Columnpath support when passing fields for formatting. (#1472)

crates/nu-cli/tests/commands/format.rs

@@ -14,3 +14,17 @@ fn creates_the_resulting_string_from_the_given_fields() {
 
     assert_eq!(actual, "nu has license ISC");
 }
+
+#[test]
+fn given_fields_can_be_column_paths() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+        open cargo_sample.toml
+            | format "{package.name} is {package.description}"
+            | echo $it
+        "#
+    ));
+
+    assert_eq!(actual, "nu is a new type of shell");
+}