test random ints of various widths

[blank.git] / tst / rand / StabilityTest.cpp

diff --git a/tst/rand/StabilityTest.cpp b/tst/rand/StabilityTest.cpp
index 9ed047d211e931de1cd32adeeb897026e07cf509..579433752bfc779f03512248e02deb15c5bd8062 100644 (file)
--- a/tst/rand/StabilityTest.cpp
+++ b/tst/rand/StabilityTest.cpp
@@ -68,6 +68,7 @@ void StabilityTest::testRNG() {
                "unexpected value #8 from RNG",
                uint16_t(0x0000), value
        );
+       random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #9 from RNG",
                uint16_t(0x0000), value
@@ -80,12 +81,12 @@ void StabilityTest::testRNG() {
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #11 from RNG",
-               uint16_t(0x0000), value
+               uint16_t(0x2E70), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #12 from RNG",
-               uint16_t(0x2E70), value
+               uint16_t(0x0000), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
@@ -100,12 +101,12 @@ void StabilityTest::testRNG() {
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #15 from RNG",
-               uint16_t(0x0000), value
+               uint16_t(0x1011), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #16 from RNG",
-               uint16_t(0x1011), value
+               uint16_t(0x0000), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
@@ -115,17 +116,17 @@ void StabilityTest::testRNG() {
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #18 from RNG",
-               uint16_t(0x0000), value
+               uint16_t(0xB000), value
        );
-       random(value);
+       value = random.Next<uint16_t>();
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
-               "unexpected value #19 from RNG",
-               uint16_t(0xB000), value
+               "unexpected value #19 from RNG (using Next())",
+               uint16_t(0x0B0B), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #20 from RNG",
-               uint16_t(0x0B0B), value
+               uint16_t(0x0000), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
@@ -135,37 +136,37 @@ void StabilityTest::testRNG() {
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #22 from RNG",
-               uint16_t(0x0000), value
+               uint16_t(0x1500), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #23 from RNG",
-               uint16_t(0x1500), value
+               uint16_t(0x0454), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #24 from RNG",
-               uint16_t(0x0454), value
+               uint16_t(0x0000), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #25 from RNG",
                uint16_t(0x0000), value
        );
-       random(value);
+       value = random.Next<uint16_t>();
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
-               "unexpected value #26 from RNG",
-               uint16_t(0x0000), value
+               "unexpected value #26 from RNG (using Next())",
+               uint16_t(0xC970), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #27 from RNG",
-               uint16_t(0xC970), value
+               uint16_t(0x02E5), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #28 from RNG",
-               uint16_t(0x02E5), value
+               uint16_t(0x0000), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
@@ -175,17 +176,57 @@ void StabilityTest::testRNG() {
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #30 from RNG",
-               uint16_t(0x0000), value
+               uint16_t(0x0101), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #31 from RNG",
-               uint16_t(0x0101), value
+               uint16_t(0x0100), value
        );
        random(value);
        CPPUNIT_ASSERT_EQUAL_MESSAGE(
                "unexpected value #32 from RNG",
-               uint16_t(0x0100), value
+               uint16_t(0x0000), value
+       );
+
+       GaloisLFSR random1(1);
+       uint16_t value1;
+       for (int i = 0; i < 32; ++i) {
+               random1(value1);
+       }
+       CPPUNIT_ASSERT_EQUAL_MESSAGE(
+               "RNG with seeds 0 and 1 differ",
+               value, value1
+       );
+
+       GaloisLFSR random_bool(0);
+       bool value_bool;
+       for (int i = 0; i < (16 * 32); ++i) {
+               random_bool(value_bool);
+       }
+       CPPUNIT_ASSERT_EQUAL_MESSAGE(
+               "unexpected result for bool",
+               false, value_bool
+       );
+
+       GaloisLFSR random8(0);
+       uint8_t value8;
+       for (int i = 0; i < 31; ++i) {
+               random8(value8);
+       }
+       CPPUNIT_ASSERT_EQUAL_MESSAGE(
+               "unexpected result for uint8",
+               uint8_t(0x10), value8
+       );
+
+       GaloisLFSR random32(0);
+       uint32_t value32;
+       for (int i = 0; i < 16; ++i) {
+               random32(value32);
+       }
+       CPPUNIT_ASSERT_EQUAL_MESSAGE(
+               "unexpected result for uint32",
+               uint32_t(0xB0000000), value32
        );
 }