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// Copyright 2021 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/lang/glsl/writer/ast_printer/helper_test.h"
#include "gmock/gmock.h"
namespace tint::glsl::writer {
namespace {
using GlslASTPrinterTest_If = TestHelper;
TEST_F(GlslASTPrinterTest_If, Emit_If) {
GlobalVar("cond", ty.bool_(), core::AddressSpace::kPrivate);
auto* cond = Expr("cond");
auto* body = Block(Return());
auto* i = If(cond, body);
WrapInFunction(i);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(i);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( if (cond) {
return;
}
)");
}
TEST_F(GlslASTPrinterTest_If, Emit_IfWithElseIf) {
GlobalVar("cond", ty.bool_(), core::AddressSpace::kPrivate);
GlobalVar("else_cond", ty.bool_(), core::AddressSpace::kPrivate);
auto* else_cond = Expr("else_cond");
auto* else_body = Block(Return());
auto* cond = Expr("cond");
auto* body = Block(Return());
auto* i = If(cond, body, Else(If(else_cond, else_body)));
WrapInFunction(i);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(i);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( if (cond) {
return;
} else {
if (else_cond) {
return;
}
}
)");
}
TEST_F(GlslASTPrinterTest_If, Emit_IfWithElse) {
GlobalVar("cond", ty.bool_(), core::AddressSpace::kPrivate);
auto* else_body = Block(Return());
auto* cond = Expr("cond");
auto* body = Block(Return());
auto* i = If(cond, body, Else(else_body));
WrapInFunction(i);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(i);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( if (cond) {
return;
} else {
return;
}
)");
}
TEST_F(GlslASTPrinterTest_If, Emit_IfWithMultiple) {
GlobalVar("cond", ty.bool_(), core::AddressSpace::kPrivate);
GlobalVar("else_cond", ty.bool_(), core::AddressSpace::kPrivate);
auto* else_cond = Expr("else_cond");
auto* else_body = Block(Return());
auto* else_body_2 = Block(Return());
auto* cond = Expr("cond");
auto* body = Block(Return());
auto* i = If(cond, body, Else(If(else_cond, else_body, Else(else_body_2))));
WrapInFunction(i);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(i);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( if (cond) {
return;
} else {
if (else_cond) {
return;
} else {
return;
}
}
)");
}
} // namespace
} // namespace tint::glsl::writer