Attempt to fix intermittent failing Crashlytics settings tests in CI (#5107)

Author: jasonhu-g

Crashlytics/UnitTests/FIRCLSSettingsTests.m

@@ -49,6 +49,12 @@
 NSString *const TestGoogleAppID = @"1:test:google:app:id";
 NSString *const TestChangedGoogleAppID = @"2:changed:google:app:id";
 
+@interface FIRCLSSettings (Testing)
+
+@property(nonatomic, strong) NSDictionary<NSString *, id> *settingsDictionary;
+
+@end
+
 @interface FIRCLSSettingsTests : XCTestCase
 
 @property(nonatomic, retain) FIRCLSMockFileManager *fileManager;
@@ -75,6 +81,10 @@ - (void)setUp {
   _settings = [[FIRCLSSettings alloc] initWithFileManager:_fileManager appIDModel:_appIDModel];
 }
 
+- (void)tearDown {
+  [_fileManager removeContentsOfDirectoryAtPath:_fileManager.settingsDirectoryPath];
+}
+
 - (void)testDefaultSettings {
   XCTAssertEqual(self.settings.isCacheExpired, YES);
 
@@ -431,8 +441,10 @@ - (void)testNewReportEndpointSettings {
   [self writeSettings:settingsJSON error:&error];
   NSTimeInterval currentTimestamp = [NSDate timeIntervalSinceReferenceDate];
   [self.settings cacheSettingsWithGoogleAppID:TestGoogleAppID currentTimestamp:currentTimestamp];
-
   XCTAssertNil(error, "%@", error);
+
+  XCTAssertNotNil(self.settings.settingsDictionary);
+  NSLog(@"[Debug Log] %@", self.settings.settingsDictionary);
   XCTAssertTrue(self.settings.shouldUseNewReportEndpoint);
 }