Add test code for String comparison functions

Author: giulcioffi

test/CMakeLists.txt

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

test/src/String/test_comparisonFunc.cpp

@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2020 Arduino.  All rights reserved.
+ */
+
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#include <catch.hpp>
+
+#include <String.h>
+
+/**************************************************************************************
+ * TEST CODE
+ **************************************************************************************/
+
+TEST_CASE ("Testing String::equals(const String &) with exit status PASS", "[String-equals-01]")
+{
+  arduino::String str1("Hello"), str2("Hello");
+  REQUIRE(str1.equals(str2) == 1);
+}
+
+TEST_CASE ("Testing String::equals(const String &) with exit status FAIL", "[String-equals-02]")
+{
+  arduino::String str1("Hello"), str2("World");
+  REQUIRE(str1.equals(str2) == 0);
+}
+
+TEST_CASE ("Testing String::equals(const char *) with exit status PASS", "[String-equals-03]")
+{
+  arduino::String str1("Hello");
+  REQUIRE(str1.equals("Hello") == 1);
+}
+
+TEST_CASE ("Testing String::equals(const char *) with exit status FAIL", "[String-equals-04]")
+{
+  arduino::String str1("Hello");
+  REQUIRE(str1.equals("World") == 0);
+}
+
+TEST_CASE ("Testing String::equalsIgnoreCase(const String &) PASS with NON-empty string", "[String-equalsIgnoreCase-05]")
+{
+  arduino::String str1("Hello"), str2("Hello");
+  REQUIRE(str1.equalsIgnoreCase(str2) == 1);
+}
+
+TEST_CASE ("Testing String::equalsIgnoreCase(const String &) FAIL with NON-empty string", "[String-equalsIgnoreCase-06]")
+{
+  arduino::String str1("Hello"), str2("Hel");
+  REQUIRE(str1.equalsIgnoreCase(str2) == 0);
+}
+
+TEST_CASE ("Testing String::equalsIgnoreCase(const String &) FAIL with different strings", "[String-equalsIgnoreCase-07]")
+{
+  arduino::String str1("Hello"), str2("World");
+  REQUIRE(str1.equalsIgnoreCase(str2) == 0);
+}
+
+TEST_CASE ("Testing String::equalsIgnoreCase(const String &) PASS with same string", "[String-equalsIgnoreCase-08]")
+{
+  arduino::String str1("Hello");
+  REQUIRE(str1.equalsIgnoreCase(str1) == 1);
+}
+
+TEST_CASE ("Testing String::startsWith(const String &)", "[String-startsWith-09]")
+{
+  WHEN ("str2 is larger than str1")
+  {
+    arduino::String str1("Hello");
+    arduino::String str2("Hello World");
+    REQUIRE(str1.startsWith(str2) == 0);
+  }
+  WHEN ("str1 starts with str2")
+  {
+    arduino::String str1("Hello World");
+    arduino::String str2("Hello");
+    REQUIRE(str1.startsWith(str2) == 1);
+  }
+  WHEN ("str1 does NOT start with str2")
+  {
+    arduino::String str1("Hello World");
+    arduino::String str2("Helo");
+    REQUIRE(str1.startsWith(str2) == 0);
+  }
+}
+
+TEST_CASE ("Testing String::endsWith(const String &)", "[String-endsWith-10]")
+{
+  WHEN ("str2 is larger than str1")
+  {
+    arduino::String str1("Hello");
+    arduino::String str2("Hello World");
+    REQUIRE(str1.endsWith(str2) == 0);
+  }
+  WHEN ("str1 ends with str2")
+  {
+    arduino::String str1("Hello World");
+    arduino::String str2("World");
+    REQUIRE(str1.endsWith(str2) == 1);
+  }
+  WHEN ("str1 does NOT end with str2")
+  {
+    arduino::String str1("Hello World");
+    arduino::String str2("Helo");
+    REQUIRE(str1.endsWith(str2) == 0);
+  }
+}