Test handling malformed ToolResult objects.

Test passing valid metadata fields.

Test handling tool_use_id that doesn't exist in session state.

Test _normalize_content with various input types.

Test that message_params override config defaults.

Test processing a response with both text and tool use.

Test processing a response with only text content.

Test processing a response with only tool use.

Test rendering dictionary message with text type.

Test rendering dictionary message with tool_use type.

Test rendering dictionary message with unknown type.

Test rendering empty conversation history.

Test rendering an empty string (should skip).

Test rendering messages with list content.

Test handling messages missing content field.

Test rendering multiple messages with different roles.

Test handling messages with None content.

Test rendering None message (should skip).

Test rendering single message in history.

Test rendering a simple string message.

Test rendering ToolResult with error.

Test that images are hidden when hide_screenshots is True.

Test rendering ToolResult with image.

Test rendering ToolResult with output.

Test rendering messages with unicode and special characters.

Test handling messages with unknown roles.

Test rendering extremely long messages.

Test that rendering errors are properly propagated.

Test reusing existing open event loop.

Test handling of multiple tool uses with text.

Test that text is preserved when tools are used.

Test handling of text-only responses.

Credential paths under $HOME and any .env file are unreadable.

Test handling error when setting event loop.

Test setup_state when BrowserTool initialization fails.

Test setup_state with completely empty session state.

Test that lambda functions are evaluated correctly.

Test setup_state when environment variables are missing.

Test setup_state when some keys already exist.

Test setup_state with corrupted session state.

Test setup_state when session state is read-only.

Bash and the editor see the same persistent directory.

Test that image blocks are skipped in conversation history.

Test that state persists across multiple render calls.

Test that tool_choice is explicitly set to auto.

Test rendering tool results from assistant messages.

Bonus over pyautogui.write(): chars with no ANSI keycode at all.

Printable chars must go through CGEventKeyboardSetUnicodeString so the active keyboard layout (Dvorak, AZERTY, ...) cannot remap them.

Small/solid images are legitimate file content, not failed screenshots.

Convert to Anthropic server tool format.

Convert to Anthropic server tool format.

Convert tool to API parameters using custom tool definition.