Method checkTree

Tests/HashTreeTests.cc:74–82

    }

    void checkTree(size_t N) {
        CHECK(tree.count() == N);
        for (size_t i = 0; i < N; i++) {
            auto value = tree.get(keys[i]);
            REQUIRE(value);
            CHECK(value.isInteger());
            CHECK(value.asInt() == values.get(uint32_t(i)).asInt());
        }
    }

    void checkIterator(size_t N) {
        set<slice> keysSeen;