// 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, AttributeDecl_EmptyStr) {
    auto p = parser("");
    auto attrs = p->attribute_list();
    EXPECT_FALSE(p->has_error());
    EXPECT_FALSE(attrs.errored);
    EXPECT_FALSE(attrs.matched);
    EXPECT_EQ(attrs.value.Length(), 0u);
}

TEST_F(ParserImplTest, AttributeDecl_Single) {
    auto p = parser("@size(4)");
    auto attrs = p->attribute_list();
    EXPECT_FALSE(p->has_error());
    EXPECT_FALSE(attrs.errored);
    EXPECT_TRUE(attrs.matched);
    ASSERT_EQ(attrs.value.Length(), 1u);
    auto* attr = attrs.value[0]->As<ast::Attribute>();
    ASSERT_NE(attr, nullptr);
    EXPECT_TRUE(attr->Is<ast::StructMemberSizeAttribute>());
}

TEST_F(ParserImplTest, AttributeDecl_InvalidAttribute) {
    auto p = parser("@size(if)");
    auto attrs = p->attribute_list();
    EXPECT_TRUE(p->has_error()) << p->error();
    EXPECT_TRUE(attrs.errored);
    EXPECT_FALSE(attrs.matched);
    EXPECT_EQ(p->error(), "1:7: expected expression for size");
}

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