Update DropwizardExportsTest.java

Signed-off-by: Kinshuk Bairagi <hi@kinsh.uk>

prometheus-metrics-instrumentation-dropwizard/src/test/java/io/prometheus/metrics/instrumentation/dropwizard/DropwizardExportsTest.java

@@ -3,6 +3,7 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.data.Offset.offset;
 import static org.junit.Assert.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
 import com.codahale.metrics.*;
 import io.prometheus.metrics.expositionformats.OpenMetricsTextFormatWriter;
@@ -25,7 +26,10 @@ class DropwizardExportsTest {
   @BeforeEach
   public void setUp() {
     metricRegistry = new MetricRegistry();
-    DropwizardExports.builder().dropwizardRegistry(metricRegistry).register(registry);
+    DropwizardExports.builder()
+        .dropwizardRegistry(metricRegistry)
+        .metricFilter(MetricFilter.ALL)
+        .register(registry);
   }
 
   @Test
@@ -35,6 +39,12 @@ public void testBuilderThrowsErrorOnNullRegistry() {
         () -> DropwizardExports.builder().dropwizardRegistry(null).register(registry));
   }
 
+  @Test
+  public void testBuilderCreatesOkay() {
+    assertDoesNotThrow(
+        () -> DropwizardExports.builder().dropwizardRegistry(metricRegistry).register());
+  }
+
   @Test
   public void testCounter() {
     metricRegistry.counter("foo.bar").inc(1);