Android Screenshot Testing on JVM

Overview

Render real Android pages and capture pixel-accurate screenshots entirely on JVM — no emulator, no device. Uses Robolectric (native graphics) + MockWebServer to exercise the full code stack (Fragment/Activity → ViewModel → Repository → Retrofit → OkHttp) while only faking HTTP responses at the network boundary.

Core principle: Mock at the lowest possible layer. All your Kotlin/Java code runs for real. Only the bytes coming back from the wire are fake.

Why This Approach

The problem with traditional Android UI testing