1 files changed, 9 insertions, 0 deletions
diff --git a/t/README b/t/README
index 60d5b77bcc..94e09d025e 100644
--- a/t/README
+++ b/t/README
@@ -978,6 +978,15 @@ library for your script to use.
    output to the downstream---unlike the real version, it generates
    only up to 99 lines.
 
+ - test_bool_env <env-variable-name> <default-value>
+
+   Given the name of an environment variable with a bool value,
+   normalize its value to a 0 (true) or 1 (false or empty string)
+   return code.  Return with code corresponding to the given default
+   value if the variable is unset.
+   Abort the test script if either the value of the variable or the
+   default are not valid bool values.
+
 
 Prerequisites
 -------------