diff options
Diffstat (limited to 'macros')
| -rw-r--r-- | macros/Cargo.toml | 1 | ||||
| -rw-r--r-- | macros/src/libs/intertrait_macros/gen_caster.rs | 57 |
2 files changed, 53 insertions, 5 deletions
diff --git a/macros/Cargo.toml b/macros/Cargo.toml index a2ed87b..2434028 100644 --- a/macros/Cargo.toml +++ b/macros/Cargo.toml @@ -33,3 +33,4 @@ syrette = { version = "0.4.1", path = ".." } mockall = "0.11.1" pretty_assertions = "1.3.0" syn = { version = "1.0.96", features = ["full", "extra-traits"] } +test_util_macros = { path = "../test_util_macros" } diff --git a/macros/src/libs/intertrait_macros/gen_caster.rs b/macros/src/libs/intertrait_macros/gen_caster.rs index a76bb52..c2fa226 100644 --- a/macros/src/libs/intertrait_macros/gen_caster.rs +++ b/macros/src/libs/intertrait_macros/gen_caster.rs @@ -28,7 +28,7 @@ pub fn generate_caster( sync: bool, ) -> TokenStream { - let fn_ident = create_caster_fn_ident(); + let fn_ident = create_caster_fn_ident(Uuid::new_v4()); let new_caster = if sync { quote! { @@ -86,18 +86,65 @@ pub fn generate_caster( } } -fn create_caster_fn_ident() -> Ident +fn create_caster_fn_ident(uuid: impl IUuid) -> Ident { let buf = &mut [0u8; FN_BUF_LEN]; buf[..CASTER_FN_NAME_PREFIX.len()].copy_from_slice(CASTER_FN_NAME_PREFIX); - Uuid::new_v4() - .to_simple() - .encode_lower(&mut buf[CASTER_FN_NAME_PREFIX.len()..]); + uuid.encode_simple_lower_into(&mut buf[CASTER_FN_NAME_PREFIX.len()..]); let fn_name = from_utf8(&buf[..FN_BUF_LEN]).expect("Created caster function name is not UTF-8"); format_ident!("{}", fn_name) } + +/// Simple interface for `Uuid`. +/// +/// Created for ease of testing the [`create_caster_fn_ident`] function. +/// +/// [`Uuid`]: uuid::Uuid +#[cfg_attr(test, mockall::automock)] +trait IUuid +{ + /// Writes the Uuid as a simple lower-case string to `buf`. + fn encode_simple_lower_into(self, buf: &mut [u8]); +} + +impl IUuid for Uuid +{ + fn encode_simple_lower_into(self, buf: &mut [u8]) + { + self.to_simple().encode_lower(buf); + } +} + +#[cfg(test)] +mod tests +{ + use pretty_assertions::assert_eq; + use test_util_macros::repeat_char; + + use super::*; + + #[test] + fn can_create_caster_fn_ident() + { + let mut uuid_mock = MockIUuid::new(); + + uuid_mock + .expect_encode_simple_lower_into() + .return_once(|buf| { + for index in 0..(FN_BUF_LEN - 2) { + buf[index] = b'f'; + } + }) + .once(); + + assert_eq!( + create_caster_fn_ident(uuid_mock), + format_ident!(concat!("__", repeat_char!('f', 32))) + ); + } +} |