Running test submodule as main hook - racket

Question

Given this code:
#lang racket/base
(module+ test
(require rackunit rackunit/text-ui)
(provide suite)
(define suite
(test-suite
"test tests"
(test-equal? "test string test"
"string"
"string")))
(run-tests suite))
;(require 'test)
;(suite)
If the last two lines are left commented and the file is run with raco test test.rkt, will output
raco test: (submod "test.rkt" test)
1 success(es) 0 failure(s) 0 error(s) 1 test(s) run
0
1 test passed
Which is expected.
How can I make the file run its tests when it's run just as a script, not by raco?
I thought the two commented lines at the end would do what I want: import the submodule and then call the function,
(require 'test)
(suite)
but instead I get:
$ racket test.rkt
require: unknown module
module name: #<resolved-module-path:'test>
context...:
standard-module-name-resolver
Learn Racket in Y Minutes seems to say that 'test as a 'symbol is for submodules, but perhaps not.

Answer 1

Submodules declared with module+ and module* aren't available for require in their containing module because they can depend on their containing module, and cycles in the module dependency graph aren't allowed. (In contrast, submodules declared with module can't depend on their containing module, but their containing module can require them.)
Try adding a main submodule; that should get run when the file is run as a script:
(module+ main
(require (submod ".." test))
(run-tests suite))
BTW, the Racket convention is for the test submodule to run the tests, not just to define them. Adding a main submodule might make raco test stop working for your script; the fix would be to move the (run-tests suite) call to the test submodule instead.