Trace loggging: Check for g_event_logger is not null before calling it.
BUG=webrtc:7868
Review-Url: https://codereview.webrtc.org/2961663002
Cr-Commit-Position: refs/heads/master@{#18933}
diff --git a/webrtc/sdk/objc/Framework/UnitTests/RTCTracingTest.mm b/webrtc/sdk/objc/Framework/UnitTests/RTCTracingTest.mm
new file mode 100644
index 0000000..ec3e226
--- /dev/null
+++ b/webrtc/sdk/objc/Framework/UnitTests/RTCTracingTest.mm
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#import <Foundation/Foundation.h>
+
+#include <vector>
+
+#include "webrtc/base/gunit.h"
+
+#import "NSString+StdString.h"
+#import "WebRTC/RTCTracing.h"
+
+@interface RTCTracingTest : NSObject
+- (void)tracingTestNoInitialization;
+@end
+
+@implementation RTCTracingTest
+
+- (NSString *)documentsFilePathForFileName:(NSString *)fileName {
+ NSParameterAssert(fileName.length);
+ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
+ NSString *documentsDirPath = paths.firstObject;
+ NSString *filePath =
+ [documentsDirPath stringByAppendingPathComponent:fileName];
+ return filePath;
+}
+
+- (void)tracingTestNoInitialization {
+ NSString *filePath = [self documentsFilePathForFileName:@"webrtc-trace.txt"];
+ EXPECT_EQ(NO, RTCStartInternalCapture(filePath));
+ RTCStopInternalCapture();
+}
+
+@end
+
+
+TEST(RTCTracingTest, TracingTestNoInitialization) {
+ @autoreleasepool {
+ RTCTracingTest *test = [[RTCTracingTest alloc] init];
+ [test tracingTestNoInitialization];
+ }
+}
+