test(c-api) Restore the wasm-c-api test suite.

lib/c-api/tests/wasm_c_api_tests.rs

@@ -0,0 +1,18 @@
+mod test_c_helpers;
+
+use test_c_helpers::compile_with_cmake_and_run_test;
+
+#[test]
+fn test_wasm_c_api() {
+    let project_tests_dir = concat!(env!("CARGO_MANIFEST_DIR"), "/tests/wasm_c_api/");
+
+    let cmake_args = vec![
+        ".",
+        // We need something like this to get this working on Windows, but this doesn't seem
+        // quite right -- perhaps it's double escaping the quotes?
+        #[cfg(target_os = "windows")]
+        r#"-G "MinGW Makefiles""#,
+    ];
+
+    compile_with_cmake_and_run_test(project_tests_dir, cmake_args);
+}