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346 lines
12 KiB
346 lines
12 KiB
//===- unittest/Support/YAMLParserTest ------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/YAMLParser.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/SourceMgr.h"
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#include "gtest/gtest.h"
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namespace llvm {
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static void SuppressDiagnosticsOutput(const SMDiagnostic &, void *) {
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// Prevent SourceMgr from writing errors to stderr
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// to reduce noise in unit test runs.
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}
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// Assumes Ctx is an SMDiagnostic where Diag can be stored.
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static void CollectDiagnosticsOutput(const SMDiagnostic &Diag, void *Ctx) {
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SMDiagnostic* DiagOut = static_cast<SMDiagnostic*>(Ctx);
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*DiagOut = Diag;
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}
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// Checks that the given input gives a parse error. Makes sure that an error
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// text is available and the parse fails.
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static void ExpectParseError(StringRef Message, StringRef Input) {
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SourceMgr SM;
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yaml::Stream Stream(Input, SM);
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SM.setDiagHandler(SuppressDiagnosticsOutput);
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EXPECT_FALSE(Stream.validate()) << Message << ": " << Input;
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EXPECT_TRUE(Stream.failed()) << Message << ": " << Input;
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}
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// Checks that the given input can be parsed without error.
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static void ExpectParseSuccess(StringRef Message, StringRef Input) {
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SourceMgr SM;
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yaml::Stream Stream(Input, SM);
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EXPECT_TRUE(Stream.validate()) << Message << ": " << Input;
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}
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TEST(YAMLParser, ParsesEmptyArray) {
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ExpectParseSuccess("Empty array", "[]");
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}
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TEST(YAMLParser, FailsIfNotClosingArray) {
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ExpectParseError("Not closing array", "[");
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ExpectParseError("Not closing array", " [ ");
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ExpectParseError("Not closing array", " [x");
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}
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TEST(YAMLParser, ParsesEmptyArrayWithWhitespace) {
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ExpectParseSuccess("Array with spaces", " [ ] ");
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ExpectParseSuccess("All whitespaces", "\t\r\n[\t\n \t\r ]\t\r \n\n");
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}
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TEST(YAMLParser, ParsesEmptyObject) {
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ExpectParseSuccess("Empty object", "[{}]");
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}
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TEST(YAMLParser, ParsesObject) {
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ExpectParseSuccess("Object with an entry", "[{\"a\":\"/b\"}]");
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}
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TEST(YAMLParser, ParsesMultipleKeyValuePairsInObject) {
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ExpectParseSuccess("Multiple key, value pairs",
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"[{\"a\":\"/b\",\"c\":\"d\",\"e\":\"f\"}]");
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}
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TEST(YAMLParser, FailsIfNotClosingObject) {
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ExpectParseError("Missing close on empty", "[{]");
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ExpectParseError("Missing close after pair", "[{\"a\":\"b\"]");
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}
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TEST(YAMLParser, FailsIfMissingColon) {
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ExpectParseError("Missing colon between key and value", "[{\"a\"\"/b\"}]");
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ExpectParseError("Missing colon between key and value", "[{\"a\" \"b\"}]");
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}
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TEST(YAMLParser, FailsOnMissingQuote) {
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ExpectParseError("Missing open quote", "[{a\":\"b\"}]");
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ExpectParseError("Missing closing quote", "[{\"a\":\"b}]");
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}
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TEST(YAMLParser, ParsesEscapedQuotes) {
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ExpectParseSuccess("Parses escaped string in key and value",
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"[{\"a\":\"\\\"b\\\" \\\" \\\"\"}]");
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}
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TEST(YAMLParser, ParsesEmptyString) {
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ExpectParseSuccess("Parses empty string in value", "[{\"a\":\"\"}]");
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}
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TEST(YAMLParser, ParsesMultipleObjects) {
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ExpectParseSuccess(
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"Multiple objects in array",
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"["
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" { \"a\" : \"b\" },"
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" { \"a\" : \"b\" },"
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" { \"a\" : \"b\" }"
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"]");
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}
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TEST(YAMLParser, FailsOnMissingComma) {
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ExpectParseError(
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"Missing comma",
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"["
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" { \"a\" : \"b\" }"
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" { \"a\" : \"b\" }"
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"]");
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}
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TEST(YAMLParser, ParsesSpacesInBetweenTokens) {
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ExpectParseSuccess(
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"Various whitespace between tokens",
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" \t \n\n \r [ \t \n\n \r"
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" \t \n\n \r { \t \n\n \r\"a\"\t \n\n \r :"
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" \t \n\n \r \"b\"\t \n\n \r } \t \n\n \r,\t \n\n \r"
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" \t \n\n \r { \t \n\n \r\"a\"\t \n\n \r :"
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" \t \n\n \r \"b\"\t \n\n \r } \t \n\n \r]\t \n\n \r");
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}
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TEST(YAMLParser, ParsesArrayOfArrays) {
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ExpectParseSuccess("Array of arrays", "[[]]");
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}
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TEST(YAMLParser, ParsesBlockLiteralScalars) {
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ExpectParseSuccess("Block literal scalar", "test: |\n Hello\n World\n");
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ExpectParseSuccess("Block literal scalar EOF", "test: |\n Hello\n World");
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ExpectParseSuccess("Empty block literal scalar header EOF", "test: | ");
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ExpectParseSuccess("Empty block literal scalar", "test: |\ntest2: 20");
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ExpectParseSuccess("Empty block literal scalar 2", "- | \n \n\n \n- 42");
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ExpectParseSuccess("Block literal scalar in sequence",
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"- |\n Testing\n Out\n\n- 22");
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ExpectParseSuccess("Block literal scalar in document",
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"--- |\n Document\n...");
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ExpectParseSuccess("Empty non indented lines still count",
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"- |\n First line\n \n\n Another line\n\n- 2");
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ExpectParseSuccess("Comment in block literal scalar header",
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"test: | # Comment \n No Comment\ntest 2: | # Void");
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ExpectParseSuccess("Chomping indicators in block literal scalar header",
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"test: |- \n Hello\n\ntest 2: |+ \n\n World\n\n\n");
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ExpectParseSuccess("Indent indicators in block literal scalar header",
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"test: |1 \n \n Hello \n World\n");
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ExpectParseSuccess("Chomping and indent indicators in block literals",
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"test: |-1\n Hello\ntest 2: |9+\n World");
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ExpectParseSuccess("Trailing comments in block literals",
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"test: |\n Content\n # Trailing\n #Comment\ntest 2: 3");
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ExpectParseError("Invalid block scalar header", "test: | failure");
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ExpectParseError("Invalid line indentation", "test: |\n First line\n Error");
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ExpectParseError("Long leading space line", "test: |\n \n Test\n");
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}
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TEST(YAMLParser, NullTerminatedBlockScalars) {
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SourceMgr SM;
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yaml::Stream Stream("test: |\n Hello\n World\n", SM);
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yaml::Document &Doc = *Stream.begin();
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yaml::MappingNode *Map = cast<yaml::MappingNode>(Doc.getRoot());
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StringRef Value =
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cast<yaml::BlockScalarNode>(Map->begin()->getValue())->getValue();
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EXPECT_EQ(Value, "Hello\nWorld\n");
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EXPECT_EQ(Value.data()[Value.size()], '\0');
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}
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TEST(YAMLParser, HandlesEndOfFileGracefully) {
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ExpectParseError("In string starting with EOF", "[\"");
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ExpectParseError("In string hitting EOF", "[\" ");
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ExpectParseError("In string escaping EOF", "[\" \\");
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ExpectParseError("In array starting with EOF", "[");
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ExpectParseError("In array element starting with EOF", "[[], ");
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ExpectParseError("In array hitting EOF", "[[] ");
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ExpectParseError("In array hitting EOF", "[[]");
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ExpectParseError("In object hitting EOF", "{\"\"");
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}
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TEST(YAMLParser, HandlesNullValuesInKeyValueNodesGracefully) {
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ExpectParseError("KeyValueNode with null key", "? \"\n:");
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ExpectParseError("KeyValueNode with null value", "test: '");
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}
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// Checks that the given string can be parsed into an identical string inside
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// of an array.
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static void ExpectCanParseString(StringRef String) {
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std::string StringInArray = (llvm::Twine("[\"") + String + "\"]").str();
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SourceMgr SM;
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yaml::Stream Stream(StringInArray, SM);
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yaml::SequenceNode *ParsedSequence
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= dyn_cast<yaml::SequenceNode>(Stream.begin()->getRoot());
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StringRef ParsedString
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= dyn_cast<yaml::ScalarNode>(
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static_cast<yaml::Node*>(ParsedSequence->begin()))->getRawValue();
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ParsedString = ParsedString.substr(1, ParsedString.size() - 2);
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EXPECT_EQ(String, ParsedString.str());
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}
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// Checks that parsing the given string inside an array fails.
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static void ExpectCannotParseString(StringRef String) {
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std::string StringInArray = (llvm::Twine("[\"") + String + "\"]").str();
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ExpectParseError((Twine("When parsing string \"") + String + "\"").str(),
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StringInArray);
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}
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TEST(YAMLParser, ParsesStrings) {
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ExpectCanParseString("");
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ExpectCannotParseString("\\");
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ExpectCannotParseString("\"");
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ExpectCanParseString(" ");
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ExpectCanParseString("\\ ");
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ExpectCanParseString("\\\"");
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ExpectCannotParseString("\"\\");
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ExpectCannotParseString(" \\");
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ExpectCanParseString("\\\\");
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ExpectCannotParseString("\\\\\\");
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ExpectCanParseString("\\\\\\\\");
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ExpectCanParseString("\\\" ");
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ExpectCannotParseString("\\\\\" ");
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ExpectCanParseString("\\\\\\\" ");
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ExpectCanParseString(" \\\\ \\\" \\\\\\\" ");
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}
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TEST(YAMLParser, WorksWithIteratorAlgorithms) {
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SourceMgr SM;
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yaml::Stream Stream("[\"1\", \"2\", \"3\", \"4\", \"5\", \"6\"]", SM);
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yaml::SequenceNode *Array
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= dyn_cast<yaml::SequenceNode>(Stream.begin()->getRoot());
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EXPECT_EQ(6, std::distance(Array->begin(), Array->end()));
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}
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TEST(YAMLParser, DefaultDiagnosticFilename) {
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SourceMgr SM;
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SMDiagnostic GeneratedDiag;
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SM.setDiagHandler(CollectDiagnosticsOutput, &GeneratedDiag);
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// When we construct a YAML stream over an unnamed string,
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// the filename is hard-coded as "YAML".
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yaml::Stream UnnamedStream("[]", SM);
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UnnamedStream.printError(UnnamedStream.begin()->getRoot(), "Hello, World!");
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EXPECT_EQ("YAML", GeneratedDiag.getFilename());
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}
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TEST(YAMLParser, DiagnosticFilenameFromBufferID) {
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SourceMgr SM;
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SMDiagnostic GeneratedDiag;
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SM.setDiagHandler(CollectDiagnosticsOutput, &GeneratedDiag);
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// When we construct a YAML stream over a named buffer,
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// we get its ID as filename in diagnostics.
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std::unique_ptr<MemoryBuffer> Buffer =
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MemoryBuffer::getMemBuffer("[]", "buffername.yaml");
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yaml::Stream Stream(Buffer->getMemBufferRef(), SM);
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Stream.printError(Stream.begin()->getRoot(), "Hello, World!");
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EXPECT_EQ("buffername.yaml", GeneratedDiag.getFilename());
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}
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TEST(YAMLParser, SameNodeIteratorOperatorNotEquals) {
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SourceMgr SM;
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yaml::Stream Stream("[\"1\", \"2\"]", SM);
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yaml::SequenceNode *Node = dyn_cast<yaml::SequenceNode>(
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Stream.begin()->getRoot());
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auto Begin = Node->begin();
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auto End = Node->end();
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EXPECT_TRUE(Begin != End);
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EXPECT_FALSE(Begin != Begin);
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EXPECT_FALSE(End != End);
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}
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TEST(YAMLParser, SameNodeIteratorOperatorEquals) {
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SourceMgr SM;
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yaml::Stream Stream("[\"1\", \"2\"]", SM);
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yaml::SequenceNode *Node = dyn_cast<yaml::SequenceNode>(
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Stream.begin()->getRoot());
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auto Begin = Node->begin();
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auto End = Node->end();
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EXPECT_FALSE(Begin == End);
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EXPECT_TRUE(Begin == Begin);
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EXPECT_TRUE(End == End);
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}
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TEST(YAMLParser, DifferentNodesIteratorOperatorNotEquals) {
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SourceMgr SM;
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yaml::Stream Stream("[\"1\", \"2\"]", SM);
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yaml::Stream AnotherStream("[\"1\", \"2\"]", SM);
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yaml::SequenceNode *Node = dyn_cast<yaml::SequenceNode>(
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Stream.begin()->getRoot());
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yaml::SequenceNode *AnotherNode = dyn_cast<yaml::SequenceNode>(
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AnotherStream.begin()->getRoot());
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auto Begin = Node->begin();
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auto End = Node->end();
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auto AnotherBegin = AnotherNode->begin();
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auto AnotherEnd = AnotherNode->end();
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EXPECT_TRUE(Begin != AnotherBegin);
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EXPECT_TRUE(Begin != AnotherEnd);
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EXPECT_FALSE(End != AnotherEnd);
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}
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TEST(YAMLParser, DifferentNodesIteratorOperatorEquals) {
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SourceMgr SM;
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yaml::Stream Stream("[\"1\", \"2\"]", SM);
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yaml::Stream AnotherStream("[\"1\", \"2\"]", SM);
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yaml::SequenceNode *Node = dyn_cast<yaml::SequenceNode>(
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Stream.begin()->getRoot());
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yaml::SequenceNode *AnotherNode = dyn_cast<yaml::SequenceNode>(
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AnotherStream.begin()->getRoot());
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auto Begin = Node->begin();
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auto End = Node->end();
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auto AnotherBegin = AnotherNode->begin();
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auto AnotherEnd = AnotherNode->end();
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EXPECT_FALSE(Begin == AnotherBegin);
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EXPECT_FALSE(Begin == AnotherEnd);
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EXPECT_TRUE(End == AnotherEnd);
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}
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TEST(YAMLParser, FlowSequenceTokensOutsideFlowSequence) {
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auto FlowSequenceStrs = {",", "]", "}"};
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SourceMgr SM;
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for (auto &Str : FlowSequenceStrs) {
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yaml::Stream Stream(Str, SM);
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yaml::Document &Doc = *Stream.begin();
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EXPECT_FALSE(Doc.skip());
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}
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}
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} // end namespace llvm
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