kcmoffat

#import <XCTest/XCTest.h>
#import <Firebase/Firebase.h>

- (void)testGeneratePushId
{
    Firebase *ref = [[Firebase alloc] initWithUrl:@"INSERT SOME FIREBASE URL HERE"];
    
    NSMutableSet *set = [NSMutableSet set];
    NSMutableArray *pushIds = [NSMutableArray array];
    for (int i = 0; i < 100000; i++) {

kcmoffat

/**
 * Based on https://gist.github.com/mikelehen/3596a30bd69384624c11#file-generate-pushid-js
 *
 * Fancy ID generator that creates 20-character string identifiers with the following properties:
 *
 * 1. They're based on timestamp so that they sort *after* any existing ids.
 * 2. They contain 72-bits of random data after the timestamp so that IDs won't collide with other clients' IDs.
 * 3. They sort *lexicographically* (so the timestamp is converted to characters that will sort properly).
 * 4. They're monotonically increasing.  Even if you generate more than one in the same timestamp, the
 *    latter ones will sort after the former ones.  We do this by using the previous random bits