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// Copyright (c) 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <vector>
#include "gmock/gmock.h"
#include "source/util/bit_vector.h"
namespace spvtools {
namespace utils {
namespace {
using BitVectorTest = ::testing::Test;
TEST(BitVectorTest, Initialize) {
BitVector bvec;
// Checks that all values are 0. Also tests checking a bit past the end of
// the vector containing the bits.
for (int i = 1; i < 10000; i *= 2) {
EXPECT_FALSE(bvec.Get(i));
}
}
TEST(BitVectorTest, Set) {
BitVector bvec;
// Since 10,000 is larger than the initial size, this tests the resizing
// code.
for (int i = 3; i < 10000; i *= 2) {
bvec.Set(i);
}
// Check that bits that were not set are 0.
for (int i = 1; i < 10000; i *= 2) {
EXPECT_FALSE(bvec.Get(i));
}
// Check that bits that were set are 1.
for (int i = 3; i < 10000; i *= 2) {
EXPECT_TRUE(bvec.Get(i));
}
}
TEST(BitVectorTest, SetReturnValue) {
BitVector bvec;
// Make sure |Set| returns false when the bit was not set.
for (int i = 3; i < 10000; i *= 2) {
EXPECT_FALSE(bvec.Set(i));
}
// Make sure |Set| returns true when the bit was already set.
for (int i = 3; i < 10000; i *= 2) {
EXPECT_TRUE(bvec.Set(i));
}
}
TEST(BitVectorTest, Clear) {
BitVector bvec;
for (int i = 3; i < 10000; i *= 2) {
bvec.Set(i);
}
// Check that the bits were properly set.
for (int i = 3; i < 10000; i *= 2) {
EXPECT_TRUE(bvec.Get(i));
}
// Clear all of the bits except for bit 3.
for (int i = 6; i < 10000; i *= 2) {
bvec.Clear(i);
}
// Make sure bit 3 was not cleared.
EXPECT_TRUE(bvec.Get(3));
// Make sure all of the other bits that were set have been cleared.
for (int i = 6; i < 10000; i *= 2) {
EXPECT_FALSE(bvec.Get(i));
}
}
TEST(BitVectorTest, ClearReturnValue) {
BitVector bvec;
for (int i = 3; i < 10000; i *= 2) {
bvec.Set(i);
}
// Make sure |Clear| returns true if the bit was set.
for (int i = 3; i < 10000; i *= 2) {
EXPECT_TRUE(bvec.Clear(i));
}
// Make sure |Clear| returns false if the bit was not set.
for (int i = 3; i < 10000; i *= 2) {
EXPECT_FALSE(bvec.Clear(i));
}
}
TEST(BitVectorTest, SimpleOrTest) {
BitVector bvec1;
bvec1.Set(3);
bvec1.Set(4);
BitVector bvec2;
bvec2.Set(2);
bvec2.Set(4);
// Check that |bvec1| changed when doing the |Or| operation.
EXPECT_TRUE(bvec1.Or(bvec2));
// Check that the values are all correct.
EXPECT_FALSE(bvec1.Get(0));
EXPECT_FALSE(bvec1.Get(1));
EXPECT_TRUE(bvec1.Get(2));
EXPECT_TRUE(bvec1.Get(3));
EXPECT_TRUE(bvec1.Get(4));
}
TEST(BitVectorTest, ResizingOrTest) {
BitVector bvec1;
bvec1.Set(3);
bvec1.Set(4);
BitVector bvec2;
bvec2.Set(10000);
// Similar to above except with a large value to test resizing.
EXPECT_TRUE(bvec1.Or(bvec2));
EXPECT_FALSE(bvec1.Get(0));
EXPECT_FALSE(bvec1.Get(1));
EXPECT_FALSE(bvec1.Get(2));
EXPECT_TRUE(bvec1.Get(3));
EXPECT_TRUE(bvec1.Get(10000));
}
TEST(BitVectorTest, SubsetOrTest) {
BitVector bvec1;
bvec1.Set(3);
bvec1.Set(4);
BitVector bvec2;
bvec2.Set(3);
// |Or| returns false if |bvec1| does not change.
EXPECT_FALSE(bvec1.Or(bvec2));
}
} // namespace
} // namespace utils
} // namespace spvtools
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