Require column name(s) in sort-by (#7041)

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

@@ -0,0 +1,48 @@
+use nu_test_support::{nu, pipeline};
+
+
+#[test]
+fn by_invalid_types() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            open cargo_sample.toml --raw
+            | echo ["foo" 1]
+            | sort
+            | to json -r
+        "#
+    ));
+
+    let json_output = r#"[1,"foo"]"#;
+    assert_eq!(actual.out, json_output);
+}
+
+#[test]
+fn sort_primitive_values() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            open cargo_sample.toml --raw
+            | lines
+            | skip 1
+            | first 6
+            | sort
+            | first
+        "#
+    ));
+
+    assert_eq!(actual.out, "authors = [\"The Nushell Project Developers\"]");
+}
+
+#[test]
+fn sort_different_types() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            [a, 1, b, 2, c, 3, [4, 5, 6], d, 4, [1, 2, 3]] | sort | to json --raw
+        "#
+    ));
+
+    let json_output = r#"[1,2,3,4,"a","b","c","d",[1,2,3],[4,5,6]]"#;
+    assert_eq!(actual.out, json_output);
+}