Add more tests for diagnostic_source

tests/test_diagnostic_source_macro.rs

@@ -6,15 +6,56 @@ struct AnErr;
 
 #[derive(Debug, miette::Diagnostic, thiserror::Error)]
 #[error("TestError")]
-struct TestError {
+struct TestStructError {
     #[diagnostic_source]
     asdf_inner_foo: AnErr,
 }
 
+#[derive(Debug, miette::Diagnostic, thiserror::Error)]
+#[error("TestError")]
+enum TestEnumError {
+    Without,
+    WithTuple(#[diagnostic_source] AnErr),
+    WithStruct {
+        #[diagnostic_source]
+        inner: AnErr,
+    },
+}
+
+#[derive(Debug, miette::Diagnostic, thiserror::Error)]
+#[error("TestError")]
+struct TestTupleError(#[diagnostic_source] AnErr);
+
+#[derive(Debug, miette::Diagnostic, thiserror::Error)]
+#[error("TestError")]
+struct TestBoxedError(#[diagnostic_source] Box<dyn Diagnostic>);
+
+#[derive(Debug, miette::Diagnostic, thiserror::Error)]
+#[error("TestError")]
+struct TestArcedError(#[diagnostic_source] std::sync::Arc<dyn Diagnostic>);
+
 #[test]
 fn test_diagnostic_source() {
-    let error = TestError {
+    let error = TestStructError {
         asdf_inner_foo: AnErr,
     };
     assert!(error.diagnostic_source().is_some());
+
+    let error = TestEnumError::Without;
+    assert!(error.diagnostic_source().is_none());
+
+    let error = TestEnumError::WithTuple(AnErr);
+    assert!(error.diagnostic_source().is_some());
+
+    let error = TestEnumError::WithStruct { inner: AnErr };
+    assert!(error.diagnostic_source().is_some());
+
+    let error = TestTupleError(AnErr);
+    assert!(error.diagnostic_source().is_some());
+
+    let error = TestBoxedError(Box::new(AnErr));
+    assert!(error.diagnostic_source().is_some());
+
+    let error = TestArcedError(std::sync::Arc::new(AnErr));
+    assert!(error.diagnostic_source().is_some());
 }