mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Jon Ross-Perkins
32a1be3690
Previous code could fail silently, only caught with yaml output mismatches. This uses ErrorOr to be explicit about the error detection; recovery isn't supported because we should only print valid yaml (in tests, at least). Also moves the test helpers from //toolchain/base to //toolchain/testing. Switches tree_test to use the matchers so that, on mismatch, gtest prints a path to the mismatch (the straight value means it was just printing "not equal"). Addresses https://github.com/carbon-language/carbon-lang/pull/3217#discussion_r1323586836
130 lines
5.0 KiB
C++
130 lines
5.0 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "toolchain/parse/tree.h"
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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#include <forward_list>
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#include "testing/base/test_raw_ostream.h"
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#include "toolchain/diagnostics/diagnostic_emitter.h"
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#include "toolchain/diagnostics/mocks.h"
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#include "toolchain/lex/tokenized_buffer.h"
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#include "toolchain/testing/yaml_test_helpers.h"
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namespace Carbon::Testing {
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namespace {
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using Parse::Tree;
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using ::testing::ElementsAre;
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using ::testing::Pair;
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class TreeTest : public ::testing::Test {
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protected:
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auto GetSourceBuffer(llvm::StringRef t) -> SourceBuffer& {
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CARBON_CHECK(fs.addFile("test.carbon", /*ModificationTime=*/0,
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llvm::MemoryBuffer::getMemBuffer(t)));
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source_storage.push_front(
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std::move(*SourceBuffer::CreateFromFile(fs, "test.carbon", consumer)));
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return source_storage.front();
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}
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auto GetTokenizedBuffer(llvm::StringRef t) -> Lex::TokenizedBuffer& {
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token_storage.push_front(
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Lex::TokenizedBuffer::Lex(GetSourceBuffer(t), consumer));
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return token_storage.front();
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}
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llvm::vfs::InMemoryFileSystem fs;
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std::forward_list<SourceBuffer> source_storage;
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std::forward_list<Lex::TokenizedBuffer> token_storage;
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DiagnosticConsumer& consumer = ConsoleDiagnosticConsumer();
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};
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TEST_F(TreeTest, IsValid) {
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Lex::TokenizedBuffer tokens = GetTokenizedBuffer("");
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Tree tree = Tree::Parse(tokens, consumer, /*vlog_stream=*/nullptr);
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EXPECT_TRUE((*tree.postorder().begin()).is_valid());
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}
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TEST_F(TreeTest, PrintPostorderAsYAML) {
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Lex::TokenizedBuffer tokens = GetTokenizedBuffer("fn F();");
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Tree tree = Tree::Parse(tokens, consumer, /*vlog_stream=*/nullptr);
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EXPECT_FALSE(tree.has_errors());
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TestRawOstream print_stream;
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tree.Print(print_stream);
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auto file = Yaml::Sequence(ElementsAre(
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Yaml::Mapping(
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ElementsAre(Pair("kind", "FunctionIntroducer"), Pair("text", "fn"))),
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Yaml::Mapping(ElementsAre(Pair("kind", "Name"), Pair("text", "F"))),
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Yaml::Mapping(
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ElementsAre(Pair("kind", "ParameterListStart"), Pair("text", "("))),
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Yaml::Mapping(ElementsAre(Pair("kind", "ParameterList"),
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Pair("text", ")"), Pair("subtree_size", "2"))),
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Yaml::Mapping(ElementsAre(Pair("kind", "FunctionDeclaration"),
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Pair("text", ";"), Pair("subtree_size", "5"))),
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Yaml::Mapping(ElementsAre(Pair("kind", "FileEnd"), Pair("text", "")))));
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auto root = Yaml::Sequence(ElementsAre(Yaml::Mapping(
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ElementsAre(Pair("filename", "test.carbon"), Pair("parse_tree", file)))));
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EXPECT_THAT(Yaml::Value::FromText(print_stream.TakeStr()),
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IsYaml(ElementsAre(root)));
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}
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TEST_F(TreeTest, PrintPreorderAsYAML) {
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Lex::TokenizedBuffer tokens = GetTokenizedBuffer("fn F();");
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Tree tree = Tree::Parse(tokens, consumer, /*vlog_stream=*/nullptr);
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EXPECT_FALSE(tree.has_errors());
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TestRawOstream print_stream;
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tree.Print(print_stream, /*preorder=*/true);
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auto parameter_list = Yaml::Sequence(ElementsAre(Yaml::Mapping(
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ElementsAre(Pair("node_index", "2"), Pair("kind", "ParameterListStart"),
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Pair("text", "(")))));
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auto function_decl = Yaml::Sequence(ElementsAre(
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Yaml::Mapping(ElementsAre(Pair("node_index", "0"),
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Pair("kind", "FunctionIntroducer"),
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Pair("text", "fn"))),
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Yaml::Mapping(ElementsAre(Pair("node_index", "1"), Pair("kind", "Name"),
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Pair("text", "F"))),
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Yaml::Mapping(ElementsAre(Pair("node_index", "3"),
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Pair("kind", "ParameterList"),
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Pair("text", ")"), Pair("subtree_size", "2"),
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Pair("children", parameter_list)))));
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auto file = Yaml::Sequence(ElementsAre(
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Yaml::Mapping(ElementsAre(Pair("node_index", "4"),
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Pair("kind", "FunctionDeclaration"),
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Pair("text", ";"), Pair("subtree_size", "5"),
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Pair("children", function_decl))),
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Yaml::Mapping(ElementsAre(Pair("node_index", "5"),
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Pair("kind", "FileEnd"), Pair("text", "")))));
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auto root = Yaml::Sequence(ElementsAre(Yaml::Mapping(
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ElementsAre(Pair("filename", "test.carbon"), Pair("parse_tree", file)))));
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EXPECT_THAT(Yaml::Value::FromText(print_stream.TakeStr()),
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IsYaml(ElementsAre(root)));
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}
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TEST_F(TreeTest, HighRecursion) {
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std::string code = "fn Foo() { return ";
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code.append(10000, '(');
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code.append(10000, ')');
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code += "; }";
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Lex::TokenizedBuffer tokens = GetTokenizedBuffer(code);
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ASSERT_FALSE(tokens.has_errors());
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Testing::MockDiagnosticConsumer consumer;
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Tree tree = Tree::Parse(tokens, consumer, /*vlog_stream=*/nullptr);
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EXPECT_FALSE(tree.has_errors());
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}
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} // namespace
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} // namespace Carbon::Testing
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