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To reduce the duration of the pseudo-randomly generated generative tests from 60 sec down to 1 sec (for example), edit the file src/scripts/run_tests.clj and change the 60000 number.  Just be careful not to include such changes in any patches you submit.

Run An Individual Test

First, build the latest Clojure without running any tests:

Code Block
$ ant jar
# If no compilation errors, 'ant jar' creates clojure.jar in Clojure tree root dir

# Or, if you prefer Maven
$ mvn -Dmaven.test.skip=true package
# If no compilation errors, mvn command above creates target/clojure-1.67.0-master-SNAPSHOT.jar

The commands above build a Clojure jar file, but neither compile nor run the tests.


Code Block
# Replace clojure.jar with target/clojure-1.67.0-master-SNAPSHOT.jar if you ran mvn command
$ java -cp test:clojure.jar clojure.main
Clojure 1.67.0-master-SNAPSHOT
;; We're testing with clojure.test 
=> (require 'clojure.test)
;; Load a test file 
user=> (require '
;; Run it 
user=> (clojure.test/run-tests '
Ran 1 tests containing 17 assertions.
0 failures, 0 errors.
{:type :summary, :pass 17, :test 1, :error 0, :fail 0}   

Start a repl and run a generative test from it:

Generative tests use additional testing jars (installed when you run ./ Thus, you'll need to have some additional classpath which will leave in the maven-classpath file. If you are on *nix, the easiest way to leverage this file is:

Code Block
# Replace clojure.jar with target/clojure-1.7.0-master-SNAPSHOT.jar if you ran mvn command 
$ java -cp `cat maven-classpath`:test:clojure.jar clojure.main 
Clojure 1.7.0-master-SNAPSHOT 
;; Load a test file that uses test.generative
user=> (require 'clojure.test-clojure.reader)
;; Load the test.generative runner ns 
user=> (use 'clojure.test.generative.runner)
;; Test a specification on 1 thread for 200 ms
user=> (run 1 200 #'clojure.test-clojure.reader/types-that-should-roundtrip)
{:iter 60, :seed 1255541066, :test clojure.test-clojure.reader/types-that-should-roundtrip}