Adding Catch2 as submodule, and abandoning main.cpp

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "Catch2"]
+	path = Catch2
+	url = https://github.com/catchorg/Catch2.git

CMakeLists.txt

@@ -1,6 +1,7 @@
 cmake_minimum_required (VERSION 3.10)
 project (PerformanceMeasuring)
 
-set(HEADER_FILES dummy_lib.hpp)
+set(HEADER_FILES dummy_lib.hpp Catch2/single_include/catch2/catch.hpp)
 
-add_executable(performance_measuring main.cpp ${HEADER_FILES})
+add_executable(performance_measuring catch2_test1.cpp ${HEADER_FILES})
+target_include_directories(performance_measuring PRIVATE . Catch2/single_include)

Catch2

@@ -0,0 +1 @@
+Subproject commit 815f99541dc352c4adbb2f8474f7f67108a830d2

catch2_test1.cpp

@@ -0,0 +1,22 @@
+// Let Catch provide main():
+#define CATCH_CONFIG_MAIN
+
+#include <catch2/catch.hpp>
+
+#include <dummy_lib.hpp>
+
+std::vector<int> generate_random_numbers(int n, int min, int max)
+{
+	std::srand(std::time(nullptr));
+	std::vector<int> v(n);
+	for (int i = 0; i < n; ++i)
+		v[i] = min + std::rand() / ((RAND_MAX + 1u)/max);
+
+	return v;
+}
+
+TEST_CASE( "Simple test" ) {
+	std::vector<int> v = { 1, 2, 3, 1};
+	int r = performance_measuring::compute(v);
+	REQUIRE( r == 2 );
+}

main.cpp

@@ -1,30 +0,0 @@
-#include <cstdlib>
-#include <ctime>
-
-#include <vector>
-
-#include "dummy_lib.hpp"
-
-
-std::vector<int> generate_random_numbers(int n, int min, int max)
-{
-	std::srand(std::time(nullptr));
-	std::vector<int> v(n);
-	for (int i = 0; i < n; ++i)
-		v[i] = min + std::rand() / ((RAND_MAX + 1u)/max);
-
-	return v;
-}
-
-int main(int /*argc*/, char* /*argv*/[])
-{
-	std::vector<int> v = generate_random_numbers(10000, 0, 100);
-
-	// How many times does the smallest element occurst in the vector?
-
-	int r = performance_measuring::compute(v);
-
-	(void)r;
-
-	return EXIT_SUCCESS;
-}