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// Copyright © 2024 Apple Inc.
#include "doctest/doctest.h"
#include "mlx/mlx.h"
using namespace mlx::core;
TEST_CASE("test einsum path") {
std::vector<std::vector<int>> expected = {{1, 2}, {0, 1}};
auto path =
einsum_path("ij,jk,kl", {ones({2, 2}), ones({2, 4}), ones({4, 2})}).first;
CHECK_EQ(path, expected);
expected = {{0}};
path = einsum_path("jki", {ones({2, 3, 4})}).first;
CHECK_EQ(path, expected);
expected = {{0, 1}};
path = einsum_path("i,i", {ones({2}), ones({1})}).first;
CHECK_EQ(path, expected);
expected = {{0, 1}};
path = einsum_path("ij,jk", {ones({2, 2}), ones({2, 2})}).first;
CHECK_EQ(path, expected);
expected = {{0, 1}};
path = einsum_path("ijk,jil->kl", {ones({3, 4, 5}), ones({4, 3, 2})}).first;
CHECK_EQ(path, expected);
expected = {{0, 3}, {1, 3}, {0, 2}, {0, 1}};
path = einsum_path(
"ijk,ilm,njm,nlk,abc->",
{ones({2, 6, 8}),
ones({2, 4, 5}),
ones({3, 6, 5}),
ones({3, 4, 8}),
ones({9, 4, 7})})
.first;
CHECK_EQ(path, expected);
expected = {{0, 2}, {0, 3}, {0, 2}, {0, 1}};
path = einsum_path(
"ea,fb,abcd,gc,hd->efgh",
{ones({10, 10}),
ones({10, 10}),
ones({10, 10, 10, 10}),
ones({10, 10}),
ones({10, 10})})
.first;
CHECK_EQ(path, expected);
}
TEST_CASE("test einsum") {
CHECK_THROWS(einsum("i,j", {array({1.0})}));
CHECK_THROWS(einsum("ijk", {full({2, 2}, 2.0f)}));
CHECK_THROWS(einsum("", {}));
CHECK_THROWS(einsum("ij", {array({1, 2})}));
CHECK_THROWS(einsum("", {array({1, 2})}));
CHECK_THROWS(einsum("i,ij", {array({1, 2}), array({2, 3})}));
CHECK_THROWS(einsum("i,i", {array({1, 2}), array({2, 3, 4})}));
CHECK_THROWS(einsum("i->ii", {array({1, 2})}));
CHECK_THROWS(einsum("12", {zeros({4, 4})}));
CHECK_THROWS(einsum("ii->i", {zeros({3, 2})}));
auto x = einsum("jki", {full({2, 3, 4}, 3.0f)});
auto expected = full({4, 2, 3}, 3.0f);
CHECK_EQ(allclose(x, expected).item<bool>(), true);
x = einsum("ij,jk->ik", {full({2, 2}, 2.0f), full({2, 2}, 3.0f)});
expected = array({12.0f, 12.0f, 12.0f, 12.0f}, {2, 2});
CHECK_EQ(allclose(x, expected).item<bool>(), true);
x = einsum("i,j->ij", {full({2}, 15.0f), full({4}, 20.0f)});
expected = full({2, 4}, 300.0f);
CHECK_EQ(allclose(x, expected).item<bool>(), true);
}
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