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// 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 <memory>
#include "gtest/gtest.h"
#include "src/ast/break_statement.h"
#include "src/ast/case_statement.h"
#include "src/ast/fallthrough_statement.h"
#include "src/ast/identifier_expression.h"
#include "src/ast/module.h"
#include "src/ast/sint_literal.h"
#include "src/ast/type/i32_type.h"
#include "src/writer/msl/generator_impl.h"
#include "src/writer/msl/test_helper.h"
namespace tint {
namespace writer {
namespace msl {
namespace {
using MslGeneratorImplTest = TestHelper;
TEST_F(MslGeneratorImplTest, Emit_Case) {
auto* body = create<ast::BlockStatement>(ast::StatementList{
create<ast::BreakStatement>(),
});
ast::CaseSelectorList lit;
lit.push_back(create<ast::SintLiteral>(ty.i32, 5));
auto* c = create<ast::CaseStatement>(lit, body);
gen.increment_indent();
ASSERT_TRUE(gen.EmitCase(c)) << gen.error();
EXPECT_EQ(gen.result(), R"( case 5: {
break;
}
)");
}
TEST_F(MslGeneratorImplTest, Emit_Case_BreaksByDefault) {
ast::CaseSelectorList lit;
lit.push_back(create<ast::SintLiteral>(ty.i32, 5));
auto* c = create<ast::CaseStatement>(
lit, create<ast::BlockStatement>(ast::StatementList{}));
gen.increment_indent();
ASSERT_TRUE(gen.EmitCase(c)) << gen.error();
EXPECT_EQ(gen.result(), R"( case 5: {
break;
}
)");
}
TEST_F(MslGeneratorImplTest, Emit_Case_WithFallthrough) {
auto* body = create<ast::BlockStatement>(ast::StatementList{
create<ast::FallthroughStatement>(),
});
ast::CaseSelectorList lit;
lit.push_back(create<ast::SintLiteral>(ty.i32, 5));
auto* c = create<ast::CaseStatement>(lit, body);
gen.increment_indent();
ASSERT_TRUE(gen.EmitCase(c)) << gen.error();
EXPECT_EQ(gen.result(), R"( case 5: {
/* fallthrough */
}
)");
}
TEST_F(MslGeneratorImplTest, Emit_Case_MultipleSelectors) {
auto* body = create<ast::BlockStatement>(ast::StatementList{
create<ast::BreakStatement>(),
});
ast::CaseSelectorList lit;
lit.push_back(create<ast::SintLiteral>(ty.i32, 5));
lit.push_back(create<ast::SintLiteral>(ty.i32, 6));
auto* c = create<ast::CaseStatement>(lit, body);
gen.increment_indent();
ASSERT_TRUE(gen.EmitCase(c)) << gen.error();
EXPECT_EQ(gen.result(), R"( case 5:
case 6: {
break;
}
)");
}
TEST_F(MslGeneratorImplTest, Emit_Case_Default) {
auto* body = create<ast::BlockStatement>(ast::StatementList{
create<ast::BreakStatement>(),
});
auto* c = create<ast::CaseStatement>(ast::CaseSelectorList{}, body);
gen.increment_indent();
ASSERT_TRUE(gen.EmitCase(c)) << gen.error();
EXPECT_EQ(gen.result(), R"( default: {
break;
}
)");
}
} // namespace
} // namespace msl
} // namespace writer
} // namespace tint