Add integration tests for nginx plugin (#5441)

* Add a rewrite directive for the .well-known location so we don't hit existing rewrites

* add comment

* Add (nonexistent) document root so we don't use the default value

* Add integration tests for nginx plugin

* add a sleep 5 to test on travis

* put sleep 5 in the right spot

* test return status of grep respecting -e and note that we're actually not posix compliant

* redelete newline

certbot-nginx/tests/boulder-integration.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -xe
+#!/bin/bash -xe
 # prerequisite: apt-get install --no-install-recommends nginx-light openssl
 
 . ./tests/integration/_common.sh
@@ -6,13 +6,15 @@
 export PATH="/usr/sbin:$PATH"  # /usr/sbin/nginx
 nginx_root="$root/nginx"
 mkdir $nginx_root
-original=$(root="$nginx_root" ./certbot-nginx/tests/boulder-integration.conf.sh)
-nginx_conf="$nginx_root/nginx.conf"
-echo "$original" > $nginx_conf
 
+reload_nginx () {
+    original=$(root="$nginx_root" ./certbot-nginx/tests/boulder-integration.conf.sh)
+    nginx_conf="$nginx_root/nginx.conf"
+    echo "$original" > $nginx_conf
 
-killall nginx || true
-nginx -c $nginx_root/nginx.conf
+    killall nginx || true
+    nginx -c $nginx_root/nginx.conf
+}
 
 certbot_test_nginx () {
     certbot_test \
@@ -32,10 +34,30 @@ test_deployment_and_rollback() {
     diff -q <(echo "$original") $nginx_conf
 }
 
+export default_server="default_server"
+reload_nginx
 certbot_test_nginx --domains nginx.wtf run
 test_deployment_and_rollback nginx.wtf
 certbot_test_nginx --domains nginx2.wtf --preferred-challenges http
 test_deployment_and_rollback nginx2.wtf
+# Overlapping location block and server-block-level return 301
+certbot_test_nginx --domains nginx3.wtf --preferred-challenges http
+test_deployment_and_rollback nginx3.wtf
+# No matching server block; default_server exists
+certbot_test_nginx --domains nginx4.wtf --preferred-challenges http
+test_deployment_and_rollback nginx4.wtf
+# No matching server block; default_server does not exist
+export default_server=""
+reload_nginx
+if nginx -c $nginx_root/nginx.conf -T 2>/dev/null | grep "default_server"; then
+    echo "Failed to remove default_server"
+    exit 1
+fi
+certbot_test_nginx --domains nginx5.wtf --preferred-challenges http
+test_deployment_and_rollback nginx5.wtf
+# Mutiple domains, mix of matching and not
+certbot_test_nginx --domains nginx6.wtf,nginx7.wtf --preferred-challenges http
+test_deployment_and_rollback nginx6.wtf
 
 # note: not reached if anything above fails, hence "killall" at the
 # top