Adding test code for Common::map

aentinger · aentinger · commit 5bd28b7aed3c · 2020-11-02T15:20:32.000+01:00
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
@@ -26,6 +26,7 @@ set(TEST_TARGET ${CMAKE_PROJECT_NAME})
 
 set(TEST_SRCS
   src/Common/test_makeWord.cpp
+  src/Common/test_map.cpp
   src/Common/test_max.cpp
   src/Common/test_min.cpp
   src/IPAddress/test_fromString.cpp
diff --git a/test/src/Common/test_map.cpp b/test/src/Common/test_map.cpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2020 Arduino.  All rights reserved.
+ */
+
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#include <catch.hpp>
+
+#include <Common.h>
+
+/**************************************************************************************
+ * TEST CODE
+ **************************************************************************************/
+
+TEST_CASE ("Testing 'map(val, fromLow, fromHigh, toLow, toHigh)' usage with reduction of output", "[map-01]")
+{
+  REQUIRE(map(50, 0, 100, 0, 10) == 5);
+}
+
+TEST_CASE ("Testing 'map(val, fromLow, fromHigh, toLow, toHigh)' usage with increase of output", "[map-02]")
+{
+  REQUIRE(map(5, 0, 10, 0, 100) == 50);
+}
+
+TEST_CASE ("Testing 'map(val, fromLow, fromHigh, toLow, toHigh)' where output is reduced to a value < 0", "[map-03]")
+{
+  REQUIRE(map(1, 0, 100, 0, 10) == 0); /* Would be 0.1 if we'd be using floating point. */
+}
+
+TEST_CASE ("Testing 'map(val, fromLow, fromHigh, toLow, toHigh)' default usage with negative values", "[map-04]")
+{
+  WHEN ("Negative 'from' values")
+  {
+    REQUIRE(map(0,    0, -256, 0, 1024) ==    0);
+    REQUIRE(map(-256, 0, -256, 0, 1024) == 1024);
+    REQUIRE(map(-128, 0, -256, 0, 1024) ==  512);
+  }
+  WHEN ("Negative 'to' values")
+  {
+    REQUIRE(map(0,   0, 256, 0, -1024) ==     0);
+    REQUIRE(map(256, 0, 256, 0, -1024) == -1024);
+    REQUIRE(map(128, 0, 256, 0, -1024) ==  -512);
+  }
+}
