diff --git a/plugins/wasm-go/extensions/ext-auth/config/config.go b/plugins/wasm-go/extensions/ext-auth/config/config.go
index 886d4761cd..5709bbf9b0 100644
--- a/plugins/wasm-go/extensions/ext-auth/config/config.go
+++ b/plugins/wasm-go/extensions/ext-auth/config/config.go
@@ -65,7 +65,7 @@ func ParseConfig(json gjson.Result, config *ExtAuthConfig, log wrapper.Log) erro
 		return err
 	}
 
-	if err := parseMatchRules(json, config, log); err != nil {
+	if err := parseMatchRules(json, config); err != nil {
 		return err
 	}
 
@@ -241,7 +241,7 @@ func parseAuthorizationResponseConfig(json gjson.Result, httpService *HttpServic
 	return nil
 }
 
-func parseMatchRules(json gjson.Result, config *ExtAuthConfig, log wrapper.Log) error {
+func parseMatchRules(json gjson.Result, config *ExtAuthConfig) error {
 	matchListConfig := json.Get("match_list")
 	if !matchListConfig.Exists() {
 		config.MatchRules = expr.MatchRulesDefaults()
@@ -260,10 +260,15 @@ func parseMatchRules(json gjson.Result, config *ExtAuthConfig, log wrapper.Log)
 	var err error
 
 	matchListConfig.ForEach(func(key, value gjson.Result) bool {
-		pathMatcher, err := expr.BuildStringMatcher(
+		pathMatcher, buildErr := expr.BuildStringMatcher(
 			value.Get("match_rule_type").Str,
 			value.Get("match_rule_path").Str, false)
-		if err != nil {
+		if buildErr != nil {
+			err = fmt.Errorf("failed to build string matcher for rule with domain %q, path %q, type %q: %w",
+				value.Get("match_rule_domain").Str,
+				value.Get("match_rule_path").Str,
+				value.Get("match_rule_type").Str,
+				buildErr)
 			return false // stop iterating
 		}
 		ruleList = append(ruleList, expr.Rule{
@@ -274,7 +279,7 @@ func parseMatchRules(json gjson.Result, config *ExtAuthConfig, log wrapper.Log)
 	})
 
 	if err != nil {
-		return fmt.Errorf("failed to build string matcher for rule %v: %w", matchListConfig, err)
+		return err
 	}
 
 	config.MatchRules = expr.MatchRules{
diff --git a/plugins/wasm-go/extensions/ext-auth/config/config_test.go b/plugins/wasm-go/extensions/ext-auth/config/config_test.go
index 5472491cfc..02750356e7 100644
--- a/plugins/wasm-go/extensions/ext-auth/config/config_test.go
+++ b/plugins/wasm-go/extensions/ext-auth/config/config_test.go
@@ -1,136 +1,368 @@
 package config
 
 import (
-	"errors"
-	"strings"
+	"testing"
 
-	regexp "github.com/wasilibs/go-re2"
+	"ext-auth/expr"
+	"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
+	"github.com/stretchr/testify/assert"
+	"github.com/tidwall/gjson"
 )
 
-const (
-	MatchPatternExact    string = "exact"
-	MatchPatternPrefix   string = "prefix"
-	MatchPatternSuffix   string = "suffix"
-	MatchPatternContains string = "contains"
-	MatchPatternRegex    string = "regex"
-
-	MatchIgnoreCase string = "ignore_case"
-)
-
-type Matcher interface {
-	Match(s string) bool
-}
-
-type stringExactMatcher struct {
-	target     string
-	ignoreCase bool
-}
-
-func (m *stringExactMatcher) Match(s string) bool {
-	if m.ignoreCase {
-		return strings.ToLower(s) == m.target
-	}
-	return s == m.target
-}
-
-type stringPrefixMatcher struct {
-	target     string
-	ignoreCase bool
-}
-
-func (m *stringPrefixMatcher) Match(s string) bool {
-	if m.ignoreCase {
-		return strings.HasPrefix(strings.ToLower(s), m.target)
+func TestParseConfig(t *testing.T) {
+	tests := []struct {
+		name        string
+		json        string
+		expected    ExtAuthConfig
+		expectedErr string
+	}{
+		{
+			name: "Valid Config with Default Values",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "envoy",
+					"endpoint": {
+						"service_name": "example.com",
+						"service_port": 80,
+						"path_prefix": "/auth"
+					}
+				}
+			}`,
+			expected: ExtAuthConfig{
+				HttpService: HttpService{
+					EndpointMode: "envoy",
+					Client: wrapper.NewClusterClient(wrapper.FQDNCluster{
+						FQDN: "example.com",
+						Port: 80,
+						Host: "",
+					}),
+					PathPrefix: "/auth",
+					Timeout:    1000,
+				},
+				MatchRules:                expr.MatchRulesDefaults(),
+				FailureModeAllow:          false,
+				FailureModeAllowHeaderAdd: false,
+				StatusOnError:             403,
+			},
+		},
+		{
+			name: "Valid Config with Custom Values",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "forward_auth",
+					"endpoint": {
+						"service_name": "auth.example.com",
+						"service_port": 8080,
+						"service_host": "auth.example.com",
+						"request_method": "POST",
+						"path": "/auth"
+					},
+					"timeout": 2000,
+					"authorization_request": {
+						"headers_to_add": {
+							"X-Auth-Source": "wasm"
+						},
+						"with_request_body": true,
+						"max_request_body_bytes": 1048576
+					}
+				},
+				"skipped_path_prefixes": ["/health", "/metrics"],
+				"failure_mode_allow": true,
+				"failure_mode_allow_header_add": true,
+				"status_on_error": 500
+			}`,
+			expected: ExtAuthConfig{
+				HttpService: HttpService{
+					EndpointMode: "forward_auth",
+					Client: wrapper.NewClusterClient(wrapper.FQDNCluster{
+						FQDN: "auth.example.com",
+						Port: 8080,
+						Host: "auth.example.com",
+					}),
+					RequestMethod: "POST",
+					Path:          "/auth",
+					Timeout:       2000,
+					AuthorizationRequest: AuthorizationRequest{
+						HeadersToAdd: map[string]string{
+							"X-Auth-Source": "wasm",
+						},
+						WithRequestBody:     true,
+						MaxRequestBodyBytes: 1048576,
+					},
+				},
+				MatchRules:                expr.MatchRulesDefaults(),
+				FailureModeAllow:          true,
+				FailureModeAllowHeaderAdd: true,
+				StatusOnError:             500,
+			},
+		},
+		{
+			name:        "Missing HttpService Configuration",
+			json:        `{}`,
+			expectedErr: "missing http_service in config",
+		},
+		{
+			name: "Invalid Endpoint Mode",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "invalid_mode",
+					"endpoint": {
+						"service_name": "example.com",
+						"service_port": 80
+					}
+				}
+			}`,
+			expectedErr: "endpoint_mode invalid_mode is not supported",
+		},
+		{
+			name: "Missing Endpoint Configuration",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "envoy"
+				}
+			}`,
+			expectedErr: "missing endpoint in config",
+		},
+		{
+			name: "Empty Service Name",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "envoy",
+					"endpoint": {
+						"service_name": "",
+						"service_port": 80
+					}
+				}
+			}`,
+			expectedErr: "endpoint service name must not be empty",
+		},
+		{
+			name: "Invalid Request Method with Request Body",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "forward_auth",
+					"endpoint": {
+						"service_name": "auth.example.com",
+						"service_port": 8080,
+						"request_method": "GET",
+						"path": "/auth"
+					},
+					"authorization_request": {
+						"with_request_body": true
+					}
+				}
+			}`,
+			expectedErr: "requestMethod GET does not support with_request_body set to true",
+		},
+		{
+			name: "Missing Path for Forward Auth",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "forward_auth",
+					"endpoint": {
+						"service_name": "auth.example.com",
+						"service_port": 8080,
+						"service_host": "auth.example.com",
+						"request_method": "POST"
+					}
+				}
+			}`,
+			expectedErr: "when endpoint_mode is forward_auth, endpoint path must not be empty",
+		},
+		{
+			name: "Missing Path Prefix for Envoy",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "envoy",
+					"endpoint": {
+						"service_name": "example.com",
+						"service_port": 80
+					}
+				}
+			}`,
+			expectedErr: "when endpoint_mode is envoy, endpoint path_prefix must not be empty",
+		},
+		{
+			name: "Valid Match Rules with Blacklist",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "envoy",
+					"endpoint": {
+						"service_name": "example.com",
+						"service_port": 80,
+						"path_prefix": "/auth"
+					}
+				},
+				"match_type": "blacklist",
+				"match_list": [
+					{
+						"match_rule_domain": "*.bar.com",
+						"match_rule_path": "/headers",
+						"match_rule_type": "prefix"
+					}
+				]
+			}`,
+			expected: ExtAuthConfig{
+				HttpService: HttpService{
+					EndpointMode: "envoy",
+					Client: wrapper.NewClusterClient(wrapper.FQDNCluster{
+						FQDN: "example.com",
+						Port: 80,
+						Host: "",
+					}),
+					PathPrefix: "/auth",
+					Timeout:    1000,
+				},
+				MatchRules: expr.MatchRules{
+					Mode: "blacklist",
+					RuleList: []expr.Rule{
+						{
+							Domain: "*.bar.com",
+							Path: func() expr.Matcher {
+								pathMatcher, err := expr.BuildStringMatcher(expr.MatchPatternPrefix, "/headers", false)
+								if err != nil {
+									t.Fatalf("Failed to create Matcher: %v", err)
+								}
+								return pathMatcher
+							}(),
+						},
+					},
+				},
+				FailureModeAllow:          false,
+				FailureModeAllowHeaderAdd: false,
+				StatusOnError:             403,
+			},
+		},
+		{
+			name: "Valid Match Rules with Whitelist",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "envoy",
+					"endpoint": {
+						"service_name": "example.com",
+						"service_port": 80,
+						"path_prefix": "/auth"
+					}
+				},
+				"match_type": "whitelist",
+				"match_list": [
+					{
+						"match_rule_domain": "*.foo.com",
+						"match_rule_path": "/api",
+						"match_rule_type": "exact"
+					}
+				]
+			}`,
+			expected: ExtAuthConfig{
+				HttpService: HttpService{
+					EndpointMode: "envoy",
+					Client: wrapper.NewClusterClient(wrapper.FQDNCluster{
+						FQDN: "example.com",
+						Port: 80,
+						Host: "",
+					}),
+					PathPrefix: "/auth",
+					Timeout:    1000,
+				},
+				MatchRules: expr.MatchRules{
+					Mode: "whitelist",
+					RuleList: []expr.Rule{
+						{
+							Domain: "*.foo.com",
+							Path: func() expr.Matcher {
+								pathMatcher, err := expr.BuildStringMatcher(expr.MatchPatternExact, "/api", false)
+								if err != nil {
+									t.Fatalf("Failed to create Matcher: %v", err)
+								}
+								return pathMatcher
+							}(),
+						},
+					},
+				},
+				FailureModeAllow:          false,
+				FailureModeAllowHeaderAdd: false,
+				StatusOnError:             403,
+			},
+		},
+		{
+			name: "Missing Match Type",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "envoy",
+					"endpoint": {
+						"service_name": "example.com",
+						"service_port": 80,
+						"path_prefix": "/auth"
+					}
+				},
+				"match_list": [
+					{
+						"match_rule_domain": "*.bar.com",
+						"match_rule_path": "/headers",
+						"match_rule_type": "prefix"
+					}
+				]
+			}`,
+			expectedErr: "missing match_type in config",
+		},
+		{
+			name: "Invalid Match Type",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "envoy",
+					"endpoint": {
+						"service_name": "example.com",
+						"service_port": 80,
+						"path_prefix": "/auth"
+					}
+				},
+				"match_type": "invalid_type",
+				"match_list": [
+					{
+						"match_rule_domain": "*.bar.com",
+						"match_rule_path": "/headers",
+						"match_rule_type": "prefix"
+					}
+				]
+			}`,
+			expectedErr: "invalid match_type in config, must be 'whitelist' or 'blacklist'",
+		},
+		{
+			name: "Invalid Match Rule Type",
+			json: `{
+				"http_service": {
+					"endpoint_mode": "envoy",
+					"endpoint": {
+						"service_name": "example.com",
+						"service_port": 80,
+						"path_prefix": "/auth"
+					}
+				},
+				"match_type": "blacklist",
+				"match_list": [
+					{
+						"match_rule_domain": "*.bar.com",
+						"match_rule_path": "/headers",
+						"match_rule_type": "invalid_type"
+					}
+				]
+			}`,
+			expectedErr: `failed to build string matcher for rule with domain "*.bar.com", path "/headers", type "invalid_type": unknown string matcher type`,
+		},
 	}
-	return strings.HasPrefix(s, m.target)
-}
-
-type stringSuffixMatcher struct {
-	target     string
-	ignoreCase bool
-}
-
-func (m *stringSuffixMatcher) Match(s string) bool {
-	if m.ignoreCase {
-		return strings.HasSuffix(strings.ToLower(s), m.target)
-	}
-	return strings.HasSuffix(s, m.target)
-}
-
-type stringContainsMatcher struct {
-	target     string
-	ignoreCase bool
-}
-
-func (m *stringContainsMatcher) Match(s string) bool {
-	if m.ignoreCase {
-		return strings.Contains(strings.ToLower(s), m.target)
-	}
-	return strings.Contains(s, m.target)
-}
 
-type stringRegexMatcher struct {
-	regex *regexp.Regexp
-}
-
-func (m *stringRegexMatcher) Match(s string) bool {
-	return m.regex.MatchString(s)
-}
-
-type MatcherConstructor func(string, bool) (Matcher, error)
-
-var matcherConstructors = map[string]MatcherConstructor{
-	MatchPatternExact:    newStringExactMatcher,
-	MatchPatternPrefix:   newStringPrefixMatcher,
-	MatchPatternSuffix:   newStringSuffixMatcher,
-	MatchPatternContains: newStringContainsMatcher,
-	MatchPatternRegex:    newStringRegexMatcher,
-}
-
-func newStringExactMatcher(target string, ignoreCase bool) (Matcher, error) {
-	if ignoreCase {
-		target = strings.ToLower(target)
-	}
-	return &stringExactMatcher{target: target, ignoreCase: ignoreCase}, nil
-}
-
-func newStringPrefixMatcher(target string, ignoreCase bool) (Matcher, error) {
-	if ignoreCase {
-		target = strings.ToLower(target)
-	}
-	return &stringPrefixMatcher{target: target, ignoreCase: ignoreCase}, nil
-}
-
-func newStringSuffixMatcher(target string, ignoreCase bool) (Matcher, error) {
-	if ignoreCase {
-		target = strings.ToLower(target)
-	}
-	return &stringSuffixMatcher{target: target, ignoreCase: ignoreCase}, nil
-}
-
-func newStringContainsMatcher(target string, ignoreCase bool) (Matcher, error) {
-	if ignoreCase {
-		target = strings.ToLower(target)
-	}
-	return &stringContainsMatcher{target: target, ignoreCase: ignoreCase}, nil
-}
-
-func newStringRegexMatcher(target string, ignoreCase bool) (Matcher, error) {
-	if ignoreCase && !strings.HasPrefix(target, "(?i)") {
-		target = "(?i)" + target
-	}
-	re, err := regexp.Compile(target)
-	if err != nil {
-		return nil, err
-	}
-	return &stringRegexMatcher{regex: re}, nil
-}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var config ExtAuthConfig
+			result := gjson.Parse(tt.json)
+			err := ParseConfig(result, &config, &wrapper.DefaultLog{})
 
-func BuildStringMatcher(matchType, target string, ignoreCase bool) (Matcher, error) {
-	for constructorType, constructor := range matcherConstructors {
-		if constructorType == matchType {
-			return constructor(target, ignoreCase)
-		}
+			if tt.expectedErr != "" {
+				assert.EqualError(t, err, tt.expectedErr)
+			} else {
+				assert.NoError(t, err)
+				assert.Equal(t, tt.expected, config)
+			}
+		})
 	}
-	return nil, errors.New("unknown string matcher type")
 }