tests: standardize file structure & naming

test/test_vhost-empty-string/test_vhost-empty-string.yml

@@ -0,0 +1,41 @@
+services:
+  sut:
+    image: nginxproxy/nginx-proxy:test
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+
+  web1:
+    image: web
+    expose:
+      - "81"
+    environment:
+      WEB_PORTS: "81"
+      # The space is intentional (should be trimmed).
+      VIRTUAL_HOST: " "
+
+  web2:
+    image: web
+    expose:
+      - "82"
+    environment:
+      WEB_PORTS: "82"
+      # The space is intentional (should be trimmed).
+      VIRTUAL_HOST: "web2.nginx-proxy.test ,"
+
+  web3:
+    image: web
+    expose:
+      - "83"
+    environment:
+      WEB_PORTS: "83"
+      # The space is intentional (should be trimmed).
+      VIRTUAL_HOST: " ,web3.nginx-proxy.test"
+
+  web4:
+    image: web
+    expose:
+      - "84"
+    environment:
+      WEB_PORTS: "84"
+      # The spaces are intentional (should be trimmed).
+      VIRTUAL_HOST: "web4a.nginx-proxy.test, , web4b.nginx-proxy.test"