Merge pull request #7765 from aaron-ang/more-mem-constant

more: constant memory initialization overhead

Cargo.lock

@@ -3031,6 +3031,7 @@ dependencies = [
  "clap",
  "crossterm",
  "nix",
+ "tempfile",
  "unicode-segmentation",
  "unicode-width 0.2.0",
  "uucore",

Cargo.toml

@@ -342,7 +342,6 @@ thiserror = "2.0.3"
 time = { version = "0.3.36" }
 unicode-segmentation = "1.11.0"
 unicode-width = "0.2.0"
-utf-8 = "0.7.6"
 utmp-classic = "0.1.6"
 uutils_term_grid = "0.7"
 walkdir = "2.5"

src/uu/more/Cargo.toml

@@ -33,3 +33,6 @@ crossterm = { workspace = true, features = ["use-dev-tty"] }
 [[bin]]
 name = "more"
 path = "src/main.rs"
+
+[dev-dependencies]
+tempfile = { workspace = true }

tests/by-util/test_more.rs

@@ -2,58 +2,60 @@
 //
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
-use std::io::IsTerminal;
-#[cfg(target_family = "unix")]
-use uutests::at_and_ucmd;
-use uutests::new_ucmd;
-use uutests::util::TestScenario;
-use uutests::util_name;
 
+use std::io::IsTerminal;
+
+use uutests::{at_and_ucmd, new_ucmd, util::TestScenario, util_name};
+
+#[cfg(unix)]
 #[test]
-fn test_more_no_arg() {
+fn test_no_arg() {
     if std::io::stdout().is_terminal() {
-        new_ucmd!().fails().stderr_contains("more: bad usage");
+        new_ucmd!()
+            .terminal_simulation(true)
+            .fails()
+            .stderr_contains("more: bad usage");
     }
 }
 
 #[test]
 fn test_valid_arg() {
     if std::io::stdout().is_terminal() {
-        let scene = TestScenario::new(util_name!());
+        let args_list: Vec<&[&str]> = vec![
-        let at = &scene.fixtures;
+            &["-c"],
-
+            &["--clean-print"],
-        let file = "test_file";
+            &["-p"],
-        at.touch(file);
+            &["--print-over"],
-
+            &["-s"],
-        scene.ucmd().arg(file).arg("-c").succeeds();
+            &["--squeeze"],
-        scene.ucmd().arg(file).arg("--print-over").succeeds();
+            &["-u"],
-
+            &["--plain"],
-        scene.ucmd().arg(file).arg("-p").succeeds();
+            &["-n", "10"],
-        scene.ucmd().arg(file).arg("--clean-print").succeeds();
+            &["--lines", "0"],
-
+            &["--number", "0"],
-        scene.ucmd().arg(file).arg("-s").succeeds();
+            &["-F", "10"],
-        scene.ucmd().arg(file).arg("--squeeze").succeeds();
+            &["--from-line", "0"],
-
+            &["-P", "something"],
-        scene.ucmd().arg(file).arg("-u").succeeds();
+            &["--pattern", "-1"],
-        scene.ucmd().arg(file).arg("--plain").succeeds();
+        ];
-
+        for args in args_list {
-        scene.ucmd().arg(file).arg("-n").arg("10").succeeds();
+            test_alive(args);
-        scene.ucmd().arg(file).arg("--lines").arg("0").succeeds();
+        }
-        scene.ucmd().arg(file).arg("--number").arg("0").succeeds();
-
-        scene.ucmd().arg(file).arg("-F").arg("10").succeeds();
-        scene
-            .ucmd()
-            .arg(file)
-            .arg("--from-line")
-            .arg("0")
-            .succeeds();
-
-        scene.ucmd().arg(file).arg("-P").arg("something").succeeds();
-        scene.ucmd().arg(file).arg("--pattern").arg("-1").succeeds();
     }
 }
 
+fn test_alive(args: &[&str]) {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let file = "test_file";
+    at.touch(file);
+
+    ucmd.args(args)
+        .arg(file)
+        .run_no_wait()
+        .make_assertion()
+        .is_alive();
+}
+
 #[test]
 fn test_invalid_arg() {
     if std::io::stdout().is_terminal() {
@@ -67,59 +69,46 @@ fn test_invalid_arg() {
 }
 
 #[test]
-fn test_argument_from_file() {
+fn test_file_arg() {
-    if std::io::stdout().is_terminal() {
-        let scene = TestScenario::new(util_name!());
-        let at = &scene.fixtures;
-
-        let file = "test_file";
-
-        at.write(file, "1\n2");
-
-        // output all lines
-        scene
-            .ucmd()
-            .arg("-F")
-            .arg("0")
-            .arg(file)
-            .succeeds()
-            .no_stderr()
-            .stdout_contains("1")
-            .stdout_contains("2");
-
-        // output only the second line
-        scene
-            .ucmd()
-            .arg("-F")
-            .arg("2")
-            .arg(file)
-            .succeeds()
-            .no_stderr()
-            .stdout_contains("2")
-            .stdout_does_not_contain("1");
-    }
-}
-
-#[test]
-fn test_more_dir_arg() {
     // Run the test only if there's a valid terminal, else do nothing
     // Maybe we could capture the error, i.e. "Device not found" in that case
     // but I am leaving this for later
     if std::io::stdout().is_terminal() {
-        new_ucmd!()
+        // Directory as argument
-            .arg(".")
+        let mut ucmd = TestScenario::new(util_name!()).ucmd();
+        ucmd.arg(".")
             .succeeds()
             .stderr_contains("'.' is a directory.");
+
+        // Single argument errors
+        let (at, mut ucmd) = at_and_ucmd!();
+        at.mkdir_all("folder");
+        ucmd.arg("folder")
+            .succeeds()
+            .stderr_contains("is a directory");
+
+        ucmd = TestScenario::new(util_name!()).ucmd();
+        ucmd.arg("nonexistent_file")
+            .succeeds()
+            .stderr_contains("No such file or directory");
+
+        // Multiple nonexistent files
+        ucmd = TestScenario::new(util_name!()).ucmd();
+        ucmd.arg("file2")
+            .arg("file3")
+            .succeeds()
+            .stderr_contains("file2")
+            .stderr_contains("file3");
     }
 }
 
 #[test]
 #[cfg(target_family = "unix")]
-fn test_more_invalid_file_perms() {
+fn test_invalid_file_perms() {
-    use std::fs::{Permissions, set_permissions};
-    use std::os::unix::fs::PermissionsExt;
-
     if std::io::stdout().is_terminal() {
+        use std::fs::{Permissions, set_permissions};
+        use std::os::unix::fs::PermissionsExt;
+
         let (at, mut ucmd) = at_and_ucmd!();
         let permissions = Permissions::from_mode(0o244);
         at.make_file("invalid-perms.txt");
@@ -129,89 +118,3 @@ fn test_more_invalid_file_perms() {
             .stderr_contains("permission denied");
     }
 }
-
-#[test]
-fn test_more_error_on_single_arg() {
-    if std::io::stdout().is_terminal() {
-        let ts = TestScenario::new("more");
-        ts.fixtures.mkdir_all("folder");
-        ts.ucmd()
-            .arg("folder")
-            .succeeds()
-            .stderr_contains("is a directory");
-        ts.ucmd()
-            .arg("file1")
-            .succeeds()
-            .stderr_contains("No such file or directory");
-    }
-}
-
-#[test]
-fn test_more_error_on_multiple_files() {
-    if std::io::stdout().is_terminal() {
-        let ts = TestScenario::new("more");
-        ts.fixtures.mkdir_all("folder");
-        ts.fixtures.make_file("file1");
-        ts.ucmd()
-            .arg("folder")
-            .arg("file2")
-            .arg("file1")
-            .succeeds()
-            .stderr_contains("folder")
-            .stderr_contains("file2")
-            .stdout_contains("file1");
-        ts.ucmd()
-            .arg("file2")
-            .arg("file3")
-            .succeeds()
-            .stderr_contains("file2")
-            .stderr_contains("file3");
-    }
-}
-
-#[test]
-fn test_more_pattern_found() {
-    if std::io::stdout().is_terminal() {
-        let scene = TestScenario::new(util_name!());
-        let at = &scene.fixtures;
-
-        let file = "test_file";
-
-        at.write(file, "line1\nline2");
-
-        // output only the second line "line2"
-        scene
-            .ucmd()
-            .arg("-P")
-            .arg("line2")
-            .arg(file)
-            .succeeds()
-            .no_stderr()
-            .stdout_does_not_contain("line1")
-            .stdout_contains("line2");
-    }
-}
-
-#[test]
-fn test_more_pattern_not_found() {
-    if std::io::stdout().is_terminal() {
-        let scene = TestScenario::new(util_name!());
-        let at = &scene.fixtures;
-
-        let file = "test_file";
-
-        let file_content = "line1\nline2";
-        at.write(file, file_content);
-
-        scene
-            .ucmd()
-            .arg("-P")
-            .arg("something")
-            .arg(file)
-            .succeeds()
-            .no_stderr()
-            .stdout_contains("Pattern not found")
-            .stdout_contains("line1")
-            .stdout_contains("line2");
-    }
-}