package daemon

import (
	"reflect"
	"testing"
)

func TestPatternsFromEnv_DefaultsWhenUnset(t *testing.T) {
	t.Setenv("MULTICA_GC_ARTIFACT_PATTERNS", "")
	defaults := []string{"node_modules", ".next", ".turbo"}
	got := patternsFromEnv("MULTICA_GC_ARTIFACT_PATTERNS", defaults)
	if !reflect.DeepEqual(got, defaults) {
		t.Fatalf("expected defaults %v, got %v", defaults, got)
	}
	// Ensure callers get a copy, not a shared backing array.
	got[0] = "mutated"
	if defaults[0] == "mutated" {
		t.Fatal("patternsFromEnv must not return a slice aliased with defaults")
	}
}

func TestPatternsFromEnv_DropsSeparatorBearingEntries(t *testing.T) {
	t.Setenv("MULTICA_GC_ARTIFACT_PATTERNS", "node_modules, .next ,foo/bar, ../etc, ,target")
	got := patternsFromEnv("MULTICA_GC_ARTIFACT_PATTERNS", nil)
	want := []string{"node_modules", ".next", "target"}
	if !reflect.DeepEqual(got, want) {
		t.Fatalf("expected %v, got %v", want, got)
	}
}