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1| |#![allow(unused_assignments)]
2| |// expect-exit-status-101
3| |
4| 4|fn might_fail_assert(one_plus_one: u32) {
5| 4| println!("does 1 + 1 = {}?", one_plus_one);
6| 4| assert_eq!(1 + 1, one_plus_one, "the argument was wrong");
^1
7| 3|}
8| |
9| 1|fn main() -> Result<(),u8> {
10| 1| let mut countdown = 10;
11| 11| while countdown > 0 {
12| 11| if countdown == 1 {
13| 1| might_fail_assert(3);
14| 10| } else if countdown < 5 {
15| 3| might_fail_assert(2);
16| 6| }
17| 10| countdown -= 1;
18| | }
19| 0| Ok(())
20| 0|}
21| |
22| |// Notes:
23| |// 1. Compare this program and its coverage results to those of the very similar test
24| |// `panic_unwind.rs`, and similar tests `abort.rs` and `try_error_result.rs`.
25| |// 2. This test confirms the coverage generated when a program passes or fails an `assert!()` or
26| |// related `assert_*!()` macro.
27| |// 3. Notably, the `assert` macros *do not* generate `TerminatorKind::Assert`. The macros produce
28| |// conditional expressions, `TerminatorKind::SwitchInt` branches, and a possible call to
29| |// `begin_panic_fmt()` (that begins a panic unwind, if the assertion test fails).
30| |// 4. `TerminatoKind::Assert` is, however, also present in the MIR generated for this test
31| |// (and in many other coverage tests). The `Assert` terminator is typically generated by the
32| |// Rust compiler to check for runtime failures, such as numeric overflows.
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