Add unit tests for data sources and managers#101

MihaiCristianCondrea wants to merge 1 commit intomainMihaiCristianCondrea/Android-Studio-Tutorials-Java-Edition:mainfrom

codex/create-unit-tests-for-data-sources-and-managersMihaiCristianCondrea/Android-Studio-Tutorials-Java-Edition:codex/create-unit-tests-for-data-sources-and-managersCopy head branch name to clipboard