// Copyright (c) 2018 Google LLC
//
// 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.

#ifndef TEST_REDUCE_REDUCE_TEST_UTIL_H_
#define TEST_REDUCE_REDUCE_TEST_UTIL_H_

#include "gtest/gtest.h"

#include "source/opt/ir_context.h"
#include "source/reduce/reduction_opportunity.h"
#include "spirv-tools/libspirv.h"

namespace spvtools {
namespace reduce {

// A helper class that subclasses a given reduction pass class in order to
// provide a wrapper for its protected methods.
template <class ReductionPassT>
class TestSubclass : public ReductionPassT {
 public:
  // Creates an instance of the reduction pass subclass with respect to target
  // environment |env|.
  explicit TestSubclass(const spv_target_env env) : ReductionPassT(env) {}
  ~TestSubclass() = default;

  // A wrapper for GetAvailableOpportunities(...)
  std::vector<std::unique_ptr<ReductionOpportunity>>
  WrapGetAvailableOpportunities(opt::IRContext* context) const {
    return ReductionPassT::GetAvailableOpportunities(context);
  }
};

// Checks whether the given binaries are bit-wise equal.
void CheckEqual(spv_target_env env,
                const std::vector<uint32_t>& expected_binary,
                const std::vector<uint32_t>& actual_binary);

// Assembles the given text and check whether the resulting binary is bit-wise
// equal to the given binary.
void CheckEqual(spv_target_env env, const std::string& expected_text,
                const std::vector<uint32_t>& actual_binary);

// Assembles the given text and turns the given IR into binary, then checks
// whether the resulting binaries are bit-wise equal.
void CheckEqual(spv_target_env env, const std::string& expected_text,
                const opt::IRContext* actual_ir);

// Assembles the given IR context and checks whether the resulting binary is
// valid.
void CheckValid(spv_target_env env, const opt::IRContext* ir);

// Assembles the given IR context, then returns its disassembly as a string.
// Useful for debugging.
std::string ToString(spv_target_env env, const opt::IRContext* ir);

// Assembly options for writing reduction tests.  It simplifies matters if
// numeric ids do not change.
const uint32_t kReduceAssembleOption =
    SPV_TEXT_TO_BINARY_OPTION_PRESERVE_NUMERIC_IDS;
// Disassembly options for writing reduction tests.
const uint32_t kReduceDisassembleOption =
    SPV_BINARY_TO_TEXT_OPTION_NO_HEADER | SPV_BINARY_TO_TEXT_OPTION_INDENT;

// Don't print reducer info during testing.
void NopDiagnostic(spv_message_level_t /*level*/, const char* /*source*/,
                   const spv_position_t& /*position*/, const char* /*message*/);

}  // namespace reduce
}  // namespace spvtools

#endif  // TEST_REDUCE_REDUCE_TEST_UTIL_H_