Fix for Issue#11 increase test coverage for jaeger-jaxrs2 tests

jaeger-jaxrs2/src/test/java/com/uber/jaeger/filters/jaxrs2/ClientFilterTest.java

@@ -22,7 +22,10 @@
 
 package com.uber.jaeger.filters.jaxrs2;
 
+import static com.uber.jaeger.filters.jaxrs2.Constants.CURRENT_SPAN_CONTEXT_KEY;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
 import static org.mockito.Mockito.when;
 
 import com.uber.jaeger.Span;
@@ -84,6 +87,8 @@ public void testFilter() throws Exception {
 
     undertest.filter(clientRequestContext);
 
+    assertNull(clientRequestContext.getProperty(CURRENT_SPAN_CONTEXT_KEY));
+
     ArgumentCaptor<String> stringCaptor = ArgumentCaptor.forClass(String.class);
     ArgumentCaptor<Object> objectCaptor = ArgumentCaptor.forClass(Object.class);
 
@@ -94,6 +99,8 @@ public void testFilter() throws Exception {
 
     undertest.filter(clientRequestContext, clientResponseContext);
 
+    assertNotNull(clientRequestContext.getProperty(CURRENT_SPAN_CONTEXT_KEY));
+
     List<Span> spans = reporter.getSpans();
     Map<String, Object> tags = spans.get(0).getTags();
     assertEquals(200, tags.get(Tags.HTTP_STATUS.getKey()));

jaeger-jaxrs2/src/test/java/com/uber/jaeger/filters/jaxrs2/ServerFilterTest.java

@@ -99,5 +99,13 @@ public void filter() throws Exception {
     assertEquals(Tags.SPAN_KIND_SERVER, tags.get(Tags.SPAN_KIND.getKey()));
     assertEquals(uri.toString(), tags.get(Tags.HTTP_URL.getKey()));
     assertEquals("localhost", tags.get(Tags.PEER_HOSTNAME.getKey()));
+
+
+    // Exercise catch blocks on filter methods for code coverage
+    undertest.filter(null);
+
+    // For filter(requestContext, responseContext) we first need to make sure there's something in the traceContext
+    undertest.filter(containerRequestContext);
+    undertest.filter(containerRequestContext, null);
   }
 }