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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/discard_statement.h"
#include "src/ast/else_statement.h"
#include "src/ast/identifier_expression.h"
#include "src/ast/if_statement.h"
#include "src/writer/wgsl/generator_impl.h"
namespace tint {
namespace writer {
namespace wgsl {
namespace {
using WgslGeneratorImplTest = testing::Test;
TEST_F(WgslGeneratorImplTest, Emit_If) {
auto cond = std::make_unique<ast::IdentifierExpression>("cond");
auto body = std::make_unique<ast::BlockStatement>();
body->append(std::make_unique<ast::DiscardStatement>());
ast::IfStatement i(std::move(cond), std::move(body));
GeneratorImpl g;
g.increment_indent();
ASSERT_TRUE(g.EmitStatement(&i)) << g.error();
EXPECT_EQ(g.result(), R"( if (cond) {
discard;
}
)");
}
TEST_F(WgslGeneratorImplTest, Emit_IfWithElseIf) {
auto else_cond = std::make_unique<ast::IdentifierExpression>("else_cond");
auto else_body = std::make_unique<ast::BlockStatement>();
else_body->append(std::make_unique<ast::DiscardStatement>());
ast::ElseStatementList elses;
elses.push_back(std::make_unique<ast::ElseStatement>(std::move(else_cond),
std::move(else_body)));
auto cond = std::make_unique<ast::IdentifierExpression>("cond");
auto body = std::make_unique<ast::BlockStatement>();
body->append(std::make_unique<ast::DiscardStatement>());
ast::IfStatement i(std::move(cond), std::move(body));
i.set_else_statements(std::move(elses));
GeneratorImpl g;
g.increment_indent();
ASSERT_TRUE(g.EmitStatement(&i)) << g.error();
EXPECT_EQ(g.result(), R"( if (cond) {
discard;
} elseif (else_cond) {
discard;
}
)");
}
TEST_F(WgslGeneratorImplTest, Emit_IfWithElse) {
auto else_body = std::make_unique<ast::BlockStatement>();
else_body->append(std::make_unique<ast::DiscardStatement>());
ast::ElseStatementList elses;
elses.push_back(std::make_unique<ast::ElseStatement>(std::move(else_body)));
auto cond = std::make_unique<ast::IdentifierExpression>("cond");
auto body = std::make_unique<ast::BlockStatement>();
body->append(std::make_unique<ast::DiscardStatement>());
ast::IfStatement i(std::move(cond), std::move(body));
i.set_else_statements(std::move(elses));
GeneratorImpl g;
g.increment_indent();
ASSERT_TRUE(g.EmitStatement(&i)) << g.error();
EXPECT_EQ(g.result(), R"( if (cond) {
discard;
} else {
discard;
}
)");
}
TEST_F(WgslGeneratorImplTest, Emit_IfWithMultiple) {
auto else_cond = std::make_unique<ast::IdentifierExpression>("else_cond");
auto else_body = std::make_unique<ast::BlockStatement>();
else_body->append(std::make_unique<ast::DiscardStatement>());
auto else_body_2 = std::make_unique<ast::BlockStatement>();
else_body_2->append(std::make_unique<ast::DiscardStatement>());
ast::ElseStatementList elses;
elses.push_back(std::make_unique<ast::ElseStatement>(std::move(else_cond),
std::move(else_body)));
elses.push_back(std::make_unique<ast::ElseStatement>(std::move(else_body_2)));
auto cond = std::make_unique<ast::IdentifierExpression>("cond");
auto body = std::make_unique<ast::BlockStatement>();
body->append(std::make_unique<ast::DiscardStatement>());
ast::IfStatement i(std::move(cond), std::move(body));
i.set_else_statements(std::move(elses));
GeneratorImpl g;
g.increment_indent();
ASSERT_TRUE(g.EmitStatement(&i)) << g.error();
EXPECT_EQ(g.result(), R"( if (cond) {
discard;
} elseif (else_cond) {
discard;
} else {
discard;
}
)");
}
} // namespace
} // namespace wgsl
} // namespace writer
} // namespace tint