Adding test code for 'IPAddress::fromString'

Author: aentinger

test/CMakeLists.txt

@@ -28,6 +28,7 @@ set(TEST_SRCS
   src/Common/test_makeWord.cpp
   src/Common/test_max.cpp
   src/Common/test_min.cpp
+  src/IPAddress/test_fromString.cpp
   src/IPAddress/test_IPAddress.cpp
   src/Print/test_clearWriteError.cpp
   src/Print/test_getWriteError.cpp

test/src/IPAddress/test_fromString.cpp

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2020 Arduino.  All rights reserved.
+ */
+
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#include <catch.hpp>
+
+#include <String.h>
+#include <IPAddress.h>
+
+/**************************************************************************************
+ * TEST CODE
+ **************************************************************************************/
+
+TEST_CASE ("Extract valid IP address 'fromString(const char *)'", "[IPAddress-fromString-01]")
+{
+  arduino::IPAddress ip;
+
+  REQUIRE(ip.fromString("129.168.1.2") == true);
+
+  REQUIRE(ip[0] == 129);
+  REQUIRE(ip[1] == 168);
+  REQUIRE(ip[2] == 1);
+  REQUIRE(ip[3] == 2);
+}
+
+TEST_CASE ("Extract valid IP address 'fromString(const String &)'", "[IPAddress-fromString-02]")
+{
+  arduino::IPAddress ip;
+
+  arduino::String const ip_addr_str("129.168.1.2");
+
+  REQUIRE(ip.fromString(ip_addr_str) == true);
+
+  REQUIRE(ip[0] == 129);
+  REQUIRE(ip[1] == 168);
+  REQUIRE(ip[2] == 1);
+  REQUIRE(ip[3] == 2);
+}
+
+
+TEST_CASE ("Extract invalid IP address 'fromString(const char *)'", "[IPAddress-fromString-03]")
+{
+  arduino::IPAddress ip;
+
+  REQUIRE(ip.fromString("")          == false);
+  REQUIRE(ip.fromString("1")         == false);
+  REQUIRE(ip.fromString("1.")        == false);
+  REQUIRE(ip.fromString("1.1")       == false);
+  REQUIRE(ip.fromString("1.1.")      == false);
+  REQUIRE(ip.fromString("1.1.1")     == false);
+  REQUIRE(ip.fromString("1.1.1.")    == false);
+  REQUIRE(ip.fromString("256.1.1.1") == false);
+  REQUIRE(ip.fromString("a.1.1.1")   == false);
+  REQUIRE(ip.fromString("-.1.1.1")   == false);
+  REQUIRE(ip.fromString("-1.1.1.1")  == false);
+}