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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/binary_expression.h"
#include "src/ast/bool_literal.h"
#include "src/ast/identifier_expression.h"
#include "src/ast/scalar_constructor_expression.h"
#include "src/reader/wgsl/parser_impl.h"
#include "src/reader/wgsl/parser_impl_test_helper.h"
namespace tint {
namespace reader {
namespace wgsl {
namespace {
TEST_F(ParserImplTest, AdditiveExpression_Parses_Plus) {
auto* p = parser("a + true");
auto e = p->additive_expression();
ASSERT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e, nullptr);
ASSERT_TRUE(e->IsBinary());
auto* rel = e->AsBinary();
EXPECT_EQ(ast::BinaryOp::kAdd, rel->op());
ASSERT_TRUE(rel->lhs()->IsIdentifier());
auto* ident = rel->lhs()->AsIdentifier();
EXPECT_EQ(ident->name(), "a");
ASSERT_TRUE(rel->rhs()->IsConstructor());
ASSERT_TRUE(rel->rhs()->AsConstructor()->IsScalarConstructor());
auto* init = rel->rhs()->AsConstructor()->AsScalarConstructor();
ASSERT_TRUE(init->literal()->IsBool());
ASSERT_TRUE(init->literal()->AsBool()->IsTrue());
}
TEST_F(ParserImplTest, AdditiveExpression_Parses_Minus) {
auto* p = parser("a - true");
auto e = p->additive_expression();
ASSERT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e, nullptr);
ASSERT_TRUE(e->IsBinary());
auto* rel = e->AsBinary();
EXPECT_EQ(ast::BinaryOp::kSubtract, rel->op());
ASSERT_TRUE(rel->lhs()->IsIdentifier());
auto* ident = rel->lhs()->AsIdentifier();
EXPECT_EQ(ident->name(), "a");
ASSERT_TRUE(rel->rhs()->IsConstructor());
ASSERT_TRUE(rel->rhs()->AsConstructor()->IsScalarConstructor());
auto* init = rel->rhs()->AsConstructor()->AsScalarConstructor();
ASSERT_TRUE(init->literal()->IsBool());
ASSERT_TRUE(init->literal()->AsBool()->IsTrue());
}
TEST_F(ParserImplTest, AdditiveExpression_InvalidLHS) {
auto* p = parser("if (a) {} + true");
auto e = p->additive_expression();
ASSERT_FALSE(p->has_error()) << p->error();
ASSERT_EQ(e, nullptr);
}
TEST_F(ParserImplTest, AdditiveExpression_InvalidRHS) {
auto* p = parser("true + if (a) {}");
auto e = p->additive_expression();
ASSERT_TRUE(p->has_error());
ASSERT_EQ(e, nullptr);
EXPECT_EQ(p->error(), "1:8: unable to parse right side of + expression");
}
TEST_F(ParserImplTest, AdditiveExpression_NoOr_ReturnsLHS) {
auto* p = parser("a true");
auto e = p->additive_expression();
ASSERT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e, nullptr);
ASSERT_TRUE(e->IsIdentifier());
}
} // namespace
} // namespace wgsl
} // namespace reader
} // namespace tint