gecko/mfbt/tests/TestJSONWriter.cpp

420 lines
9.3 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Assertions.h"
#include "mozilla/JSONWriter.h"
#include "mozilla/UniquePtr.h"
#include <stdio.h>
#include <string.h>
using mozilla::JSONWriteFunc;
using mozilla::JSONWriter;
using mozilla::MakeUnique;
// This writes all the output into a big buffer.
struct StringWriteFunc : public JSONWriteFunc
{
const static size_t kLen = 100000;
char mBuf[kLen];
char* mPtr;
StringWriteFunc() : mPtr(mBuf) {}
void Write(const char* aStr)
{
char* last = mPtr + strlen(aStr); // where the nul will be added
// If you change this test and this assertion fails, just make kLen bigger.
MOZ_RELEASE_ASSERT(last < mBuf + kLen);
sprintf(mPtr, "%s", aStr);
mPtr = last;
}
};
void Check(JSONWriteFunc* aFunc, const char* aExpected)
{
const char* actual = static_cast<StringWriteFunc*>(aFunc)->mBuf;
if (strcmp(aExpected, actual) != 0) {
fprintf(stderr,
"---- EXPECTED ----\n<<<%s>>>\n"
"---- ACTUAL ----\n<<<%s>>>\n",
aExpected, actual);
MOZ_RELEASE_ASSERT(false, "expected and actual output don't match");
}
}
// Note: to convert actual output into |expected| strings that C++ can handle,
// apply the following substitutions, in order, to each line.
// - s/\\/\\\\/g # escapes backslashes
// - s/"/\\"/g # escapes quotes
// - s/$/\\n\\/ # adds a newline and string continuation char to each line
void TestBasicProperties()
{
const char* expected = "\
{\n\
\"null\": null,\n\
\"bool1\": true,\n\
\"bool2\": false,\n\
\"int1\": 123,\n\
\"int2\": -123,\n\
\"int3\": -123456789000,\n\
\"double1\": 1.2345,\n\
\"double2\": -3,\n\
\"double3\": 1e-7,\n\
\"double4\": 1.1111111111111111e+21,\n\
\"string1\": \"\",\n\
\"string2\": \"1234\",\n\
\"string3\": \"hello\",\n\
\"string4\": \"\\\" \\\\ \\u0007 \\b \\t \\n \\u000b \\f \\r\",\n\
\"ptr1\": \"0x0\",\n\
\"ptr2\": \"0xdeadbeef\",\n\
\"ptr3\": \"0xfacade\",\n\
\"len 0 array\": [\n\
],\n\
\"len 1 array\": [\n\
1\n\
],\n\
\"len 5 array\": [\n\
1,\n\
2,\n\
3,\n\
4,\n\
5\n\
],\n\
\"len 0 object\": {\n\
},\n\
\"len 1 object\": {\n\
\"one\": 1\n\
},\n\
\"len 5 object\": {\n\
\"one\": 1,\n\
\"two\": 2,\n\
\"three\": 3,\n\
\"four\": 4,\n\
\"five\": 5\n\
}\n\
}\n\
";
JSONWriter w(MakeUnique<StringWriteFunc>());
w.Start();
{
w.NullProperty("null");
w.BoolProperty("bool1", true);
w.BoolProperty("bool2", false);
w.IntProperty("int1", 123);
w.IntProperty("int2", -0x7b);
w.IntProperty("int3", -123456789000ll);
w.DoubleProperty("double1", 1.2345);
w.DoubleProperty("double2", -3);
w.DoubleProperty("double3", 1e-7);
w.DoubleProperty("double4", 1.1111111111111111e+21);
w.StringProperty("string1", "");
w.StringProperty("string2", "1234");
w.StringProperty("string3", "hello");
w.StringProperty("string4", "\" \\ \a \b \t \n \v \f \r");
w.PointerProperty("ptr1", (void*)0x0);
w.PointerProperty("ptr2", (void*)0xdeadbeef);
w.PointerProperty("ptr3", (void*)0xFaCaDe);
w.StartArrayProperty("len 0 array");
w.EndArray();
w.StartArrayProperty("len 1 array");
{
w.IntElement(1);
}
w.EndArray();
w.StartArrayProperty("len 5 array");
{
w.IntElement(1);
w.IntElement(2);
w.IntElement(3);
w.IntElement(4);
w.IntElement(5);
}
w.EndArray();
w.StartObjectProperty("len 0 object");
w.EndObject();
w.StartObjectProperty("len 1 object");
{
w.IntProperty("one", 1);
}
w.EndObject();
w.StartObjectProperty("len 5 object");
{
w.IntProperty("one", 1);
w.IntProperty("two", 2);
w.IntProperty("three", 3);
w.IntProperty("four", 4);
w.IntProperty("five", 5);
}
w.EndObject();
}
w.End();
Check(w.WriteFunc(), expected);
}
void TestBasicElements()
{
const char* expected = "\
{\n\
\"array\": [\n\
null,\n\
true,\n\
false,\n\
123,\n\
-123,\n\
-123456789000,\n\
1.2345,\n\
-3,\n\
1e-7,\n\
1.1111111111111111e+21,\n\
\"\",\n\
\"1234\",\n\
\"hello\",\n\
\"\\\" \\\\ \\u0007 \\b \\t \\n \\u000b \\f \\r\",\n\
\"0x0\",\n\
\"0xdeadbeef\",\n\
\"0xfacade\",\n\
[\n\
],\n\
[\n\
1\n\
],\n\
[\n\
1,\n\
2,\n\
3,\n\
4,\n\
5\n\
],\n\
{\n\
},\n\
{\n\
\"one\": 1\n\
},\n\
{\n\
\"one\": 1,\n\
\"two\": 2,\n\
\"three\": 3,\n\
\"four\": 4,\n\
\"five\": 5\n\
}\n\
]\n\
}\n\
";
JSONWriter w(MakeUnique<StringWriteFunc>());
w.Start();
w.StartArrayProperty("array");
{
w.NullElement();
w.BoolElement(true);
w.BoolElement(false);
w.IntElement(123);
w.IntElement(-0x7b);
w.IntElement(-123456789000ll);
w.DoubleElement(1.2345);
w.DoubleElement(-3);
w.DoubleElement(1e-7);
w.DoubleElement(1.1111111111111111e+21);
w.StringElement("");
w.StringElement("1234");
w.StringElement("hello");
w.StringElement("\" \\ \a \b \t \n \v \f \r");
w.PointerElement((void*)0x0);
w.PointerElement((void*)0xdeadbeef);
w.PointerElement((void*)0xFaCaDe);
w.StartArrayElement();
w.EndArray();
w.StartArrayElement();
{
w.IntElement(1);
}
w.EndArray();
w.StartArrayElement();
{
w.IntElement(1);
w.IntElement(2);
w.IntElement(3);
w.IntElement(4);
w.IntElement(5);
}
w.EndArray();
w.StartObjectElement();
w.EndObject();
w.StartObjectElement();
{
w.IntProperty("one", 1);
}
w.EndObject();
w.StartObjectElement();
{
w.IntProperty("one", 1);
w.IntProperty("two", 2);
w.IntProperty("three", 3);
w.IntProperty("four", 4);
w.IntProperty("five", 5);
}
w.EndObject();
}
w.EndArray();
w.End();
Check(w.WriteFunc(), expected);
}
void TestStringEscaping()
{
// This test uses hexadecimal character escapes because UTF8 literals cause
// problems for some compilers (see bug 1069726).
const char* expected = "\
{\n\
\"ascii\": \"\x7F~}|{zyxwvutsrqponmlkjihgfedcba`_^]\\\\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$#\\\"! \\u001f\\u001e\\u001d\\u001c\\u001b\\u001a\\u0019\\u0018\\u0017\\u0016\\u0015\\u0014\\u0013\\u0012\\u0011\\u0010\\u000f\\u000e\\r\\f\\u000b\\n\\t\\b\\u0007\\u0006\\u0005\\u0004\\u0003\\u0002\\u0001\",\n\
\"\xD9\x85\xD8\xB1\xD8\xAD\xD8\xA8\xD8\xA7 \xD9\x87\xD9\x86\xD8\xA7\xD9\x83\": true,\n\
\"\xD5\xA2\xD5\xA1\xD6\x80\xD5\xA5\xD6\x82 \xD5\xB9\xD5\xAF\xD5\xA1\": -123,\n\
\"\xE4\xBD\xA0\xE5\xA5\xBD\": 1.234,\n\
\"\xCE\xB3\xCE\xB5\xCE\xB9\xCE\xB1 \xCE\xB5\xCE\xBA\xCE\xB5\xCE\xAF\": \"\xD8\xB3\xD9\x84\xD8\xA7\xD9\x85\",\n\
\"hall\xC3\xB3 \xC3\xBE" "arna\": \"0x1234\",\n\
\"\xE3\x81\x93\xE3\x82\x93\xE3\x81\xAB\xE3\x81\xA1\xE3\x81\xAF\": {\n\
\"\xD0\xBF\xD1\x80\xD0\xB8\xD0\xB2\xD0\xB5\xD1\x82\": [\n\
]\n\
}\n\
}\n\
";
JSONWriter w(MakeUnique<StringWriteFunc>());
// Test the string escaping behaviour.
w.Start();
{
// Test all 127 ascii values. Do it in reverse order so that the 0
// at the end serves as the null char.
char buf[128];
for (int i = 0; i < 128; i++) {
buf[i] = 127 - i;
}
w.StringProperty("ascii", buf);
// Test lots of unicode stuff. Note that this file is encoded as UTF-8.
w.BoolProperty("\xD9\x85\xD8\xB1\xD8\xAD\xD8\xA8\xD8\xA7 \xD9\x87\xD9\x86\xD8\xA7\xD9\x83", true);
w.IntProperty("\xD5\xA2\xD5\xA1\xD6\x80\xD5\xA5\xD6\x82 \xD5\xB9\xD5\xAF\xD5\xA1", -123);
w.DoubleProperty("\xE4\xBD\xA0\xE5\xA5\xBD", 1.234);
w.StringProperty("\xCE\xB3\xCE\xB5\xCE\xB9\xCE\xB1 \xCE\xB5\xCE\xBA\xCE\xB5\xCE\xAF", "\xD8\xB3\xD9\x84\xD8\xA7\xD9\x85");
w.PointerProperty("hall\xC3\xB3 \xC3\xBE" "arna", (void*)0x1234);
w.StartObjectProperty("\xE3\x81\x93\xE3\x82\x93\xE3\x81\xAB\xE3\x81\xA1\xE3\x81\xAF");
{
w.StartArrayProperty("\xD0\xBF\xD1\x80\xD0\xB8\xD0\xB2\xD0\xB5\xD1\x82");
w.EndArray();
}
w.EndObject();
}
w.End();
Check(w.WriteFunc(), expected);
}
void TestDeepNesting()
{
const char* expected = "\
{\n\
\"a\": [\n\
{\n\
\"a\": [\n\
{\n\
\"a\": [\n\
{\n\
\"a\": [\n\
{\n\
\"a\": [\n\
{\n\
\"a\": [\n\
{\n\
\"a\": [\n\
{\n\
\"a\": [\n\
{\n\
\"a\": [\n\
{\n\
\"a\": [\n\
{\n\
}\n\
]\n\
}\n\
]\n\
}\n\
]\n\
}\n\
]\n\
}\n\
]\n\
}\n\
]\n\
}\n\
]\n\
}\n\
]\n\
}\n\
]\n\
}\n\
]\n\
}\n\
";
JSONWriter w(MakeUnique<StringWriteFunc>());
w.Start();
{
static const int n = 10;
for (int i = 0; i < n; i++) {
w.StartArrayProperty("a");
w.StartObjectElement();
}
for (int i = 0; i < n; i++) {
w.EndObject();
w.EndArray();
}
}
w.End();
Check(w.WriteFunc(), expected);
}
int main(void)
{
TestBasicProperties();
TestBasicElements();
TestStringEscaping();
TestDeepNesting();
return 0;
}