view ext/json11/test.cpp @ 186:52322dde68ea

Fix erroneous logic for handling step and block size in prior commit

The earlier change had a logical misconception. If PluginStub is
receiving the correct step and block size back from the configure call,
the plugin on the server side must have already been successfully
initialised, as the step and block size are only returned in a
successful configure response. This means the test for a failed
initialise and redo with the correct parameters must be done on the
server side (in LoaderRequests) not the client. The client has a more
complicated job, which is to notice that a *successful* configure had
returned different framing parameters from those passed to the
initialise call, and to pretend that it had actually failed until the
host called again with the correct parameters. We definitely need tests
for this!

#include <string>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <sstream>
#include "json11.hpp"
#include <cassert>
#include <list>
#include <set>
#include <unordered_map>

using namespace json11;
using std::string;

// Check that Json has the properties we want.
#include <type_traits>
#define CHECK_TRAIT(x) static_assert(std::x::value, #x)
CHECK_TRAIT(is_nothrow_constructible<Json>);
CHECK_TRAIT(is_nothrow_default_constructible<Json>);
CHECK_TRAIT(is_copy_constructible<Json>);
CHECK_TRAIT(is_nothrow_move_constructible<Json>);
CHECK_TRAIT(is_copy_assignable<Json>);
CHECK_TRAIT(is_nothrow_move_assignable<Json>);
CHECK_TRAIT(is_nothrow_destructible<Json>);

void parse_from_stdin() {
    string buf;
    string line;
    while (std::getline(std::cin, line)) {
        buf += line + "\n";
    }

    string err;
    auto json = Json::parse(buf, err);
    if (!err.empty()) {
        printf("Failed: %s\n", err.c_str());
    } else {
        printf("Result: %s\n", json.dump().c_str());
    }
}

int main(int argc, char **argv) {
    if (argc == 2 && argv[1] == string("--stdin")) {
        parse_from_stdin();
        return 0;
    }

    const string simple_test =
        R"({"k1":"v1", "k2":42, "k3":["a",123,true,false,null]})";

    string err;
    auto json = Json::parse(simple_test, err);

    std::cout << "k1: " << json["k1"].string_value() << "\n";
    std::cout << "k3: " << json["k3"].dump() << "\n";

    for (auto &k : json["k3"].array_items()) {
        std::cout << "    - " << k.dump() << "\n";
    }

    const string comment_test = R"({
      // comment /* with nested comment */
      "a": 1,
      // comment
      // continued
      "b": "text",
      /* multi
         line
         comment */
      // and single-line comment
      "c": [1, 2, 3]
    })";

    string err_comment;
    auto json_comment = Json::parse(
      comment_test, err_comment, JsonParse::COMMENTS);
    if (!err_comment.empty()) {
        printf("Failed: %s\n", err_comment.c_str());
    } else {
        printf("Result: %s\n", json_comment.dump().c_str());
    }

    string failing_comment_test = R"({
      /* bad comment
      "a": 1,
    })";

    string err_failing_comment;
    auto json_failing_comment = Json::parse(
      failing_comment_test, err_failing_comment, JsonParse::COMMENTS);
    if (!err_failing_comment.empty()) {
        printf("Failed: %s\n", err_failing_comment.c_str());
    } else {
        printf("Result: %s\n", json_failing_comment.dump().c_str());
    }

    failing_comment_test = R"({
      / / bad comment })";

    json_failing_comment = Json::parse(
      failing_comment_test, err_failing_comment, JsonParse::COMMENTS);
    if (!err_failing_comment.empty()) {
        printf("Failed: %s\n", err_failing_comment.c_str());
    } else {
        printf("Result: %s\n", json_failing_comment.dump().c_str());
    }

    failing_comment_test = R"({// bad comment })";

    json_failing_comment = Json::parse(
      failing_comment_test, err_failing_comment, JsonParse::COMMENTS);
    if (!err_failing_comment.empty()) {
        printf("Failed: %s\n", err_failing_comment.c_str());
    } else {
        printf("Result: %s\n", json_failing_comment.dump().c_str());
    }

    failing_comment_test = R"({
          "a": 1
        }/)";

    json_failing_comment = Json::parse(
      failing_comment_test, err_failing_comment, JsonParse::COMMENTS);
    if (!err_failing_comment.empty()) {
        printf("Failed: %s\n", err_failing_comment.c_str());
    } else {
        printf("Result: %s\n", json_failing_comment.dump().c_str());
    }

    failing_comment_test = R"({/* bad
                                  comment *})";

    json_failing_comment = Json::parse(
      failing_comment_test, err_failing_comment, JsonParse::COMMENTS);
    if (!err_failing_comment.empty()) {
        printf("Failed: %s\n", err_failing_comment.c_str());
    } else {
        printf("Result: %s\n", json_failing_comment.dump().c_str());
    }

    std::list<int> l1 { 1, 2, 3 };
    std::vector<int> l2 { 1, 2, 3 };
    std::set<int> l3 { 1, 2, 3 };
    assert(Json(l1) == Json(l2));
    assert(Json(l2) == Json(l3));

    std::map<string, string> m1 { { "k1", "v1" }, { "k2", "v2" } };
    std::unordered_map<string, string> m2 { { "k1", "v1" }, { "k2", "v2" } };
    assert(Json(m1) == Json(m2));

    // Json literals
    Json obj = Json::object({
        { "k1", "v1" },
        { "k2", 42.0 },
        { "k3", Json::array({ "a", 123.0, true, false, nullptr }) },
    });

    std::cout << "obj: " << obj.dump() << "\n";

    assert(Json("a").number_value() == 0);
    assert(Json("a").string_value() == "a");
    assert(Json().number_value() == 0);

    assert(obj == json);
    assert(Json(42) == Json(42.0));
    assert(Json(42) != Json(42.1));

    const string unicode_escape_test =
        R"([ "blah\ud83d\udca9blah\ud83dblah\udca9blah\u0000blah\u1234" ])";

    const char utf8[] = "blah" "\xf0\x9f\x92\xa9" "blah" "\xed\xa0\xbd" "blah"
                        "\xed\xb2\xa9" "blah" "\0" "blah" "\xe1\x88\xb4";

    Json uni = Json::parse(unicode_escape_test, err);
    assert(uni[0].string_value().size() == (sizeof utf8) - 1);
    assert(std::memcmp(uni[0].string_value().data(), utf8, sizeof utf8) == 0);

    // Demonstrates the behavior change in Xcode 7 / Clang 3.7 described
    // here: https://llvm.org/bugs/show_bug.cgi?id=23812
    Json nested_array = Json::array { Json::array { 1, 2, 3 } };
    assert(nested_array.is_array());
    assert(nested_array.array_items().size() == 1);
    assert(nested_array.array_items()[0].is_array());
    assert(nested_array.array_items()[0].array_items().size() == 3);

    Json my_json = Json::object {
        { "key1", "value1" },
        { "key2", false },
        { "key3", Json::array { 1, 2, 3 } },
    };
    std::string json_str = my_json.dump();
    printf("%s\n", json_str.c_str());

    class Point {
    public:
        int x;
        int y;
        Point (int x, int y) : x(x), y(y) {}
        Json to_json() const { return Json::array { x, y }; }
    };

    std::vector<Point> points = { { 1, 2 }, { 10, 20 }, { 100, 200 } };
    std::string points_json = Json(points).dump();
    printf("%s\n", points_json.c_str());
}