ProSum Bugs Found with Blink Test

  1. Negative numbers appear in the lower field only.
  2. "100" appears occasionally in either field, but the allowed range is -99 to 99.
Earl Everett told me that I was the first person he had seen do this test to find those bugs. Imagine how difficult it would be to find those bugs using any other approach (other than code inspection. But hey, I'm talking testing, here).