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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 "gtest/gtest.h"
#include "src/ast/else_statement.h"
#include "src/ast/identifier_expression.h"
#include "src/ast/if_statement.h"
#include "src/ast/module.h"
#include "src/ast/return_statement.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_If) {
auto* cond = Expr("cond");
auto* body = create<ast::BlockStatement>(ast::StatementList{
create<ast::ReturnStatement>(),
});
auto* i = create<ast::IfStatement>(cond, body, ast::ElseStatementList{});
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(i)) << gen.error();
EXPECT_EQ(gen.result(), R"( if (cond) {
return;
}
)");
}
TEST_F(MslGeneratorImplTest, Emit_IfWithElseIf) {
auto* else_cond = Expr("else_cond");
auto* else_body = create<ast::BlockStatement>(ast::StatementList{
create<ast::ReturnStatement>(),
});
auto* cond = Expr("cond");
auto* body = create<ast::BlockStatement>(ast::StatementList{
create<ast::ReturnStatement>(),
});
auto* i = create<ast::IfStatement>(
cond, body,
ast::ElseStatementList{
create<ast::ElseStatement>(else_cond, else_body),
});
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(i)) << gen.error();
EXPECT_EQ(gen.result(), R"( if (cond) {
return;
} else if (else_cond) {
return;
}
)");
}
TEST_F(MslGeneratorImplTest, Emit_IfWithElse) {
auto* else_body = create<ast::BlockStatement>(ast::StatementList{
create<ast::ReturnStatement>(),
});
auto* cond = Expr("cond");
auto* body = create<ast::BlockStatement>(ast::StatementList{
create<ast::ReturnStatement>(),
});
auto* i = create<ast::IfStatement>(
cond, body,
ast::ElseStatementList{
create<ast::ElseStatement>(nullptr, else_body),
});
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(i)) << gen.error();
EXPECT_EQ(gen.result(), R"( if (cond) {
return;
} else {
return;
}
)");
}
TEST_F(MslGeneratorImplTest, Emit_IfWithMultiple) {
auto* else_cond = Expr("else_cond");
auto* else_body = create<ast::BlockStatement>(ast::StatementList{
create<ast::ReturnStatement>(),
});
auto* else_body_2 = create<ast::BlockStatement>(ast::StatementList{
create<ast::ReturnStatement>(),
});
auto* cond = Expr("cond");
auto* body = create<ast::BlockStatement>(ast::StatementList{
create<ast::ReturnStatement>(),
});
auto* i = create<ast::IfStatement>(
cond, body,
ast::ElseStatementList{
create<ast::ElseStatement>(else_cond, else_body),
create<ast::ElseStatement>(nullptr, else_body_2),
});
gen.increment_indent();
ASSERT_TRUE(gen.EmitStatement(i)) << gen.error();
EXPECT_EQ(gen.result(), R"( if (cond) {
return;
} else if (else_cond) {
return;
} else {
return;
}
)");
}
} // namespace
} // namespace msl
} // namespace writer
} // namespace tint