Fixup: test no numpy installed works as expected

.github/workflows/CI.yml

@@ -138,6 +138,10 @@ jobs:
         pip install cramjam --no-index --find-links dist --force-reinstall
         pip install -r dev-requirements.txt
         make test
+    - name: Test no numpy installed works
+      run: |
+        pip uninstall numpy -y
+        python -m pytest tests/test_no_numpy.py
     - name: Upload wheels
       uses: actions/upload-artifact@v2
       with:

tests/test_no_numpy.py

@@ -0,0 +1,23 @@
+import pytest
+import cramjam
+
+
+@pytest.mark.parametrize("obj", (bytes, bytearray, cramjam.Buffer, cramjam.File))
+@pytest.mark.parametrize(
+    "variant_str", ("snappy", "brotli", "lz4", "gzip", "deflate", "zstd")
+)
+def test_no_numpy_installed(tmpdir, obj, variant_str):
+    """
+    These operations should work even when numpy is not installed
+    """
+    if cramjam.File == obj:
+        data = obj(str(tmpdir.join("tmp.txt")))
+        data.write(b"data")
+        data.seek(0)
+    else:
+        data = obj(b"data")
+
+    variant = getattr(cramjam, variant_str)
+    compressed = variant.compress(data)
+    decompressed = variant.decompress(compressed)
+    assert decompressed.read() == b"data"