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// Copyright © 2023 Apple Inc.
#include <filesystem>
#include <stdexcept>
#include <vector>
#include "doctest/doctest.h"
#include "mlx/mlx.h"
using namespace mlx::core;
std::string get_temp_file(const std::string& name) {
return std::filesystem::temp_directory_path().append(name).string();
}
TEST_CASE("test save_safetensors") {
std::string file_path = get_temp_file("test_arr.safetensors");
auto map = std::unordered_map<std::string, array>();
map.insert({"test", array({1.0, 2.0, 3.0, 4.0})});
map.insert({"test2", ones({2, 2})});
auto _metadata = std::unordered_map<std::string, std::string>();
_metadata.insert({"test", "test"});
_metadata.insert({"test2", "test2"});
save_safetensors(file_path, map, _metadata);
auto [dict, metadata] = load_safetensors(file_path);
CHECK_EQ(metadata, _metadata);
CHECK_EQ(dict.size(), 2);
CHECK_EQ(dict.count("test"), 1);
CHECK_EQ(dict.count("test2"), 1);
array test = dict.at("test");
CHECK_EQ(test.dtype(), float32);
CHECK_EQ(test.shape(), Shape{4});
CHECK(array_equal(test, array({1.0, 2.0, 3.0, 4.0})).item<bool>());
array test2 = dict.at("test2");
CHECK_EQ(test2.dtype(), float32);
CHECK_EQ(test2.shape(), Shape{2, 2});
CHECK(array_equal(test2, ones({2, 2})).item<bool>());
}
TEST_CASE("test gguf") {
std::string file_path = get_temp_file("test_arr.gguf");
using dict = std::unordered_map<std::string, array>;
dict original_weights = {
{"test", array({1.0f, 2.0f, 3.0f, 4.0f})},
{"test2", reshape(arange(6), {3, 2})}};
{
// Check saving loading just arrays, no metadata
save_gguf(file_path, original_weights);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 0);
CHECK_EQ(loaded_weights.size(), 2);
CHECK_EQ(loaded_weights.count("test"), 1);
CHECK_EQ(loaded_weights.count("test2"), 1);
for (auto [k, v] : loaded_weights) {
CHECK(array_equal(v, original_weights.at(k)).item<bool>());
}
}
// Test saving and loading string metadata
std::unordered_map<std::string, GGUFMetaData> original_metadata;
original_metadata.insert({"test_str", "my string"});
save_gguf(file_path, original_weights, original_metadata);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 1);
CHECK_EQ(loaded_metadata.count("test_str"), 1);
CHECK_EQ(std::get<std::string>(loaded_metadata.at("test_str")), "my string");
CHECK_EQ(loaded_weights.size(), 2);
CHECK_EQ(loaded_weights.count("test"), 1);
CHECK_EQ(loaded_weights.count("test2"), 1);
for (auto [k, v] : loaded_weights) {
CHECK(array_equal(v, original_weights.at(k)).item<bool>());
}
std::vector<Dtype> unsupported_types = {
bool_, uint8, uint32, uint64, int64, bfloat16, complex64};
for (auto t : unsupported_types) {
dict to_save = {{"test", astype(arange(5), t)}};
CHECK_THROWS(save_gguf(file_path, to_save, original_metadata));
}
std::vector<Dtype> supported_types = {int8, int32, float16, float32};
for (auto t : supported_types) {
auto arr = astype(arange(5), t);
dict to_save = {{"test", arr}};
save_gguf(file_path, to_save, original_metadata);
const auto& [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK(array_equal(loaded_weights.at("test"), arr).item<bool>());
}
}
TEST_CASE("test gguf metadata") {
std::string file_path = get_temp_file("test_arr.gguf");
using dict = std::unordered_map<std::string, array>;
dict original_weights = {
{"test", array({1.0f, 2.0f, 3.0f, 4.0f})},
{"test2", reshape(arange(6), {3, 2})}};
// Scalar array
{
std::unordered_map<std::string, GGUFMetaData> original_metadata;
original_metadata.insert({"test_arr", array(1.0)});
save_gguf(file_path, original_weights, original_metadata);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 1);
CHECK_EQ(loaded_metadata.count("test_arr"), 1);
auto arr = std::get<array>(loaded_metadata.at("test_arr"));
CHECK_EQ(arr.item<float>(), 1.0f);
}
// 1D Array
{
std::unordered_map<std::string, GGUFMetaData> original_metadata;
auto arr = array({1.0, 2.0});
original_metadata.insert({"test_arr", arr});
save_gguf(file_path, original_weights, original_metadata);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 1);
CHECK_EQ(loaded_metadata.count("test_arr"), 1);
auto loaded_arr = std::get<array>(loaded_metadata.at("test_arr"));
CHECK(array_equal(arr, loaded_arr).item<bool>());
// Preserves dims
arr = array({1.0});
original_metadata["test_arr"] = arr;
save_gguf(file_path, original_weights, original_metadata);
std::tie(loaded_weights, loaded_metadata) = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 1);
CHECK_EQ(loaded_metadata.count("test_arr"), 1);
loaded_arr = std::get<array>(loaded_metadata.at("test_arr"));
CHECK(array_equal(arr, loaded_arr).item<bool>());
}
// > 1D array throws
{
std::unordered_map<std::string, GGUFMetaData> original_metadata;
original_metadata.insert({"test_arr", array({1.0}, {1, 1})});
CHECK_THROWS(save_gguf(file_path, original_weights, original_metadata));
}
// empty array throws
{
std::unordered_map<std::string, GGUFMetaData> original_metadata;
original_metadata.insert({"test_arr", array({})});
CHECK_THROWS(save_gguf(file_path, original_weights, original_metadata));
}
// vector of string
{
std::unordered_map<std::string, GGUFMetaData> original_metadata;
std::vector<std::string> data = {"data1", "data2", "data1234"};
original_metadata.insert({"meta", data});
save_gguf(file_path, original_weights, original_metadata);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 1);
CHECK_EQ(loaded_metadata.count("meta"), 1);
auto& strs = std::get<std::vector<std::string>>(loaded_metadata["meta"]);
CHECK_EQ(strs.size(), 3);
for (int i = 0; i < strs.size(); ++i) {
CHECK_EQ(strs[i], data[i]);
}
}
// vector of string, string, scalar, and array
{
std::unordered_map<std::string, GGUFMetaData> original_metadata;
std::vector<std::string> data = {"data1", "data2", "data1234"};
original_metadata.insert({"meta1", data});
original_metadata.insert({"meta2", array(2.5)});
original_metadata.insert({"meta3", array({1, 2, 3})});
original_metadata.insert({"meta4", "last"});
save_gguf(file_path, original_weights, original_metadata);
auto [loaded_weights, loaded_metadata] = load_gguf(file_path);
CHECK_EQ(loaded_metadata.size(), 4);
auto& strs = std::get<std::vector<std::string>>(loaded_metadata["meta1"]);
CHECK_EQ(strs.size(), 3);
for (int i = 0; i < strs.size(); ++i) {
CHECK_EQ(strs[i], data[i]);
}
auto& arr = std::get<array>(loaded_metadata["meta2"]);
CHECK_EQ(arr.item<float>(), 2.5);
arr = std::get<array>(loaded_metadata["meta3"]);
CHECK(array_equal(arr, array({1, 2, 3})).item<bool>());
auto& str = std::get<std::string>(loaded_metadata["meta4"]);
CHECK_EQ(str, "last");
}
}
TEST_CASE("test single array serialization") {
// Basic test
{
auto a = random::uniform(-5.f, 5.f, {2, 5, 12}, float32);
std::string file_path = get_temp_file("test_arr.npy");
save(file_path, a);
auto b = load(file_path);
CHECK_EQ(a.dtype(), b.dtype());
CHECK_EQ(a.shape(), b.shape());
CHECK(array_equal(a, b).item<bool>());
}
// Other shapes
{
auto a = random::uniform(
-5.f,
5.f,
{
1,
},
float32);
std::string file_path = get_temp_file("test_arr_0.npy");
save(file_path, a);
auto b = load(file_path);
CHECK_EQ(a.dtype(), b.dtype());
CHECK_EQ(a.shape(), b.shape());
CHECK(array_equal(a, b).item<bool>());
}
{
auto a = random::uniform(
-5.f,
5.f,
{
46,
},
float32);
std::string file_path = get_temp_file("test_arr_1.npy");
save(file_path, a);
auto b = load(file_path);
CHECK_EQ(a.dtype(), b.dtype());
CHECK_EQ(a.shape(), b.shape());
CHECK(array_equal(a, b).item<bool>());
}
{
auto a = random::uniform(-5.f, 5.f, {5, 2, 1, 3, 4}, float32);
std::string file_path = get_temp_file("test_arr_2.npy");
save(file_path, a);
auto b = load(file_path);
CHECK_EQ(a.dtype(), b.dtype());
CHECK_EQ(a.shape(), b.shape());
CHECK(array_equal(a, b).item<bool>());
}
}
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