Adding test code for 'min'

Author: aentinger

test/CMakeLists.txt

@@ -25,6 +25,7 @@ set(TEST_TARGET ${CMAKE_PROJECT_NAME})
 
 set(TEST_SRCS
   src/Common/test_max.cpp
+  src/Common/test_min.cpp
   src/WCharacter/test_isHexadecimalDigit.cpp
   src/WCharacter/test_isSpace.cpp
   src/WCharacter/test_isUpperCase.cpp

test/src/Common/test_min.cpp

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2020 Arduino.  All rights reserved.
+ */
+
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#include <catch.hpp>
+
+#include <Common.h>
+
+/**************************************************************************************
+ * TEST CODE
+ **************************************************************************************/
+
+TEST_CASE ("Calling 'min(a,b)' with a < b", "[min-01]")
+{
+  WHEN("a > 0 and b > 0") REQUIRE(min(1,5)   ==  1);
+  WHEN("a < 0 and b > 0") REQUIRE(min(-1,5)  == -1);
+  WHEN("a < 0 and b < 0") REQUIRE(min(-5,-1) == -5);
+}
+
+TEST_CASE ("Calling 'min(a,b)' with a > b", "[min-02]")
+{
+  WHEN("a > 0 and b > 0") REQUIRE(min(5,1)   ==  1);
+  WHEN("a > 0 and b < 0") REQUIRE(min(5,-1)  == -1);
+  WHEN("a < 0 and b < 0") REQUIRE(min(-1,-5) == -5);
+}
+
+TEST_CASE ("Calling 'min(a,b)' with a == b", "[min-03]")
+{
+  WHEN("a = b > 0") REQUIRE(min(5,5)   ==  5);
+  WHEN("a = b < 0") REQUIRE(min(-5,-5) == -5);
+  WHEN("a = b = 0") REQUIRE(min(0,0)   ==  0);
+}
+
+TEST_CASE ("Calling 'min(a,b)' with type(a) != type(b)", "[min-04]")
+{
+  WHEN("type(A) = uint8_t, type(b) = uint16_t")
+  {
+    uint8_t  const a = 32;
+    uint16_t const b = 10;
+    REQUIRE(typeid(min(a,b)) == typeid(int));
+  }
+  WHEN("type(A) = uint16_t, type(b) = uint32_t")
+  {
+    uint16_t const a = 32;
+    uint32_t const b = 10;
+    REQUIRE(typeid(min(a,b)) == typeid(unsigned int));
+  }
+  WHEN("type(A) = uint32_t, type(b) = uint64_t")
+  {
+    uint32_t const a = 32;
+    uint64_t const b = 10;
+    REQUIRE(typeid(min(a,b)) == typeid(unsigned long));
+  }
+  WHEN("type(A) = int8_t, type(b) = int16_t")
+  {
+    int8_t  const a = -32;
+    int16_t const b = -10;
+    REQUIRE(typeid(min(a,b)) == typeid(int));
+  }
+  WHEN("type(A) = int16_t, type(b) = int32_t")
+  {
+    int16_t const a = -32;
+    int32_t const b = -10;
+    REQUIRE(typeid(min(a,b)) == typeid(int));
+  }
+  WHEN("type(A) = int32_t, type(b) = int64_t")
+  {
+    int32_t const a = -32;
+    int64_t const b = -10;
+    REQUIRE(typeid(min(a,b)) == typeid(long));
+  }
+}