test: nu-highlight for aliased externals

Author: blindFS

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

@@ -11,3 +11,23 @@ fn nu_highlight_where_row_condition() {
     let actual = nu!("'ls | where a b 12345(' | nu-highlight | ansi strip");
     assert_eq!(actual.out, "ls | where a b 12345(");
 }
+
+#[test]
+fn nu_highlight_aliased_external_resolved() {
+    let actual = nu!(r#"$env.config.highlight_resolved_externals = true
+        $env.config.color_config.shape_external_resolved = '#ffffff'
+        alias fff = ^sleep
+        ('fff' | nu-highlight | split row (ansi reset) | get 0) has (ansi $env.config.color_config.shape_external_resolved)"#);
+
+    assert_eq!(actual.out, "true");
+}
+
+#[test]
+fn nu_highlight_aliased_external_unresolved() {
+    let actual = nu!(r#"$env.config.highlight_resolved_externals = true
+        $env.config.color_config.shape_external = '#ffffff'
+        alias fff = ^nonexist
+        ('fff' | nu-highlight | split row (ansi reset) | get 0) has (ansi $env.config.color_config.shape_external)"#);
+
+    assert_eq!(actual.out, "true");
+}