Method checkReadU

Tests/EncoderTests.cc:91–102

    }

    void checkReadU(uint64_t i) {
        auto v = Value::fromData(result);
        if (!v || v->type() != kNumber || !v->isInteger() || v->asUnsigned() != i || v->asDouble() != (double)i) {
            REQUIRE(v != nullptr);
        REQUIRE(v->type() == kNumber);
        REQUIRE(v->isInteger());
            REQUIRE(v->asUnsigned() == i);
            REQUIRE(v->asDouble() == (double)i);
        }
        if (i >= (UINT64_MAX >> 1))
            REQUIRE(v->isUnsigned());
    }

    void checkReadFloat(float f) {
        auto v = Value::fromData(result);