skia2/tests/DescriptorTest.cpp

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/*
* Copyright 2019 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "src/core/SkDescriptor.h"
#include "tests/Test.h"
class SkDescriptorTestHelper {
public:
static void SetLength(SkDescriptor* desc, size_t length) { desc->fLength = length; }
};
DEF_TEST(Descriptor_empty, r) {
const size_t size = sizeof(SkDescriptor);
auto desc = SkDescriptor::Alloc(size);
desc->init();
REPORTER_ASSERT(r, desc->isValid());
REPORTER_ASSERT(r, desc->getLength() == size);
}
DEF_TEST(Descriptor_valid_simple, r) {
const size_t size =
sizeof(SkDescriptor) + sizeof(SkDescriptor::Entry) + sizeof(SkScalerContextRec);
auto desc = SkDescriptor::Alloc(size);
desc->init();
SkScalerContextRec rec;
desc->addEntry(kRec_SkDescriptorTag, sizeof(rec), &rec);
REPORTER_ASSERT(r, desc->isValid());
REPORTER_ASSERT(r, desc->getLength() == size);
SkDescriptorTestHelper::SetLength(desc.get(), size - 4);
REPORTER_ASSERT(r, !desc->isValid());
}
DEF_TEST(Descriptor_valid_simple_extra_space, r) {
const size_t extra_space = 100;
const size_t size =
sizeof(SkDescriptor) + sizeof(SkDescriptor::Entry) + sizeof(SkScalerContextRec);
auto desc = SkDescriptor::Alloc(size + extra_space);
desc->init();
SkScalerContextRec rec;
desc->addEntry(kRec_SkDescriptorTag, sizeof(rec), &rec);
REPORTER_ASSERT(r, desc->isValid());
REPORTER_ASSERT(r, desc->getLength() == size);
SkDescriptorTestHelper::SetLength(desc.get(), size - 4);
REPORTER_ASSERT(r, !desc->isValid());
}
DEF_TEST(Descriptor_valid_more_tags, r) {
const size_t effectSize = 16;
const size_t testSize = 32;
const size_t size = sizeof(SkDescriptor) + 3 * sizeof(SkDescriptor::Entry) +
sizeof(SkScalerContextRec) + effectSize + testSize;
auto desc = SkDescriptor::Alloc(size);
desc->init();
SkScalerContextRec rec;
desc->addEntry(kRec_SkDescriptorTag, sizeof(rec), &rec);
desc->addEntry(kEffects_SkDescriptorTag, effectSize, nullptr);
desc->addEntry(SkSetFourByteTag('t', 'e', 's', 't'), testSize, nullptr);
REPORTER_ASSERT(r, desc->isValid());
REPORTER_ASSERT(r, desc->getLength() == size);
SkDescriptorTestHelper::SetLength(desc.get(), size - 4);
REPORTER_ASSERT(r, !desc->isValid());
}
DEF_TEST(Descriptor_invalid_rec_size, r) {
const size_t size =
sizeof(SkDescriptor) + sizeof(SkDescriptor::Entry) + sizeof(SkScalerContextRec) - 4;
auto desc = SkDescriptor::Alloc(size);
desc->init();
SkScalerContextRec rec;
desc->addEntry(kRec_SkDescriptorTag, sizeof(rec) - 4, &rec);
REPORTER_ASSERT(r, desc->getLength() == size);
REPORTER_ASSERT(r, !desc->isValid());
}
DEF_TEST(Descriptor_invalid_length, r) {
const size_t size = sizeof(SkDescriptor) + sizeof(SkDescriptor::Entry);
const size_t effect_size = 1000;
auto desc = SkDescriptor::Alloc(size);
desc->init();
SkScalerContextRec rec;
desc->addEntry(kEffects_SkDescriptorTag, effect_size, nullptr);
SkDescriptorTestHelper::SetLength(desc.get(), size);
REPORTER_ASSERT(r, !desc->isValid());
SkDescriptorTestHelper::SetLength(desc.get(), size + effect_size);
REPORTER_ASSERT(r, desc->isValid());
}