12: add custom assertion to DRY

[danielinteractive]

closes #12

(DRY: Don't Repeat Yourself :-))

[github-actions]

Code Coverage Summary

Filename                      Stmts    Miss  Cover    Missing
--------------------------  -------  ------  -------  ---------
R/aalen_johansen.R               62       0  100.00%
R/assert.R                        5       0  100.00%
R/generate_data.R                27       0  100.00%
R/inc_prop.R                      7       0  100.00%
R/one_minus_kaplan_meier.R       21       0  100.00%
R/prop_trans_inc_dens_ce.R       23       0  100.00%
R/prop_trans_inc_dens.R          10       0  100.00%
TOTAL                           155       0  100.00%

Diff against main

Filename                      Stmts    Miss  Cover
--------------------------  -------  ------  --------
R/aalen_johansen.R               -3       0  +100.00%
R/assert.R                       +5       0  +100.00%
R/inc_prop.R                     -3       0  +100.00%
R/one_minus_kaplan_meier.R       -3       0  +100.00%
R/prop_trans_inc_dens_ce.R       -3       0  +100.00%
R/prop_trans_inc_dens.R          -3       0  +100.00%
TOTAL                           -10       0  +100.00%

Results for commit: e5dbebc

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[github-actions]

Unit Tests Summary

 1 files   7 suites   1s ⏱️
12 tests 12 ✅ 0 💤 0 ❌
19 runs  19 ✅ 0 💤 0 ❌

Results for commit e5dbebc.

[github-actions]

Unit Test Performance Difference

Test Suite	$Status$	Time on main	$±Time$	$±Tests$	$±Skipped$	$±Failures$	$±Errors$
assert	👶		$+0.04$	$+6$	$0$	$0$	$0$

Additional test case details

Test Suite	$Status$	Time on main	$±Time$	Test Case
assert	👶		$+0.02$	assert_ae_data_fails_as_expected
assert	👶		$+0.02$	assert_ae_data_passes_as_expected

Results for commit 05d1692

♻️ This comment has been updated with latest results.

[kuenzelt]

thanks very much!