fn test_rust_call()

in uniffi_core/src/ffi/rustcalls.rs [230:280]

• 43 lines of code
• 5 McCabe index (conditional complexity)

    fn test_rust_call() {
        // Successful call
        let mut status = RustCallStatus::default();
        let return_value = rust_call(&mut status, || {
            <Result<i8, TestError> as LowerReturn<UniFfiTag>>::lower_return(Ok(100))
        });

        assert_eq!(status.code, RustCallStatusCode::Success);
        assert_eq!(return_value, 100);

        // Successful call that returns an Err value
        let mut status = RustCallStatus::default();
        rust_call(&mut status, || {
            <Result<i8, TestError> as LowerReturn<UniFfiTag>>::lower_return(Err(TestError(
                "Error".into(),
            )))
        });
        assert_eq!(status.code, RustCallStatusCode::Error);
        assert_eq!(
            <TestError as Lift<UniFfiTag>>::try_lift(ManuallyDrop::into_inner(status.error_buf))
                .unwrap(),
            TestError("Error".to_owned())
        );

        // Internal error while trying to make the call
        let mut status = RustCallStatus::default();
        rust_call(&mut status, || {
            <Result<i8, TestError> as LowerReturn<UniFfiTag>>::handle_failed_lift(LiftArgsError {
                arg_name: "foo",
                error: anyhow!("invalid handle"),
            })
        });
        assert_eq!(status.code, RustCallStatusCode::UnexpectedError);
        assert_eq!(
            <String as Lift<UniFfiTag>>::try_lift(ManuallyDrop::into_inner(status.error_buf))
                .unwrap(),
            "Failed to convert arg 'foo': invalid handle"
        );

        // Panic inside the call
        let mut status = RustCallStatus::default();
        rust_call(&mut status, || -> Result<i8, RustCallError> {
            panic!("I crashed")
        });
        assert_eq!(status.code, RustCallStatusCode::UnexpectedError);
        assert_eq!(
            <String as Lift<UniFfiTag>>::try_lift(ManuallyDrop::into_inner(status.error_buf))
                .unwrap(),
            "I crashed"
        );
    }