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instrument unit test to use reproducible random number generator

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-08-01 12:42:08 -07:00
parent 22a2aae486
commit be8add44e9
1 changed files with 19 additions and 11 deletions
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30
src/test/heap.cpp
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@ -17,6 +17,7 @@ Revision History:
--*/
#include<iostream>
#include "util/util.h"
#include "util/heap.h"
#include "util/hashtable.h"
#include "util/trace.h"
@ -27,11 +28,13 @@ struct int_hash_proc { unsigned operator()(int v) const { return v * 17; }};
typedef int_hashtable<int_hash_proc, default_eq<int> > int_set;
#define N 10000
static random_gen heap_rand(1);
static void tst1() {
int_heap h(N);
int_set t;
for (int i = 0; i < N * 3; i++) {
int val = rand() % N;
int val = heap_rand() % N;
if (!h.contains(val)) {
ENSURE(!t.contains(val));
h.insert(val);
@ -64,9 +67,10 @@ typedef heap<lt_proc2> int_heap2;
static void init_values() {
for (unsigned i = 0; i < N; i++)
g_value[i] = rand();
g_value[i] = heap_rand();
}
#if _TRACE
static void dump_heap(const int_heap2 & h, std::ostream & out) {
// int_heap2::const_iterator it = h.begin();
// int_heap2::const_iterator end = h.end();
@ -75,16 +79,16 @@ static void dump_heap(const int_heap2 & h, std::ostream & out) {
// }
// out << "\n";
}
#endif
static void tst2() {
(void)dump_heap;
int_heap2 h(N);
for (int i = 0; i < N * 10; i++) {
if (i % 1000 == 0) std::cout << "i: " << i << std::endl;
int cmd = rand() % 10;
int cmd = heap_rand() % 10;
if (cmd <= 3) {
// insert
int val = rand() % N;
int val = heap_rand() % N;
if (!h.contains(val)) {
TRACE("heap", tout << "inserting: " << val << "\n";);
h.insert(val);
@ -93,7 +97,7 @@ static void tst2() {
}
}
else if (cmd <= 6) {
int val = rand() % N;
int val = heap_rand() % N;
if (h.contains(val)) {
TRACE("heap", tout << "removing: " << val << "\n";);
h.erase(val);
@ -103,9 +107,9 @@ static void tst2() {
}
else if (cmd <= 8) {
// increased & decreased
int val = rand() % N;
int val = heap_rand() % N;
int old_v = g_value[val];
int new_v = rand();
int new_v = heap_rand();
if (h.contains(val)) {
g_value[val] = new_v;
if (old_v < new_v) {
@ -128,8 +132,12 @@ static void tst2() {
void tst_heap() {
// enable_debug("heap");
enable_trace("heap");
tst1();
init_values();
tst2();
unsigned i = 0;
while (i < 3) {
heap_rand.set_seed(i++);
tst1();
init_values();
tst2();
}
}