From f2900dc9b3e05c8bb58e48e055e275176f548253 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Micha=C3=ABl=20Celerier?=
 <jeanmichael.celerier@gmail.com>
Date: Fri, 15 Nov 2024 16:33:46 -0500
Subject: [PATCH] [tests] Add basic catch2 test infrastructure

---
 cmake/avendish.tests.cmake | 24 ++++++++++++++++++++++++
 tests/objects/gain.cpp     | 17 +++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 tests/objects/gain.cpp

diff --git a/cmake/avendish.tests.cmake b/cmake/avendish.tests.cmake
index bf1b859e..3467e207 100644
--- a/cmake/avendish.tests.cmake
+++ b/cmake/avendish.tests.cmake
@@ -10,7 +10,28 @@ function(avnd_add_executable_test theTarget theFile)
   avnd_common_setup("" "${theTarget}")
 endfunction()
 
+function(avnd_add_catch_test theTarget theFile)
+  add_executable("${theTarget}" "${theFile}")
+  avnd_common_setup("" "${theTarget}")
+  target_link_libraries("${theTarget}" PRIVATE Catch2::Catch2WithMain)
+endfunction()
+
 if(BUILD_TESTING)
+  if(NOT TARGET Catch2::Catch2WithMain)
+    FetchContent_Declare(
+        Catch2
+        GIT_REPOSITORY https://github.com/catchorg/Catch2.git
+        GIT_TAG        v3.4.0
+    )
+    
+    FetchContent_MakeAvailable(Catch2)
+    if(NOT TARGET Catch2::Catch2WithMain)
+        message(WARNING "libremidi: Catch2::Catch2WithMain target not found")
+        return()
+    endif()
+  endif()
+
+
   avnd_add_static_test(test_introspection tests/test_introspection.cpp)
   avnd_add_static_test(test_introspection_rec tests/test_introspection_rec.cpp)
   avnd_add_static_test(test_predicate tests/test_predicate.cpp)
@@ -21,4 +42,7 @@ if(BUILD_TESTING)
   avnd_add_static_test(test_index_in_struct tests/test_index_in_struct.cpp)
 
   avnd_add_executable_test(test_introspection_many tests/test_introspection_many.cpp)
+
+  avnd_add_catch_test(test_gain tests/objects/gain.cpp)
 endif()
+
diff --git a/tests/objects/gain.cpp b/tests/objects/gain.cpp
new file mode 100644
index 00000000..ead596ec
--- /dev/null
+++ b/tests/objects/gain.cpp
@@ -0,0 +1,17 @@
+#include <catch2/catch_all.hpp>
+
+#include <examples/Advanced/Utilities/Gain.hpp>
+TEST_CASE("Gain test", "[gain]")
+{
+  ao::Gain gain;
+  GIVEN("Correct input")
+  {
+    ao::Gain::inputs inputs;
+    inputs.gain.value = 0.5f;
+    THEN("Correct output")
+    {
+        double res = gain(1.5, inputs);
+        REQUIRE(res == 1.5 * 0.5);
+    }
+  }
+}