Fix numpy deprecation warnings (#252)

nptdms/test/test_tdms_file.py

@@ -25,10 +25,10 @@
 from nptdms.test import scenarios
 
 
-if sys.platform == "darwin":
-    # MacOS tests often take longer to run initially on GitHub actions
-    settings.register_profile('macos', deadline=5000)
-    settings.load_profile('macos')
+# When running tests on GitHub actions, the first iteration can be quite
+# slow and cause failures, so disable deadlines:
+settings.register_profile('ci', deadline=None)
+settings.load_profile('ci')
 
 
 @pytest.mark.parametrize("test_file,expected_data", scenarios.get_scenarios())

nptdms/types.py

@@ -229,6 +229,10 @@ class Boolean(StructType):
     size = 1
     struct_declaration = "b"
 
+    def __init__(self, value):
+        self.value = bool(value)
+        self.bytes = _struct_pack('<' + self.struct_declaration, self.value)
+
     @classmethod
     def read(cls, file, endianness="<"):
         return bool(super(Boolean, cls).read(file, endianness))

nptdms/writer.py

@@ -318,8 +318,7 @@ def to_file(file, array):
     try:
         array.tofile(file)
     except (TypeError, IOError, UnsupportedOperation):
-        # tostring actually returns bytes
-        file.write(array.tostring())
+        file.write(array.tobytes())
 
 
 def write_values(file, array):