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/provider/streaming_extract_test.go

@@ -0,0 +1,51 @@
+package provider
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestExtractStreamingEvents(t *testing.T) {
+	t.Run("empty_chunk", func(t *testing.T) {
+		ctx := newMapCtx()
+		events := ExtractStreamingEvents(ctx, nil)
+		assert.Empty(t, events)
+	})
+
+	t.Run("crlf_normalized", func(t *testing.T) {
+		ctx := newMapCtx()
+		chunk := "event:msg\r\ndata:{\"k\":1}\r\n\r\n"
+		events := ExtractStreamingEvents(ctx, []byte(chunk))
+		require.NotEmpty(t, events)
+	})
+
+	t.Run("qwen_style_block", func(t *testing.T) {
+		ctx := newMapCtx()
+		chunk := "event:result\n:HTTP_STATUS/200\ndata:{\"output\":1}\n\n"
+		events := ExtractStreamingEvents(ctx, []byte(chunk))
+		require.NotEmpty(t, events)
+		foundData := false
+		for _, e := range events {
+			if strings.Contains(e.RawEvent, "data:") {
+				foundData = true
+			}
+		}
+		assert.True(t, foundData, "expected a data line in parsed events: %#v", events)
+	})
+
+	t.Run("split_chunk_buffers_incomplete", func(t *testing.T) {
+		ctx := newMapCtx()
+		part1 := []byte("event:a\n")
+		_ = ExtractStreamingEvents(ctx, part1)
+		buf, has := ctx.GetContext(ctxKeyStreamingBody).([]byte)
+		require.True(t, has, "expected streaming body buffer after incomplete chunk")
+		require.NotEmpty(t, buf)
+
+		part2 := []byte("data:{}\n\n")
+		events := ExtractStreamingEvents(ctx, part2)
+		require.NotEmpty(t, events)
+	})
+}