Falderal Test: "freestyle" format for tests

This document tests the alternate ("freestyle") format for tests introduced in the Falderal Literate Test Format version 0.11. This format allows the test body to consist entirely of un-prefixed text, as long as it is written in a single indented block, and as long as the final line(s) of the test begin with one of the prefixes => or ==> or ===> or ?> or ??>or ???>.

-> Functionality "Cat" is implemented by shell command "python3 cat.py"

-> Tests for functionality "Cat"

Cat cats.

meow
=> meow

meow
==> meow

meow
===> meow

There may be multiple final lines.

purr
prrr
prreow
==> purr
==> prrr
==> prreow

The use of ==> means that any text in the preceding lines that would, in the previous format, be recognized as prefixes, are no longer recognized as prefixes.

| purr
| prrr
= prreow
=> | purr
=> | prrr
=> = prreow

| purr
+ prrr
? prreow
=> | purr
=> + prrr
=> ? prreow

purr
-> prrr
prreow
===> purr
===> -> prrr
===> prreow

Demonstrate error expectation (Intentional fail.)

meow
?> woof

meow
??> woof

| meow
? rreoww
???> bow
???> wow

Freestyle-format tests can also contain input sections.

-> Functionality "Silly Interpreter" is implemented by
-> shell command "python3 silly-interpreter.py %(test-body-file)"

-> Tests for functionality "Silly Interpreter"

read x
read y
print y
print x
<= meow
<= purr
=> purr
=> meow

read x
read y
print y
print x
<== meow
<== purr
==> purr
==> meow

read x
read y
print y
print x
<=== meow
<=== purr
===> purr
===> meow

The trick of re-using the previous test body with a different test input if the test body is omitted doesn't work with freestyle-format test input sections (i.e., this will fail.)

<== zing
<== zang
==> zang
==> zing