Add umkdir command (#10785)

A `mkdir` command, which uses `uu_mkdir` as backend.

close #10515.

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

@@ -105,6 +105,7 @@ mod touch;
 mod transpose;
 mod try_;
 mod ucp;
+mod umkdir;
 mod uniq;
 mod uniq_by;
 mod update;

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

@@ -0,0 +1,124 @@
+use nu_test_support::fs::files_exist_at;
+use nu_test_support::playground::Playground;
+use nu_test_support::{nu, pipeline};
+use std::path::Path;
+
+#[test]
+fn creates_directory() {
+    Playground::setup("umkdir_test_1", |dirs, _| {
+        nu!(
+            cwd: dirs.test(),
+            "umkdir my_new_directory"
+        );
+
+        let expected = dirs.test().join("my_new_directory");
+
+        assert!(expected.exists());
+    })
+}
+
+#[test]
+fn accepts_and_creates_directories() {
+    Playground::setup("umkdir_test_2", |dirs, _| {
+        nu!(
+            cwd: dirs.test(),
+            "umkdir dir_1 dir_2 dir_3"
+        );
+
+        assert!(files_exist_at(
+            vec![Path::new("dir_1"), Path::new("dir_2"), Path::new("dir_3")],
+            dirs.test()
+        ));
+    })
+}
+
+#[test]
+fn creates_intermediary_directories() {
+    Playground::setup("umkdir_test_3", |dirs, _| {
+        nu!(
+            cwd: dirs.test(),
+            "umkdir some_folder/another/deeper_one"
+        );
+
+        let expected = dirs.test().join("some_folder/another/deeper_one");
+
+        assert!(expected.exists());
+    })
+}
+
+#[test]
+fn create_directory_two_parents_up_using_multiple_dots() {
+    Playground::setup("umkdir_test_4", |dirs, sandbox| {
+        sandbox.within("foo").mkdir("bar");
+
+        nu!(
+            cwd: dirs.test().join("foo/bar"),
+            "umkdir .../boo"
+        );
+
+        let expected = dirs.test().join("boo");
+
+        assert!(expected.exists());
+    })
+}
+
+#[test]
+fn print_created_paths() {
+    Playground::setup("umkdir_test_2", |dirs, _| {
+        let actual = nu!(
+            cwd: dirs.test(),
+            pipeline("umkdir -v dir_1 dir_2 dir_3")
+        );
+
+        assert!(files_exist_at(
+            vec![Path::new("dir_1"), Path::new("dir_2"), Path::new("dir_3")],
+            dirs.test()
+        ));
+
+        assert!(actual.out.contains("dir_1"));
+        assert!(actual.out.contains("dir_2"));
+        assert!(actual.out.contains("dir_3"));
+    })
+}
+
+#[test]
+fn creates_directory_three_dots() {
+    Playground::setup("umkdir_test_1", |dirs, _| {
+        nu!(
+            cwd: dirs.test(),
+            "umkdir test..."
+        );
+
+        let expected = dirs.test().join("test...");
+
+        assert!(expected.exists());
+    })
+}
+
+#[test]
+fn creates_directory_four_dots() {
+    Playground::setup("umkdir_test_1", |dirs, _| {
+        nu!(
+            cwd: dirs.test(),
+            "umkdir test...."
+        );
+
+        let expected = dirs.test().join("test....");
+
+        assert!(expected.exists());
+    })
+}
+
+#[test]
+fn creates_directory_three_dots_quotation_marks() {
+    Playground::setup("umkdir_test_1", |dirs, _| {
+        nu!(
+            cwd: dirs.test(),
+            "umkdir 'test...'"
+        );
+
+        let expected = dirs.test().join("test...");
+
+        assert!(expected.exists());
+    })
+}