This commit is the continuing phase of extracting functionality to subcrates. We extract test helpers and begin to change Nu shell's test organization along with it.

tests/commands/mkdir.rs

@@ -0,0 +1,47 @@
+use std::path::Path;
+use test_support::fs::files_exist_at;
+use test_support::nu;
+use test_support::playground::Playground;
+
+#[test]
+fn creates_directory() {
+    Playground::setup("mkdir_test_1", |dirs, _| {
+        nu!(
+            cwd: dirs.test(),
+            "mkdir my_new_directory"
+        );
+
+        let expected = dirs.test().join("my_new_directory");
+
+        assert!(expected.exists());
+    })
+}
+
+#[test]
+fn accepts_and_creates_directories() {
+    Playground::setup("mkdir_test_2", |dirs, _| {
+        nu!(
+            cwd: dirs.test(),
+            "mkdir 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("mkdir_test_3", |dirs, _| {
+        nu!(
+            cwd: dirs.test(),
+            "mkdir some_folder/another/deeper_one"
+        );
+
+        let expected = dirs.test().join("some_folder/another/deeper_one");
+
+        assert!(expected.exists());
+    })
+}