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#include <memory>
#include <gtest/gtest.h>
#include <valijson/internal/json_pointer.hpp>
#include <valijson/adapters/rapidjson_adapter.hpp>
using valijson::adapters::RapidJsonAdapter;
using valijson::internal::json_pointer::resolveJsonPointer;
typedef rapidjson::MemoryPoolAllocator<rapidjson::CrtAllocator> RapidJsonCrtAllocator;
class TestJsonPointer : public testing::Test
{
};
struct JsonPointerTestCase
{
/// Description of test case
std::string description;
/// Document to traverse when resolving the JSON Pointer
rapidjson::Value value;
/// JSON Pointer that should guide traversal of the document
std::string jsonPointer;
/// Optional reference to the expected result from the original document
rapidjson::Value *expectedValue;
};
std::vector<std::shared_ptr<JsonPointerTestCase> >
testCasesForSingleLevelObjectPointers(
RapidJsonCrtAllocator &allocator)
{
typedef std::shared_ptr<JsonPointerTestCase> TestCase;
std::vector<TestCase> testCases;
TestCase testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolving '#' should cause an exception to be thrown";
testCase->value.SetNull();
testCase->jsonPointer = "#";
testCase->expectedValue = nullptr;
testCases.push_back(testCase);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolving an empty string should return the root node";
testCase->value.SetNull();
testCase->jsonPointer = "";
testCase->expectedValue = &testCase->value;
testCases.push_back(testCase);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolving '/' should return the root node";
testCase->value.SetNull();
testCase->jsonPointer = "/";
testCase->expectedValue = &testCase->value;
testCases.push_back(testCase);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolving '//' should return the root node";
testCase->value.SetNull();
testCase->jsonPointer = "//";
testCase->expectedValue = &testCase->value;
testCases.push_back(testCase);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolve '/test' in object containing one member named 'test'";
testCase->value.SetObject();
testCase->value.AddMember("test", "test", allocator);
testCase->jsonPointer = "/test";
testCase->expectedValue = &testCase->value.FindMember("test")->value;
testCases.push_back(testCase);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolve '/test/' in object containing one member named 'test'";
testCase->value.SetObject();
testCase->value.AddMember("test", "test", allocator);
testCase->jsonPointer = "/test/";
testCase->expectedValue = &testCase->value.FindMember("test")->value;
testCases.push_back(testCase);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolve '//test//' in object containing one member named 'test'";
testCase->value.SetObject();
testCase->value.AddMember("test", "test", allocator);
testCase->jsonPointer = "//test//";
testCase->expectedValue = &testCase->value.FindMember("test")->value;
testCases.push_back(testCase);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolve '/missing' in object containing one member name 'test'";
testCase->value.SetObject();
testCase->value.AddMember("test", "test", allocator);
testCase->jsonPointer = "/missing";
testCase->expectedValue = nullptr;
testCases.push_back(testCase);
{
rapidjson::Value nonemptyString;
nonemptyString.SetString("hello, world");
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolve '/value/foo' fails because 'value' is not an object (but a non empty string)";
testCase->value.SetObject();
testCase->value.AddMember("value", nonemptyString, allocator);
testCase->jsonPointer = "/value/bar";
testCase->expectedValue = &testCase->value;
testCase->expectedValue = nullptr;
testCases.push_back(testCase);
}
{
rapidjson::Value emptyString;
emptyString.SetString("");
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolve '/empty/after_empty' fails because 'empty' is an empty string";
testCase->value.SetObject();
testCase->value.AddMember("empty", emptyString, allocator);
testCase->jsonPointer = "/empty/after_empty";
testCase->expectedValue = nullptr;
testCases.push_back(testCase);
}
{
rapidjson::Value testArray;
testArray.SetArray();
testArray.PushBack("test0", allocator);
testArray.PushBack("test1", allocator);
testArray.PushBack("test2", allocator);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolve '/test/0' in object containing one member containing an array with 3 elements";
testCase->value.SetObject();
testCase->value.AddMember("test", testArray, allocator);
testCase->jsonPointer = "/test/0";
testCase->expectedValue = &testCase->value.FindMember("test")->value[rapidjson::SizeType(0)];
testCases.push_back(testCase);
}
{
rapidjson::Value testArray;
testArray.SetArray();
testArray.PushBack("test0", allocator);
testArray.PushBack("test1", allocator);
testArray.PushBack("test2", allocator);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolve '/test/1' in object containing one member containing an array with 3 elements";
testCase->value.SetObject();
testCase->value.AddMember("test", testArray, allocator);
testCase->jsonPointer = "/test/1";
testCase->expectedValue = &testCase->value.FindMember("test")->value[rapidjson::SizeType(1)];
testCases.push_back(testCase);
}
{
rapidjson::Value testArray;
testArray.SetArray();
testArray.PushBack("test0", allocator);
testArray.PushBack("test1", allocator);
testArray.PushBack("test2", allocator);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolve '/test/2' in object containing one member containing an array with 3 elements";
testCase->value.SetObject();
testCase->value.AddMember("test", testArray, allocator);
testCase->jsonPointer = "/test/2";
testCase->expectedValue = &testCase->value.FindMember("test")->value[rapidjson::SizeType(2)];
testCases.push_back(testCase);
}
{
rapidjson::Value testArray;
testArray.SetArray();
testArray.PushBack("test0", allocator);
testArray.PushBack("test1", allocator);
testArray.PushBack("test2", allocator);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolving '/test/3' in object containing one member containing "
"an array with 3 elements should throw an exception";
testCase->value.SetObject();
testCase->value.AddMember("test", testArray, allocator);
testCase->jsonPointer = "/test/3";
testCase->expectedValue = nullptr;
testCases.push_back(testCase);
}
//
// Allow the "-" character is not useful within the context of this library,
// there is an explicit check for it, so that a custom error message can
// be included in the exception that is thrown.
//
// From the JSON Pointer specification (RFC 6901, April 2013):
//
// Note that the use of the "-" character to index an array will always
// result in such an error condition because by definition it refers to
// a nonexistent array element. Thus, applications of JSON Pointer need
// to specify how that character is to be handled, if it is to be
// useful.
//
{
rapidjson::Value testArray;
testArray.SetArray();
testArray.PushBack("test0", allocator);
testArray.PushBack("test1", allocator);
testArray.PushBack("test2", allocator);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolving '/test/-' in object containing one member containing "
"an array with 3 elements should throw an exception";
testCase->value.SetNull();
testCase->jsonPointer = "/test/-";
testCase->expectedValue = nullptr;
testCases.push_back(testCase);
}
//
// The following tests ensure that escape sequences are handled correctly.
//
// From the JSON Pointer specification (RFC 6901, April 2013):
//
// Evaluation of each reference token begins by decoding any escaped
// character sequence. This is performed by first transforming any
// occurrence of the sequence '~1' to '/', and then transforming any
// occurrence of the sequence '~0' to '~'. By performing the
// substitutions in this order, an implementation avoids the error of
// turning '~01' first into '~1' and then into '/', which would be
// incorrect (the string '~01' correctly becomes '~1' after
// transformation).
//
{
rapidjson::Value value;
value.SetDouble(10.);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolving '/hello~1world' in object containing one member named "
"'hello/world' should return the associated value";
testCase->value.SetObject();
testCase->value.AddMember("hello/world", value, allocator);
testCase->jsonPointer = "/hello~1world";
testCase->expectedValue = &testCase->value.FindMember("hello/world")->value;
testCases.push_back(testCase);
}
{
rapidjson::Value value;
value.SetDouble(10.);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolving '/hello~0world' in object containing one member named "
"'hello~world' should return the associated value";
testCase->value.SetObject();
testCase->value.AddMember("hello~world", value, allocator);
testCase->jsonPointer = "/hello~0world";
testCase->expectedValue = &testCase->value.FindMember("hello~world")->value;
testCases.push_back(testCase);
}
{
rapidjson::Value value;
value.SetDouble(10.);
testCase = std::make_shared<JsonPointerTestCase>();
testCase->description = "Resolving '/hello~01world' in object containing one member named "
"'hello~1world' should return the associated value";
testCase->value.SetObject();
testCase->value.AddMember("hello~1world", value, allocator);
testCase->jsonPointer = "/hello~01world";
testCase->expectedValue = &testCase->value.FindMember("hello~1world")->value;
testCases.push_back(testCase);
}
return testCases;
}
TEST_F(TestJsonPointer, JsonPointerTestCases)
{
typedef std::vector<std::shared_ptr<JsonPointerTestCase> > TestCases;
// Ensure memory used for test cases is freed when test function completes
rapidjson::MemoryPoolAllocator<rapidjson::CrtAllocator> allocator;
TestCases testCases = testCasesForSingleLevelObjectPointers(allocator);
for (const auto & testCase : testCases) {
const std::string &jsonPointer = testCase->jsonPointer;
const RapidJsonAdapter valueAdapter(testCase->value);
if (testCase->expectedValue) {
const RapidJsonAdapter expectedAdapter(*(testCase->expectedValue));
const RapidJsonAdapter actualAdapter = resolveJsonPointer(valueAdapter, jsonPointer);
EXPECT_TRUE(actualAdapter.equalTo(expectedAdapter, true)) << testCase->description;
} else {
// Since the tests with throwing disabled will abort, we can't
// do anything here.
#if VALIJSON_USE_EXCEPTIONS
EXPECT_THROW(resolveJsonPointer(valueAdapter, jsonPointer), std::runtime_error) << testCase->description;
#endif
}
}
}
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