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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkChecksum.h"
#include "SkRefCnt.h"
#include "SkString.h"
#include "SkTHash.h"
#include "Test.h"
// Tests use of const foreach(). map.count() is of course the better way to do this.
static int count(const SkTHashMap<int, double>& map) {
int n = 0;
map.foreach([&n](int, double) { n++; });
return n;
}
DEF_TEST(HashMap, r) {
SkTHashMap<int, double> map;
map.set(3, 4.0);
REPORTER_ASSERT(r, map.count() == 1);
REPORTER_ASSERT(r, map.approxBytesUsed() > 0);
double* found = map.find(3);
REPORTER_ASSERT(r, found);
REPORTER_ASSERT(r, *found == 4.0);
map.foreach([](int key, double* d){ *d = -key; });
REPORTER_ASSERT(r, count(map) == 1);
found = map.find(3);
REPORTER_ASSERT(r, found);
REPORTER_ASSERT(r, *found == -3.0);
REPORTER_ASSERT(r, !map.find(2));
const int N = 20;
for (int i = 0; i < N; i++) {
map.set(i, 2.0*i);
}
for (int i = 0; i < N; i++) {
double* found = map.find(i);
REPORTER_ASSERT(r, found);
REPORTER_ASSERT(r, *found == i*2.0);
}
for (int i = N; i < 2*N; i++) {
REPORTER_ASSERT(r, !map.find(i));
}
REPORTER_ASSERT(r, map.count() == N);
for (int i = 0; i < N/2; i++) {
map.remove(i);
}
for (int i = 0; i < N; i++) {
double* found = map.find(i);
REPORTER_ASSERT(r, (found == nullptr) == (i < N/2));
}
REPORTER_ASSERT(r, map.count() == N/2);
map.reset();
REPORTER_ASSERT(r, map.count() == 0);
{
// Test that we don't leave dangling values in empty slots.
SkTHashMap<int, sk_sp<SkRefCnt>> refMap;
auto ref = sk_make_sp<SkRefCnt>();
REPORTER_ASSERT(r, ref->unique());
refMap.set(0, ref);
REPORTER_ASSERT(r, refMap.count() == 1);
REPORTER_ASSERT(r, !ref->unique());
refMap.remove(0);
REPORTER_ASSERT(r, refMap.count() == 0);
REPORTER_ASSERT(r, ref->unique());
}
}
DEF_TEST(HashSet, r) {
SkTHashSet<SkString> set;
set.add(SkString("Hello"));
set.add(SkString("World"));
REPORTER_ASSERT(r, set.count() == 2);
REPORTER_ASSERT(r, set.contains(SkString("Hello")));
REPORTER_ASSERT(r, set.contains(SkString("World")));
REPORTER_ASSERT(r, !set.contains(SkString("Goodbye")));
REPORTER_ASSERT(r, set.find(SkString("Hello")));
REPORTER_ASSERT(r, *set.find(SkString("Hello")) == SkString("Hello"));
set.remove(SkString("Hello"));
REPORTER_ASSERT(r, !set.contains(SkString("Hello")));
REPORTER_ASSERT(r, set.count() == 1);
set.reset();
REPORTER_ASSERT(r, set.count() == 0);
}
namespace {
class CopyCounter {
public:
CopyCounter() : fID(0), fCounter(nullptr) {}
CopyCounter(uint32_t id, uint32_t* counter) : fID(id), fCounter(counter) {}
CopyCounter(const CopyCounter& other)
: fID(other.fID)
, fCounter(other.fCounter) {
SkASSERT(fCounter);
*fCounter += 1;
}
void operator=(const CopyCounter& other) {
fID = other.fID;
fCounter = other.fCounter;
*fCounter += 1;
}
CopyCounter(CopyCounter&& other) { *this = std::move(other); }
void operator=(CopyCounter&& other) {
fID = other.fID;
fCounter = other.fCounter;
}
bool operator==(const CopyCounter& other) const {
return fID == other.fID;
}
private:
uint32_t fID;
uint32_t* fCounter;
};
struct HashCopyCounter {
uint32_t operator()(const CopyCounter&) const {
return 0; // let them collide, what do we care?
}
};
}
DEF_TEST(HashSetCopyCounter, r) {
SkTHashSet<CopyCounter, HashCopyCounter> set;
uint32_t globalCounter = 0;
CopyCounter copyCounter1(1, &globalCounter);
CopyCounter copyCounter2(2, &globalCounter);
REPORTER_ASSERT(r, globalCounter == 0);
set.add(copyCounter1);
REPORTER_ASSERT(r, globalCounter == 1);
REPORTER_ASSERT(r, set.contains(copyCounter1));
REPORTER_ASSERT(r, globalCounter == 1);
set.add(copyCounter1);
// We allow copies for same-value adds for now.
REPORTER_ASSERT(r, globalCounter == 2);
set.add(copyCounter2);
REPORTER_ASSERT(r, globalCounter == 3);
REPORTER_ASSERT(r, set.contains(copyCounter1));
REPORTER_ASSERT(r, set.contains(copyCounter2));
REPORTER_ASSERT(r, globalCounter == 3);
set.add(copyCounter1);
set.add(copyCounter2);
// We allow copies for same-value adds for now.
REPORTER_ASSERT(r, globalCounter == 5);
}
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