Module `QCheck_base_runner`Source

Runners for Tests

Once you built some tests using QCheck2.Test.make, you need to run the tests. This module contains several runners, which are designed to run every test and report the result.

By default, you can use run_tests in a test program as follows:

  let testsuite = [
    Test.make ...;
    Test.make ...;
  ]

  let () =
    let errcode = QCheck_base_runner.run_tests ~verbose:true testsuite in
    exit errcode

which will run the tests, and exit the program. The error code will be 0 if all tests pass, 1 otherwise.

run_tests_main can be used as a shortcut for that, also featuring command-line parsing (using Arg) to activate verbose mode and others.

State

Sourceval random_state : unit -> Random.State.t

Access the current random state

Sourceval verbose : unit -> bool

Is the default mode verbose or quiet?

Sourceval long_tests : unit -> bool

Is the default mode to run long tests or nor?

Sourceval set_seed : int -> unit

Change the random_state by creating a new one, initialized with the given seed.

Sourceval set_verbose : bool -> unit

Change the value of verbose ()

Sourceval set_long_tests : bool -> unit

Change the value of long_tests ()

Sourceval get_time_between_msg : unit -> float

Get the minimum time to wait between printing messages.

since 0.9

Sourceval set_time_between_msg : float -> unit

Set the minimum tiem between messages.

since 0.9

Event handlers

Sourcetype counter = private {

start : float;
expected : int;
mutable gen : int;
mutable passed : int;
mutable failed : int;
mutable errored : int;

}

The type of counter used to keep tracks of the events received for a given test cell.

Sourcetype handler = {

handler : 'a. 'a QCheck2.Test.handler;

}

A type to represent polymorphic-enough handlers for test cells.

Source

type handler_gen =
  colors:bool ->
  debug_shrink:out_channel option ->
  debug_shrink_list:string list ->
  size:int ->
  out:out_channel ->
  verbose:bool ->
  counter ->
  handler

An alias type to a generator of handlers for test cells.

Sourceval default_handler : handler_gen

The default handler used.

Source

val debug_shrinking_choices : 
  colors:bool ->
  out:out_channel ->
  name:string ->
  'a QCheck2.Test.cell ->
  step:int ->
  'a ->
  unit

The function used by the default handler to debug shrinking choices. This can be useful to outside users trying to reproduce some of the base-runner behavior.

since 0.19

Run a Suite of Tests and Get Results

Source

val run_tests : 
  ?handler:handler_gen ->
  ?colors:bool ->
  ?verbose:bool ->
  ?long:bool ->
  ?debug_shrink:out_channel option ->
  ?debug_shrink_list:string list ->
  ?out:out_channel ->
  ?rand:Random.State.t ->
  QCheck2.Test.t list ->
  int

Run a suite of tests, and print its results. This is an heritage from the "qcheck" library.

returns
an error code, 0 if all tests passed, 1 otherwise.

parameter colors
if true (default), colorful output

parameter verbose
if true, prints more information about test cases (default: false)

parameter long
if true, runs the long versions of the tests (default: false)

parameter debug_shrink
debug_shrink:(Some ch) writes a log of successful shrink attempts to channel ch, for example ~debug_shrink:(Some (open_out "mylog.txt")). Use together with a non-empty list in ~debug_shrink_list.

parameter debug_shrink_list
the test names to log successful shrink attempts for, for example ~debug_shrink_list:["list_rev_is_involutive"]. Requires ~debug_shrink to be Some ch.

parameter out
print output to the provided channel (default: stdout)

parameter rand
start the test runner in the provided RNG state

Sourceval run_tests_main : ?argv:string array -> QCheck2.Test.t list -> 'a

Can be used as the main function of a test file. Exits with a non-0 code if the tests fail. It refers to run_tests for actually running tests after CLI options have been parsed.

The available options are:

"--verbose" (or "-v") for activating verbose tests
"--seed <n>" (or "-s <n>") for repeating a previous run by setting the random seed
"--long" for running the long versions of the tests

Below is an example of the output of the run_tests and run_tests_main function:

random seed: 438308050
generated  error;  fail; pass / total -     time -- test name
[✓] (1000)    0 ;    0 ; 1000 / 1000 --     0.5s -- list_rev_is_involutive
[✗] (   1)    0 ;    1 ;    0 /   10 --     0.0s -- should_fail_sort_id
[✗] (   1)    1 ;    0 ;    0 /   10 --     0.0s -- should_error_raise_exn
[✓] (1000)    0 ;    0 ; 1000 / 1000 --     0.0s -- collect_results

--- Failure --------------------------------------------------------------------

Test should_fail_sort_id failed (11 shrink steps):

[1; 0]

=== Error ======================================================================

Test should_error_raise_exn errored on (62 shrink steps):

0

exception QCheck_runner_test.Error
Raised at file "example/QCheck_runner_test.ml", line 20, characters 20-25
Called from file "src/QCheck.ml", line 839, characters 13-33


+++ Collect ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Collect results for test collect_results:

4: 207 cases
3: 190 cases
2: 219 cases
1: 196 cases
0: 188 cases

================================================================================
failure (1 tests failed, 1 tests errored, ran 4 tests)

Sourcemodule Color : sig ... end

Sourcemodule Raw : sig ... end

Install

Dune Dependency

Authors

Maintainers

Sources

doc/qcheck-core.runner/QCheck_base_runner/index.html

Module `QCheck_base_runner`Source

Runners for Tests

State

Event handlers

Run a Suite of Tests and Get Results

package qcheck-core

Install

Dune Dependency

Authors

Maintainers

Sources

doc/qcheck-core.runner/QCheck_base_runner/index.html

Module QCheck_base_runnerSource

Runners for Tests

State

Event handlers

Run a Suite of Tests and Get Results

Module `QCheck_base_runner`Source