20 lines
868 B
Rust
20 lines
868 B
Rust
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#[macro_export]
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macro_rules! assert_panics {
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($e:expr) => {{
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use std::panic::{catch_unwind};
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use std::stringify;
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let expr_string = stringify!($e);
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// Note: We cannot manipulate the panic hook here, because it is global and the test
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// suite is run in parallel, which leads to race conditions in the sense
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// that some regular tests that panic might not output anything anymore.
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// Unfortunately this means that output is still printed to stdout if
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// we run cargo test -- --nocapture. But Cargo does not forward this if the test
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// binary is not run with nocapture, so it is somewhat acceptable nonetheless.
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let result = catch_unwind(|| $e);
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if result.is_ok() {
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panic!("assert_panics!({}) failed: the expression did not panic.", expr_string);
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}
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}};
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}
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