add tests for v2 group attributes and

Author: brokkoli71

src/test/java/dev/zarr/zarrjava/ZarrPythonTests.java

@@ -404,7 +404,7 @@ public void testZstdLibrary(int clevel, boolean checksumFlag) throws IOException
     public void testGroupReadWriteV2() throws Exception {
         StoreHandle storeHandle = new FilesystemStore(TESTOUTPUT).resolve("group_write");
         StoreHandle storeHandle2 = new FilesystemStore(TESTOUTPUT).resolve("group_read");
-        Group group = Group.create(storeHandle);
+        Group group = Group.create(storeHandle, new Attributes(b -> b.set("attr", "value")));
         dev.zarr.zarrjava.v2.DataType dataType = dev.zarr.zarrjava.v2.DataType.INT32;
         dev.zarr.zarrjava.v2.Array array = group.createGroup("group").createArray("array", arrayMetadataBuilder -> arrayMetadataBuilder
                 .withShape(16, 16, 16)
@@ -417,6 +417,7 @@ public void testGroupReadWriteV2() throws Exception {
         run_python_script("zarr_python_group_v2.py", storeHandle.toPath().toString(), storeHandle2.toPath().toString());
 
         Group group2 = Group.open(storeHandle2);
+        Assertions.assertEquals("value", group2.metadata().attributes().get("attr"));
         Group subgroup = (Group) group2.get("group2");
         Assertions.assertNotNull(subgroup);
         dev.zarr.zarrjava.v2.Array array2 = (dev.zarr.zarrjava.v2.Array) subgroup.get("array2");

src/test/java/dev/zarr/zarrjava/ZarrV2Test.java

@@ -252,6 +252,10 @@ public void testCreateGroup() throws ZarrException, IOException {
 
         Group.create(storeHandleString);
         Assertions.assertTrue(Files.exists(Paths.get(storeHandleString).resolve(".zgroup")));
+
+        Group.create(storeHandleString, new Attributes(b -> b.set("some", "value")));
+        Assertions.assertTrue(Files.exists(Paths.get(storeHandleString).resolve(".zgroup")));
+        Assertions.assertTrue(Files.exists(Paths.get(storeHandleString).resolve(".zattrs")));
     }
 
     @Test

src/test/python-scripts/zarr_python_group_v2.py

@@ -11,12 +11,14 @@
 expected_data = np.arange(16 * 16 * 16, dtype='int32').reshape(16, 16, 16)
 
 g = zarr.open_group(store=LocalStore(store_path_read), zarr_format=2)
+assert g.attrs['attr'] == 'value'
 a = g['group']['array']
 read_data = a[:, :]
 assert np.array_equal(read_data, expected_data), f"got:\n {read_data} \nbut expected:\n {expected_data}"
 
 store_path_write = Path(sys.argv[2])
 g2 = zarr.create_group(store=LocalStore(store_path_write), zarr_format=2)
+g2.attrs['attr'] = 'value'
 a2 = g2.create_group('group2').create_array(
     name='array2',
     shape=(16, 16, 16),