234 (#320)

* #237 test: add comprehensive tests for turnkey domain

Added complete test coverage for src/turnkey/domain.rs:

- Added 17 unit tests for TurnkeyErrorKind and TurnkeyError
- Added 10 doctests for all public types and methods
- Added module-level documentation
- Tested Display implementations for both enum and struct
- Tested Clone, PartialEq, Eq traits
- Tested TurnkeyError::new with various input types
- Verified map_turnkey_kind mappings

Test results:
- Unit tests: 386 passed (was 367, +19)
- Doctests: 10 for turnkey::domain module
- Clippy: no warnings
- Formatting: compliant with rustfmt

Coverage:
- TurnkeyErrorKind: 100%
- TurnkeyError: 100%
- map_turnkey_kind: 100%

* #236 test: add comprehensive tests for turnkey conversions

Added complete test coverage for src/turnkey/conversions.rs:

- Added 14 unit tests for From trait implementations
- Added 3 doctests for both conversion methods
- Added module-level documentation with examples
- Tested all TurnkeyErrorKind to AppErrorKind conversions
- Tested all TurnkeyError to AppError conversions
- Verified message preservation (empty, unicode, long messages)
- Verified correct error kind mapping for all variants

Test results:
- Unit tests: 45 turnkey tests passed (was 31, +14)
- Doctests: 3 for turnkey::conversions module
- Clippy: no warnings
- Formatting: compliant with rustfmt

Coverage:
- From<TurnkeyErrorKind> for AppErrorKind: 100%
- From<TurnkeyError> for AppError: 100%

* #235 test: add comprehensive tests for browser console extension

Added complete test coverage for src/frontend/browser_console_ext.rs:

- Added 9 unit tests for BrowserConsoleExt trait implementations
- Added 2 doctests for public trait methods
- Added module-level documentation with platform support info
- Tested to_js_value on native targets (returns UnsupportedTarget)
- Tested log_to_browser_console on native targets
- Tested all error kinds with BrowserConsoleExt methods
- Tested edge cases (empty messages, unicode messages)

Test results:
- Unit tests: 21 frontend tests passed (was 12, +9)
- Doctests: 2 passed, 2 ignored (WASM-specific)
- Clippy: no warnings
- Formatting: compliant with rustfmt

Coverage:
- BrowserConsoleExt trait: 100% (native paths)
- ErrorResponse impl: 100% (native paths)
- AppError impl: 100% (native paths)

* #234 test: add comprehensive tests for browser console error

Added complete test coverage for src/frontend/browser_console_error.rs:

- Added 7 unit tests for error variants
- Added 9 doctests for enum and all variants
- Added module-level documentation with error variant overview
- Added Clone derive to BrowserConsoleError
- Tested context method for all variants
- Tested Display implementation
- Tested edge cases (empty messages, unicode, special characters)
- Tested PartialEq and Clone traits

Test results:
- Unit tests: 28 frontend tests passed (was 21, +7)
- Doctests: 9 for browser_console_error module
- Clippy: no warnings
- Formatting: compliant with rustfmt

Coverage:
- BrowserConsoleError enum: 100%
- context() method: 100%

* #234 test: add comprehensive coverage for src/frontend/browser_console_error.rs

- Test Clone trait for all variants
- Test PartialEq with different variants and messages
- Test Debug trait format
- Test context() for unit variants returns None
- Test context() for variants with messages
- Coverage: 90% -> 98.28%

Author: RAprogramm

src/frontend/browser_console_error.rs

@@ -193,3 +193,73 @@ impl BrowserConsoleError {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn clone_creates_identical_copy() {
+        let err1 = BrowserConsoleError::Serialization {
+            message: "test".to_string()
+        };
+        let err2 = err1.clone();
+        assert_eq!(err1, err2);
+
+        let err3 = BrowserConsoleError::ConsoleMethodNotCallable;
+        let err4 = err3.clone();
+        assert_eq!(err3, err4);
+    }
+
+    #[test]
+    fn context_returns_none_for_unit_variants() {
+        assert_eq!(
+            BrowserConsoleError::ConsoleMethodNotCallable.context(),
+            None
+        );
+        assert_eq!(BrowserConsoleError::UnsupportedTarget.context(), None);
+    }
+
+    #[test]
+    fn context_returns_message_for_serialization() {
+        let err = BrowserConsoleError::Serialization {
+            message: "JSON parse error".to_string()
+        };
+        assert_eq!(err.context(), Some("JSON parse error"));
+    }
+
+    #[test]
+    fn context_returns_message_for_console_invocation() {
+        let err = BrowserConsoleError::ConsoleInvocation {
+            message: "TypeError: null reference".to_string()
+        };
+        assert_eq!(err.context(), Some("TypeError: null reference"));
+    }
+
+    #[test]
+    fn partial_eq_compares_variants_correctly() {
+        let serialization1 = BrowserConsoleError::Serialization {
+            message: "error1".to_string()
+        };
+        let serialization2 = BrowserConsoleError::Serialization {
+            message: "error1".to_string()
+        };
+        let serialization3 = BrowserConsoleError::Serialization {
+            message: "error2".to_string()
+        };
+
+        assert_eq!(serialization1, serialization2);
+        assert_ne!(serialization1, serialization3);
+        assert_ne!(serialization1, BrowserConsoleError::UnsupportedTarget);
+    }
+
+    #[test]
+    fn debug_format_includes_variant_and_message() {
+        let err = BrowserConsoleError::ConsoleUnavailable {
+            message: "console is undefined".to_string()
+        };
+        let debug_str = format!("{err:?}");
+        assert!(debug_str.contains("ConsoleUnavailable"));
+        assert!(debug_str.contains("console is undefined"));
+    }
+}