Get all Objective-C classes containing a matching string in the class name

gistfile1.m

#import <objc/runtime.h>
#import <objc/message.h>

Class* getClassesFromClassList () {
    
    int numClasses = objc_getClassList(nil, 0);
    Class *classes = (__unsafe_unretained Class *)malloc(sizeof(Class) * numClasses);
    
    return classes;
    
}

BOOL classContainsTestSuffix (Class class) {
    
    const char *classNameC = class_getName(class);
    NSString *className = [NSString stringWithFormat:@"%s", classNameC];
    
    return [className containsString:@"_JETest"];
    
}

NSArray* getTestClasses () {
    
    int numClasses = objc_getClassList(nil, 0);
    Class *classes = getClassesFromClassList();
    
    NSMutableArray *classArr = [[NSMutableArray alloc] init];
    
    for (int i = 0 ; i < numClasses ; i++) {
        
        Class class = classes[i];
        
        if ( classContainsTestSuffix(class) ) {
            [classArr addObject:class];
        }
        
    }
    
    free(classes);
    
    return classArr;
    
}

void runTestClasses () {
    
    NSArray *testClasses = getTestClasses();
    
    for ( int i = 0 ; i < [testClasses count] ; i++) {
        
        Class testClass = [testClasses objectAtIndex:i];
        
        objc_msgSend(testClass, @selector(test));
        
    }
    
}