package canonical

import "testing"

func TestMarshalSortsKeys(t *testing.T) {
	got, err := Marshal(map[string]any{"b": 1, "a": 2})
	if err != nil {
		t.Fatal(err)
	}
	// Both keys must be present and sorted by name
	want := `{"a":2,"b":1}`
	if string(got) != want {
		t.Errorf("got %q want %q", string(got), want)
	}
}

func TestMarshalStableAcrossRuns(t *testing.T) {
	input := map[string]any{
		"outer": map[string]any{"z": 1, "a": 2, "m": 3},
		"arr":   []any{"3", "1", "2"},
	}
	a, _ := Marshal(input)
	b, _ := Marshal(input)
	if string(a) != string(b) {
		t.Errorf("not stable:\n%s\nvs\n%s", a, b)
	}
}

func TestHashReturnsPrefix(t *testing.T) {
	hash, raw, err := Hash(map[string]any{"k": "v"})
	if err != nil {
		t.Fatal(err)
	}
	if hash[:7] != "sha256:" {
		t.Errorf("hash missing sha256: prefix: %q", hash)
	}
	if string(raw) != `{"k":"v"}` {
		t.Errorf("canonical form: %q", raw)
	}
}