Test validation for wildcard match in middle of path (#23752)

Test validation for wildcard match in middle of path

Additional Description:
Pattern matching does not support wildcard matching in the middle of a path. This test checks that it is not allowed in config.

Signed-off-by: silverstar195 <seanmaloney@google.com>

test/common/router/config_impl_test.cc

@@ -9314,6 +9314,35 @@ TEST_F(RouteMatcherTest, PatternMatchInvalidVariableName) {
  EnvoyException, "path_match_policy.path_template /rest/{on==e}/{two} is invalid");
 }
 
+TEST_F(RouteMatcherTest, PatternMatchInvalidPlacedWildcard) {
+ const std::string yaml = R"EOF(
+virtual_hosts:
+ - name: path_pattern
+ domains: ["*"]
+ routes:
+ - match:
+ path_match_policy:
+ name: envoy.path.match.uri_template.pattern_template_match_predicate
+ typed_config:
+ "@type": type.googleapis.com/envoy.extensions.path.match.uri_template.v3.UriTemplateMatchConfig
+ path_template: "/rest/{middlewildcard=**}/{two}"
+ case_sensitive: false
+ route:
+ cluster: "path-pattern-cluster-one"
+ path_rewrite_policy:
+ name: envoy.path.rewrite.uri_template.pattern_template_rewrite_predicate
+ typed_config:
+ "@type": type.googleapis.com/envoy.extensions.path.rewrite.uri_template.v3.UriTemplateRewriteConfig
+ path_template_rewrite: "/rest/{middlewildcard=**}/{two}"
+ )EOF";
+ NiceMock<Envoy::StreamInfo::MockStreamInfo> stream_info;
+ factory_context_.cluster_manager_.initializeClusters({"path-pattern-cluster-one"}, {});
+
+ EXPECT_THROW_WITH_MESSAGE(
+ TestConfigImpl config(parseRouteConfigurationFromYaml(yaml), factory_context_, true),
+ EnvoyException, "path_match_policy.path_template /rest/{middlewildcard=**}/{two} is invalid");
+}
+
 TEST_F(RouteMatcherTest, PatternMatchWildcardUnnamedVariable) {
  const std::string yaml = R"EOF(
 virtual_hosts: