tests ~ reorganize tests

tests/by-util/test_chgrp.rs

@@ -0,0 +1,159 @@
+use crate::common::util::*;
+use rust_users::*;
+
+#[test]
+fn test_invalid_option() {
+    new_ucmd!().arg("-w").arg("/").fails();
+}
+
+static DIR: &'static str = "/tmp";
+
+#[test]
+fn test_invalid_group() {
+    new_ucmd!()
+        .arg("__nosuchgroup__")
+        .arg("/")
+        .fails()
+        .stderr_is("chgrp: invalid group: __nosuchgroup__");
+}
+
+#[test]
+fn test_1() {
+    if get_effective_gid() != 0 {
+        new_ucmd!()
+            .arg("bin")
+            .arg(DIR)
+            .fails()
+            .stderr_is("chgrp: changing group of '/tmp': Operation not permitted (os error 1)");
+    }
+}
+
+#[test]
+fn test_fail_silently() {
+    if get_effective_gid() != 0 {
+        for opt in &["-f", "--silent", "--quiet"] {
+            new_ucmd!()
+                .arg(opt)
+                .arg("bin")
+                .arg(DIR)
+                .run()
+                .fails_silently();
+        }
+    }
+}
+
+#[test]
+fn test_preserve_root() {
+    // It's weird that on OS X, `realpath /etc/..` returns '/private'
+    for d in &[
+        "/",
+        "/////tmp///../../../../",
+        "../../../../../../../../../../../../../../",
+        "./../../../../../../../../../../../../../../",
+    ] {
+        new_ucmd!()
+            .arg("--preserve-root")
+            .arg("-R")
+            .arg("bin").arg(d)
+            .fails()
+            .stderr_is("chgrp: it is dangerous to operate recursively on '/'\nchgrp: use --no-preserve-root to override this failsafe");
+    }
+}
+
+#[test]
+fn test_preserve_root_symlink() {
+    let file = "test_chgrp_symlink2root";
+    for d in &[
+        "/",
+        "////tmp//../../../../",
+        "..//../../..//../..//../../../../../../../../",
+        ".//../../../../../../..//../../../../../../../",
+    ] {
+        let (at, mut ucmd) = at_and_ucmd!();
+        at.symlink_file(d, file);
+        ucmd.arg("--preserve-root")
+            .arg("-HR")
+            .arg("bin").arg(file)
+            .fails()
+            .stderr_is("chgrp: it is dangerous to operate recursively on '/'\nchgrp: use --no-preserve-root to override this failsafe");
+    }
+
+    let (at, mut ucmd) = at_and_ucmd!();
+    at.symlink_file("///usr", file);
+    ucmd.arg("--preserve-root")
+        .arg("-HR")
+        .arg("bin").arg(format!(".//{}/..//..//../../", file))
+        .fails()
+        .stderr_is("chgrp: it is dangerous to operate recursively on '/'\nchgrp: use --no-preserve-root to override this failsafe");
+
+    let (at, mut ucmd) = at_and_ucmd!();
+    at.symlink_file("/", "/tmp/__root__");
+    ucmd.arg("--preserve-root")
+        .arg("-R")
+        .arg("bin").arg("/tmp/__root__/.")
+        .fails()
+        .stderr_is("chgrp: it is dangerous to operate recursively on '/'\nchgrp: use --no-preserve-root to override this failsafe");
+
+    use std::fs;
+    fs::remove_file("/tmp/__root__").unwrap();
+}
+
+#[test]
+#[cfg(target_os = "linux")]
+fn test_reference() {
+    // skip for root or MS-WSL
+    // * MS-WSL is bugged (as of 2019-12-25), allowing non-root accounts su-level privileges for `chgrp`
+    // * for MS-WSL, succeeds and stdout == 'group of /etc retained as root'
+    if !(get_effective_gid() == 0 || is_wsl()) {
+        new_ucmd!()
+            .arg("-v")
+            .arg("--reference=/etc/passwd")
+            .arg("/etc")
+            .fails()
+            .stderr_is("chgrp: changing group of '/etc': Operation not permitted (os error 1)\n")
+            .stdout_is("failed to change group of /etc from root to root\n");
+    }
+}
+
+#[test]
+#[cfg(target_os = "macos")]
+fn test_reference() {
+    new_ucmd!()
+        .arg("-v")
+        .arg("--reference=/etc/passwd")
+        .arg("/etc")
+        .succeeds();
+}
+
+#[test]
+#[cfg(target_os = "linux")]
+fn test_big_p() {
+    if get_effective_gid() != 0 {
+        new_ucmd!()
+            .arg("-RP")
+            .arg("bin")
+            .arg("/proc/self/cwd")
+            .fails()
+            .stderr_is(
+                "chgrp: changing group of '/proc/self/cwd': Operation not permitted (os error 1)\n",
+            );
+    }
+}
+
+#[test]
+#[cfg(target_os = "linux")]
+fn test_big_h() {
+    if get_effective_gid() != 0 {
+        assert!(
+            new_ucmd!()
+                .arg("-RH")
+                .arg("bin")
+                .arg("/proc/self/fd")
+                .fails()
+                .stderr
+                .lines()
+                .fold(0, |acc, _| acc + 1)
+                > 1
+        );
+    }
+}