Add desktop autotype unittests for windows

apps/desktop/desktop_native/autotype/Cargo.toml

@@ -9,6 +9,8 @@ publish.workspace = true
 anyhow = { workspace = true }
 
 [target.'cfg(windows)'.dependencies]
+mockall = "=0.13.1"
+serial_test = "=3.2.0"
 tracing.workspace = true
 windows = { workspace = true, features = [
     "Win32_UI_Input_KeyboardAndMouse",

apps/desktop/desktop_native/autotype/src/lib.rs

@@ -2,7 +2,7 @@ use anyhow::Result;
 
 #[cfg_attr(target_os = "linux", path = "linux.rs")]
 #[cfg_attr(target_os = "macos", path = "macos.rs")]
-#[cfg_attr(target_os = "windows", path = "windows.rs")]
+#[cfg_attr(target_os = "windows", path = "windows/mod.rs")]
 mod windowing;
 
 /// Gets the title bar string for the foreground window.
@@ -20,12 +20,13 @@ pub fn get_foreground_window_title() -> Result<String> {
 ///
 /// # Arguments
 ///
-/// * `input` must be an array of utf-16 encoded characters to insert.
+/// * `input` an array of utf-16 encoded characters to insert.
+/// * `keyboard_shortcut` a vector of valid shortcut keys: Control, Alt, Super, Shift, letters a - Z
 ///
 /// # Errors
 ///
 /// This function returns an `anyhow::Error` if there is any
-/// issue obtaining the window title. Detailed reasons will
+/// issue in typing the input. Detailed reasons will
 /// vary based on platform implementation.
 pub fn type_input(input: Vec<u16>, keyboard_shortcut: Vec<String>) -> Result<()> {
     windowing::type_input(input, keyboard_shortcut)

apps/desktop/desktop_native/autotype/src/windows/mod.rs

@@ -0,0 +1,41 @@
+use anyhow::Result;
+use tracing::debug;
+use windows::Win32::Foundation::{GetLastError, SetLastError, WIN32_ERROR};
+
+mod type_input;
+mod window_title;
+
+/// The error code from Win32 API that represents a non-error.
+const WIN32_SUCCESS: WIN32_ERROR = WIN32_ERROR(0);
+
+/// `ErrorOperations` provides an interface to the Win32 API for dealing with
+/// win32 errors.
+#[cfg_attr(test, mockall::automock)]
+trait ErrorOperations {
+    /// https://learn.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-setlasterror
+    fn set_last_error(err: u32) {
+        debug!(err, "Calling SetLastError");
+        unsafe {
+            SetLastError(WIN32_ERROR(err));
+        }
+    }
+
+    /// https://learn.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror
+    fn get_last_error() -> WIN32_ERROR {
+        let last_err = unsafe { GetLastError() };
+        debug!("GetLastError(): {}", last_err.to_hresult().message());
+        last_err
+    }
+}
+
+/// Default implementation for Win32 API errors.
+struct Win32ErrorOperations;
+impl ErrorOperations for Win32ErrorOperations {}
+
+pub fn get_foreground_window_title() -> Result<String> {
+    window_title::get_foreground_window_title()
+}
+
+pub fn type_input(input: Vec<u16>, keyboard_shortcut: Vec<String>) -> Result<()> {
+    type_input::type_input(input, keyboard_shortcut)
+}