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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 "src/reader/wgsl/parser.h"
#include "gtest/gtest.h"
#include "src/ast/module.h"
namespace tint {
namespace reader {
namespace wgsl {
namespace {
using ParserTest = testing::Test;
TEST_F(ParserTest, Empty) {
Source::File file("test.wgsl", "");
auto program = Parse(&file);
auto errs = diag::Formatter().format(program.Diagnostics());
ASSERT_TRUE(program.IsValid()) << errs;
}
TEST_F(ParserTest, Parses) {
Source::File file("test.wgsl", R"(
[[stage(fragment)]]
fn main() -> [[location(0)]] vec4<f32> {
return vec4<f32>(.4, .2, .3, 1.);
}
)");
auto program = Parse(&file);
auto errs = diag::Formatter().format(program.Diagnostics());
ASSERT_TRUE(program.IsValid()) << errs;
ASSERT_EQ(1u, program.AST().Functions().size());
}
TEST_F(ParserTest, HandlesError) {
Source::File file("test.wgsl", R"(
fn main() -> { // missing return type
return;
})");
auto program = Parse(&file);
auto errs = diag::Formatter().format(program.Diagnostics());
ASSERT_FALSE(program.IsValid()) << errs;
EXPECT_EQ(errs,
R"(test.wgsl:2:15 error: unable to determine function return type
fn main() -> { // missing return type
^
)");
}
} // namespace
} // namespace wgsl
} // namespace reader
} // namespace tint