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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, SwitchStmt_WithoutDefault) {
auto p = parser(R"(switch a {
case 1: {}
case 2: {}
})");
auto e = p->switch_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::SwitchStatement>());
ASSERT_EQ(e->body.size(), 2u);
EXPECT_FALSE(e->body[0]->IsDefault());
EXPECT_FALSE(e->body[1]->IsDefault());
}
TEST_F(ParserImplTest, SwitchStmt_Empty) {
auto p = parser("switch a { }");
auto e = p->switch_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::SwitchStatement>());
ASSERT_EQ(e->body.size(), 0u);
}
TEST_F(ParserImplTest, SwitchStmt_DefaultInMiddle) {
auto p = parser(R"(switch a {
case 1: {}
default: {}
case 2: {}
})");
auto e = p->switch_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::SwitchStatement>());
ASSERT_EQ(e->body.size(), 3u);
ASSERT_FALSE(e->body[0]->IsDefault());
ASSERT_TRUE(e->body[1]->IsDefault());
ASSERT_FALSE(e->body[2]->IsDefault());
}
TEST_F(ParserImplTest, SwitchStmt_WithParens) {
auto p = parser("switch(a+b) { }");
auto e = p->switch_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::SwitchStatement>());
ASSERT_EQ(e->body.size(), 0u);
}
TEST_F(ParserImplTest, SwitchStmt_InvalidExpression) {
auto p = parser("switch a=b {}");
auto e = p->switch_stmt();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:9: expected '{' for switch statement");
}
TEST_F(ParserImplTest, SwitchStmt_MissingExpression) {
auto p = parser("switch {}");
auto e = p->switch_stmt();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:8: unable to parse selector expression");
}
TEST_F(ParserImplTest, SwitchStmt_MissingBracketLeft) {
auto p = parser("switch a }");
auto e = p->switch_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 '{' for switch statement");
}
TEST_F(ParserImplTest, SwitchStmt_MissingBracketRight) {
auto p = parser("switch a {");
auto e = p->switch_stmt();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:11: expected '}' for switch statement");
}
TEST_F(ParserImplTest, SwitchStmt_InvalidBody) {
auto p = parser(R"(switch a {
case: {}
})");
auto e = p->switch_stmt();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "2:7: unable to parse case selectors");
}
} // namespace
} // namespace tint::reader::wgsl