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//===-- JSONExprTests.cpp - JSON expression unit tests ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "JSONExpr.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
namespace clang {
namespace clangd {
namespace json {
void PrintTo(const Expr &E, std::ostream *OS) {
llvm::raw_os_ostream(*OS) << llvm::formatv("{0:2}", E);
}
namespace {
std::string s(const Expr &E) { return llvm::formatv("{0}", E).str(); }
std::string sp(const Expr &E) { return llvm::formatv("{0:2}", E).str(); }
TEST(JSONExprTests, Types) {
EXPECT_EQ("true", s(true));
EXPECT_EQ("null", s(nullptr));
EXPECT_EQ("2.5", s(2.5));
EXPECT_EQ(R"("foo")", s("foo"));
EXPECT_EQ("[1,2,3]", s({1, 2, 3}));
EXPECT_EQ(R"({"x":10,"y":20})", s(obj{{"x", 10}, {"y", 20}}));
}
TEST(JSONExprTests, Constructors) {
// Lots of edge cases around empty and singleton init lists.
EXPECT_EQ("[[[3]]]", s({{{3}}}));
EXPECT_EQ("[[[]]]", s({{{}}}));
EXPECT_EQ("[[{}]]", s({{obj{}}}));
EXPECT_EQ(R"({"A":{"B":{}}})", s(obj{{"A", obj{{"B", obj{}}}}}));
EXPECT_EQ(R"({"A":{"B":{"X":"Y"}}})",
s(obj{{"A", obj{{"B", obj{{"X", "Y"}}}}}}));
}
TEST(JSONExprTests, StringOwnership) {
char X[] = "Hello";
Expr Alias = static_cast<const char *>(X);
X[1] = 'a';
EXPECT_EQ(R"("Hallo")", s(Alias));
std::string Y = "Hello";
Expr Copy = Y;
Y[1] = 'a';
EXPECT_EQ(R"("Hello")", s(Copy));
}
TEST(JSONExprTests, CanonicalOutput) {
// Objects are sorted (but arrays aren't)!
EXPECT_EQ(R"({"a":1,"b":2,"c":3})", s(obj{{"a", 1}, {"c", 3}, {"b", 2}}));
EXPECT_EQ(R"(["a","c","b"])", s({"a", "c", "b"}));
EXPECT_EQ("3", s(3.0));
}
TEST(JSONExprTests, Escaping) {
std::string test = {
0, // Strings may contain nulls.
'\b', '\f', // Have mnemonics, but we escape numerically.
'\r', '\n', '\t', // Escaped with mnemonics.
'S', '\"', '\\', // Printable ASCII characters.
'\x7f', // Delete is not escaped.
'\xce', '\x94', // Non-ASCII UTF-8 is not escaped.
};
std::string teststring = R"("\u0000\u0008\u000c\r\n\tS\"\\)"
"\x7f\xCE\x94\"";
EXPECT_EQ(teststring, s(test));
EXPECT_EQ(R"({"object keys are\nescaped":true})",
s(obj{{"object keys are\nescaped", true}}));
}
TEST(JSONExprTests, PrettyPrinting) {
const char str[] = R"({
"empty_array": [],
"empty_object": {},
"full_array": [
1,
null
],
"full_object": {
"nested_array": [
{
"property": "value"
}
]
}
})";
EXPECT_EQ(str, sp(obj{
{"empty_object", obj{}},
{"empty_array", {}},
{"full_array", {1, nullptr}},
{"full_object",
obj{
{"nested_array",
{obj{
{"property", "value"},
}}},
}},
}));
}
TEST(JSONTest, Parse) {
auto Compare = [](llvm::StringRef S, Expr Expected) {
if (auto E = parse(S)) {
// Compare both string forms and with operator==, in case we have bugs.
EXPECT_EQ(*E, Expected);
EXPECT_EQ(sp(*E), sp(Expected));
} else {
handleAllErrors(E.takeError(), [S](const llvm::ErrorInfoBase &E) {
FAIL() << "Failed to parse JSON >>> " << S << " <<<: " << E.message();
});
}
};
Compare(R"(true)", true);
Compare(R"(false)", false);
Compare(R"(null)", nullptr);
Compare(R"(42)", 42);
Compare(R"(2.5)", 2.5);
Compare(R"(2e50)", 2e50);
Compare(R"(1.2e3456789)", 1.0 / 0.0);
Compare(R"("foo")", "foo");
Compare(R"("\"\\\b\f\n\r\t")", "\"\\\b\f\n\r\t");
Compare(R"("\u0000")", llvm::StringRef("\0", 1));
Compare("\"\x7f\"", "\x7f");
Compare(R"("\ud801\udc37")", u8"\U00010437"); // UTF16 surrogate pair escape.
Compare("\"\xE2\x82\xAC\xF0\x9D\x84\x9E\"", u8"\u20ac\U0001d11e"); // UTF8
Compare(
R"("LoneLeading=\ud801, LoneTrailing=\udc01, LeadingLeadingTrailing=\ud801\ud801\udc37")",
u8"LoneLeading=\ufffd, LoneTrailing=\ufffd, "
u8"LeadingLeadingTrailing=\ufffd\U00010437"); // Invalid unicode.
Compare(R"({"":0,"":0})", obj{{"", 0}});
Compare(R"({"obj":{},"arr":[]})", obj{{"obj", obj{}}, {"arr", {}}});
Compare(R"({"\n":{"\u0000":[[[[]]]]}})",
obj{{"\n", obj{
{llvm::StringRef("\0", 1), {{{{}}}}},
}}});
Compare("\r[\n\t] ", {});
}
TEST(JSONTest, ParseErrors) {
auto ExpectErr = [](llvm::StringRef Msg, llvm::StringRef S) {
if (auto E = parse(S)) {
// Compare both string forms and with operator==, in case we have bugs.
FAIL() << "Parsed JSON >>> " << S << " <<< but wanted error: " << Msg;
} else {
handleAllErrors(E.takeError(), [S, Msg](const llvm::ErrorInfoBase &E) {
EXPECT_THAT(E.message(), testing::HasSubstr(Msg)) << S;
});
}
};
ExpectErr("Unexpected EOF", "");
ExpectErr("Unexpected EOF", "[");
ExpectErr("Text after end of document", "[][]");
ExpectErr("Text after end of document", "[][]");
ExpectErr("Invalid bareword", "fuzzy");
ExpectErr("Expected , or ]", "[2?]");
ExpectErr("Expected object key", "{a:2}");
ExpectErr("Expected : after object key", R"({"a",2})");
ExpectErr("Expected , or } after object property", R"({"a":2 "b":3})");
ExpectErr("Expected JSON value", R"([&%!])");
ExpectErr("Invalid number", "1e1.0");
ExpectErr("Unterminated string", R"("abc\"def)");
ExpectErr("Control character in string", "\"abc\ndef\"");
ExpectErr("Invalid escape sequence", R"("\030")");
ExpectErr("Invalid \\u escape sequence", R"("\usuck")");
ExpectErr("[3:3, byte=19]", R"({
"valid": 1,
invalid: 2
})");
}
} // namespace
} // namespace json
} // namespace clangd
} // namespace clang
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