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//===- unittest/Support/YAMLParserTest ------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/YAMLParser.h"
#include "gtest/gtest.h"
namespace llvm {
static void SuppressDiagnosticsOutput(const SMDiagnostic &, void *) {
// Prevent SourceMgr from writing errors to stderr
// to reduce noise in unit test runs.
}
// Assumes Ctx is an SMDiagnostic where Diag can be stored.
static void CollectDiagnosticsOutput(const SMDiagnostic &Diag, void *Ctx) {
SMDiagnostic* DiagOut = static_cast<SMDiagnostic*>(Ctx);
*DiagOut = Diag;
}
// Checks that the given input gives a parse error. Makes sure that an error
// text is available and the parse fails.
static void ExpectParseError(StringRef Message, StringRef Input) {
SourceMgr SM;
yaml::Stream Stream(Input, SM);
SM.setDiagHandler(SuppressDiagnosticsOutput);
EXPECT_FALSE(Stream.validate()) << Message << ": " << Input;
EXPECT_TRUE(Stream.failed()) << Message << ": " << Input;
}
// Checks that the given input can be parsed without error.
static void ExpectParseSuccess(StringRef Message, StringRef Input) {
SourceMgr SM;
yaml::Stream Stream(Input, SM);
EXPECT_TRUE(Stream.validate()) << Message << ": " << Input;
}
TEST(YAMLParser, ParsesEmptyArray) {
ExpectParseSuccess("Empty array", "[]");
}
TEST(YAMLParser, FailsIfNotClosingArray) {
ExpectParseError("Not closing array", "[");
ExpectParseError("Not closing array", " [ ");
ExpectParseError("Not closing array", " [x");
}
TEST(YAMLParser, ParsesEmptyArrayWithWhitespace) {
ExpectParseSuccess("Array with spaces", " [ ] ");
ExpectParseSuccess("All whitespaces", "\t\r\n[\t\n \t\r ]\t\r \n\n");
}
TEST(YAMLParser, ParsesEmptyObject) {
ExpectParseSuccess("Empty object", "[{}]");
}
TEST(YAMLParser, ParsesObject) {
ExpectParseSuccess("Object with an entry", "[{\"a\":\"/b\"}]");
}
TEST(YAMLParser, ParsesMultipleKeyValuePairsInObject) {
ExpectParseSuccess("Multiple key, value pairs",
"[{\"a\":\"/b\",\"c\":\"d\",\"e\":\"f\"}]");
}
TEST(YAMLParser, FailsIfNotClosingObject) {
ExpectParseError("Missing close on empty", "[{]");
ExpectParseError("Missing close after pair", "[{\"a\":\"b\"]");
}
TEST(YAMLParser, FailsIfMissingColon) {
ExpectParseError("Missing colon between key and value", "[{\"a\"\"/b\"}]");
ExpectParseError("Missing colon between key and value", "[{\"a\" \"b\"}]");
}
TEST(YAMLParser, FailsOnMissingQuote) {
ExpectParseError("Missing open quote", "[{a\":\"b\"}]");
ExpectParseError("Missing closing quote", "[{\"a\":\"b}]");
}
TEST(YAMLParser, ParsesEscapedQuotes) {
ExpectParseSuccess("Parses escaped string in key and value",
"[{\"a\":\"\\\"b\\\" \\\" \\\"\"}]");
}
TEST(YAMLParser, ParsesEmptyString) {
ExpectParseSuccess("Parses empty string in value", "[{\"a\":\"\"}]");
}
TEST(YAMLParser, ParsesMultipleObjects) {
ExpectParseSuccess(
"Multiple objects in array",
"["
" { \"a\" : \"b\" },"
" { \"a\" : \"b\" },"
" { \"a\" : \"b\" }"
"]");
}
TEST(YAMLParser, FailsOnMissingComma) {
ExpectParseError(
"Missing comma",
"["
" { \"a\" : \"b\" }"
" { \"a\" : \"b\" }"
"]");
}
TEST(YAMLParser, ParsesSpacesInBetweenTokens) {
ExpectParseSuccess(
"Various whitespace between tokens",
" \t \n\n \r [ \t \n\n \r"
" \t \n\n \r { \t \n\n \r\"a\"\t \n\n \r :"
" \t \n\n \r \"b\"\t \n\n \r } \t \n\n \r,\t \n\n \r"
" \t \n\n \r { \t \n\n \r\"a\"\t \n\n \r :"
" \t \n\n \r \"b\"\t \n\n \r } \t \n\n \r]\t \n\n \r");
}
TEST(YAMLParser, ParsesArrayOfArrays) {
ExpectParseSuccess("Array of arrays", "[[]]");
}
TEST(YAMLParser, HandlesEndOfFileGracefully) {
ExpectParseError("In string starting with EOF", "[\"");
ExpectParseError("In string hitting EOF", "[\" ");
ExpectParseError("In string escaping EOF", "[\" \\");
ExpectParseError("In array starting with EOF", "[");
ExpectParseError("In array element starting with EOF", "[[], ");
ExpectParseError("In array hitting EOF", "[[] ");
ExpectParseError("In array hitting EOF", "[[]");
ExpectParseError("In object hitting EOF", "{\"\"");
}
// Checks that the given string can be parsed into an identical string inside
// of an array.
static void ExpectCanParseString(StringRef String) {
std::string StringInArray = (llvm::Twine("[\"") + String + "\"]").str();
SourceMgr SM;
yaml::Stream Stream(StringInArray, SM);
yaml::SequenceNode *ParsedSequence
= dyn_cast<yaml::SequenceNode>(Stream.begin()->getRoot());
StringRef ParsedString
= dyn_cast<yaml::ScalarNode>(
static_cast<yaml::Node*>(ParsedSequence->begin()))->getRawValue();
ParsedString = ParsedString.substr(1, ParsedString.size() - 2);
EXPECT_EQ(String, ParsedString.str());
}
// Checks that parsing the given string inside an array fails.
static void ExpectCannotParseString(StringRef String) {
std::string StringInArray = (llvm::Twine("[\"") + String + "\"]").str();
ExpectParseError((Twine("When parsing string \"") + String + "\"").str(),
StringInArray);
}
TEST(YAMLParser, ParsesStrings) {
ExpectCanParseString("");
ExpectCannotParseString("\\");
ExpectCannotParseString("\"");
ExpectCanParseString(" ");
ExpectCanParseString("\\ ");
ExpectCanParseString("\\\"");
ExpectCannotParseString("\"\\");
ExpectCannotParseString(" \\");
ExpectCanParseString("\\\\");
ExpectCannotParseString("\\\\\\");
ExpectCanParseString("\\\\\\\\");
ExpectCanParseString("\\\" ");
ExpectCannotParseString("\\\\\" ");
ExpectCanParseString("\\\\\\\" ");
ExpectCanParseString(" \\\\ \\\" \\\\\\\" ");
}
TEST(YAMLParser, WorksWithIteratorAlgorithms) {
SourceMgr SM;
yaml::Stream Stream("[\"1\", \"2\", \"3\", \"4\", \"5\", \"6\"]", SM);
yaml::SequenceNode *Array
= dyn_cast<yaml::SequenceNode>(Stream.begin()->getRoot());
EXPECT_EQ(6, std::distance(Array->begin(), Array->end()));
}
TEST(YAMLParser, DefaultDiagnosticFilename) {
SourceMgr SM;
SMDiagnostic GeneratedDiag;
SM.setDiagHandler(CollectDiagnosticsOutput, &GeneratedDiag);
// When we construct a YAML stream over an unnamed string,
// the filename is hard-coded as "YAML".
yaml::Stream UnnamedStream("[]", SM);
UnnamedStream.printError(UnnamedStream.begin()->getRoot(), "Hello, World!");
EXPECT_EQ("YAML", GeneratedDiag.getFilename());
}
TEST(YAMLParser, DiagnosticFilenameFromBufferID) {
SourceMgr SM;
SMDiagnostic GeneratedDiag;
SM.setDiagHandler(CollectDiagnosticsOutput, &GeneratedDiag);
// When we construct a YAML stream over a named buffer,
// we get its ID as filename in diagnostics.
std::unique_ptr<MemoryBuffer> Buffer =
MemoryBuffer::getMemBuffer("[]", "buffername.yaml");
yaml::Stream Stream(Buffer->getMemBufferRef(), SM);
Stream.printError(Stream.begin()->getRoot(), "Hello, World!");
EXPECT_EQ("buffername.yaml", GeneratedDiag.getFilename());
}
} // end namespace llvm
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