln("CharString.getAppendBuffer().append(**) failed.");
     }
+
+    UErrorCode ec = U_ZERO_ERROR;
+    chStr.clear();
+    chStr.appendInvariantChars(UnicodeString("The '@' character is not invariant."), ec);
+    if (ec != U_INVARIANT_CONVERSION_ERROR) {
+        errln("%s:%d expected U_INVARIANT_CONVERSION_ERROR, got %s", __FILE__, __LINE__, u_errorName(ec));
+    }
+    if (chStr.length() != 0) {
+        errln("%s:%d expected length() = 0, got %d", __FILE__, __LINE__, chStr.length());
+    }
 }