Merge pull request #114 from rayosborn/add-field-tests

Add NXfield test functions

src/nexusformat/nexus/tree.py

@@ -3835,6 +3835,14 @@ def plot_rank(self):
         """Rank of the NXfield when plotting."""
         return len(self.plot_shape)
 
+    def is_numeric(self):
+        """True if the NXfield contains numeric data."""
+        return not is_string_dtype(self.dtype)
+
+    def is_string(self):
+        """True if the NXfield contains strings."""
+        return is_string_dtype(self.dtype)
+
     def is_plottable(self):
         """True if the NXfield is plottable."""
         if self.plot_rank > 0:

tests/test_fields.py

@@ -18,6 +18,7 @@ def test_string_field_creation(text):
 
     assert field.nxvalue == text
     assert field.dtype == string_dtype
+    assert field.is_string()
     assert len(field) == 0
 
 
@@ -29,6 +30,7 @@ def test_byte_field_creation(text):
     assert field.nxvalue == text
     assert field.nxdata.decode(NX_ENCODING) == text
     assert field.dtype != string_dtype
+    assert field.is_string()
     assert len(field) == 0
 
 
@@ -42,6 +44,7 @@ def test_array_field_creation(arr):
     assert field.shape == arr.shape
     assert field.dtype == arr.dtype
     assert field.size == arr.size
+    assert field.is_numeric()
     assert len(field) == len(arr)
     assert field.reshape((field.size)) == NXfield(arr.reshape((arr.size)))