Andreas Wundsam | 7c15b17 | 2014-04-24 19:02:40 -0700 | [diff] [blame] | 1 | package org.projectfloodlight.openflow.types; |
| 2 | |
| 3 | import static org.hamcrest.CoreMatchers.equalTo; |
| 4 | import static org.hamcrest.CoreMatchers.not; |
| 5 | import static org.junit.Assert.assertEquals; |
| 6 | import static org.junit.Assert.assertFalse; |
| 7 | import static org.junit.Assert.assertNotEquals; |
| 8 | import static org.junit.Assert.assertThat; |
| 9 | import static org.junit.Assert.assertTrue; |
Andreas Wundsam | c5e9870 | 2014-05-05 13:12:19 -0700 | [diff] [blame] | 10 | import static org.junit.Assert.fail; |
Andreas Wundsam | 7c15b17 | 2014-04-24 19:02:40 -0700 | [diff] [blame] | 11 | |
Andreas Wundsam | 972bc42 | 2014-05-05 13:29:50 -0700 | [diff] [blame] | 12 | import org.hamcrest.Matchers; |
Andreas Wundsam | 7c15b17 | 2014-04-24 19:02:40 -0700 | [diff] [blame] | 13 | import org.junit.Test; |
| 14 | |
| 15 | import com.google.common.hash.HashCode; |
| 16 | import com.google.common.hash.Hasher; |
| 17 | import com.google.common.hash.Hashing; |
| 18 | |
| 19 | public class U128Test { |
| 20 | @Test |
| 21 | public void testPositiveRaws() { |
| 22 | assertThat(U128.of(0, 0).getMsb(), equalTo(0L)); |
| 23 | assertThat(U128.of(0, 0).getLsb(), equalTo(0L)); |
| 24 | |
| 25 | assertThat(U128.of(1, 2).getMsb(), equalTo(1L)); |
| 26 | assertThat(U128.of(1, 2).getLsb(), equalTo(2L)); |
| 27 | } |
| 28 | |
| 29 | @Test |
| 30 | public void testPutTo() { |
| 31 | U128 h = U128.of(0x1234_5678_90ab_cdefL,0xdeafbeefdeadbeefL); |
| 32 | U128 hSame = U128.of(0x1234_5678_90ab_cdefL,0xdeafbeefdeadbeefL); |
| 33 | |
| 34 | U128 hBothDiff = U128.of(0x1234_5678_90ab_cdefL,0x1234_5678_90ab_cdefL); |
| 35 | U128 hMsbDiff = U128.of(0x0234_5678_90ab_cdefL,0xdeafbeefdeadbeefL); |
| 36 | U128 hLsbDiff = U128.of(0x1234_5678_90ab_cdefL,0xdeafbeefdeadbeeeL); |
| 37 | |
| 38 | assertThat(hash(h), equalTo(hash(hSame))); |
| 39 | assertThat(hash(h), not(hash(hBothDiff))); |
| 40 | assertThat(hash(h), not(hash(hMsbDiff))); |
| 41 | assertThat(hash(h), not(hash(hLsbDiff))); |
| 42 | } |
| 43 | |
| 44 | private HashCode hash(U128 f) { |
| 45 | Hasher hash = Hashing.murmur3_128().newHasher(); |
| 46 | f.putTo(hash); |
| 47 | return hash.hash(); |
| 48 | |
| 49 | } |
| 50 | |
| 51 | @Test |
| 52 | public void testEqualHashCode() { |
| 53 | U128 h1 = U128.of(0xdeafbeefdeadbeefL, 0xdeafbeefdeadbeefL); |
| 54 | U128 h2 = U128.of(0xdeafbeefdeadbeefL, 0xdeafbeefdeadbeefL); |
| 55 | U128 h3 = U128.of(0xeeafbeefdeadbeefL, 0xdeafbeefdeadbeefL); |
| 56 | U128 h3_2 = U128.of(0xdeafbeefdeadbeefL, 0xeeafbeefdeadbeefL); |
| 57 | |
| 58 | assertTrue(h1.equals(h1)); |
| 59 | assertTrue(h1.equals(h2)); |
| 60 | assertFalse(h1.equals(h3)); |
| 61 | assertFalse(h1.equals(h3_2)); |
| 62 | assertTrue(h2.equals(h1)); |
| 63 | |
| 64 | assertEquals(h1.hashCode(), h2.hashCode()); |
| 65 | assertNotEquals(h1.hashCode(), h3.hashCode()); // not technically a requirement, but we'll hopefully be lucky. |
| 66 | assertNotEquals(h1.hashCode(), h3_2.hashCode()); // not technically a requirement, but we'll hopefully be lucky. |
| 67 | } |
| 68 | |
| 69 | @Test |
| 70 | public void testXor() { |
| 71 | U128 hNull = U128.of(0, 0); |
| 72 | U128 hDeadBeef = U128.of(0xdeafbeefdeadbeefL, 0xdeafbeefdeadbeefL); |
| 73 | assertThat(hNull.xor(hNull), equalTo(hNull)); |
| 74 | assertThat(hNull.xor(hDeadBeef), equalTo(hDeadBeef)); |
| 75 | assertThat(hDeadBeef.xor(hNull), equalTo(hDeadBeef)); |
| 76 | assertThat(hDeadBeef.xor(hDeadBeef), equalTo(hNull)); |
| 77 | |
| 78 | |
| 79 | U128 h1_0 = U128.of(1L, 0); |
| 80 | U128 h8_0 = U128.of(0x8000000000000000L, 0); |
| 81 | U128 h81_0 = U128.of(0x8000000000000001L, 0); |
| 82 | assertThat(h1_0.xor(h8_0), equalTo(h81_0)); |
| 83 | |
| 84 | U128 h0_1 = U128.of(0, 1L); |
| 85 | U128 h0_8 = U128.of(0, 0x8000000000000000L); |
| 86 | U128 h0_81 = U128.of(0, 0x8000000000000001L); |
| 87 | assertThat(h0_1.xor(h0_8), equalTo(h0_81)); |
| 88 | } |
| 89 | |
| 90 | @Test |
Andreas Wundsam | c5e9870 | 2014-05-05 13:12:19 -0700 | [diff] [blame] | 91 | public void testKeyBits() { |
| 92 | U128 zeroU = U128.of(0,0); |
| 93 | assertThat(zeroU.prefixBits(0), equalTo(0)); |
| 94 | assertThat(zeroU.prefixBits(16), equalTo(0)); |
| 95 | assertThat(zeroU.prefixBits(32), equalTo(0)); |
| 96 | |
| 97 | checkInvalidKeyBitSize(zeroU, 33); |
| 98 | checkInvalidKeyBitSize(zeroU, 64); |
| 99 | assertThat(zeroU.prefixBits(3), equalTo(0)); |
| 100 | |
| 101 | U128 positiveU = U128.of(0x1234_5678_1234_5678L, 0x1234_5678_1234_5678L); |
| 102 | assertThat(positiveU.prefixBits(0), equalTo(0)); |
| 103 | assertThat(positiveU.prefixBits(16), equalTo(0x1234)); |
| 104 | assertThat(positiveU.prefixBits(32), equalTo(0x12345678)); |
| 105 | checkInvalidKeyBitSize(positiveU, 33); |
| 106 | checkInvalidKeyBitSize(positiveU, 64); |
| 107 | |
| 108 | U128 signedBitU = U128.of(0x8765_4321_8765_4321L, 0x1234_5678_1234_5678L); |
| 109 | assertThat(signedBitU.prefixBits(0), equalTo(0)); |
| 110 | assertThat(signedBitU.prefixBits(16), equalTo(0x8765)); |
| 111 | assertThat(signedBitU.prefixBits(32), equalTo(0x8765_4321)); |
| 112 | checkInvalidKeyBitSize(signedBitU, 33); |
| 113 | checkInvalidKeyBitSize(signedBitU, 64); |
| 114 | } |
| 115 | |
| 116 | private void |
| 117 | checkInvalidKeyBitSize(U128 u, int prefixBit) { |
| 118 | try { |
| 119 | u.prefixBits(prefixBit); |
| 120 | fail("Expected exception not thrown for "+prefixBit + " bits"); |
| 121 | } catch(IllegalArgumentException e) { |
| 122 | // expected |
| 123 | } |
| 124 | } |
| 125 | |
Andreas Wundsam | 972bc42 | 2014-05-05 13:29:50 -0700 | [diff] [blame] | 126 | |
| 127 | @Test |
| 128 | public void testCompare() { |
| 129 | U128 u0_0 = U128.of(0, 0); |
| 130 | U128 u0_1 = U128.of(0, 1); |
| 131 | U128 u0_8 = U128.of(0, 0x8765_4321_8765_4321L); |
| 132 | U128 u1_0 = U128.of(0x1234_5678_1234_5678L, 0); |
| 133 | U128 u8_0 = U128.of(0x8765_4321_8765_4321L, 0); |
| 134 | U128 uf_0 = U128.of(0xFFFF_FFFF_FFFF_FFFFL, 0); |
| 135 | |
| 136 | U128[] us = new U128[] { u0_0, u0_1, u0_8, u1_0, u8_0, uf_0 }; |
| 137 | |
| 138 | for(int i = 0; i< us.length; i++) { |
| 139 | U128 u_base = us[i]; |
| 140 | assertThat( |
| 141 | String.format("%s should be equal to itself (compareTo)", u_base), |
| 142 | u_base.compareTo(u_base), equalTo(0)); |
| 143 | assertThat( |
| 144 | String.format("%s should be equal to itself (equals)", u_base), |
| 145 | u_base.equals(u_base), equalTo(true)); |
| 146 | assertThat( |
| 147 | String.format("%s should be equal to itself (equals, by value)", u_base), |
| 148 | u_base.equals(U128.of(u_base.getMsb(), u_base.getLsb())), equalTo(true)); |
| 149 | |
| 150 | for(int j = i+1; j< us.length; j++) { |
| 151 | U128 u_greater = us[j]; |
| 152 | assertThat( |
| 153 | String.format("%s should not be equal to %s", u_base, u_greater), |
| 154 | u_base.equals(u_base), equalTo(true)); |
| 155 | assertThat( |
| 156 | String.format("%s should be smaller than %s", u_base, u_greater), |
| 157 | u_base.compareTo(u_greater), Matchers.lessThan(0)); |
| 158 | assertThat( |
| 159 | String.format("%s should be greater than %s", u_greater, u_base), |
| 160 | u_greater.compareTo(u_base), Matchers.greaterThan(0)); |
| 161 | } |
| 162 | } |
| 163 | } |
| 164 | |
Andreas Wundsam | c5e9870 | 2014-05-05 13:12:19 -0700 | [diff] [blame] | 165 | @Test |
Andreas Wundsam | 7c15b17 | 2014-04-24 19:02:40 -0700 | [diff] [blame] | 166 | public void testCombine() { |
| 167 | long key = 0x1234567890abcdefL; |
| 168 | long val = 0xdeafbeefdeadbeefL; |
| 169 | U128 hkey = U128.of(key, key*2); |
| 170 | U128 hVal = U128.of(val, val/2); |
| 171 | |
| 172 | assertThat(hkey.combineWithValue(hVal, 0), equalTo(hkey.xor(hVal))); |
| 173 | assertThat(hkey.combineWithValue(hVal, 64), equalTo(U128.of(hkey.getMsb(), hkey.getLsb() ^ hVal.getLsb()))); |
| 174 | assertThat(hkey.combineWithValue(hVal, 128), equalTo(hkey)); |
| 175 | |
| 176 | long mask8 = 0xFF00_0000_0000_0000L; |
| 177 | |
| 178 | assertThat(hkey.combineWithValue(hVal, 8), equalTo(U128.of(hkey.getMsb() & mask8 | hkey.getMsb() ^ hVal.getMsb() & ~mask8, |
| 179 | hkey.getLsb() ^ hVal.getLsb() ))); |
| 180 | } |
| 181 | |
| 182 | } |