[Roman Numerals] quick.Check test seems to always pass with regular int parameter

[heygarrett]

In the chapter Intro to property based tests we use the testing/quick package to create a new test, TestPropertiesOfConversion.

After creating the test:

Try running it; your computer may hang for a while, so kill it when you're bored :)

The test initially failed for me, but then it froze on the second run:

❮ go test ./numeral
--- FAIL: TestPropertiesOfConversion (0.00s)
    numeral_test.go:82: failed checks #1: failed on input -4221796472621171664
FAIL
FAIL    main/numeral    0.216s
FAIL
 
❮ go test ./numeral
^C⏎                                                                                                                                                                     

After adding this to the assertion function:

   if arabic < 0 || arabic > 3999 {
   	log.Println(arabic)
   	return true
   }

The book says:

You should see something like this:

=== RUN   TestPropertiesOfConversion
2019/07/09 14:41:27 6849766357708982977
2019/07/09 14:41:27 -7028152357875163913
2019/07/09 14:41:27 -6752532134903680693
2019/07/09 14:41:27 4051793897228170080
2019/07/09 14:41:27 -1111868396280600429
2019/07/09 14:41:27 8851967058300421387
2019/07/09 14:41:27 562755830018219185

But the test only passes for me after doing this:

❮ go test ./numeral
ok      main/numeral    0.184s
 
❮ go test ./numeral
ok      main/numeral    (cached)
 
❮ go test ./numeral
ok      main/numeral    (cached)
 
❮ go test ./numeral
ok      main/numeral    (cached)

I even tried clearing the cache, but no luck:

❯ go clean -cache
 
❮ go test ./numeral
ok      main/numeral    0.199s

If it matters:

❯ go version
go version go1.21.0 darwin/arm64