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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_impl_test_helper.h"
namespace tint {
namespace reader {
namespace wgsl {
namespace {
TEST_F(ParserImplTest, IfStmt) {
auto p = parser("if (a == 4) { a = b; c = d; }");
auto e = p->if_stmt();
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.size(), 2u);
EXPECT_EQ(e->else_statements.size(), 0u);
}
TEST_F(ParserImplTest, IfStmt_WithElse) {
auto p = parser("if (a == 4) { a = b; c = d; } elseif(c) { d = 2; } else {}");
auto e = p->if_stmt();
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.size(), 2u);
ASSERT_EQ(e->else_statements.size(), 2u);
ASSERT_NE(e->else_statements[0]->condition, nullptr);
ASSERT_TRUE(
e->else_statements[0]->condition->Is<ast::IdentifierExpression>());
EXPECT_EQ(e->else_statements[0]->body->statements.size(), 1u);
ASSERT_EQ(e->else_statements[1]->condition, nullptr);
EXPECT_EQ(e->else_statements[1]->body->statements.size(), 0u);
}
TEST_F(ParserImplTest, IfStmt_InvalidCondition) {
auto p = parser("if (a = 3) {}");
auto e = p->if_stmt();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:7: expected ')'");
}
TEST_F(ParserImplTest, IfStmt_MissingCondition) {
auto p = parser("if {}");
auto e = p->if_stmt();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:4: expected '('");
}
TEST_F(ParserImplTest, IfStmt_InvalidBody) {
auto p = parser("if (a) { fn main() {}}");
auto e = p->if_stmt();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:10: expected '}'");
}
TEST_F(ParserImplTest, IfStmt_MissingBody) {
auto p = parser("if (a)");
auto e = p->if_stmt();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:7: expected '{'");
}
TEST_F(ParserImplTest, IfStmt_InvalidElseif) {
auto p = parser("if (a) {} elseif (a) { fn main() -> a{}}");
auto e = p->if_stmt();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:24: expected '}'");
}
TEST_F(ParserImplTest, IfStmt_InvalidElse) {
auto p = parser("if (a) {} else { fn main() -> a{}}");
auto e = p->if_stmt();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:18: expected '}'");
}
} // namespace
} // namespace wgsl
} // namespace reader
} // namespace tint