ddf94cf108
Skia code prefers static over unnamed namespace. BUG=None TEST=None R=bsalomon@google.com, robertphillips@google.com Author: tfarina@chromium.org Review URL: https://codereview.chromium.org/26962002 git-svn-id: http://skia.googlecode.com/svn/trunk@11747 2bbb7eff-a529-9590-31e7-b0007b416f81
151 lines
3.7 KiB
C++
151 lines
3.7 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Test.h"
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#include "SkTDynamicHash.h"
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namespace {
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struct Entry {
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int key;
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double value;
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};
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const int& GetKey(const Entry& entry) { return entry.key; }
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uint32_t GetHash(const int& key) { return key; }
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bool AreEqual(const Entry& entry, const int& key) { return entry.key == key; }
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class Hash : public SkTDynamicHash<Entry, int, GetKey, GetHash, AreEqual> {
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public:
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Hash() : INHERITED() {}
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Hash(int capacity) : INHERITED(capacity) {}
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// Promote protected methods to public for this test.
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int capacity() const { return this->INHERITED::capacity(); }
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int countCollisions(const int& key) const { return this->INHERITED::countCollisions(key); }
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private:
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typedef SkTDynamicHash<Entry, int, GetKey, GetHash, AreEqual> INHERITED;
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};
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} // namespace
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#define ASSERT(x) REPORTER_ASSERT(reporter, x)
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static void test_growth(skiatest::Reporter* reporter) {
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Entry a = { 1, 2.0 };
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Entry b = { 2, 3.0 };
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Entry c = { 3, 4.0 };
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Entry d = { 4, 5.0 };
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Entry e = { 5, 6.0 };
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Hash hash(4);
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ASSERT(hash.capacity() == 4);
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hash.add(&a);
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ASSERT(hash.capacity() == 4);
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hash.add(&b);
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ASSERT(hash.capacity() == 4);
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hash.add(&c);
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ASSERT(hash.capacity() == 4);
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hash.add(&d);
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ASSERT(hash.capacity() == 8);
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hash.add(&e);
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ASSERT(hash.capacity() == 8);
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ASSERT(hash.count() == 5);
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}
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static void test_add(skiatest::Reporter* reporter) {
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Hash hash;
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Entry a = { 1, 2.0 };
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Entry b = { 2, 3.0 };
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ASSERT(hash.count() == 0);
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hash.add(&a);
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ASSERT(hash.count() == 1);
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hash.add(&b);
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ASSERT(hash.count() == 2);
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}
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static void test_lookup(skiatest::Reporter* reporter) {
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Hash hash(4);
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ASSERT(hash.capacity() == 4);
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// These collide.
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Entry a = { 1, 2.0 };
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Entry b = { 5, 3.0 };
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// Before we insert anything, nothing can collide.
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ASSERT(hash.countCollisions(1) == 0);
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ASSERT(hash.countCollisions(5) == 0);
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ASSERT(hash.countCollisions(9) == 0);
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// First is easy.
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hash.add(&a);
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ASSERT(hash.countCollisions(1) == 0);
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ASSERT(hash.countCollisions(5) == 1);
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ASSERT(hash.countCollisions(9) == 1);
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// Second is one step away.
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hash.add(&b);
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ASSERT(hash.countCollisions(1) == 0);
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ASSERT(hash.countCollisions(5) == 1);
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ASSERT(hash.countCollisions(9) == 2);
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// We can find our data right?
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ASSERT(hash.find(1) != NULL);
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ASSERT(hash.find(1)->value == 2.0);
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ASSERT(hash.find(5) != NULL);
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ASSERT(hash.find(5)->value == 3.0);
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// These aren't in the hash.
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ASSERT(hash.find(2) == NULL);
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ASSERT(hash.find(9) == NULL);
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}
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static void test_remove(skiatest::Reporter* reporter) {
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Hash hash(4);
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ASSERT(hash.capacity() == 4);
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// These collide.
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Entry a = { 1, 2.0 };
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Entry b = { 5, 3.0 };
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Entry c = { 9, 4.0 };
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hash.add(&a);
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hash.add(&b);
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hash.remove(1);
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// a should be marked deleted, and b should still be findable.
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ASSERT(hash.find(1) == NULL);
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ASSERT(hash.find(5) != NULL);
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ASSERT(hash.find(5)->value == 3.0);
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// This will go in the same slot as 'a' did before.
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ASSERT(hash.countCollisions(9) == 0);
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hash.add(&c);
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ASSERT(hash.find(9) != NULL);
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ASSERT(hash.find(9)->value == 4.0);
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ASSERT(hash.find(5) != NULL);
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ASSERT(hash.find(5)->value == 3.0);
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}
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static void test_dynamic_hash(skiatest::Reporter* reporter) {
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test_growth(reporter);
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test_add(reporter);
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test_lookup(reporter);
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test_remove(reporter);
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}
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#include "TestClassDef.h"
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DEFINE_TESTCLASS("DynamicHash", DynamicHashTestClass, test_dynamic_hash);
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