Implement uuidgen

Implement uuidgen as a wrapper over the `uuid` crate.

tests/by-util/test_uuidgen.rs

@@ -0,0 +1,98 @@
+// This file is part of the uutils util-linux package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+use uuid::Uuid;
+
+use crate::common::util::{TestScenario, UCommand};
+
+fn assert_ver_eq(cmd: &mut UCommand, ver: uuid::Version) {
+    let uuid = Uuid::parse_str(
+        cmd.succeeds()
+            .stdout_str()
+            .strip_suffix('\n')
+            .expect("newline"),
+    )
+    .expect("valid UUID");
+    assert_eq!(uuid.get_variant(), uuid::Variant::RFC4122);
+    assert_eq!(uuid.get_version(), Some(ver));
+}
+
+#[test]
+fn test_random() {
+    assert_ver_eq(&mut new_ucmd!(), uuid::Version::Random);
+    assert_ver_eq(new_ucmd!().arg("-r"), uuid::Version::Random);
+    assert_ver_eq(new_ucmd!().arg("--random"), uuid::Version::Random);
+}
+
+#[test]
+fn test_time() {
+    assert_ver_eq(new_ucmd!().arg("-t"), uuid::Version::Mac);
+    assert_ver_eq(new_ucmd!().arg("--time"), uuid::Version::Mac);
+}
+
+#[test]
+fn test_arg_conflict() {
+    new_ucmd!().args(&["-r", "-t"]).fails().code_is(1);
+    new_ucmd!().args(&["--time", "--random"]).fails().code_is(1);
+}
+
+#[test]
+fn test_md5_sha1() {
+    new_ucmd!()
+        .args(&["--namespace", "@dns", "--name", "example.com", "-m"])
+        .succeeds()
+        .stdout_only("9073926b-929f-31c2-abc9-fad77ae3e8eb\n");
+    new_ucmd!()
+        .args(&["-s", "--namespace", "@dns", "--name", "foobar"])
+        .succeeds()
+        .stdout_only("a050b517-6677-5119-9a77-2d26bbf30507\n");
+    new_ucmd!()
+        .args(&["-s", "--namespace", "@url", "--name", "foobar"])
+        .succeeds()
+        .stdout_only("8304efdd-bd6e-5b7c-a27f-83f3f05c64e0\n");
+    new_ucmd!()
+        .args(&["--sha1", "--namespace", "@oid", "--name", "foobar"])
+        .succeeds()
+        .stdout_only("364c03e1-bcdc-58bb-94ed-43e9a92f5f08\n");
+    new_ucmd!()
+        .args(&["--sha1", "--namespace", "@x500", "--name", "foobar"])
+        .succeeds()
+        .stdout_only("34da942e-f4a3-5169-9c65-267d2b22cf11\n");
+}
+
+#[test]
+fn test_invalid_arg() {
+    new_ucmd!().arg("-Z").fails().code_is(1);
+    new_ucmd!().args(&["-r", "-Z"]).fails().code_is(1);
+}
+
+#[test]
+fn test_name_namespace_on_non_hash() {
+    new_ucmd!()
+        .args(&["--namespace", "@dns", "-r"])
+        .fails()
+        .code_is(1);
+    new_ucmd!()
+        .args(&["--name", "example.com", "-r"])
+        .fails()
+        .code_is(1);
+    new_ucmd!()
+        .args(&["--namespace", "@dns", "--name", "example.com", "-r"])
+        .fails()
+        .code_is(1);
+}
+
+#[test]
+fn test_missing_name_namespace() {
+    new_ucmd!().arg("--sha1").fails().code_is(1);
+    new_ucmd!()
+        .args(&["--sha1", "--namespace", "@dns"])
+        .fails()
+        .code_is(1);
+    new_ucmd!()
+        .args(&["--sha1", "--name", "example.com"])
+        .fails()
+        .code_is(1);
+}

tests/tests.rs

@@ -60,3 +60,7 @@ mod test_fsfreeze;
 #[cfg(feature = "mcookie")]
 #[path = "by-util/test_mcookie.rs"]
 mod test_mcookie;
+
+#[cfg(feature = "uuidgen")]
+#[path = "by-util/test_uuidgen.rs"]
+mod test_uuidgen;