Adding test code for String::lastIndexOf(...)

Author: aentinger

test/CMakeLists.txt

@@ -44,6 +44,7 @@ set(TEST_SRCS
   src/Ringbuffer/test_store_char.cpp
   src/String/test_concat.cpp
   src/String/test_indexOf.cpp
+  src/String/test_lastIndexOf.cpp
   src/String/test_length.cpp
   src/String/test_remove.cpp
   src/String/test_replace.cpp

test/src/String/test_lastIndexOf.cpp

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2020 Arduino.  All rights reserved.
+ */
+
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#include <catch.hpp>
+
+#include <String.h>
+
+/**************************************************************************************
+ * TEST CODE
+ **************************************************************************************/
+
+TEST_CASE ("Testing String::lastIndexOf(char ch)", "[String-lastIndexOf-01]")
+{
+  WHEN ("str is empty")
+  {
+    arduino::String str;
+    REQUIRE(str.lastIndexOf('a') == -1);
+  }
+  WHEN ("str does not contained searched element")
+  {
+    arduino::String str("Hello");
+    REQUIRE(str.lastIndexOf('a') == -1);
+  }
+  WHEN ("str does contain searched element")
+  {
+    arduino::String str("Hellolol");
+    REQUIRE(str.lastIndexOf('l') == 7);
+  }
+}
+
+TEST_CASE ("Testing String::lastIndexOf(char ch, unsigned int fromIndex)", "[String-lastIndexOf-02]")
+{
+  WHEN ("str is empty")
+  {
+    arduino::String str;
+    REQUIRE(str.lastIndexOf('a', 5) == -1);
+  }
+  WHEN ("str does not contained searched element")
+  {
+    arduino::String str("Hallo");
+    REQUIRE(str.lastIndexOf('o', 3) == -1);
+  }
+  WHEN ("str does contain searched element")
+  {
+    arduino::String str("Hellolol");
+    REQUIRE(str.lastIndexOf('l', 3) == 3);
+  }
+}
+
+TEST_CASE ("Testing String::lastIndexOf(const String &)", "[String-lastIndexOf-03]")
+{
+  arduino::String const search_str("Arduino");
+
+  WHEN ("str is empty")
+  {
+    arduino::String str;
+    REQUIRE(str.lastIndexOf(search_str) == -1);
+  }
+  WHEN ("str does not contained searched element")
+  {
+    arduino::String str("Hallo");
+    REQUIRE(str.lastIndexOf(search_str) == -1);
+  }
+  WHEN ("str does contain searched element")
+  {
+    arduino::String str("Hello Arduino, Arduino!");
+    REQUIRE(str.lastIndexOf(search_str) == 15);
+  }
+}
+
+TEST_CASE ("Testing String::lastIndexOf(const String &, unsigned int fromIndex)", "[String-lastIndexOf-04]")
+{
+  arduino::String const search_str("Arduino");
+
+  WHEN ("str is empty")
+  {
+    arduino::String str;
+    REQUIRE(str.lastIndexOf(search_str, 3) == -1);
+  }
+  WHEN ("str does not contained searched element")
+  {
+    arduino::String str("Hallo");
+    REQUIRE(str.lastIndexOf(search_str, 3) == -1);
+  }
+  WHEN ("str does contain searched element and fromIndex is > start of searched element")
+  {
+    arduino::String str("Hello Arduino, Arduino!");
+    REQUIRE(str.lastIndexOf(search_str, 17) == 15);
+  }
+  WHEN ("str does contain searched element and fromIndex is < start of searched element")
+  {
+    arduino::String str("Hello Arduino, Arduino!");
+    REQUIRE(str.lastIndexOf(search_str, 3) == -1);
+  }
+}