// Copyright 2020 The Tint Authors.
//
// 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 "gtest/gtest-spi.h"
#include "src/ast/test_helper.h"

namespace tint {
namespace ast {
namespace {

using BinaryExpressionTest = TestHelper;

TEST_F(BinaryExpressionTest, Creation) {
  auto* lhs = Expr("lhs");
  auto* rhs = Expr("rhs");

  auto* r = create<BinaryExpression>(BinaryOp::kEqual, lhs, rhs);
  EXPECT_EQ(r->lhs(), lhs);
  EXPECT_EQ(r->rhs(), rhs);
  EXPECT_EQ(r->op(), BinaryOp::kEqual);
}

TEST_F(BinaryExpressionTest, Creation_WithSource) {
  auto* lhs = Expr("lhs");
  auto* rhs = Expr("rhs");

  auto* r = create<BinaryExpression>(Source{Source::Location{20, 2}},
                                     BinaryOp::kEqual, lhs, rhs);
  auto src = r->source();
  EXPECT_EQ(src.range.begin.line, 20u);
  EXPECT_EQ(src.range.begin.column, 2u);
}

TEST_F(BinaryExpressionTest, IsBinary) {
  auto* lhs = Expr("lhs");
  auto* rhs = Expr("rhs");

  auto* r = create<BinaryExpression>(BinaryOp::kEqual, lhs, rhs);
  EXPECT_TRUE(r->Is<BinaryExpression>());
}

TEST_F(BinaryExpressionTest, Assert_Null_LHS) {
  EXPECT_FATAL_FAILURE(
      {
        ProgramBuilder b;
        b.create<BinaryExpression>(BinaryOp::kEqual, nullptr, b.Expr("rhs"));
      },
      "internal compiler error");
}

TEST_F(BinaryExpressionTest, Assert_Null_RHS) {
  EXPECT_FATAL_FAILURE(
      {
        ProgramBuilder b;
        b.create<BinaryExpression>(BinaryOp::kEqual, b.Expr("lhs"), nullptr);
      },
      "internal compiler error");
}

TEST_F(BinaryExpressionTest, Assert_DifferentProgramID_LHS) {
  EXPECT_FATAL_FAILURE(
      {
        ProgramBuilder b1;
        ProgramBuilder b2;
        b1.create<BinaryExpression>(BinaryOp::kEqual, b2.Expr("lhs"),
                                    b1.Expr("rhs"));
      },
      "internal compiler error");
}

TEST_F(BinaryExpressionTest, Assert_DifferentProgramID_RHS) {
  EXPECT_FATAL_FAILURE(
      {
        ProgramBuilder b1;
        ProgramBuilder b2;
        b1.create<BinaryExpression>(BinaryOp::kEqual, b1.Expr("lhs"),
                                    b2.Expr("rhs"));
      },
      "internal compiler error");
}

TEST_F(BinaryExpressionTest, ToStr) {
  auto* lhs = Expr("lhs");
  auto* rhs = Expr("rhs");

  auto* r = create<BinaryExpression>(BinaryOp::kEqual, lhs, rhs);
  EXPECT_EQ(str(r), R"(Binary[not set]{
  Identifier[not set]{lhs}
  equal
  Identifier[not set]{rhs}
}
)");
}

}  // namespace
}  // namespace ast
}  // namespace tint