/** Test of buildSpan method, of class AbstractTracer. */
@Test
public void testBuildSpan() {
System.out.println("buildSpan");
String operationName = "test-build-span-operation-name";
AbstractTracer instance = new TestTracerImpl();
Tracer.SpanBuilder result = instance.buildSpan(operationName);
AbstractSpan span = (AbstractSpan) result.start();
assertNotNull("Expected to create a valid Span", span);
assertEquals("Expected to create a Span with operationName", operationName, span.operationName);
}
/** Test of extract method, of class AbstractTracer, with an empty carrier. */
@Test
public void testEmptyExtract() {
System.out.println("empty extract");
AbstractTracer instance = new TestTracerImpl();
instance.register(TextMap.class, new TestTextMapExtractorImpl());
Map<String, String> map = Collections.singletonMap("garbageEntry", "garbageVal");
TextMap carrier = new TextMapExtractAdapter(map);
SpanContext emptyResult = instance.extract(Format.Builtin.TEXT_MAP, carrier);
assertNull("Should be nothing to extract", emptyResult);
}
/** Test of extract method, of class AbstractTracer, with a valid carrier. */
@Test
public void testNonEmptyExtract() {
System.out.println("non-empty extract");
AbstractTracer instance = new TestTracerImpl();
instance.register(TextMap.class, new TestTextMapExtractorImpl());
Map<String, String> map = Collections.singletonMap("test-marker", "whatever");
TextMap carrier = new TextMapExtractAdapter(map);
SpanContext result = instance.extract(Format.Builtin.TEXT_MAP, carrier);
assertNotNull("Should be something to extract", result);
assertEquals("Should find the marker", "whatever", ((TestSpanContextImpl) result).getMarker());
}
/** Test of inject method, of class AbstractTracer. */
@Test
public void testInject() {
System.out.println("inject");
AbstractTracer instance = new TestTracerImpl();
instance.register(TextMap.class, new TestTextMapInjectorImpl());
String operationName = "test-inject-span";
Span span =
new AbstractSpan(operationName) {
SpanContext spanContext = new TestSpanContextImpl("whatever");
@Override
public SpanContext context() {
return spanContext;
}
};
Map<String, String> map = new HashMap<>();
TextMap carrier = new TextMapInjectAdapter(map);
instance.inject(span.context(), Format.Builtin.TEXT_MAP, carrier);
assertEquals("marker should have been injected into map", "whatever", map.get("test-marker"));
}