nim-ffi/tests/e2e/c/README.md

C end-to-end test

Builds the generated C bindings for the timer example (examples/timer/c_bindings) and drives them against the real Nim dylib, asserting on every response. Run it with:

nimble test_c_e2e

which regenerates the bindings, configures CMake, builds, and runs the test via ctest. The test program (test_timer_e2e.c) exercises the constructor, the sync and async methods, nested seq/Option payloads, multi-parameter requests, the error channel, and the typed event listener.

test_timer_e2e.c is hand-written (it is the consumer of the bindings, not a generated artifact). The bindings under examples/timer/c_bindings are generated and must not be edited by hand.