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💚 make test deterministic

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Niels Lohmann 2020-07-15 12:14:30 +02:00
parent 9449dfcc6a
commit 496ddd127c
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1 changed files with 39 additions and 45 deletions
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84
test/src/unit-hash.cpp
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@ -32,59 +32,53 @@ SOFTWARE.
#include <nlohmann/json.hpp> #include <nlohmann/json.hpp>
using json = nlohmann::json; using json = nlohmann::json;
#include <set>
TEST_CASE("hash") TEST_CASE("hash")
{ {
SECTION("null") // Collect hashes for different JSON values and make sure that they are distinct
{ // We cannot compare against fixed values, because the implementation of
CHECK(std::hash<json> {}(json(nullptr)) == 2654435769U); // std::hash may differ between compilers.
}
SECTION("boolean") std::set<std::size_t> hashes;
{
CHECK(std::hash<json> {}(json(true)) == 2654436031U);
CHECK(std::hash<json> {}(json(false)) == 2654436030U);
}
SECTION("string") // null
{ hashes.insert(std::hash<json> {}(json(nullptr)));
CHECK(std::hash<json> {}(json("")) == 11160318156688833227U);
CHECK(std::hash<json> {}(json("foo")) == 910203211069189493U);
}
SECTION("number") // boolean
{ hashes.insert(std::hash<json> {}(json(true)));
CHECK(std::hash<json> {}(json(int(0))) == 2654436095U); hashes.insert(std::hash<json> {}(json(false)));
CHECK(std::hash<json> {}(json(unsigned(0))) == 2654436156U);
CHECK(std::hash<json> {}(json(-1)) == 2654436092U); // string
CHECK(std::hash<json> {}(json(0.0)) == 2654436221U); hashes.insert(std::hash<json> {}(json("")));
CHECK(std::hash<json> {}(json(42.23)) == 4631140164097181104U); hashes.insert(std::hash<json> {}(json("foo")));
}
SECTION("array") // number
{ hashes.insert(std::hash<json> {}(json(int(0))));
CHECK(std::hash<json> {}(json::array()) == 2654435899U); hashes.insert(std::hash<json> {}(json(unsigned(0))));
CHECK(std::hash<json> {}(json::array({1, 2, 3})) == 717272658337467U);
}
SECTION("object") hashes.insert(std::hash<json> {}(json(-1)));
{ hashes.insert(std::hash<json> {}(json(0.0)));
CHECK(std::hash<json> {}(json::object()) == 2654435832U); hashes.insert(std::hash<json> {}(json(42.23)));
CHECK(std::hash<json> {}(json::object({{"foo", "bar"}})) == 4042265434648078139U);
}
SECTION("binary") // array
{ hashes.insert(std::hash<json> {}(json::array()));
CHECK(std::hash<json> {}(json::binary({})) == 11093832941624U); hashes.insert(std::hash<json> {}(json::array({1, 2, 3})));
CHECK(std::hash<json> {}(json::binary({}, 0)) == 11093832941691U);
CHECK(std::hash<json> {}(json::binary({}, 42)) == 11093832941581U);
CHECK(std::hash<json> {}(json::binary({1, 2, 3})) == 3005324138949694928U);
CHECK(std::hash<json> {}(json::binary({1, 2, 3}, 0)) == 3005324138988516582U);
CHECK(std::hash<json> {}(json::binary({1, 2, 3}, 42)) == 3005324138986241627U);
}
SECTION("discarded") // object
{ hashes.insert(std::hash<json> {}(json::object()));
CHECK(std::hash<json> {}(json(json::value_t::discarded)) == 2654436338U); hashes.insert(std::hash<json> {}(json::object({{"foo", "bar"}})));
}
// binary
hashes.insert(std::hash<json> {}(json::binary({})));
hashes.insert(std::hash<json> {}(json::binary({}, 0)));
hashes.insert(std::hash<json> {}(json::binary({}, 42)));
hashes.insert(std::hash<json> {}(json::binary({1, 2, 3})));
hashes.insert(std::hash<json> {}(json::binary({1, 2, 3}, 0)));
hashes.insert(std::hash<json> {}(json::binary({1, 2, 3}, 42)));
// discarded
hashes.insert(std::hash<json> {}(json(json::value_t::discarded)));
CHECK(hashes.size() == 21);
} }