package rtcp

import (
	"testing"
)

// TestTimestamp checks that Timestamp correctly returns the most signicicant
// word, and least signiciant word, of a receiver report timestamp.
func TestTimestamp(t *testing.T) {
	const expectedMSW = 2209003992
	const expectedLSW = 1956821460
	report := []byte{
		0x80, 0xc8, 0x00, 0x06,
		0x6f, 0xad, 0x40, 0xc6,
		0x83, 0xaa, 0xb9, 0xd8, // Most significant word of timestamp (2209003992)
		0x74, 0xa2, 0xb9, 0xd4, // Least significant word of timestamp (1956821460)
		0x4b, 0x1c, 0x5a, 0xa5,
		0x00, 0x00, 0x00, 0x66,
		0x00, 0x01, 0xc2, 0xc5,
	}

	msw, lsw, err := Timestamp(report)
	if err != nil {
		t.Fatalf("did not expect error: %v", err)
	}

	if msw != expectedMSW {
		t.Errorf("most significant word of timestamp is not what's expected. \nGot: %v\n Want: %v\n", msw, expectedMSW)
	}

	if lsw != expectedLSW {
		t.Errorf("least significant word of timestamp is not what's expected. \nGot: %v\n Want: %v\n", lsw, expectedLSW)
	}
}