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-rw-r--r--doc/testing.txt15
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diff --git a/doc/testing.txt b/doc/testing.txt
index b64d5a4..26000c6 100644
--- a/doc/testing.txt
+++ b/doc/testing.txt
@@ -27,3 +27,18 @@ Adding a new regression test:
Note that test files which don't have an *-expected.<suffix> file will
be ignored for the test apps in question.
+
+Troubleshooting a failed test:
+------------------------------
+
+You can run a single test by running
+ $ ctest -R testname
+
+You can run a series by running
+ $ ctest -R cgalpng # runs all cgalpng tests
+ $ ctest -R sphere # runs all sphere tests
+
+Logs of test runs are found in tests/build/Testing/Temporary
+Expected results are found in tests/regression/*
+Actual results are found in tests/build/testname-output/*
+
contact: Jan Huwald // Impressum