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authorMattes D <github@xoft.cz>2017-03-28 16:37:25 +0200
committerGitHub <noreply@github.com>2017-03-28 16:37:25 +0200
commit5dc0189a160a9ab4d6c9c2865fc8ff5d7ca32d69 (patch)
tree9dbb0087fe80f2bff8da8d9eb9847acfd9cc0638 /tests/FastRandom
parentMerge pull request #3641 from cuberite/firework_nbt (diff)
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Diffstat (limited to '')
-rw-r--r--tests/FastRandom/FastRandomTest.cpp62
1 files changed, 55 insertions, 7 deletions
diff --git a/tests/FastRandom/FastRandomTest.cpp b/tests/FastRandom/FastRandomTest.cpp
index e7729382d..9ab775936 100644
--- a/tests/FastRandom/FastRandomTest.cpp
+++ b/tests/FastRandom/FastRandomTest.cpp
@@ -7,6 +7,9 @@
#include "FastRandom.h"
+
+
+
static void TestInts(void)
{
cFastRandom rnd;
@@ -24,14 +27,17 @@ static void TestInts(void)
sum += v;
}
double avg = static_cast<double>(sum) / ITER;
- printf("avg: %f\n", avg);
+ LOG("avg: %f", avg);
for (int i = 0; i < BUCKETS; i++)
{
- printf(" bucket %d: %d\n", i, Counts[i]);
+ LOG(" bucket %d: %d", i, Counts[i]);
}
}
+
+
+
static void TestFloats(void)
{
cFastRandom rnd;
@@ -49,23 +55,65 @@ static void TestFloats(void)
sum += v;
}
sum = sum / ITER;
- printf("avg: %f\n", sum);
+ LOG("avg: %f", sum);
for (int i = 0; i < BUCKETS; i++)
{
- printf(" bucket %d: %d\n", i, Counts[i]);
+ LOG(" bucket %d: %d", i, Counts[i]);
+ }
+}
+
+
+
+
+
+/** Checks whether re-creating the cFastRandom class produces the same initial number over and over (#2935) */
+static void TestReCreation(void)
+{
+ const int ITER = 10000;
+ int lastVal = 0;
+ int numSame = 0;
+ int maxNumSame = 0;
+ for (int i = 0; i < ITER; ++i)
+ {
+ cFastRandom rnd;
+ int val = rnd.NextInt(10);
+ if (val == lastVal)
+ {
+ numSame += 1;
+ }
+ else
+ {
+ if (numSame > maxNumSame)
+ {
+ maxNumSame = numSame;
+ }
+ numSame = 0;
+ lastVal = val;
+ }
}
+ if (numSame > maxNumSame)
+ {
+ maxNumSame = numSame;
+ }
+ LOG("Out of %d creations, there was a chain of at most %d same numbers generated.", ITER, maxNumSame);
}
+
+
+
int main(void)
{
- LOGD("FastRandom Test started");
+ LOG("FastRandom Test started");
- LOGD("Testing ints");
+ LOG("Testing ints");
TestInts();
- LOGD("Testing floats");
+ LOG("Testing floats");
TestFloats();
+ LOG("Testing re-creation");
+ TestReCreation();
+
LOG("FastRandom test finished");
}