From 3f4e18744d9e3b4d37de3a18dd3d6da6064e6a7d Mon Sep 17 00:00:00 2001
From: Hannes Kuchelmeister <hannes@kuchelmeister.org>
Date: Wed, 30 Dec 2020 16:18:19 +0100
Subject: [PATCH] add test functions

---
 cpp_template/calc.cpp      | 11 +++++++++++
 cpp_template/calc_test.cpp | 22 ++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 cpp_template/calc.cpp
 create mode 100644 cpp_template/calc_test.cpp

diff --git a/cpp_template/calc.cpp b/cpp_template/calc.cpp
new file mode 100644
index 0000000..065bd7a
--- /dev/null
+++ b/cpp_template/calc.cpp
@@ -0,0 +1,11 @@
+#include <math.h>
+ 
+// Get the Square root of a number. 
+double squareRoot(const double a) 
+    {
+    double b = sqrt(a);
+    if(b != b) // NaN check
+        { return -1.0; }
+    else
+        { return sqrt(a); }
+    }
diff --git a/cpp_template/calc_test.cpp b/cpp_template/calc_test.cpp
new file mode 100644
index 0000000..f771e7d
--- /dev/null
+++ b/cpp_template/calc_test.cpp
@@ -0,0 +1,22 @@
+#include "calc.cpp"
+#include <gtest/gtest.h>
+ 
+TEST(SquareRootTest, PositiveNos) 
+    { 
+    ASSERT_EQ(6, squareRoot(36.0));
+    ASSERT_EQ(18.0, squareRoot(324.0));
+    ASSERT_EQ(25.4, squareRoot(645.16));
+    ASSERT_EQ(0, squareRoot(0.0));
+    }
+ 
+TEST(SquareRootTest, NegativeNos) 
+    {
+    ASSERT_EQ(-1.0, squareRoot(-15.0));
+    ASSERT_EQ(-1.0, squareRoot(-0.2));
+    }
+ 
+int main(int argc, char **argv) 
+    {
+    testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+    }