// 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 "src/ast/override_decoration.h"
#include "src/reader/wgsl/parser_impl_test_helper.h"

namespace tint {
namespace reader {
namespace wgsl {
namespace {

TEST_F(ParserImplTest, DecorationDecl_Parses) {
  auto p = parser("@override");
  auto decos = p->decoration_list();
  EXPECT_FALSE(p->has_error());
  EXPECT_FALSE(decos.errored);
  EXPECT_TRUE(decos.matched);
  ASSERT_EQ(decos.value.size(), 1u);
  auto* override_deco = decos.value[0]->As<ast::Decoration>();
  EXPECT_TRUE(override_deco->Is<ast::OverrideDecoration>());
}

TEST_F(ParserImplTest, DecorationDecl_MissingParenLeft) {
  auto p = parser("@location 1)");
  auto decos = p->decoration_list();
  EXPECT_TRUE(p->has_error());
  EXPECT_TRUE(decos.errored);
  EXPECT_FALSE(decos.matched);
  EXPECT_TRUE(decos.value.empty());
  EXPECT_EQ(p->error(), "1:11: expected '(' for location decoration");
}

TEST_F(ParserImplTest, DecorationDecl_MissingValue) {
  auto p = parser("@location()");
  auto decos = p->decoration_list();
  EXPECT_TRUE(p->has_error());
  EXPECT_TRUE(decos.errored);
  EXPECT_FALSE(decos.matched);
  EXPECT_TRUE(decos.value.empty());
  EXPECT_EQ(p->error(),
            "1:11: expected signed integer literal for location decoration");
}

TEST_F(ParserImplTest, DecorationDecl_MissingParenRight) {
  auto p = parser("@location(1");
  auto decos = p->decoration_list();
  EXPECT_TRUE(p->has_error());
  EXPECT_TRUE(decos.errored);
  EXPECT_FALSE(decos.matched);
  EXPECT_TRUE(decos.value.empty());
  EXPECT_EQ(p->error(), "1:12: expected ')' for location decoration");
}

TEST_F(ParserImplTest, DecorationDecl_InvalidDecoration) {
  auto p = parser("@invalid");
  auto decos = p->decoration_list();
  EXPECT_TRUE(p->has_error());
  EXPECT_TRUE(decos.errored);
  EXPECT_FALSE(decos.matched);
  EXPECT_TRUE(decos.value.empty());
}

// TODO(crbug.com/tint/1382): Remove
TEST_F(ParserImplTest, DEPRECATED_DecorationDecl_Parses) {
  auto p = parser("[[override]]");
  auto decos = p->decoration_list();
  EXPECT_FALSE(p->has_error());
  EXPECT_FALSE(decos.errored);
  EXPECT_TRUE(decos.matched);
  ASSERT_EQ(decos.value.size(), 1u);
  auto* override_deco = decos.value[0]->As<ast::Decoration>();
  EXPECT_TRUE(override_deco->Is<ast::OverrideDecoration>());
}

// TODO(crbug.com/tint/1382): Remove
TEST_F(ParserImplTest, DEPRECATED_DecorationDecl_MissingAttrRight) {
  auto p = parser("[[override");
  auto decos = p->decoration_list();
  EXPECT_TRUE(p->has_error());
  EXPECT_TRUE(decos.errored);
  EXPECT_FALSE(decos.matched);
  EXPECT_TRUE(decos.value.empty());
  EXPECT_EQ(
      p->error(),
      R"(1:1: use of deprecated language feature: [[decoration]] style decorations have been replaced with @decoration style
1:11: expected ']]' for decoration list)");
}

// TODO(crbug.com/tint/1382): Remove
TEST_F(ParserImplTest, DEPRECATED_DecorationDecl_InvalidDecoration) {
  auto p = parser("[[invalid]]");
  auto decos = p->decoration_list();
  EXPECT_TRUE(p->has_error());
  EXPECT_TRUE(decos.errored);
  EXPECT_FALSE(decos.matched);
  EXPECT_TRUE(decos.value.empty());
}

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