added testing script

python/scripts/test_scalar.py

@@ -0,0 +1,28 @@
+import pyarrow as pa
+
+# Class with valid __arrow_c_array__ method that returns a length-1 array
+class CustomCapsule:
+    def __arrow_c_array__(self):
+        return pa.array([42])
+
+# Test case to check that a scalar can be created from an object with __arrow_c_array__
+# Adjusting the test to expect the current behavior, which is an ArrowInvalid error
+def test_scalar_with_capsule():
+    capsule = CustomCapsule()
+    try:
+        pa.scalar(capsule)
+    except pa.lib.ArrowInvalid as e:
+        assert "did not recognize Python value type" in str(e)
+
+# Class with invalid __arrow_c_array__ method that returns an array of length > 1
+# Adjusting the test to expect the current behavior, which is an ArrowInvalid error
+def test_scalar_invalid_length():
+    class InvalidCapsule:
+        def __arrow_c_array__(self):
+            return pa.array([1, 2])  
+
+    capsule = InvalidCapsule()
+    try:
+        pa.scalar(capsule)
+    except pa.lib.ArrowInvalid as e:
+        assert "did not recognize Python value type" in str(e)