test(ai-proxy): expand wasm integration tests, coverage, and provider matrix (#3790)

Signed-off-by: jingze <daijingze.djz@alibaba-inc.com>

plugins/wasm-go/extensions/ai-proxy/test/grok.go

@@ -0,0 +1,92 @@
+package test
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+
+	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
+	"github.com/higress-group/wasm-go/pkg/test"
+	"github.com/stretchr/testify/require"
+)
+
+var basicGrokConfig = func() json.RawMessage {
+	return LegacyProviderPluginJSON(map[string]interface{}{
+		"type":      "grok",
+		"apiTokens": []string{"xai-grok-test-key"},
+		"modelMapping": map[string]string{
+			"*": "grok-2-latest",
+		},
+	})
+}()
+
+var invalidGrokConfig = func() json.RawMessage {
+	return LegacyProviderPluginJSON(map[string]interface{}{
+		"type":         "grok",
+		"apiTokens":    []string{},
+		"modelMapping": map[string]string{"*": "grok-2-latest"},
+	})
+}()
+
+// RunGrokParseConfigTests exercises Grok plugin config loading.
+func RunGrokParseConfigTests(t *testing.T) {
+	test.RunGoTest(t, func(t *testing.T) {
+		t.Run("basic grok config", func(t *testing.T) {
+			host, status := test.NewTestHost(basicGrokConfig)
+			defer host.Reset()
+			require.Equal(t, types.OnPluginStartStatusOK, status)
+			config, err := host.GetMatchConfig()
+			require.NoError(t, err)
+			require.NotNil(t, config)
+		})
+		t.Run("invalid grok config missing apiToken", func(t *testing.T) {
+			host, status := test.NewTestHost(invalidGrokConfig)
+			defer host.Reset()
+			require.Equal(t, types.OnPluginStartStatusFailed, status)
+		})
+	})
+}
+
+// RunGrokOnHttpRequestHeadersTests exercises Grok request header transforms.
+func RunGrokOnHttpRequestHeadersTests(t *testing.T) {
+	test.RunTest(t, func(t *testing.T) {
+		t.Run("grok chat completions headers", func(t *testing.T) {
+			host, status := test.NewTestHost(basicGrokConfig)
+			defer host.Reset()
+			require.Equal(t, types.OnPluginStartStatusOK, status)
+
+			action := host.CallOnHttpRequestHeaders([][2]string{
+				{":authority", "example.com"},
+				{":path", "/v1/chat/completions"},
+				{":method", "POST"},
+				{"Content-Type", "application/json"},
+			})
+			require.Equal(t, types.HeaderStopIteration, action)
+
+			requestHeaders := host.GetRequestHeaders()
+			require.NotNil(t, requestHeaders)
+
+			hostValue, ok := test.GetHeaderValue(requestHeaders, ":authority")
+			require.True(t, ok)
+			require.Equal(t, "api.x.ai", hostValue)
+
+			authValue, ok := test.GetHeaderValue(requestHeaders, "Authorization")
+			require.True(t, ok)
+			require.Contains(t, authValue, "Bearer xai-grok-test-key")
+
+			pathValue, ok := test.GetHeaderValue(requestHeaders, ":path")
+			require.True(t, ok)
+			require.Equal(t, "/v1/chat/completions", pathValue)
+
+			debugLogs := host.GetDebugLogs()
+			found := false
+			for _, log := range debugLogs {
+				if strings.Contains(log, "grok") || strings.Contains(log, "ai-proxy") {
+					found = true
+					break
+				}
+			}
+			require.True(t, found, "expected ai-proxy or grok debug logs")
+		})
+	})
+}