Addition of tests for Buffer Property

tests/test_buffer_property.py

@@ -0,0 +1,39 @@
+"Contains a collection of pytest tests that validates the buffer property."
+import random
+
+import pytest
+
+import nidaqmx
+from nidaqmx.constants import SampleTimingType
+from nidaqmx.errors import DaqError
+from nidaqmx.tests.helpers import generate_random_seed
+from nidaqmx.tests.test_read_write import TestDAQmxIOBase
+
+
+class TestBufferProperty(TestDAQmxIOBase):
+    """Contains a collection of pytest tests that validates the buffer property."""
+
+    @pytest.mark.parametrize("seed", [generate_random_seed()])
+    def test_int32_property(self, any_x_series_device, seed):
+        """Test for validating int32 attributes in buffer."""
+        # Reset the pseudorandom number generator with seed.
+        random.seed(seed)
+
+        with nidaqmx.Task() as task:
+            task.ai_channels.add_ai_voltage_chan(any_x_series_device.ai_physical_chans[0].name)
+            task.timing.samp_timing_type = SampleTimingType.SAMPLE_CLOCK
+            default_buffer_size = task.in_stream.input_buf_size
+
+            # Setting a valid input buffer size of type int32
+            task.in_stream.input_buf_size = 2000000000
+            assert task.in_stream.input_buf_size == 2000000000
+
+            # Setting a invalid input buffer size greater than int32
+            try:
+                task.in_stream.input_buf_size = 4000000000
+            except DaqError:
+                assert task.in_stream.input_buf_size == 2000000000
+
+            # Resetting input buffer size
+            del task.in_stream.input_buf_size
+            assert task.in_stream.input_buf_size == default_buffer_size