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Add test of Debug representation of Backtrace

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This commit is contained in:
David Tolnay 2020-02-13 00:16:28 -08:00
parent a9cc010c48
commit 33600e4d2d
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1 changed files with 52 additions and 0 deletions
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52
src/libstd/backtrace.rs
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@ -433,3 +433,55 @@ impl RawFrame {
}
}
}
#[test]
fn test_debug() {
let backtrace = Backtrace {
inner: Inner::Captured(Mutex::new(Capture {
actual_start: 1,
resolved: true,
frames: vec![
BacktraceFrame {
frame: RawFrame::Fake,
symbols: vec![BacktraceSymbol {
name: Some(b"std::backtrace::Backtrace::create".to_vec()),
filename: Some(BytesOrWide::Bytes(b"/rust/backtrace.rs".to_vec())),
lineno: Some(100),
}],
},
BacktraceFrame {
frame: RawFrame::Fake,
symbols: vec![BacktraceSymbol {
name: Some(b"__rust_maybe_catch_panic".to_vec()),
filename: None,
lineno: None,
}],
},
BacktraceFrame {
frame: RawFrame::Fake,
symbols: vec![
BacktraceSymbol {
name: Some(b"std::rt::lang_start_internal".to_vec()),
filename: Some(BytesOrWide::Bytes(b"/rust/rt.rs".to_vec())),
lineno: Some(300),
},
BacktraceSymbol {
name: Some(b"std::rt::lang_start".to_vec()),
filename: Some(BytesOrWide::Bytes(b"/rust/rt.rs".to_vec())),
lineno: Some(400),
},
],
},
],
})),
};
#[rustfmt::skip]
let expected = "Backtrace [\
\n { fn: \"__rust_maybe_catch_panic\" },\
\n { fn: \"std::rt::lang_start_internal\", file: \"/rust/rt.rs\", line: 300 },\
\n { fn: \"std::rt::lang_start\", file: \"/rust/rt.rs\", line: 400 },\
\n]";
assert_eq!(format!("{:#?}", backtrace), expected);
}