From 4b7a1cb96a53b66ed030e85d9f364fd37fa2d2bd Mon Sep 17 00:00:00 2001
From: denes <denes@matetelki.com>
Date: Mon, 11 Nov 2019 15:50:58 +0100
Subject: [PATCH] build unit tests with catch2

---
 .gitmodules         |  3 +++
 CMakeLists.txt      | 12 ++++++++++--
 Catch2              |  1 +
 cpp_logger_test.cpp | 44 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 58 insertions(+), 2 deletions(-)
 create mode 100644 .gitmodules
 create mode 160000 Catch2
 create mode 100644 cpp_logger_test.cpp

diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b435c86
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "Catch2"]
+	path = Catch2
+	url = https://github.com/catchorg/Catch2
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 48033da..f064081 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,15 @@
 cmake_minimum_required (VERSION 3.10)
 project (CppLogger)
 
-# Using Catch2's benchmarking tools
-set(CATCH_HEADER_FILES Logger.hpp Singleton_DCLP.hpp ArgParser.hpp)
+option(BUILD_TESTS "Build unit tests with Catch2" OFF)
+
+set(HEADER_FILES Logger.hpp Singleton_DCLP.hpp ArgParser.hpp)
 add_executable(cpplogger main.cpp ${HEADER_FILES})
 set_target_properties(cpplogger PROPERTIES COMPILE_FLAGS "-ggdb")
+
+if (BUILD_TESTS)
+	set(CATCH_HEADER_FILE Catch2/single_include/catch2/catch.hpp)
+	add_executable(cpplogger_test cpp_logger_test.cpp ${HEADER_FILES} ${CATCH_HEADER_FILE})
+	target_include_directories(cpplogger_test PRIVATE . Catch2/single_include)
+	set_target_properties(cpplogger_test PROPERTIES COMPILE_FLAGS "-ggdb")
+endif()
diff --git a/Catch2 b/Catch2
new file mode 160000
index 0000000..930f49a
--- /dev/null
+++ b/Catch2
@@ -0,0 +1 @@
+Subproject commit 930f49a641aa6a495d264d7b5e7c007734da0b0c
diff --git a/cpp_logger_test.cpp b/cpp_logger_test.cpp
new file mode 100644
index 0000000..7a902c3
--- /dev/null
+++ b/cpp_logger_test.cpp
@@ -0,0 +1,44 @@
+// Let Catch provide main():
+#define CATCH_CONFIG_MAIN
+// #define CATCH_CONFIG_ENABLE_BENCHMARKING
+
+#include <sstream>
+
+#include <catch2/catch.hpp>
+
+#include <Logger.hpp>
+
+
+TEST_CASE( "Simple test" ) {
+
+	// setup
+	std::ostringstream oss;
+	Logger::getInstance()->setStream(&oss);
+
+
+	// simple usage
+	LOG  << "pretty weather" << END;
+	REQUIRE( oss.str() == "pretty weather\n" );
+
+	// chaining inserts
+	oss.str("");
+	const std::string s = "apple(s)";
+	const int i = 2;
+	LOG << "i have " << i << " " << s << END;
+	REQUIRE( oss.str() == "i have 2 apple(s)\n" );
+
+	// output is only written at END
+	oss.str("");
+	LOG  << 1;
+	LOG  << 2;
+	REQUIRE( oss.str() == "" );
+	LOG << END;
+	REQUIRE( oss.str() == "12\n" );
+	LOG  << 3;
+	REQUIRE( oss.str() == "12\n" );
+
+	oss.str("");
+	LOG << END;
+	REQUIRE( oss.str() == "3\n" );
+}
+