Test 1.  Should print match four times
match
match
match
match
Test 2.  Should print no match three times
no match
no match
no match
Test 3.  Should print match three times
match
match
match
Test 4.  Should print file names with padded digits
padding=1
image.0
padding=2
image.00
padding=3
image.000
padding=5
image.00000
padding=8
image.00000000
Test Invalid
Expected failure 1 (no output)
Expected failure 2 (no output)
Expected failure 3 (no output)
Expected failure 4 (no output)
Expected failure 5 (no output)
