view ext/json11/test.cpp @ 185:3eb00e5c76c4

Pull step & block size out into framing struct, return in config

Update the C++ code to separate out the framing parameters (step and
block size) from the configuration structure into their own structure,
as in the latest schema, and to return the accepted framing params in
the configuration response.

This also implies that the plugin stub (which adapts Piper API
back to Vamp) makes a note of the returned values,
making them available via its own getPreferredStep/BlockSize
so that the host can retry the initialise call in the case where it
failed for having the wrong values first time.

#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());
}