Revert of Reopened: Caching the result of readPixelsSupported

tests/THashCache.cpp

-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "Test.h"
-#include "SkTHashCache.h"
-
-
-// Tests the SkTHashCache<T> class template.
-
-struct Tint {
-    uint32_t value;
-
-    bool operator==(const Tint& rhs) const {
-        return value == rhs.value;
-    }
-};
-
-class Element {
-public:
-
-    bool operator==(const Element& rhs) const {
-        return value == rhs.value && key == rhs.key;
-    }
-
-    static const Tint& GetKey(const Element& element) {
-        return element.key;
-    }
-
-    static uint32_t Hash(const Tint& key) {
-        return key.value;
-    }
-
-    Element(Tint key, int value) : key(key), value(value) {
-    }
-
-    Tint key;
-    int value;
-};
-
-typedef SkTHashCache<Element, Tint> CacheType;
-
-DEF_TEST(THashCache, reporter) {
-    Tint k11 = {11};
-    Element e11(k11, 22);
-
-    e11.value = e11.value;
-    Element e11Collision(k11, 0);
-    //    Element e42(4, 2);
-
-    //Some tests for the class Element
-    REPORTER_ASSERT(reporter, Element::GetKey(e11) == k11);
-    REPORTER_ASSERT(reporter, Element::Hash(k11) == 11);
-
-    CacheType cache;
-
-    // Is the cahce correctly initialized ?
-    REPORTER_ASSERT(reporter, 0 == cache.size());
-    REPORTER_ASSERT(reporter, NULL == cache.find(k11));
-
-    Element& e11_c = cache.add(e11);
-    e11_c.value = e11_c.value;
-
-    // Tests for simple insertion, verifying that the returned element
-    // has the same values as the original one
-    REPORTER_ASSERT(reporter, 1 == cache.size());
-    REPORTER_ASSERT(reporter, NULL != cache.find(k11));
-    REPORTER_ASSERT(reporter, e11_c == e11);
-
-    Element& e11Collision_c = cache.add(e11Collision);
-    // Verifying that, in case of collision, the element alerady in the cache is not removed
-    REPORTER_ASSERT(reporter, e11Collision_c == e11);
-    REPORTER_ASSERT(reporter, 1 == cache.size());
-
-    Tint k42 = {42};
-    Element e42(k42, 2);
-    cache.add(e42);
-    // Can we add more than one element?
-    REPORTER_ASSERT(reporter, NULL != cache.find(k11));
-    REPORTER_ASSERT(reporter, NULL != cache.find(k42));
-    REPORTER_ASSERT(reporter, 2 == cache.size());
-
-    cache.reset();
-    // Does clear do its job?
-    REPORTER_ASSERT(reporter, 0 == cache.size());
-    REPORTER_ASSERT(reporter, NULL == cache.find(k11));
-    REPORTER_ASSERT(reporter, NULL == cache.find(k42));
-}