feat: gamemaster

gamemaster/internal/adapters/redisstate/streamoffsets/store_test.go

@@ -0,0 +1,93 @@
+package streamoffsets_test
+
+import (
+	"context"
+	"testing"
+
+	"galaxy/gamemaster/internal/adapters/redisstate"
+	"galaxy/gamemaster/internal/adapters/redisstate/streamoffsets"
+
+	"github.com/alicebob/miniredis/v2"
+	"github.com/redis/go-redis/v9"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func newOffsetStore(t *testing.T) (*streamoffsets.Store, *miniredis.Miniredis) {
+	t.Helper()
+	server := miniredis.RunT(t)
+	client := redis.NewClient(&redis.Options{Addr: server.Addr()})
+	t.Cleanup(func() { _ = client.Close() })
+
+	store, err := streamoffsets.New(streamoffsets.Config{Client: client})
+	require.NoError(t, err)
+	return store, server
+}
+
+func TestNewRejectsNilClient(t *testing.T) {
+	_, err := streamoffsets.New(streamoffsets.Config{})
+	require.Error(t, err)
+}
+
+func TestLoadMissingReturnsNotFound(t *testing.T) {
+	store, _ := newOffsetStore(t)
+	id, found, err := store.Load(context.Background(), "health_events")
+	require.NoError(t, err)
+	assert.False(t, found)
+	assert.Empty(t, id)
+}
+
+func TestSaveLoadRoundTrip(t *testing.T) {
+	store, server := newOffsetStore(t)
+
+	const entryID = "1700000000000-0"
+	require.NoError(t, store.Save(context.Background(), "health_events", entryID))
+
+	id, found, err := store.Load(context.Background(), "health_events")
+	require.NoError(t, err)
+	assert.True(t, found)
+	assert.Equal(t, entryID, id)
+
+	// Verify the namespace prefix lands as expected.
+	expectedKey := redisstate.Keyspace{}.StreamOffset("health_events")
+	assert.True(t, server.Exists(expectedKey),
+		"key %q must exist after Save", expectedKey)
+}
+
+func TestSaveOverwritesPreviousValue(t *testing.T) {
+	store, _ := newOffsetStore(t)
+
+	require.NoError(t, store.Save(context.Background(), "health_events", "1-0"))
+	require.NoError(t, store.Save(context.Background(), "health_events", "2-0"))
+
+	id, found, err := store.Load(context.Background(), "health_events")
+	require.NoError(t, err)
+	assert.True(t, found)
+	assert.Equal(t, "2-0", id)
+}
+
+func TestSaveRejectsBadInputs(t *testing.T) {
+	store, _ := newOffsetStore(t)
+
+	require.Error(t, store.Save(context.Background(), "", "1-0"))
+	require.Error(t, store.Save(context.Background(), "health_events", ""))
+	//nolint:staticcheck // intentional nil ctx test
+	require.Error(t, store.Save(nil, "health_events", "1-0"))
+}
+
+func TestLoadRejectsBadInputs(t *testing.T) {
+	store, _ := newOffsetStore(t)
+
+	_, _, err := store.Load(context.Background(), "")
+	require.Error(t, err)
+	//nolint:staticcheck // intentional nil ctx test
+	_, _, err = store.Load(nil, "health_events")
+	require.Error(t, err)
+}
+
+func TestNilStoreOperationsRejected(t *testing.T) {
+	var store *streamoffsets.Store
+	_, _, err := store.Load(context.Background(), "health_events")
+	require.Error(t, err)
+	require.Error(t, store.Save(context.Background(), "health_events", "1-0"))
+}