Missing file errors when running tests

[YuhanLiin]

When I run cargo test for the first time I get the following:

running 10 tests
test test::set_embedding_dim ... ok
test test::set_epochs ... ok
test test::exact_tsne ... FAILED
test test::set_final_momentum ... ok
test test::set_learning_rate ... ok
test test::set_momentum ... ok
test test::set_momentum_switch_epoch ... ok
test test::set_perplexity ... ok
test test::set_stop_lying_epoch ... ok
test test::barnes_hut_tsne ... FAILED

failures:

---- test::exact_tsne stdout ----
thread 'test::exact_tsne' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/test.rs:77:87

---- test::barnes_hut_tsne stdout ----
thread 'test::barnes_hut_tsne' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/test.rs:107:87
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


failures:
    test::barnes_hut_tsne
    test::exact_tsne

It looks like the tests expect several CSV data files, but they're not there.