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