XCTAssertEqual error: (“3”) is not equal to (“3”)

Question

NSMutableArray *arr = [NSMutableArray array];
[arr addObject:@\"1\"];
[arr addObject:@\"2\"];
[arr addObject:@\"3\"];

// This statement is fine.
XCTAssertTrue(arr.c         


        

Answer 1

I have had this problem, too. As @ephemera and @napier indicated, this is a type issue.

It can be solved by supplying a value of the correct type, using the c-literal modifiers.

XCTAssertEqual(arr.count, 3ul, @"Wrong array size.");

You can find the correct type by looking up the return type of the function used on the left hand side - ALT-click on arr.count:

- (NSUInteger)count;

Now ALT-click on NSUInteger to find its type:

typedef unsigned long NSUInteger;

Now find the c literal numeric format for unsigned long - google is a good friend but this page works:

http://www.tutorialspoint.com/cprogramming/c_constants.htm

As a quick hint here, you may need to use U (unsigned) L (long) or F (float), and make sure you write 1.0 instead of 1 to get a double. Lowercase also works, as in my example above.