Define constant variables for multiple {errors, exceptions} userInfo keys

Created by: chuganzy

Bolts/Common/BFTask.h

@@ -29,6 +29,18 @@ extern NSInteger const kBFMultipleErrorsError;
  */
 extern NSString *const BFTaskMultipleExceptionsException;
 
+/*!
+ An error userInfo key used if there were multiple errors on <BFTask taskForCompletionOfAllTasks:>.
+ Value type is `NSArray<NSError *> *`.
+ */
+extern NSString *const BFTaskMultipleErrorsUserInfoKey;
+
+/*!
+ An error userInfo key used if there were multiple exceptions on <BFTask taskForCompletionOfAllTasks:>.
+ Value type is `NSArray<NSException *> *`.
+ */
+extern NSString *const BFTaskMultipleExceptionsUserInfoKey;
+
 @class BFExecutor;
 @class BFTask;
 

Bolts/Common/BFTask.m

@@ -25,6 +25,9 @@ NSString *const BFTaskErrorDomain = @"bolts";
 NSInteger const kBFMultipleErrorsError = 80175001;
 NSString *const BFTaskMultipleExceptionsException = @"BFMultipleExceptionsException";
 
+NSString *const BFTaskMultipleErrorsUserInfoKey = @"errors";
+NSString *const BFTaskMultipleExceptionsUserInfoKey = @"exceptions";
+
 @interface BFTask () {
     id _result;
     NSError *_error;
@@ -144,7 +147,7 @@ NSString *const BFTaskMultipleExceptionsException = @"BFMultipleExceptionsExcept
                         NSException *exception =
                         [NSException exceptionWithName:BFTaskMultipleExceptionsException
                                                 reason:@"There were multiple exceptions."
-                                              userInfo:@{ @"exceptions": exceptions }];
+                                              userInfo:@{ BFTaskMultipleExceptionsUserInfoKey: exceptions }];
                         tcs.exception = exception;
                     }
                 } else if (errors.count > 0) {
@@ -153,7 +156,7 @@ NSString *const BFTaskMultipleExceptionsException = @"BFMultipleExceptionsExcept
                     } else {
                         NSError *error = [NSError errorWithDomain:BFTaskErrorDomain
                                                              code:kBFMultipleErrorsError
-                                                         userInfo:@{ @"errors": errors }];
+                                                         userInfo:@{ BFTaskMultipleErrorsUserInfoKey: errors }];
                         tcs.error = error;
                     }
                 } else if (cancelled > 0) {

BoltsTests/TaskTests.m

@@ -399,7 +399,7 @@
 
         XCTAssertEqualObjects(@"BFMultipleExceptionsException", task.exception.name);
 
-        NSArray *exceptions = [task.exception.userInfo objectForKey:@"exceptions"];
+        NSArray *exceptions = [task.exception.userInfo objectForKey:BFTaskMultipleExceptionsUserInfoKey];
         XCTAssertEqual(2, (int)exceptions.count);
         XCTAssertEqualObjects(@"TestException", [[exceptions objectAtIndex:0] name]);
         XCTAssertEqualObjects(@"TestException", [[exceptions objectAtIndex:1] name]);
@@ -474,7 +474,7 @@
         XCTAssertEqualObjects(@"bolts", task.error.domain);
         XCTAssertEqual(kBFMultipleErrorsError, task.error.code);
 
-        NSArray *errors = [task.error.userInfo objectForKey:@"errors"];
+        NSArray *errors = [task.error.userInfo objectForKey:BFTaskMultipleErrorsUserInfoKey];
         XCTAssertEqualObjects(@"BoltsTests", [[errors objectAtIndex:0] domain]);
         XCTAssertEqual(35, (int)[[errors objectAtIndex:0] code]);
         XCTAssertEqualObjects(@"BoltsTests", [[errors objectAtIndex:1] domain]);