1 files changed, 17 insertions, 0 deletions
diff --git a/tests/qc/test_cells_average.py b/tests/qc/test_cells_average.py
new file mode 100644
index 0000000..c2b382a
--- /dev/null
+++ b/tests/qc/test_cells_average.py
@@ -0,0 +1,17 @@
+import re
+from random import randint
+from hypothesis import given
+from hypothesis import strategies as st
+
+from quality_control.average import invalid_value as avg_invalid_value
+
+@given(num_str=st.from_regex(r"^[0-9]+$", fullmatch=True))
+def test_cell_average_value_pass_if_no_decimal_places(num_str):
+    """
+    GIVEN: `num_str` is a string representing a number with no decimal places,
+      e.g. 2, 39, 8420
+    WHEN: `num_str` is provided as an argument to `avg_invalid_value` function,
+    THEN: `avg_invalid_value` returns `None`
+    """
+    line, col = randint(0, 100), randint(0, 20)
+    assert avg_invalid_value(line, col, num_str) is None