refactor(tests): restructure windows commandline tests for better readability

- Extract test helpers into nested functions to reduce duplication
- Rename test functions to be more descriptive
- Group related test cases together

wfassoc/src/extra/windows.rs

@@ -205,7 +205,7 @@ impl Drop for Icon {
 
 // region: Windows Commandline
 
-// region Cmd Lexer
+// region: Cmd Lexer
 
 /// The lexer for Windows commandline argument split.
 ///

wfassoc/tests/extra_windows.rs

@@ -1,24 +1,25 @@
 use wfassoc::extra::windows::*;
 
-fn test_cmd_args_ex(s: &str, probe: &[&'static str]) {
-    let rv = CmdArgs::new(s);
-    let inner = rv.get_inner();
-    assert_eq!(inner.len(), probe.len());
-
-    let n = inner.len();
-    for i in 0..n {
-        assert_eq!(inner[i].get_inner(), probe[i]);
-    }
-}
-
 #[test]
 fn test_cmd_args() {
+    // Declare tester
+    fn tester(s: &str, probe: &[&'static str]) {
+        let rv = CmdArgs::new(s);
+        let inner = rv.get_inner();
+        assert_eq!(inner.len(), probe.len());
+
+        let n = inner.len();
+        for i in 0..n {
+            assert_eq!(inner[i].get_inner(), probe[i]);
+        }
+    }
+
     // Normal cases
-    test_cmd_args_ex(
+    tester(
         "MyApp.exe --config ppic.toml",
         &["MyApp.exe", "--config", "ppic.toml"],
     );
-    test_cmd_args_ex(
+    tester(
         r#""C:\Program Files\MyApp\MyApp.exe" --config ppic.toml"#,
         &[
             r#"C:\Program Files\MyApp\MyApp.exe"#,
@@ -28,40 +29,62 @@ fn test_cmd_args() {
     );
 
     // Microsoft shitty cases.
-    test_cmd_args_ex(r#""abc" d e"#, &[r#"abc"#, r#"d"#, r#"e"#]);
-    test_cmd_args_ex(r#"a\\b d"e f"g h"#, &[r#"a\\b"#, r#"de fg"#, r#"h"#]);
-    test_cmd_args_ex(r#"a\\\"b c d"#, &[r#"a\"b"#, r#"c"#, r#"d"#]);
-    test_cmd_args_ex(r#"a\\\\"b c" d e"#, &[r#"a\\b c"#, r#"d"#, r#"e"#]);
-    test_cmd_args_ex(r#"a"b"" c d"#, &[r#"ab" c d"#]);
+    tester(r#""abc" d e"#, &[r#"abc"#, r#"d"#, r#"e"#]);
+    tester(r#"a\\b d"e f"g h"#, &[r#"a\\b"#, r#"de fg"#, r#"h"#]);
+    tester(r#"a\\\"b c d"#, &[r#"a\"b"#, r#"c"#, r#"d"#]);
+    tester(r#"a\\\\"b c" d e"#, &[r#"a\\b c"#, r#"d"#, r#"e"#]);
+    tester(r#"a"b"" c d"#, &[r#"ab" c d"#]);
 }
 
 #[test]
 fn test_cmd_arg() {
-    let rv = CmdArg::new(r#""C:\Program Files\MyApp\MyApp.exe""#);
-    assert!(rv.is_ok());
-    assert_eq!(rv.unwrap().get_inner(), r#"C:\Program Files\MyApp\MyApp.exe"#);
+    // Declare tester
+    fn ok_tester(s: &str, probe: &str) {
+        let rv = CmdArg::new(s);
+        assert!(rv.is_ok());
+        let rv = rv.unwrap();
+        assert_eq!(rv.get_inner(), probe);
+    }
+    fn err_tester(s: &str) {
+        let rv = CmdArg::new(s);
+        assert!(rv.is_err());
+    }
 
-    let rv = CmdArg::new("MyApp.exe --config ppic.toml");
-    assert!(rv.is_err());
-
-    let rv = CmdArg::new("");
-    assert!(rv.is_err());
-}
-
-#[test]
-fn test_quote_cmd_arg() {
-    let rv = CmdArg::with_inner(r#"C:\Program Files\MyApp\MyApp.exe"#).to_quoted_string(true);
-    assert_eq!(rv, r#""C:\Program Files\MyApp\MyApp.exe""#)
-}
-
-#[test]
-fn test_quote_cmd_args() {
-    let args = [
+    // Normal test
+    ok_tester(
+        r#""C:\Program Files\MyApp\MyApp.exe""#,
         r#"C:\Program Files\MyApp\MyApp.exe"#,
-        "--config",
-        "ppic.toml",
-    ];
-    let rv = CmdArgs::with_inner(args.iter().map(|s| CmdArg::with_inner(s))).to_quoted_string();
-    assert_eq!(rv, r#""C:\Program Files\MyApp\MyApp.exe" --config ppic.toml"#);
+    );
+    err_tester("MyApp.exe --config ppic.toml");
+    err_tester("");
 }
 
+#[test]
+fn test_cmd_arg_quoted_string() {
+    fn tester(s: &str, probe: &str) {
+        let rv = CmdArg::with_inner(s);
+        assert_eq!(rv.to_quoted_string(true), probe);
+    }
+
+    tester(
+        r#"C:\Program Files\MyApp\MyApp.exe"#,
+        r#""C:\Program Files\MyApp\MyApp.exe""#,
+    );
+}
+
+#[test]
+fn test_cmd_args_quoted_string() {
+    fn tester(args: &[&str], probe: &str) {
+        let rv = CmdArgs::with_inner(args.iter().map(|s| CmdArg::with_inner(s)));
+        assert_eq!(rv.to_quoted_string(), probe);
+    }
+
+    tester(
+        &[
+            r#"C:\Program Files\MyApp\MyApp.exe"#,
+            "--config",
+            "ppic.toml",
+        ],
+        r#""C:\Program Files\MyApp\MyApp.exe" --config ppic.toml"#,
+    );
+}