Use the testing backend for the C++ integration tests

.github/workflows/ci.yaml

@@ -209,7 +209,7 @@ jobs:
       uses: actions-rs/cargo@v1
       with:
           command: build
-          args: --lib -p sixtyfps-cpp
+          args: --lib -p sixtyfps-cpp --features testing
     - name: Run tests
       uses: actions-rs/cargo@v1
       with:

api/sixtyfps-cpp/Cargo.toml

@@ -17,8 +17,12 @@ crate-type = ["lib", "cdylib"]
 # In the future, this shouldn't be a default feature, but should be enabled by cmake
 default = ["sixtyfps-interpreter"]
 
+# Enable some function used by the integration tests
+testing = ["sixtyfps-rendering-backend-testing"]
+
 [dependencies]
 sixtyfps-corelib = { version = "=0.0.6", path="../../sixtyfps_runtime/corelib", features = ["ffi"] }
 sixtyfps-rendering-backend-default = { version = "=0.0.6", path="../../sixtyfps_runtime/rendering_backends/default" }
+sixtyfps-rendering-backend-testing = { version = "=0.0.6", path="../../sixtyfps_runtime/rendering_backends/testing", optional = true }
 sixtyfps-interpreter = { version = "=0.0.6", path="../../sixtyfps_runtime/interpreter", features = ["ffi"], optional = true }
 

api/sixtyfps-cpp/include/sixtyfps_testing.h

@@ -12,6 +12,11 @@ LICENSE END */
 #include <iostream>
 
 namespace sixtyfps::testing {
+
+inline void init() {
+    cbindgen_private::sixtyfps_testing_init_backend();
+}
+
 inline void mock_elapsed_time(int64_t time_in_ms)
 {
     cbindgen_private::sixtyfps_mock_elapsed_time(time_in_ms);

api/sixtyfps-cpp/lib.rs

@@ -56,3 +56,9 @@ pub unsafe extern "C" fn sixtyfps_register_font_from_path(
         },
     )
 }
+
+#[cfg(feature = "testing")]
+#[no_mangle]
+pub unsafe extern "C" fn sixtyfps_testing_init_backend() {
+    sixtyfps_rendering_backend_testing::init();
+}

tests/driver/cpp/Cargo.toml

@@ -12,6 +12,7 @@ name = "test-driver-cpp"
 
 [dev-dependencies]
 sixtyfps-compilerlib = { path = "../../../sixtyfps_compiler", features = ["cpp", "display-diagnostics"] }
+sixtyfps-cpp = { path = "../../../api/sixtyfps-cpp", features = ["testing"] }
 cc = "1.0.54"
 tempfile = "3"
 scopeguard = "1.1.0"

tests/driver/cpp/cppdriver.rs

@@ -48,7 +48,7 @@ pub fn test(testcase: &test_driver_lib::TestCase) -> Result<(), Box<dyn Error>>
     generated_cpp.write_all(
         b"#ifdef NDEBUG\n#undef NDEBUG\n#endif\n#include <assert.h>\n#include <cmath>\n#include <iostream>\n#include <sixtyfps_testing.h>\n",
     )?;
-    generated_cpp.write_all(b"int main() {\n")?;
+    generated_cpp.write_all(b"int main() {\n    sixtyfps::testing::init();\n")?;
     for x in test_driver_lib::extract_test_functions(&source).filter(|x| x.language_id == "cpp") {
         write!(generated_cpp, "  {{\n    {}\n  }}\n", x.source.replace("\n", "\n    "))?;
     }