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Side by Side Diff: tests/THashCache.cpp

Issue 395203002: Revert of Reopened: Caching the result of readPixelsSupported (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 6 years, 5 months ago
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1 /*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "Test.h"
9 #include "SkTHashCache.h"
10
11
12 // Tests the SkTHashCache<T> class template.
13
14 struct Tint {
15 uint32_t value;
16
17 bool operator==(const Tint& rhs) const {
18 return value == rhs.value;
19 }
20 };
21
22 class Element {
23 public:
24
25 bool operator==(const Element& rhs) const {
26 return value == rhs.value && key == rhs.key;
27 }
28
29 static const Tint& GetKey(const Element& element) {
30 return element.key;
31 }
32
33 static uint32_t Hash(const Tint& key) {
34 return key.value;
35 }
36
37 Element(Tint key, int value) : key(key), value(value) {
38 }
39
40 Tint key;
41 int value;
42 };
43
44 typedef SkTHashCache<Element, Tint> CacheType;
45
46 DEF_TEST(THashCache, reporter) {
47 Tint k11 = {11};
48 Element e11(k11, 22);
49
50 e11.value = e11.value;
51 Element e11Collision(k11, 0);
52 // Element e42(4, 2);
53
54 //Some tests for the class Element
55 REPORTER_ASSERT(reporter, Element::GetKey(e11) == k11);
56 REPORTER_ASSERT(reporter, Element::Hash(k11) == 11);
57
58 CacheType cache;
59
60 // Is the cahce correctly initialized ?
61 REPORTER_ASSERT(reporter, 0 == cache.size());
62 REPORTER_ASSERT(reporter, NULL == cache.find(k11));
63
64 Element& e11_c = cache.add(e11);
65 e11_c.value = e11_c.value;
66
67 // Tests for simple insertion, verifying that the returned element
68 // has the same values as the original one
69 REPORTER_ASSERT(reporter, 1 == cache.size());
70 REPORTER_ASSERT(reporter, NULL != cache.find(k11));
71 REPORTER_ASSERT(reporter, e11_c == e11);
72
73 Element& e11Collision_c = cache.add(e11Collision);
74 // Verifying that, in case of collision, the element alerady in the cache is not removed
75 REPORTER_ASSERT(reporter, e11Collision_c == e11);
76 REPORTER_ASSERT(reporter, 1 == cache.size());
77
78 Tint k42 = {42};
79 Element e42(k42, 2);
80 cache.add(e42);
81 // Can we add more than one element?
82 REPORTER_ASSERT(reporter, NULL != cache.find(k11));
83 REPORTER_ASSERT(reporter, NULL != cache.find(k42));
84 REPORTER_ASSERT(reporter, 2 == cache.size());
85
86 cache.reset();
87 // Does clear do its job?
88 REPORTER_ASSERT(reporter, 0 == cache.size());
89 REPORTER_ASSERT(reporter, NULL == cache.find(k11));
90 REPORTER_ASSERT(reporter, NULL == cache.find(k42));
91 }
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