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// Copyright 2022 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/transform/while_to_loop.h"
#include "src/tint/transform/test_helper.h"
namespace tint::transform {
namespace {
using WhileToLoopTest = TransformTest;
TEST_F(WhileToLoopTest, ShouldRunEmptyModule) {
auto* src = R"()";
EXPECT_FALSE(ShouldRun<WhileToLoop>(src));
}
TEST_F(WhileToLoopTest, ShouldRunHasWhile) {
auto* src = R"(
fn f() {
while (true) {
break;
}
}
)";
EXPECT_TRUE(ShouldRun<WhileToLoop>(src));
}
TEST_F(WhileToLoopTest, EmptyModule) {
auto* src = "";
auto* expect = src;
auto got = Run<WhileToLoop>(src);
EXPECT_EQ(expect, str(got));
}
// Test an empty for loop.
TEST_F(WhileToLoopTest, Empty) {
auto* src = R"(
fn f() {
while (true) {
break;
}
}
)";
auto* expect = R"(
fn f() {
loop {
if (!(true)) {
break;
}
break;
}
}
)";
auto got = Run<WhileToLoop>(src);
EXPECT_EQ(expect, str(got));
}
// Test a for loop with non-empty body.
TEST_F(WhileToLoopTest, Body) {
auto* src = R"(
fn f() {
while (true) {
discard;
}
}
)";
auto* expect = R"(
fn f() {
loop {
if (!(true)) {
break;
}
discard;
}
}
)";
auto got = Run<WhileToLoop>(src);
EXPECT_EQ(expect, str(got));
}
// Test a loop with a break condition
TEST_F(WhileToLoopTest, BreakCondition) {
auto* src = R"(
fn f() {
while (0 == 1) {
}
}
)";
auto* expect = R"(
fn f() {
loop {
if (!((0 == 1))) {
break;
}
}
}
)";
auto got = Run<WhileToLoop>(src);
EXPECT_EQ(expect, str(got));
}
} // namespace
} // namespace tint::transform