Add toString to reporters (open-telemetry#403)

Signed-off-by: Andrea Di Giorgi <[email protected]>

Author: Ithildir

src/reporters/composite_reporter.js

@@ -25,6 +25,10 @@ export default class CompositeReporter implements Reporter {
     return 'CompositeReporter';
   }
 
+  toString(): string {
+    return `${this.name()}(${this._reporters.map(reporter => reporter.toString()).join(',')})`;
+  }
+
   report(span: Span): void {
     this._reporters.forEach(r => {
       r.report(span);

src/reporters/in_memory_reporter.js

@@ -26,6 +26,10 @@ export default class InMemoryReporter implements Reporter {
     return 'InMemoryReporter';
   }
 
+  toString(): string {
+    return this.name();
+  }
+
   report(span: Span): void {
     this._spans.push(span);
   }

src/reporters/logging_reporter.js

@@ -29,6 +29,10 @@ export default class LoggingReporter implements Reporter {
     return 'LoggingReporter';
   }
 
+  toString(): string {
+    return this.name();
+  }
+
   close(callback?: () => void): void {
     if (callback) {
       callback();

src/reporters/noop_reporter.js

@@ -18,6 +18,10 @@ export default class NoopReporter implements Reporter {
     return 'NoopReporter';
   }
 
+  toString(): string {
+    return this.name();
+  }
+
   report(span: Span): void {}
 
   close(callback?: () => void): void {

src/reporters/remote_reporter.js

@@ -44,6 +44,10 @@ export default class RemoteReporter implements Reporter {
     return 'RemoteReporter';
   }
 
+  toString(): string {
+    return this.name();
+  }
+
   report(span: Span): void {
     const thriftSpan = ThriftUtils.spanToThrift(span);
     this._sender.append(thriftSpan, this._appendCallback);

test/all_reporters.js

@@ -48,6 +48,21 @@ describe('All Reporters should', () => {
     assert.equal(compositeReporter.name(), 'CompositeReporter');
   });
 
+  it('have proper toString', () => {
+    let loggingReporter = new LoggingReporter();
+    let inMemoryReporter = new InMemoryReporter();
+    inMemoryReporter.setProcess('service-name', []);
+    let noopReporter = new NoopReporter();
+    let remoteReporter = new RemoteReporter(new UDPSender());
+    let compositeReporter = new CompositeReporter([loggingReporter, inMemoryReporter]);
+
+    assert.equal(loggingReporter.toString(), 'LoggingReporter');
+    assert.equal(inMemoryReporter.toString(), 'InMemoryReporter');
+    assert.equal(noopReporter.toString(), 'NoopReporter');
+    assert.equal(remoteReporter.toString(), 'RemoteReporter');
+    assert.equal(compositeReporter.toString(), 'CompositeReporter(LoggingReporter,InMemoryReporter)');
+  });
+
   let closeOptions = [
     {
       callback: sinon.spy(),