windows: Fix tests on Windows (#22616)

Release Notes:

- N/A

---------

Co-authored-by: Mikayla <mikayla.c.maki@gmail.com>

crates/util/src/util.rs

@@ -28,6 +28,8 @@ use unicase::UniCase;
 use anyhow::{anyhow, Context as _};
 
 pub use take_until::*;
+#[cfg(any(test, feature = "test-support"))]
+pub use util_macros::{separator, uri};
 
 #[macro_export]
 macro_rules! debug_panic {
@@ -41,6 +43,50 @@ macro_rules! debug_panic {
     };
 }
 
+/// A macro to add "C:" to the beginning of a path literal on Windows, and replace all
+/// the separator from `/` to `\`.
+/// But on non-Windows platforms, it will return the path literal as is.
+///
+/// # Examples
+/// ```rust
+/// use util::path;
+///
+/// let path = path!("/Users/user/file.txt");
+/// #[cfg(target_os = "windows")]
+/// assert_eq!(path, "C:\\Users\\user\\file.txt");
+/// #[cfg(not(target_os = "windows"))]
+/// assert_eq!(path, "/Users/user/file.txt");
+/// ```
+#[cfg(all(any(test, feature = "test-support"), target_os = "windows"))]
+#[macro_export]
+macro_rules! path {
+    ($path:literal) => {
+        concat!("C:", util::separator!($path))
+    };
+}
+
+/// A macro to add "C:" to the beginning of a path literal on Windows, and replace all
+/// the separator from `/` to `\`.
+/// But on non-Windows platforms, it will return the path literal as is.
+///
+/// # Examples
+/// ```rust
+/// use util::path;
+///
+/// let path = path!("/Users/user/file.txt");
+/// #[cfg(target_os = "windows")]
+/// assert_eq!(path, "C:\\Users\\user\\file.txt");
+/// #[cfg(not(target_os = "windows"))]
+/// assert_eq!(path, "/Users/user/file.txt");
+/// ```
+#[cfg(all(any(test, feature = "test-support"), not(target_os = "windows")))]
+#[macro_export]
+macro_rules! path {
+    ($path:literal) => {
+        $path
+    };
+}
+
 pub fn truncate(s: &str, max_chars: usize) -> &str {
     match s.char_indices().nth(max_chars) {
         None => s,