Test features reverting

utils/wasm-builder/Cargo.toml

@@ -31,6 +31,7 @@ regex.workspace = true
 [dev-dependencies]
 wabt.workspace = true
 wasmi = { workspace = true, features = ["std"] }
+parity-wasm.workspace = true
 
 [features]
 metawasm = ["gmeta/codegen"]

utils/wasm-builder/test-program/Cargo.toml

@@ -15,3 +15,7 @@ gear-wasm-builder = { path = ".." }
 
 # To exclude this project from the outer workspace
 [workspace]
+
+[features]
+a = []
+b = []

utils/wasm-builder/test-program/src/lib.rs

@@ -4,6 +4,14 @@ include!("rebuild_test.rs");
 
 use gstd::{debug, msg};
 
+#[cfg(feature = "a")]
+#[no_mangle]
+extern "C" fn handle_reply() {}
+
+#[cfg(feature = "b")]
+#[no_mangle]
+extern "C" fn handle_signal() {}
+
 #[no_mangle]
 extern "C" fn handle() {
     debug!("handle()");
@@ -29,12 +37,7 @@ mod gtest_tests {
         let this_program = Program::current(&system);
 
         let res = this_program.send_bytes(123, "INIT");
-        assert!(res.contains(
-            &Log::builder()
-                .source(1)
-                .dest(123)
-                .payload_bytes([])
-        ));
+        assert!(res.contains(&Log::builder().source(1).dest(123).payload_bytes([])));
 
         let res = this_program.send_bytes(123, "Hi");
         assert!(res.contains(

utils/wasm-builder/tests/smoke.rs

@@ -121,3 +121,32 @@ fn no_infinite_build() {
 
     CargoRunner::new().args(["build"]).run();
 }
+
+#[ignore]
+#[test]
+fn features_tracking() {
+    #[track_caller]
+    fn read_export_entry(name: &str) -> Option<parity_wasm::elements::ExportEntry> {
+        parity_wasm::deserialize_file(format!(
+            "test-program/target/wasm32-unknown-unknown/{}/test_program.wasm",
+            if cfg!(debug_assertions) {
+                "debug"
+            } else {
+                "release"
+            }
+        ))
+        .unwrap()
+        .export_section()
+        .unwrap()
+        .entries()
+        .iter()
+        .find(|entry| entry.field() == name)
+        .cloned()
+    }
+
+    CargoRunner::new().args(["build", "--features=a"]).run();
+    assert!(read_export_entry("handle_reply").is_some());
+
+    CargoRunner::new().args(["build", "--features=b"]).run();
+    assert!(read_export_entry("handle_signal").is_some());
+}