Tests to ensure common and auto trait presence

Author: CAD97

Cargo.toml

@@ -17,6 +17,7 @@ serde = { version = "1.0", optional = true, default_features = false }
 
 [dev-dependencies]
 serde_test = "1.0"
+static_assertions = "1.1"
 
 [[test]]
 name = "serde"

tests/auto_traits.rs

@@ -0,0 +1,18 @@
+use {
+    static_assertions::*,
+    std::{
+        fmt::Debug,
+        hash::Hash,
+        marker::{Send, Sync},
+        panic::{RefUnwindSafe, UnwindSafe},
+    },
+    text_size::*,
+};
+
+// auto traits
+assert_impl_all!(TextSize: Send, Sync, Unpin, UnwindSafe, RefUnwindSafe);
+assert_impl_all!(TextRange: Send, Sync, Unpin, UnwindSafe, RefUnwindSafe);
+
+// common traits
+assert_impl_all!(TextSize: Copy, Debug, Default, Hash, Ord);
+assert_impl_all!(TextRange: Copy, Debug, Default, Hash, Eq);