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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/tint/reader/wgsl/parser_impl_test_helper.h"
namespace tint::reader::wgsl {
namespace {
TEST_F(ParserImplTest, IfStmt) {
auto p = parser("if a == 4 { a = b; c = d; }");
auto e = p->if_statement();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::IfStatement>());
ASSERT_NE(e->condition, nullptr);
ASSERT_TRUE(e->condition->Is<ast::BinaryExpression>());
EXPECT_EQ(e->body->statements.Length(), 2u);
EXPECT_EQ(e->else_statement, nullptr);
}
TEST_F(ParserImplTest, IfStmt_WithElse) {
auto p = parser("if a == 4 { a = b; c = d; } else if(c) { d = 2; } else {}");
auto e = p->if_statement();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::IfStatement>());
ASSERT_NE(e->condition, nullptr);
ASSERT_TRUE(e->condition->Is<ast::BinaryExpression>());
EXPECT_EQ(e->body->statements.Length(), 2u);
auto* elseif = As<ast::IfStatement>(e->else_statement);
ASSERT_NE(elseif, nullptr);
ASSERT_TRUE(elseif->condition->Is<ast::IdentifierExpression>());
EXPECT_EQ(elseif->body->statements.Length(), 1u);
auto* el = As<ast::BlockStatement>(elseif->else_statement);
ASSERT_NE(el, nullptr);
EXPECT_EQ(el->statements.Length(), 0u);
}
TEST_F(ParserImplTest, IfStmt_WithElse_WithParens) {
auto p = parser("if(a==4) { a = b; c = d; } else if(c) { d = 2; } else {}");
auto e = p->if_statement();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
ASSERT_TRUE(e->Is<ast::IfStatement>());
ASSERT_NE(e->condition, nullptr);
ASSERT_TRUE(e->condition->Is<ast::BinaryExpression>());
EXPECT_EQ(e->body->statements.Length(), 2u);
auto* elseif = As<ast::IfStatement>(e->else_statement);
ASSERT_NE(elseif, nullptr);
ASSERT_TRUE(elseif->condition->Is<ast::IdentifierExpression>());
EXPECT_EQ(elseif->body->statements.Length(), 1u);
auto* el = As<ast::BlockStatement>(elseif->else_statement);
ASSERT_NE(el, nullptr);
EXPECT_EQ(el->statements.Length(), 0u);
}
TEST_F(ParserImplTest, IfStmt_InvalidCondition) {
auto p = parser("if a = 3 {}");
auto e = p->if_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:6: expected '{'");
}
TEST_F(ParserImplTest, IfStmt_MissingCondition) {
auto p = parser("if {}");
auto e = p->if_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:4: unable to parse condition expression");
}
TEST_F(ParserImplTest, IfStmt_InvalidBody) {
auto p = parser("if a { fn main() {}}");
auto e = p->if_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:8: expected '}'");
}
TEST_F(ParserImplTest, IfStmt_MissingBody) {
auto p = parser("if a");
auto e = p->if_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:5: expected '{'");
}
TEST_F(ParserImplTest, IfStmt_InvalidElseif) {
auto p = parser("if a {} else if a { fn main() -> a{}}");
auto e = p->if_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:21: expected '}'");
}
TEST_F(ParserImplTest, IfStmt_InvalidElse) {
auto p = parser("if a {} else { fn main() -> a{}}");
auto e = p->if_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:16: expected '}'");
}
} // namespace
} // namespace tint::reader::wgsl