Path migration part 2: nu-test-support (#13329)

# Description
Part 2 of replacing `std::path` types with `nu_path` types added in
#13115. This PR targets `nu-test-support`.

crates/nu-command/src/system/run_external.rs

@@ -580,7 +580,7 @@ mod test {
         Playground::setup("test_expand_glob", |dirs, play| {
             play.with_files(&[Stub::EmptyFile("a.txt"), Stub::EmptyFile("b.txt")]);
 
-            let cwd = dirs.test();
+            let cwd = dirs.test().as_std_path();
 
             let actual = expand_glob("*.txt", cwd, Span::unknown(), &Signals::empty()).unwrap();
             let expected = &["a.txt", "b.txt"];

crates/nu-command/tests/commands/database/into_sqlite.rs

@@ -465,7 +465,7 @@ fn make_sqlite_db(dirs: &Dirs, nu_table: &str) -> PathBuf {
     );
 
     assert!(nucmd.status.success());
-    testdb_path
+    testdb_path.into()
 }
 
 fn insert_test_rows(dirs: &Dirs, nu_table: &str, sql_query: Option<&str>, expected: Vec<TestRow>) {

crates/nu-command/tests/commands/rm.rs

@@ -1,3 +1,4 @@
+use nu_path::AbsolutePath;
 use nu_test_support::fs::{files_exist_at, Stub::EmptyFile};
 use nu_test_support::nu;
 use nu_test_support::playground::Playground;
@@ -405,10 +406,10 @@ fn removes_file_after_cd() {
 }
 
 struct Cleanup<'a> {
-    dir_to_clean: &'a Path,
+    dir_to_clean: &'a AbsolutePath,
 }
 
-fn set_dir_read_only(directory: &Path, read_only: bool) {
+fn set_dir_read_only(directory: &AbsolutePath, read_only: bool) {
     let mut permissions = fs::metadata(directory).unwrap().permissions();
     permissions.set_readonly(read_only);
     fs::set_permissions(directory, permissions).expect("failed to set directory permissions");

crates/nu-command/tests/commands/source_env.rs

@@ -1,4 +1,3 @@
-use nu_test_support::fs::AbsolutePath;
 use nu_test_support::fs::Stub::{FileWithContent, FileWithContentToBeTrimmed};
 use nu_test_support::nu;
 use nu_test_support::pipeline;
@@ -8,17 +7,18 @@ use nu_test_support::playground::Playground;
 #[test]
 fn sources_also_files_under_custom_lib_dirs_path() {
     Playground::setup("source_test_1", |dirs, nu| {
-        let file = AbsolutePath::new(dirs.test().join("config.toml"));
-        let library_path = AbsolutePath::new(dirs.test().join("lib"));
+        let file = dirs.test().join("config.toml");
+        let library_path = dirs.test().join("lib");
 
-        nu.with_config(&file);
+        nu.with_config(file);
         nu.with_files(&[FileWithContent(
             "config.toml",
             &format!(
                 r#"
-                lib_dirs = ["{library_path}"]
+                lib_dirs = ["{}"]
                 skip_welcome_message = true
-            "#
+            "#,
+                library_path.as_os_str().to_str().unwrap(),
             ),
         )]);
 

crates/nu-command/tests/commands/ucp.rs

@@ -1,6 +1,6 @@
 use nu_test_support::fs::file_contents;
 use nu_test_support::fs::{
-    files_exist_at, AbsoluteFile,
+    files_exist_at,
     Stub::{EmptyFile, FileWithContent, FileWithPermission},
 };
 use nu_test_support::nu;
@@ -55,7 +55,7 @@ fn copies_the_file_inside_directory_if_path_to_copy_is_directory() {
 
 fn copies_the_file_inside_directory_if_path_to_copy_is_directory_impl(progress: bool) {
     Playground::setup("ucp_test_2", |dirs, _| {
-        let expected_file = AbsoluteFile::new(dirs.test().join("sample.ini"));
+        let expected_file = dirs.test().join("sample.ini");
         let progress_flag = if progress { "-p" } else { "" };
 
         // Get the hash of the file content to check integrity after copy.
@@ -64,13 +64,13 @@ fn copies_the_file_inside_directory_if_path_to_copy_is_directory_impl(progress:
             cwd: dirs.formats(),
             "cp {} ../formats/sample.ini {}",
             progress_flag,
-            expected_file.dir()
+            expected_file.parent().unwrap().as_os_str().to_str().unwrap(),
         );
 
         assert!(dirs.test().join("sample.ini").exists());
 
         // Check the integrity of the file.
-        let after_cp_hash = get_file_hash(expected_file);
+        let after_cp_hash = get_file_hash(expected_file.display());
         assert_eq!(first_hash, after_cp_hash);
     })
 }

crates/nu-command/tests/commands/use_.rs

@@ -1,4 +1,3 @@
-use nu_test_support::fs::AbsolutePath;
 use nu_test_support::fs::Stub::{FileWithContent, FileWithContentToBeTrimmed};
 use nu_test_support::nu;
 use nu_test_support::pipeline;
@@ -7,10 +6,10 @@ use nu_test_support::playground::Playground;
 #[test]
 fn use_module_file_within_block() {
     Playground::setup("use_test_1", |dirs, nu| {
-        let file = AbsolutePath::new(dirs.test().join("spam.nu"));
+        let file = dirs.test().join("spam.nu");
 
         nu.with_files(&[FileWithContent(
-            &file.to_string(),
+            file.as_os_str().to_str().unwrap(),
             r#"
                 export def foo [] {
                     echo "hello world"
@@ -37,10 +36,10 @@ fn use_module_file_within_block() {
 #[test]
 fn use_keeps_doc_comments() {
     Playground::setup("use_doc_comments", |dirs, nu| {
-        let file = AbsolutePath::new(dirs.test().join("spam.nu"));
+        let file = dirs.test().join("spam.nu");
 
         nu.with_files(&[FileWithContent(
-            &file.to_string(),
+            file.as_os_str().to_str().unwrap(),
             r#"
                 # this is my foo command
                 export def foo [