Update common_client_test.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: nikola-jokic

common_client_test.go

@@ -190,7 +190,11 @@ func TestWithLogger(t *testing.T) {
 		client, err := opts.newRetryableHTTPClient()
 		require.NoError(t, err)
 		assert.NotNil(t, client.Logger, "retryable client should have logger set from WithLogger(nil)")
-		assert.Equal(t, slog.DiscardHandler, opts.logger.Handler(), "retryable client logger should be a discard logger from WithLogger(nil)")
+
+		logger, ok := client.Logger.(*slog.Logger)
+		require.True(t, ok, "retryable client logger should be a *slog.Logger")
+		assert.Same(t, opts.logger, logger, "retryable client logger should be the same logger set by WithLogger(nil)")
+		assert.Equal(t, slog.DiscardHandler, logger.Handler(), "retryable client logger should be a discard logger from WithLogger(nil)")
 	})
 
 	t.Run("WithLogger(customLogger) propagates custom logger to retryable HTTP client", func(t *testing.T) {