feat: add PollRange

poll_batch_test.go

@@ -0,0 +1,82 @@
+package k2v_test
+
+import (
+	k2v "code.notaphish.fyi/milas/garage-k2v-go"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"net/http/httptrace"
+	"strconv"
+	"testing"
+	"time"
+)
+
+func TestClient_PollRange(t *testing.T) {
+	t.Parallel()
+
+	f, ctx := newFixture(t)
+
+	pk := randomPk()
+	sk := randomSk()
+
+	for i := range 5 {
+		err := f.cli.InsertItem(ctx, f.bucket, pk, sk+"-"+strconv.Itoa(i), "", []byte("hello1"))
+		require.NoError(t, err)
+	}
+
+	// first read should complete immediately
+	q := k2v.PollRangeQuery{
+		Start: sk,
+	}
+	result, err := f.cli.PollRange(ctx, f.bucket, pk, q, 5*time.Second)
+	require.NoError(t, err)
+	require.NotEmpty(t, result.SeenMarker)
+	require.Len(t, result.Items, 5)
+	for i := range result.Items {
+		require.Len(t, result.Items[i].Values, 1)
+		require.Equal(t, "hello1", string(result.Items[i].Values[0]))
+	}
+
+	updateErrCh := make(chan error, 1)
+	pollReadyCh := make(chan struct{})
+	go func(sk string, ct k2v.CausalityToken) {
+		defer close(updateErrCh)
+		select {
+		case <-ctx.Done():
+			t.Errorf("Context canceled: %v", ctx.Err())
+			return
+		case <-pollReadyCh:
+			t.Logf("PollRange connected")
+		}
+		updateErrCh <- f.cli.InsertItem(ctx, f.bucket, pk, sk, ct, []byte("hello2"))
+	}(result.Items[3].SortKey, k2v.CausalityToken(result.Items[3].CausalityToken))
+
+	trace := &httptrace.ClientTrace{
+		WroteRequest: func(_ httptrace.WroteRequestInfo) {
+			pollReadyCh <- struct{}{}
+		},
+	}
+
+	q.SeenMarker = result.SeenMarker
+	result, err = f.cli.PollRange(httptrace.WithClientTrace(ctx, trace), f.bucket, pk, q, 5*time.Second)
+	if assert.NoError(t, err) {
+		require.NotEmpty(t, result.SeenMarker)
+		require.Len(t, result.Items, 1)
+		require.Len(t, result.Items[0].Values, 1)
+		require.Equal(t, sk+"-3", result.Items[0].SortKey)
+		require.Equal(t, "hello2", string(result.Items[0].Values[0]))
+	}
+	require.NoError(t, <-updateErrCh)
+
+	require.NoError(t, err)
+	require.NoError(t, f.cli.InsertItem(ctx, f.bucket, pk, result.Items[0].SortKey, k2v.CausalityToken(result.Items[0].CausalityToken), []byte("hello3")))
+
+	q.SeenMarker = result.SeenMarker
+	result, err = f.cli.PollRange(ctx, f.bucket, pk, q, 5*time.Second)
+	if assert.NoError(t, err) {
+		require.NotEmpty(t, result.SeenMarker)
+		require.Len(t, result.Items, 1)
+		require.Len(t, result.Items[0].Values, 1)
+		require.Equal(t, sk+"-3", result.Items[0].SortKey)
+		require.Equal(t, "hello3", string(result.Items[0].Values[0]))
+	}
+}