test(ai-prompt-decorator): drop wasm host from regex helper test

The "regex rule supports capture references" subtest only exercises the
applyReplaceRulesToContent helper on rules that parseConfig has compiled.
Going through test.RunTest and host.GetMatchConfig in wasm mode requires
an active common HTTP context, which the helper subtest never sets up,
so CI failed with "http context is not a common http context" once a
main.wasm artifact was present.

Call parseConfig directly with gjson.ParseBytes to compile the regex
rule and assert against the helper. This keeps the test focused on the
helper logic and behaves identically in `go test` and CI regardless of
whether main.wasm is built.

Author: johnlanni

plugins/wasm-go/extensions/ai-prompt-decorator/main_test.go

@@ -22,6 +22,7 @@ import (
 	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
 	"github.com/higress-group/wasm-go/pkg/test"
 	"github.com/stretchr/testify/require"
+	"github.com/tidwall/gjson"
 )
 
 // 测试配置：基础装饰器配置
@@ -754,8 +755,11 @@ func TestApplyReplaceRulesToContent(t *testing.T) {
 	})
 
 	t.Run("regex rule supports capture references", func(t *testing.T) {
-		// parseConfig is normally responsible for compiling, so do it here too.
-		cfgJSON, _ := json.Marshal(map[string]interface{}{
+		// parseConfig is what compiles the regex in production, so call it
+		// directly here instead of going through the wasm test host. This
+		// keeps the helper-level test independent of the wasm runtime so it
+		// behaves the same in `go test` and CI.
+		cfgJSON, err := json.Marshal(map[string]interface{}{
 			"prepend": []map[string]interface{}{},
 			"append":  []map[string]interface{}{},
 			"replace": []map[string]interface{}{
@@ -766,14 +770,10 @@ func TestApplyReplaceRulesToContent(t *testing.T) {
 				},
 			},
 		})
-		test.RunTest(t, func(t *testing.T) {
-			host, status := test.NewTestHost(json.RawMessage(cfgJSON))
-			defer host.Reset()
-			require.Equal(t, types.OnPluginStartStatusOK, status)
-			cfg, err := host.GetMatchConfig()
-			require.NoError(t, err)
-			decoratorConfig := cfg.(*AIPromptDecoratorConfig)
-			require.Equal(t, "hi world", applyReplaceRulesToContent("user", "hello world", decoratorConfig.Replace))
-		})
+		require.NoError(t, err)
+
+		var cfg AIPromptDecoratorConfig
+		require.NoError(t, parseConfig(gjson.ParseBytes(cfgJSON), &cfg))
+		require.Equal(t, "hi world", applyReplaceRulesToContent("user", "hello world", cfg.Replace))
 	})
 }