t.Fatalf("expect len 16 bytes but got %d. r.w=%d, r.r=%d", rb.Length(), rb.w, rb.r)
	}
	if rb.Free() != 48 {
		t.Fatalf("expect free 48 bytes but got %d. r.w=%d, r.r=%d", rb.Free(), rb.w, rb.r)
	}
	if !bytes.Equal(rb.Bytes(nil), []byte(strings.Repeat("abcd", 4))) {
		t.Fatalf("expect 4 abcd but got %s. r.w=%d, r.r=%d", rb.Bytes(nil), rb.w, rb.r)
	}

	// check empty or full
	if rb.IsEmpty() {

	if cred.Status == AccountOff {
		return false
	}
	return IsAccessKeyValid(cred.AccessKey) && IsSecretKeyValid(cred.SecretKey) && !cred.IsExpired()
}

// Equal - returns whether two credentials are equal or not.
func (cred Credentials) Equal(ccred Credentials) bool {
	if !ccred.IsValid() {
		return false
	}

	// SS parity drives should be greater than or equal to minParityDrives.
	// Parity below minParityDrives is not supported.
	if ssParity > 0 && ssParity < minParityDrives {
		return fmt.Errorf("parity %d should be greater than or equal to %d",
			ssParity, minParityDrives)
	}

	if ssParity > setDriveCount/2 {
		return fmt.Errorf("parity %d should be less than or equal to %d", ssParity, setDriveCount/2)
	}

	return nil

		for i := 0; i < b.N; i++ {
			eq := Equal(buf1, buf2)
			if !eq {
				b.Fatal("bad equal")
			}
		}
	})

	sizes := []int{1, 6, 9, 15, 16, 20, 32, 4 << 10, 4 << 20, 64 << 20}

	b.Run("same", func(b *testing.B) {
		benchBytes(b, sizes, bmEqual(func(a, b []byte) bool { return Equal(a, a) }))
	})

	benchBytes(b, sizes, bmEqual(Equal))
}

        assertTrue(f1.equals(f2), "Expected " + f1 + " to equal " + f2);
        assertTrue(f2.equals(f1), "Expected " + f2 + " to equal " + f1);
        assertTrue(f1.hashCode() == f2.hashCode());

        IncludesArtifactFilter f3 = new IncludesArtifactFilter(Arrays.asList("d", "c", "e"));
        assertTrue(f1.equals(f3), "Expected " + f1 + " to equal " + f3);
        assertTrue(f1.hashCode() == f3.hashCode());

    File i18nFile = getTestFile("i18n.txt");
    assertFalse(Files.equal(asciiFile, i18nFile));
    assertTrue(Files.equal(asciiFile, asciiFile));

    File temp = createTempFile();
    Files.copy(asciiFile, temp);
    assertTrue(Files.equal(asciiFile, temp));

    Files.copy(i18nFile, temp);
    assertTrue(Files.equal(i18nFile, temp));

    Files.copy(asciiFile, temp);

    File i18nFile = getTestFile("i18n.txt");
    assertFalse(Files.equal(asciiFile, i18nFile));
    assertTrue(Files.equal(asciiFile, asciiFile));

    File temp = createTempFile();
    Files.copy(asciiFile, temp);
    assertTrue(Files.equal(asciiFile, temp));

    Files.copy(i18nFile, temp);
    assertTrue(Files.equal(i18nFile, temp));

    Files.copy(asciiFile, temp);

   * required, to have the following properties:
   *
   * <ul>
   *   <li>Its execution does not cause any observable side effects.
   *   <li>The computation is <i>consistent with equals</i>; that is, {@link Objects#equal
   *       Objects.equal}{@code (a, b)} implies that {@code predicate.apply(a) ==
   *       predicate.apply(b))}.
   * </ul>
   *

		out      bool
	}{
		{"error equal", errors.New("1"), errors.New("1"), true},
		{"error not equal", errors.New("1"), errors.New("2"), false},
		{"driver.Valuer equal", ModifyAt{Time: now, Valid: true}, ModifyAt{Time: now, Valid: true}, true},
		{"driver.Valuer not equal", ModifyAt{Time: now, Valid: true}, ModifyAt{Time: now.Add(time.Second), Valid: true}, false},
		{"driver.Valuer equal (ptr to nil ptr)", (*ModifyAt)(nil), &ModifyAt{}, false},

class FileModelSourceTest {

    /**
     * Test of equals method, of class FileModelSource.
     */
    @Test
    void testEquals() throws Exception {
        File tempFile = createTempFile("pomTest");
        FileModelSource instance = new FileModelSource(tempFile);

        assertFalse(instance.equals(null), "Expected " + instance + " to not equal " + null);
        assertFalse(instance.equals(new Object()));