#![allow(unused_assignments)] //@ failure-status: 101 fn might_fail_assert(one_plus_one: u32) { println!("does 1 + 1 = {}?", one_plus_one); assert_eq!(1 + 1, one_plus_one, "the argument was wrong"); } fn main() -> Result<(), u8> { let mut countdown = 10; while countdown > 0 { if countdown == 1 { might_fail_assert(3); } else if countdown < 5 { might_fail_assert(2); } countdown -= 1; } Ok(()) } // Notes: // 1. Compare this program and its coverage results to those of the very similar test // `panic_unwind.rs`, and similar tests `abort.rs` and `try_error_result.rs`. // 2. This test confirms the coverage generated when a program passes or fails an `assert!()` or // related `assert_*!()` macro. // 3. Notably, the `assert` macros *do not* generate `TerminatorKind::Assert`. The macros produce // conditional expressions, `TerminatorKind::SwitchInt` branches, and a possible call to // `begin_panic_fmt()` (that begins a panic unwind, if the assertion test fails). // 4. `TerminatoKind::Assert` is, however, also present in the MIR generated for this test // (and in many other coverage tests). The `Assert` terminator is typically generated by the // Rust compiler to check for runtime failures, such as numeric overflows.