forked from OSchip/llvm-project
455 lines
14 KiB
C++
455 lines
14 KiB
C++
//===-- JSONTest.cpp - JSON unit tests --------------------------*- C++ -*-===//
|
||
//
|
||
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
// See https://llvm.org/LICENSE.txt for license information.
|
||
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
//
|
||
//===----------------------------------------------------------------------===//
|
||
|
||
#include "llvm/Support/JSON.h"
|
||
#include "llvm/Support/raw_ostream.h"
|
||
|
||
#include "gmock/gmock.h"
|
||
#include "gtest/gtest.h"
|
||
|
||
namespace llvm {
|
||
namespace json {
|
||
|
||
namespace {
|
||
|
||
std::string s(const Value &E) { return llvm::formatv("{0}", E).str(); }
|
||
std::string sp(const Value &E) { return llvm::formatv("{0:2}", E).str(); }
|
||
|
||
TEST(JSONTest, 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(Object{{"x", 10}, {"y", 20}}));
|
||
|
||
#ifdef NDEBUG
|
||
EXPECT_EQ(R"("<EFBFBD><EFBFBD>")", s("\xC0\x80"));
|
||
EXPECT_EQ(R"({"<EFBFBD><EFBFBD>":0})", s(Object{{"\xC0\x80", 0}}));
|
||
#else
|
||
EXPECT_DEATH(s("\xC0\x80"), "Invalid UTF-8");
|
||
EXPECT_DEATH(s(Object{{"\xC0\x80", 0}}), "Invalid UTF-8");
|
||
#endif
|
||
}
|
||
|
||
TEST(JSONTest, Constructors) {
|
||
// Lots of edge cases around empty and singleton init lists.
|
||
EXPECT_EQ("[[[3]]]", s({{{3}}}));
|
||
EXPECT_EQ("[[[]]]", s({{{}}}));
|
||
EXPECT_EQ("[[{}]]", s({{Object{}}}));
|
||
EXPECT_EQ(R"({"A":{"B":{}}})", s(Object{{"A", Object{{"B", Object{}}}}}));
|
||
EXPECT_EQ(R"({"A":{"B":{"X":"Y"}}})",
|
||
s(Object{{"A", Object{{"B", Object{{"X", "Y"}}}}}}));
|
||
EXPECT_EQ("null", s(llvm::Optional<double>()));
|
||
EXPECT_EQ("2.5", s(llvm::Optional<double>(2.5)));
|
||
EXPECT_EQ("[[2.5,null]]", s(std::vector<std::vector<llvm::Optional<double>>>{
|
||
{2.5, llvm::None}}));
|
||
}
|
||
|
||
TEST(JSONTest, StringOwnership) {
|
||
char X[] = "Hello";
|
||
Value Alias = static_cast<const char *>(X);
|
||
X[1] = 'a';
|
||
EXPECT_EQ(R"("Hallo")", s(Alias));
|
||
|
||
std::string Y = "Hello";
|
||
Value Copy = Y;
|
||
Y[1] = 'a';
|
||
EXPECT_EQ(R"("Hello")", s(Copy));
|
||
}
|
||
|
||
TEST(JSONTest, CanonicalOutput) {
|
||
// Objects are sorted (but arrays aren't)!
|
||
EXPECT_EQ(R"({"a":1,"b":2,"c":3})", s(Object{{"a", 1}, {"c", 3}, {"b", 2}}));
|
||
EXPECT_EQ(R"(["a","c","b"])", s({"a", "c", "b"}));
|
||
EXPECT_EQ("3", s(3.0));
|
||
}
|
||
|
||
TEST(JSONTest, 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(Object{{"object keys are\nescaped", true}}));
|
||
}
|
||
|
||
TEST(JSONTest, PrettyPrinting) {
|
||
const char Str[] = R"({
|
||
"empty_array": [],
|
||
"empty_object": {},
|
||
"full_array": [
|
||
1,
|
||
null
|
||
],
|
||
"full_object": {
|
||
"nested_array": [
|
||
{
|
||
"property": "value"
|
||
}
|
||
]
|
||
}
|
||
})";
|
||
|
||
EXPECT_EQ(Str, sp(Object{
|
||
{"empty_object", Object{}},
|
||
{"empty_array", {}},
|
||
{"full_array", {1, nullptr}},
|
||
{"full_object",
|
||
Object{
|
||
{"nested_array",
|
||
{Object{
|
||
{"property", "value"},
|
||
}}},
|
||
}},
|
||
}));
|
||
}
|
||
|
||
TEST(JSONTest, Array) {
|
||
Array A{1, 2};
|
||
A.emplace_back(3);
|
||
A.emplace(++A.begin(), 0);
|
||
A.push_back(4);
|
||
A.insert(++++A.begin(), 99);
|
||
|
||
EXPECT_EQ(A.size(), 6u);
|
||
EXPECT_EQ(R"([1,0,99,2,3,4])", s(std::move(A)));
|
||
}
|
||
|
||
TEST(JSONTest, Object) {
|
||
Object O{{"a", 1}, {"b", 2}, {"c", 3}};
|
||
EXPECT_TRUE(O.try_emplace("d", 4).second);
|
||
EXPECT_FALSE(O.try_emplace("a", 4).second);
|
||
|
||
auto D = O.find("d");
|
||
EXPECT_FALSE(D == O.end());
|
||
auto E = O.find("e");
|
||
EXPECT_TRUE(E == O.end());
|
||
|
||
O.erase("b");
|
||
O.erase(D);
|
||
EXPECT_EQ(O.size(), 2u);
|
||
EXPECT_EQ(R"({"a":1,"c":3})", s(std::move(O)));
|
||
}
|
||
|
||
TEST(JSONTest, Parse) {
|
||
auto Compare = [](llvm::StringRef S, Value 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)", std::numeric_limits<double>::infinity());
|
||
|
||
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})", Object{{"", 0}});
|
||
Compare(R"({"obj":{},"arr":[]})", Object{{"obj", Object{}}, {"arr", {}}});
|
||
Compare(R"({"\n":{"\u0000":[[[[]]]]}})",
|
||
Object{{"\n", Object{
|
||
{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(std::string(Msg))) << S;
|
||
});
|
||
}
|
||
};
|
||
ExpectErr("Unexpected EOF", "");
|
||
ExpectErr("Unexpected EOF", "[");
|
||
ExpectErr("Text after end of document", "[][]");
|
||
ExpectErr("Invalid JSON value (false?)", "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("Invalid JSON value", R"([&%!])");
|
||
ExpectErr("Invalid JSON value (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
|
||
})");
|
||
ExpectErr("Invalid UTF-8 sequence", "\"\xC0\x80\""); // WTF-8 null
|
||
}
|
||
|
||
// Direct tests of isUTF8 and fixUTF8. Internal uses are also tested elsewhere.
|
||
TEST(JSONTest, UTF8) {
|
||
for (const char *Valid : {
|
||
"this is ASCII text",
|
||
"thïs tëxt häs BMP chäräctërs",
|
||
"𐌶𐌰L𐌾𐍈 C𐍈𐌼𐌴𐍃",
|
||
}) {
|
||
EXPECT_TRUE(isUTF8(Valid)) << Valid;
|
||
EXPECT_EQ(fixUTF8(Valid), Valid);
|
||
}
|
||
for (auto Invalid : std::vector<std::pair<const char *, const char *>>{
|
||
{"lone trailing \x81\x82 bytes", "lone trailing <20><> bytes"},
|
||
{"missing trailing \xD0 bytes", "missing trailing <20> bytes"},
|
||
{"truncated character \xD0", "truncated character <20>"},
|
||
{"not \xC1\x80 the \xE0\x9f\xBF shortest \xF0\x83\x83\x83 encoding",
|
||
"not <20><> the <20><><EFBFBD> shortest <20><><EFBFBD><EFBFBD> encoding"},
|
||
{"too \xF9\x80\x80\x80\x80 long", "too <20><><EFBFBD><EFBFBD><EFBFBD> long"},
|
||
{"surrogate \xED\xA0\x80 invalid \xF4\x90\x80\x80",
|
||
"surrogate <20><><EFBFBD> invalid <20><><EFBFBD><EFBFBD>"}}) {
|
||
EXPECT_FALSE(isUTF8(Invalid.first)) << Invalid.first;
|
||
EXPECT_EQ(fixUTF8(Invalid.first), Invalid.second);
|
||
}
|
||
}
|
||
|
||
TEST(JSONTest, Inspection) {
|
||
llvm::Expected<Value> Doc = parse(R"(
|
||
{
|
||
"null": null,
|
||
"boolean": false,
|
||
"number": 2.78,
|
||
"string": "json",
|
||
"array": [null, true, 3.14, "hello", [1,2,3], {"time": "arrow"}],
|
||
"object": {"fruit": "banana"}
|
||
}
|
||
)");
|
||
EXPECT_TRUE(!!Doc);
|
||
|
||
Object *O = Doc->getAsObject();
|
||
ASSERT_TRUE(O);
|
||
|
||
EXPECT_FALSE(O->getNull("missing"));
|
||
EXPECT_FALSE(O->getNull("boolean"));
|
||
EXPECT_TRUE(O->getNull("null"));
|
||
|
||
EXPECT_EQ(O->getNumber("number"), llvm::Optional<double>(2.78));
|
||
EXPECT_FALSE(O->getInteger("number"));
|
||
EXPECT_EQ(O->getString("string"), llvm::Optional<llvm::StringRef>("json"));
|
||
ASSERT_FALSE(O->getObject("missing"));
|
||
ASSERT_FALSE(O->getObject("array"));
|
||
ASSERT_TRUE(O->getObject("object"));
|
||
EXPECT_EQ(*O->getObject("object"), (Object{{"fruit", "banana"}}));
|
||
|
||
Array *A = O->getArray("array");
|
||
ASSERT_TRUE(A);
|
||
EXPECT_EQ((*A)[1].getAsBoolean(), llvm::Optional<bool>(true));
|
||
ASSERT_TRUE((*A)[4].getAsArray());
|
||
EXPECT_EQ(*(*A)[4].getAsArray(), (Array{1, 2, 3}));
|
||
EXPECT_EQ((*(*A)[4].getAsArray())[1].getAsInteger(),
|
||
llvm::Optional<int64_t>(2));
|
||
int I = 0;
|
||
for (Value &E : *A) {
|
||
if (I++ == 5) {
|
||
ASSERT_TRUE(E.getAsObject());
|
||
EXPECT_EQ(E.getAsObject()->getString("time"),
|
||
llvm::Optional<llvm::StringRef>("arrow"));
|
||
} else
|
||
EXPECT_FALSE(E.getAsObject());
|
||
}
|
||
}
|
||
|
||
// Verify special integer handling - we try to preserve exact int64 values.
|
||
TEST(JSONTest, Integers) {
|
||
struct {
|
||
const char *Desc;
|
||
Value Val;
|
||
const char *Str;
|
||
llvm::Optional<int64_t> AsInt;
|
||
llvm::Optional<double> AsNumber;
|
||
} TestCases[] = {
|
||
{
|
||
"Non-integer. Stored as double, not convertible.",
|
||
double{1.5},
|
||
"1.5",
|
||
llvm::None,
|
||
1.5,
|
||
},
|
||
|
||
{
|
||
"Integer, not exact double. Stored as int64, convertible.",
|
||
int64_t{0x4000000000000001},
|
||
"4611686018427387905",
|
||
int64_t{0x4000000000000001},
|
||
double{0x4000000000000000},
|
||
},
|
||
|
||
{
|
||
"Negative integer, not exact double. Stored as int64, convertible.",
|
||
int64_t{-0x4000000000000001},
|
||
"-4611686018427387905",
|
||
int64_t{-0x4000000000000001},
|
||
double{-0x4000000000000000},
|
||
},
|
||
|
||
{
|
||
"Dynamically exact integer. Stored as double, convertible.",
|
||
double{0x6000000000000000},
|
||
"6.9175290276410819e+18",
|
||
int64_t{0x6000000000000000},
|
||
double{0x6000000000000000},
|
||
},
|
||
|
||
{
|
||
"Dynamically integer, >64 bits. Stored as double, not convertible.",
|
||
1.5 * double{0x8000000000000000},
|
||
"1.3835058055282164e+19",
|
||
llvm::None,
|
||
1.5 * double{0x8000000000000000},
|
||
},
|
||
};
|
||
for (const auto &T : TestCases) {
|
||
EXPECT_EQ(T.Str, s(T.Val)) << T.Desc;
|
||
llvm::Expected<Value> Doc = parse(T.Str);
|
||
EXPECT_TRUE(!!Doc) << T.Desc;
|
||
EXPECT_EQ(Doc->getAsInteger(), T.AsInt) << T.Desc;
|
||
EXPECT_EQ(Doc->getAsNumber(), T.AsNumber) << T.Desc;
|
||
EXPECT_EQ(T.Val, *Doc) << T.Desc;
|
||
EXPECT_EQ(T.Str, s(*Doc)) << T.Desc;
|
||
}
|
||
}
|
||
|
||
// Sample struct with typical JSON-mapping rules.
|
||
struct CustomStruct {
|
||
CustomStruct() : B(false) {}
|
||
CustomStruct(std::string S, llvm::Optional<int> I, bool B)
|
||
: S(S), I(I), B(B) {}
|
||
std::string S;
|
||
llvm::Optional<int> I;
|
||
bool B;
|
||
};
|
||
inline bool operator==(const CustomStruct &L, const CustomStruct &R) {
|
||
return L.S == R.S && L.I == R.I && L.B == R.B;
|
||
}
|
||
inline llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
|
||
const CustomStruct &S) {
|
||
return OS << "(" << S.S << ", " << (S.I ? std::to_string(*S.I) : "None")
|
||
<< ", " << S.B << ")";
|
||
}
|
||
bool fromJSON(const Value &E, CustomStruct &R) {
|
||
ObjectMapper O(E);
|
||
if (!O || !O.map("str", R.S) || !O.map("int", R.I))
|
||
return false;
|
||
O.map("bool", R.B);
|
||
return true;
|
||
}
|
||
|
||
TEST(JSONTest, Deserialize) {
|
||
std::map<std::string, std::vector<CustomStruct>> R;
|
||
CustomStruct ExpectedStruct = {"foo", 42, true};
|
||
std::map<std::string, std::vector<CustomStruct>> Expected;
|
||
Value J = Object{
|
||
{"foo",
|
||
Array{
|
||
Object{
|
||
{"str", "foo"},
|
||
{"int", 42},
|
||
{"bool", true},
|
||
{"unknown", "ignored"},
|
||
},
|
||
Object{{"str", "bar"}},
|
||
Object{
|
||
{"str", "baz"}, {"bool", "string"}, // OK, deserialize ignores.
|
||
},
|
||
}}};
|
||
Expected["foo"] = {
|
||
CustomStruct("foo", 42, true),
|
||
CustomStruct("bar", llvm::None, false),
|
||
CustomStruct("baz", llvm::None, false),
|
||
};
|
||
ASSERT_TRUE(fromJSON(J, R));
|
||
EXPECT_EQ(R, Expected);
|
||
|
||
CustomStruct V;
|
||
EXPECT_FALSE(fromJSON(nullptr, V)) << "Not an object " << V;
|
||
EXPECT_FALSE(fromJSON(Object{}, V)) << "Missing required field " << V;
|
||
EXPECT_FALSE(fromJSON(Object{{"str", 1}}, V)) << "Wrong type " << V;
|
||
// Optional<T> must parse as the correct type if present.
|
||
EXPECT_FALSE(fromJSON(Object{{"str", 1}, {"int", "string"}}, V))
|
||
<< "Wrong type for Optional<T> " << V;
|
||
}
|
||
|
||
TEST(JSONTest, Stream) {
|
||
auto StreamStuff = [](unsigned Indent) {
|
||
std::string S;
|
||
llvm::raw_string_ostream OS(S);
|
||
OStream J(OS, Indent);
|
||
J.object([&] {
|
||
J.attributeArray("foo", [&] {
|
||
J.value(nullptr);
|
||
J.value(42.5);
|
||
J.arrayBegin();
|
||
J.value(43);
|
||
J.arrayEnd();
|
||
});
|
||
J.attributeBegin("bar");
|
||
J.objectBegin();
|
||
J.objectEnd();
|
||
J.attributeEnd();
|
||
J.attribute("baz", "xyz");
|
||
});
|
||
return OS.str();
|
||
};
|
||
|
||
const char *Plain = R"({"foo":[null,42.5,[43]],"bar":{},"baz":"xyz"})";
|
||
EXPECT_EQ(Plain, StreamStuff(0));
|
||
const char *Pretty = R"({
|
||
"foo": [
|
||
null,
|
||
42.5,
|
||
[
|
||
43
|
||
]
|
||
],
|
||
"bar": {},
|
||
"baz": "xyz"
|
||
})";
|
||
EXPECT_EQ(Pretty, StreamStuff(2));
|
||
}
|
||
|
||
} // namespace
|
||
} // namespace json
|
||
} // namespace llvm
|