https://datatweets.com/courses/software-engineering/capstone/Recent content in Capstone on DATATWEETSHugoenCopyright (c) 2025 DatatweetsSun, 05 Jul 2026 09:00:00 +0200https://datatweets.com/courses/software-engineering/capstone/lesson-1-guided-project-ledgerly-end-to-end/Sun, 05 Jul 2026 09:00:00 +0200https://datatweets.com/courses/software-engineering/capstone/lesson-1-guided-project-ledgerly-end-to-end/This capstone project builds one new Ledgerly feature, prorated mid-cycle subscription plan upgrades, by drawing on all four modules of the course. A composed ProrationCalculator using the Strategy pattern for rounding produces a verified $15.48 charge for a Basic-to-Pro upgrade with 16 of 31 days remaining, and a verified $16.07 charge for a Pro-to-Enterprise upgrade with 9 of 28 days remaining, backed by five passing unit tests and one Gherkin scenario. The project closes with a CI and security note: the plan price is always read from Ledgerly’s own catalog, never accepted from a client.