Fix tests

ads/ads_example_test.go

@@ -18,7 +18,7 @@ func ExampleParseRemainingChunksFromNonce() {
 		}
 		responses = append(responses, res)
 
-		if ads.ParseRemainingChunksFromNonce(res.Nonce) == 0 {
+		if remaining, _ := ads.ParseRemainingChunksFromNonce(res.Nonce); remaining == 0 {
 			break
 		}
 	}

internal/server/handlers_delta_test.go

@@ -127,7 +127,9 @@ func TestDeltaHandlerChunking(t *testing.T) {
 		require.Len(t, responses, expectedChunks)
 		expectedRemainingChunks := 0
 		for _, res := range slices.Backward(responses) {
-			require.Equal(t, expectedRemainingChunks, ads.ParseRemainingChunksFromNonce(res.Nonce))
+			remaining, err := ads.ParseRemainingChunksFromNonce(res.Nonce)
+			require.NoError(t, err)
+			require.Equal(t, expectedRemainingChunks, remaining)
 			expectedRemainingChunks++
 		}
 		return responses

internal/utils/utils_test.go

@@ -54,14 +54,19 @@ func TestNewNonce(t *testing.T) {
 		for _, expected := range []int{0, 42} {
 			nonce := newNonce(now, expected)
 			require.Equal(t, fmt.Sprintf("%x%08x", now.UnixNano(), expected), nonce)
-			actualRemainingChunks := ads.ParseRemainingChunksFromNonce(nonce)
+			actualRemainingChunks, err := ads.ParseRemainingChunksFromNonce(nonce)
+			require.NoError(t, err)
 			require.Equal(t, expected, actualRemainingChunks)
 		}
 	})
 	t.Run("badNonce", func(t *testing.T) {
-		require.Zero(t, ads.ParseRemainingChunksFromNonce("foo"))
+		remaining, err := ads.ParseRemainingChunksFromNonce("foo")
+		require.Error(t, err)
+		require.Zero(t, remaining)
 	})
 	t.Run("oldNonce", func(t *testing.T) {
-		require.Zero(t, ads.ParseRemainingChunksFromNonce(fmt.Sprintf("%x", now.UnixNano())))
+		remaining, err := ads.ParseRemainingChunksFromNonce(fmt.Sprintf("%x", now.UnixNano()))
+		require.Error(t, err)
+		require.Zero(t, remaining)
 	})
 }