Add trait tests

Cargo.toml

@@ -15,6 +15,9 @@ version = "1.0.0"
 js-sys = "0.3.20"
 wasm-bindgen = { version = "0.2.70", default-features = false }
 
+[dev-dependencies]
+static_assertions = "1"
+
 [target.'cfg(not(target_family = "wasm"))'.dev-dependencies]
 pollster = { version = "0.3", features = ["macro"] }
 

tests/traits.rs

@@ -0,0 +1,24 @@
+use std::error::Error;
+use std::fmt::{Debug, Display};
+use std::hash::Hash;
+use std::ops::{Add, AddAssign, Sub, SubAssign};
+use std::panic::{RefUnwindSafe, UnwindSafe};
+
+use static_assertions::{assert_impl_all, assert_not_impl_any};
+use web_time::{Duration, Instant, SystemTime, SystemTimeError};
+
+#[cfg(target_family = "wasm")]
+wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_browser);
+
+#[cfg_attr(not(target_family = "wasm"), test)]
+#[cfg_attr(target_family = "wasm", wasm_bindgen_test::wasm_bindgen_test)]
+const fn basic() {
+	assert_impl_all!(Instant: Clone, Copy, Debug, Hash, Eq, PartialEq, Ord, PartialOrd, Send, Sync, Unpin, RefUnwindSafe, UnwindSafe);
+	assert_impl_all!(Instant: Add<Duration>, AddAssign<Duration>, Sub<Duration>, SubAssign<Duration>);
+
+	assert_impl_all!(SystemTime: Clone, Copy, Debug, Hash, Eq, PartialEq, Ord, PartialOrd, Send, Sync, Unpin, RefUnwindSafe, UnwindSafe);
+	assert_impl_all!(SystemTime: Add<Duration>, AddAssign<Duration>, Sub<Duration>, SubAssign<Duration>);
+
+	assert_impl_all!(SystemTimeError: Clone, Debug, Display, Error, Send, Sync, Unpin, RefUnwindSafe, UnwindSafe);
+	assert_not_impl_any!(SystemTimeError: Copy, Hash, Eq, PartialEq, Ord, PartialOrd);
+}