1 file changed, 16 insertions, 2 deletions
diff --git a/tests/t0004-docs.sh b/tests/t0004-docs.sh
index 292223f..85a4d8e 100755
--- a/tests/t0004-docs.sh
+++ b/tests/t0004-docs.sh
@@ -2,8 +2,9 @@
 
 # Checks that the configuration documents stay consistent with each other.
 # The manual documents every key the reference config sets, the reference
-# config sets every key the manual documents, and both settings sections of
-# the manual keep their entries sorted.
+# config sets every key the manual documents, both settings sections of the
+# manual keep their entries sorted, and the three server configs carry one
+# identical content security policy.
 
 test_description='Check the configuration documents'
 . ./setup.sh
@@ -49,4 +50,17 @@ test_expect_success 'the manual lists its repository settings in order' '
 	LC_ALL=C sort -c repo-order
 '
 
+# The policy is spelled out once per server syntax, so nothing but this check
+# keeps the three copies from drifting apart.
+test_expect_success 'the server configs agree on one content security policy' '
+	for server in apache lighttpd nginx; do
+		grep "Content-Security-Policy" \
+			"$ROOT/custom/servers/$server.conf" |
+		grep "default-src" |
+		sed "s/.*\"\(default-src[^\"]*\)\".*/\1/" || return 1
+	done >policies &&
+	test_line_count = 3 policies &&
+	test $(sort -u policies | wc -l) -eq 1
+'
+
 test_done