Improve path rule (#8623)

* Improve path rule

* Add nginx configuration tests

* Revert framework changes

* Add test to patched directives

* Fix root conf test

* Add comment in new function

test/e2e/nginx/nginx.go

@@ -0,0 +1,132 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package nginx
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/onsi/ginkgo"
+
+	"k8s.io/ingress-nginx/test/e2e/framework"
+)
+
+var (
+	cfgOK = `#
+	events {
+		worker_connections  1024;
+		multi_accept on;
+	}
+	
+	http {
+		default_type 'text/plain';
+		client_max_body_size 0;
+	
+		server {
+			access_log on;
+			access_log /dev/stdout;
+	
+			listen 80;
+	
+			location / {
+				content_by_lua_block {
+					ngx.print("ok")
+				}
+			}
+		}
+	}
+	`
+
+	cfgAlias = `#
+	events {
+		worker_connections  1024;
+		multi_accept on;
+	}
+	
+	http {
+		default_type 'text/plain';
+		client_max_body_size 0;
+	
+		server {
+			access_log on;
+			access_log /dev/stdout;
+	
+			listen 80;
+	
+			location / {
+				alias /www/html;
+			}
+		}
+	}
+	`
+
+	cfgRoot = `#
+	events {
+		worker_connections  1024;
+		multi_accept on;
+	}
+	
+	http {
+		default_type 'text/plain';
+		client_max_body_size 0;
+		root /srv/www;
+		server {
+			access_log on;
+			access_log /dev/stdout;
+	
+			listen 80;
+	
+		}
+	}
+	`
+)
+
+var _ = framework.DescribeSetting("nginx-configuration", func() {
+	f := framework.NewSimpleFramework("nginxconfiguration")
+
+	ginkgo.It("start nginx with default configuration", func() {
+
+		f.NGINXWithConfigDeployment("default-nginx", cfgOK)
+		f.WaitForPod("app=default-nginx", 60*time.Second, false)
+		framework.Sleep(5 * time.Second)
+
+		f.HTTPDumbTestClient().
+			GET("/").
+			WithURL(fmt.Sprintf("http://default-nginx.%s", f.Namespace)).
+			Expect().
+			Status(http.StatusOK).Body().Contains("ok")
+	})
+
+	ginkgo.It("fails when using alias directive", func() {
+
+		f.NGINXDeployment("alias-nginx", cfgAlias, false)
+		// This should fail with a crashloopback because our NGINX does not have
+		// alias directive!
+		f.WaitForPod("app=alias-nginx", 60*time.Second, true)
+
+	})
+
+	ginkgo.It("fails when using root directive", func() {
+
+		f.NGINXDeployment("root-nginx", cfgRoot, false)
+		// This should fail with a crashloopback because our NGINX does not have
+		// root directive!
+		f.WaitForPod("app=root-nginx", 60*time.Second, true)
+
+	})
+})