// 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/tint/reader/wgsl/parser_impl_test_helper.h"

namespace tint::reader::wgsl {
namespace {

TEST_F(ParserImplTest, Attribute_Size) {
  auto p = parser("size(4)");
  auto attr = p->attribute();
  EXPECT_TRUE(attr.matched);
  EXPECT_FALSE(attr.errored);
  ASSERT_NE(attr.value, nullptr);
  ASSERT_FALSE(p->has_error());

  auto* member_attr = attr.value->As<ast::Attribute>();
  ASSERT_NE(member_attr, nullptr);
  ASSERT_TRUE(member_attr->Is<ast::StructMemberSizeAttribute>());

  auto* o = member_attr->As<ast::StructMemberSizeAttribute>();
  EXPECT_EQ(o->size, 4u);
}

TEST_F(ParserImplTest, Attribute_Size_MissingLeftParen) {
  auto p = parser("size 4)");
  auto attr = p->attribute();
  EXPECT_FALSE(attr.matched);
  EXPECT_TRUE(attr.errored);
  EXPECT_EQ(attr.value, nullptr);
  EXPECT_TRUE(p->has_error());
  EXPECT_EQ(p->error(), "1:6: expected '(' for size attribute");
}

TEST_F(ParserImplTest, Attribute_Size_MissingRightParen) {
  auto p = parser("size(4");
  auto attr = p->attribute();
  EXPECT_FALSE(attr.matched);
  EXPECT_TRUE(attr.errored);
  EXPECT_EQ(attr.value, nullptr);
  EXPECT_TRUE(p->has_error());
  EXPECT_EQ(p->error(), "1:7: expected ')' for size attribute");
}

TEST_F(ParserImplTest, Attribute_Size_MissingValue) {
  auto p = parser("size()");
  auto attr = p->attribute();
  EXPECT_FALSE(attr.matched);
  EXPECT_TRUE(attr.errored);
  EXPECT_EQ(attr.value, nullptr);
  EXPECT_TRUE(p->has_error());
  EXPECT_EQ(p->error(),
            "1:6: expected signed integer literal for size attribute");
}

TEST_F(ParserImplTest, Attribute_Size_MissingInvalid) {
  auto p = parser("size(nan)");
  auto attr = p->attribute();
  EXPECT_FALSE(attr.matched);
  EXPECT_TRUE(attr.errored);
  EXPECT_EQ(attr.value, nullptr);
  EXPECT_TRUE(p->has_error());
  EXPECT_EQ(p->error(),
            "1:6: expected signed integer literal for size attribute");
}

TEST_F(ParserImplTest, Attribute_Align) {
  auto p = parser("align(4)");
  auto attr = p->attribute();
  EXPECT_TRUE(attr.matched);
  EXPECT_FALSE(attr.errored);
  ASSERT_NE(attr.value, nullptr);
  ASSERT_FALSE(p->has_error());

  auto* member_attr = attr.value->As<ast::Attribute>();
  ASSERT_NE(member_attr, nullptr);
  ASSERT_TRUE(member_attr->Is<ast::StructMemberAlignAttribute>());

  auto* o = member_attr->As<ast::StructMemberAlignAttribute>();
  EXPECT_EQ(o->align, 4u);
}

TEST_F(ParserImplTest, Attribute_Align_MissingLeftParen) {
  auto p = parser("align 4)");
  auto attr = p->attribute();
  EXPECT_FALSE(attr.matched);
  EXPECT_TRUE(attr.errored);
  EXPECT_EQ(attr.value, nullptr);
  EXPECT_TRUE(p->has_error());
  EXPECT_EQ(p->error(), "1:7: expected '(' for align attribute");
}

TEST_F(ParserImplTest, Attribute_Align_MissingRightParen) {
  auto p = parser("align(4");
  auto attr = p->attribute();
  EXPECT_FALSE(attr.matched);
  EXPECT_TRUE(attr.errored);
  EXPECT_EQ(attr.value, nullptr);
  EXPECT_TRUE(p->has_error());
  EXPECT_EQ(p->error(), "1:8: expected ')' for align attribute");
}

TEST_F(ParserImplTest, Attribute_Align_MissingValue) {
  auto p = parser("align()");
  auto attr = p->attribute();
  EXPECT_FALSE(attr.matched);
  EXPECT_TRUE(attr.errored);
  EXPECT_EQ(attr.value, nullptr);
  EXPECT_TRUE(p->has_error());
  EXPECT_EQ(p->error(),
            "1:7: expected signed integer literal for align attribute");
}

TEST_F(ParserImplTest, Attribute_Align_MissingInvalid) {
  auto p = parser("align(nan)");
  auto attr = p->attribute();
  EXPECT_FALSE(attr.matched);
  EXPECT_TRUE(attr.errored);
  EXPECT_EQ(attr.value, nullptr);
  EXPECT_TRUE(p->has_error());
  EXPECT_EQ(p->error(),
            "1:7: expected signed integer literal for align attribute");
}

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