--- title: Have you ever had formatting or text unit tests suddenly... description: Formatter string tests usually fail months after the mistake. Book a mentoring session → https://rebeloper.com/mentoring #rebeloper #DateFormatter... canonical: https://daily.dev/posts/have-you-ever-had-formatting-or-text-unit-tests-suddenly-fail-after-a-minor-ios-update--borwlivko twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Have you ever had formatting or text unit tests suddenly fail after a minor iOS update? | daily.dev og:description: Formatter string tests usually fail months after the mistake. Book a mentoring session → https://rebeloper.com/mentoring #rebeloper #DateFormatter... og:url: https://daily.dev/posts/have-you-ever-had-formatting-or-text-unit-tests-suddenly-fail-after-a-minor-ios-update--borwlivko og:image: https://api.daily.dev/og/posts/BoRWLIvKO.png og:image:alt: Have you ever had formatting or text unit tests suddenly fail after a minor iOS update? og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Have you ever had formatting or text unit tests suddenly fail after a minor iOS update? **[Rebeloper](https://daily.dev/sources/rebeloper)** · 1 min read · 0 upvotes · 0 comments ## Summary Formatter string tests usually fail months after the mistake. Book a mentoring session → https://rebeloper.com/mentoring #rebeloper #DateFormatter #NumberFormatter #Locale #TimeZone ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- [View this post on daily.dev](https://daily.dev/posts/have-you-ever-had-formatting-or-text-unit-tests-suddenly-fail-after-a-minor-ios-update--borwlivko) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Have you ever had formatting or text unit tests suddenly fail after a minor iOS update?","url":"https://daily.dev/posts/have-you-ever-had-formatting-or-text-unit-tests-suddenly-fail-after-a-minor-ios-update--borwlivko","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/have-you-ever-had-formatting-or-text-unit-tests-suddenly-fail-after-a-minor-ios-update--borwlivko"},"datePublished":"2026-01-24T06:02:05.341Z","dateModified":"2026-01-24T07:49:07.200Z","description":"Formatter string tests usually fail months after the mistake.\n\nBook a mentoring session → https://rebeloper.com/mentoring\n\n#rebeloper #DateFormatter...","image":"https://i.ytimg.com/vi/1pKRZtjUC5k/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/1pKRZtjUC5k/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Rebeloper","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Rebeloper","logo":"https://media.daily.dev/image/upload/s--W0sZL8K4--/f_auto/v1726990075/logos/rebeloper","url":"https://daily.dev/sources/rebeloper"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/have-you-ever-had-formatting-or-text-unit-tests-suddenly-fail-after-a-minor-ios-update--borwlivko","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"","timeRequired":"PT1M","video":{"@type":"VideoObject","name":"Have you ever had formatting or text unit tests suddenly fail after a minor iOS update?","description":"Formatter string tests usually fail months after the mistake.\n\nBook a mentoring session → https://rebeloper.com/mentoring\n\n#rebeloper #DateFormatter...","thumbnailUrl":"https://i.ytimg.com/vi/1pKRZtjUC5k/sddefault.jpg","uploadDate":"2026-01-24T06:02:05.341Z","duration":"PT1M","url":"https://api.daily.dev/r/BoRWLIvKO","embedUrl":"https://www.youtube.com/embed/1pKRZtjUC5k"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Rebeloper","item":"https://daily.dev/sources/rebeloper"},{"@type":"ListItem","position":3,"name":"Have you ever had formatting or text unit tests suddenly fail after a minor iOS update?"}]} ```