diff --git a/src/tests/kits/support/bstring/StringReplaceTest.cpp b/src/tests/kits/support/bstring/StringReplaceTest.cpp
index 6a2540844c..4e8ee6954c 100644
--- a/src/tests/kits/support/bstring/StringReplaceTest.cpp
+++ b/src/tests/kits/support/bstring/StringReplaceTest.cpp
@@ -124,10 +124,134 @@ StringReplaceTest::PerformTest(void)
 
 	NextSubTest();
 	str1 = new BString("she sells sea shells on the seashore");
-	str1->ReplaceAll("sea", "the", 11);
+	str1->IReplaceAll("sea", "the", 11);
 	CPPUNIT_ASSERT(strcmp(str1->String(),
 		"she sells sea shells on the theshore") == 0);
 	delete str1;
+	
+	//&IReplaceFirst(char, char);
+	NextSubTest();
+	str1 = new BString("test string");
+	str1->IReplaceFirst('t', 'b');
+	CPPUNIT_ASSERT(strcmp(str1->String(), "best string") == 0);
+	delete str1;
+
+	NextSubTest();
+	str1 = new BString("test string");
+	str1->IReplaceFirst('x', 'b');
+	CPPUNIT_ASSERT(strcmp(str1->String(), "test string") == 0);
+	delete str1;
+
+	//&IReplaceLast(char, char);
+	NextSubTest();
+	str1 = new BString("test string");
+	str1->IReplaceLast('t', 'w');
+	CPPUNIT_ASSERT(strcmp(str1->String(), "test swring") == 0);
+	delete str1;
+
+	NextSubTest();
+	str1 = new BString("test string");
+	str1->IReplaceLast('x', 'b');
+	CPPUNIT_ASSERT(strcmp(str1->String(), "test string") == 0);
+	delete str1;
+
+	//&IReplaceAll(char, char, int32);
+	NextSubTest();
+	str1 = new BString("TEST string");
+	str1->IReplaceAll('t', 'i');
+	CPPUNIT_ASSERT(strcmp(str1->String(), "iESi siring") == 0);
+	delete str1;
+
+	NextSubTest();
+	str1 = new BString("test string");
+	str1->IReplaceAll('x', 'b');
+	CPPUNIT_ASSERT(strcmp(str1->String(), "test string") == 0);
+	delete str1;
+
+	NextSubTest();
+	str1 = new BString("TEST string");
+	str1->IReplaceAll('t', 'i', 2);
+	CPPUNIT_ASSERT(strcmp(str1->String(), "TESi siring") == 0);
+	delete str1;
+
+	//&IReplace(char, char, int32, int32)
+	NextSubTest();
+	str1 = new BString("She sells Sea shells on the sea shore");
+	str1->IReplace('s', 't', 4, 2);
+	CPPUNIT_ASSERT(strcmp(str1->String(), "She tellt tea thells on the sea shore") == 0);
+	delete str1;
+
+	NextSubTest();
+	str1 = new BString();
+	str1->IReplace('s', 'x', 12, 32);
+	CPPUNIT_ASSERT(strcmp(str1->String(), "") == 0);
+	delete str1;
+
+	//&IReplaceFirst(const char*, const char*)
+	NextSubTest();
+	str1 = new BString("she sells SeA shells on the seashore");
+	str1->IReplaceFirst("sea", "the");
+	CPPUNIT_ASSERT(strcmp(str1->String(),
+		"she sells the shells on the seashore") == 0);
+	delete str1;
+
+	NextSubTest();
+	str1 = new BString("she sells sea shells on the seashore");
+	str1->IReplaceFirst("tex", "the");
+	CPPUNIT_ASSERT(strcmp(str1->String(),
+		"she sells sea shells on the seashore") == 0);
+	delete str1;
+
+	//&IReplaceLast(const char*, const char*)
+	NextSubTest();
+	str1 = new BString("she sells sea shells on the SEashore");
+	str1->IReplaceLast("sea", "the");
+	CPPUNIT_ASSERT(strcmp(str1->String(),
+		"she sells sea shells on the theshore") == 0);
+	delete str1;
+
+	NextSubTest();
+	str1 = new BString("she sells sea shells on the seashore");
+	str1->IReplaceLast("tex", "the");
+	CPPUNIT_ASSERT(strcmp(str1->String(),
+		"she sells sea shells on the seashore") == 0);
+	delete str1;
+
+	//&IReplaceAll(const char*, const char*, int32)
+	NextSubTest();
+	str1 = new BString("abc ABc aBc");
+	str1->IReplaceAll("ab", "abc");
+	CPPUNIT_ASSERT(strcmp(str1->String(),
+		"abcc abcc abcc") == 0);
+	delete str1;
+
+	NextSubTest();
+	str1 = new BString("she sells sea shells on the seashore");
+	str1->IReplaceAll("tex", "the");
+	CPPUNIT_ASSERT(strcmp(str1->String(),
+		"she sells sea shells on the seashore") == 0);
+	delete str1;
+
+	NextSubTest();
+	str1 = new BString("she sells SeA shells on the sEashore");
+	str1->IReplaceAll("sea", "the", 11);
+	CPPUNIT_ASSERT(strcmp(str1->String(),
+		"she sells SeA shells on the theshore") == 0);
+	delete str1;
+	
+	//ReplaceSet(const char*, char)
+	NextSubTest();
+	str1 = new BString("abc abc abc");
+	str1->ReplaceSet("ab", 'x');
+	CPPUNIT_ASSERT(strcmp(str1->String(), "xxc xxc xxc") == 0);
+	delete str1;
+	
+	//ReplaceSet(const char*, const char*)
+	NextSubTest();
+	str1 = new BString("abcd abcd abcd");
+	str1->ReplaceSet("ad", "da");
+	CPPUNIT_ASSERT(strcmp(str1->String(), "dabcda dabcda dabcda") == 0);
+	delete str1;
 }