// 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.h"
#include "src/reader/wgsl/parser_impl.h"

namespace tint {
namespace reader {
namespace wgsl {

using ParserImplTest = testing::Test;

TEST_F(ParserImplTest, CaseBody_Empty) {
  ParserImpl p{""};
  auto e = p.case_body();
  ASSERT_FALSE(p.has_error()) << p.error();
  EXPECT_EQ(e.size(), 0);
}

TEST_F(ParserImplTest, CaseBody_Statements) {
  ParserImpl p{R"(
  var a: i32;
  a = 2;)"};

  auto e = p.case_body();
  ASSERT_FALSE(p.has_error()) << p.error();
  ASSERT_EQ(e.size(), 2);
  EXPECT_TRUE(e[0]->IsVariable());
  EXPECT_TRUE(e[1]->IsAssign());
}

TEST_F(ParserImplTest, CaseBody_InvalidStatement) {
  ParserImpl p{"a ="};
  auto e = p.case_body();
  ASSERT_TRUE(p.has_error());
  EXPECT_EQ(e.size(), 0);
  EXPECT_EQ(p.error(), "1:4: unable to parse right side of assignment");
}

TEST_F(ParserImplTest, CaseBody_Fallthrough) {
  ParserImpl p{"fallthrough;"};
  auto e = p.case_body();
  ASSERT_FALSE(p.has_error()) << p.error();
  ASSERT_EQ(e.size(), 1);
  EXPECT_TRUE(e[0]->IsFallthrough());
}

TEST_F(ParserImplTest, CaseBody_Fallthrough_MissingSemicolon) {
  ParserImpl p{"fallthrough"};
  auto e = p.case_body();
  ASSERT_TRUE(p.has_error());
  EXPECT_EQ(e.size(), 0);
  EXPECT_EQ(p.error(), "1:12: missing ;");
}

}  // namespace wgsl
}  // namespace reader
}  // namespace tint