mirror of https://github.com/rust-lang/rust
117 lines
5.3 KiB
Plaintext
117 lines
5.3 KiB
Plaintext
$DIR/auxiliary/doctest_crate.rs:
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LL| |/// A function run only from within doctests
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LL| 3|pub fn fn_run_in_doctests(conditional: usize) {
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LL| 3| match conditional {
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LL| 1| 1 => assert_eq!(1, 1), // this is run,
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LL| 1| 2 => assert_eq!(1, 1), // this,
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LL| 1| 3 => assert_eq!(1, 1), // and this too
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LL| 0| _ => assert_eq!(1, 2), // however this is not
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LL| | }
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LL| 3|}
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$DIR/doctest.rs:
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LL| |//@ aux-build:doctest_crate.rs
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LL| |
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LL| |//! This test ensures that code from doctests is properly re-mapped.
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LL| |//! See <https://github.com/rust-lang/rust/issues/79417> for more info.
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LL| |//!
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LL| |//! Just some random code:
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LL| 1|//! ```
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LL| 1|//! if true {
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LL| |//! // this is executed!
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LL| 1|//! assert_eq!(1, 1);
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LL| |//! } else {
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LL| |//! // this is not!
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LL| 0|//! assert_eq!(1, 2);
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LL| |//! }
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LL| 1|//! ```
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LL| |//!
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LL| |//! doctest testing external code:
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LL| |//! ```
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LL| 1|//! extern crate doctest_crate;
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LL| 1|//! doctest_crate::fn_run_in_doctests(1);
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LL| 1|//! ```
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LL| |//!
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LL| |//! doctest returning a result:
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LL| 1|//! ```
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LL| 1|//! #[derive(Debug, PartialEq)]
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LL| 1|//! struct SomeError {
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LL| 1|//! msg: String,
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LL| 1|//! }
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LL| 1|//! let mut res = Err(SomeError { msg: String::from("a message") });
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LL| 1|//! if res.is_ok() {
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LL| 0|//! res?;
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LL| |//! } else {
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LL| 1|//! if *res.as_ref().unwrap_err() == *res.as_ref().unwrap_err() {
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LL| 1|//! println!("{:?}", res);
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LL| 1|//! }
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^0
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LL| 1|//! if *res.as_ref().unwrap_err() == *res.as_ref().unwrap_err() {
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LL| 1|//! res = Ok(1);
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LL| 1|//! }
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^0
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LL| 1|//! res = Ok(0);
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LL| |//! }
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LL| |//! // need to be explicit because rustdoc cant infer the return type
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LL| 1|//! Ok::<(), SomeError>(())
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LL| 1|//! ```
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LL| |//!
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LL| |//! doctest with custom main:
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LL| |//! ```
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LL| 1|//! fn some_func() {
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LL| 1|//! println!("called some_func()");
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LL| 1|//! }
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LL| |//!
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LL| |//! #[derive(Debug)]
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LL| |//! struct SomeError;
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LL| |//!
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LL| |//! extern crate doctest_crate;
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LL| |//!
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LL| 1|//! fn doctest_main() -> Result<(), SomeError> {
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LL| 1|//! some_func();
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LL| 1|//! doctest_crate::fn_run_in_doctests(2);
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LL| 1|//! Ok(())
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LL| 1|//! }
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LL| |//!
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LL| |//! // this `main` is not shown as covered, as it clashes with all the other
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LL| |//! // `main` functions that were automatically generated for doctests
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LL| |//! fn main() -> Result<(), SomeError> {
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LL| |//! doctest_main()
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LL| |//! }
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LL| |//! ```
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LL| |
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LL| |/// doctest attached to fn testing external code:
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LL| |/// ```
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LL| 1|/// extern crate doctest_crate;
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LL| 1|/// doctest_crate::fn_run_in_doctests(3);
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LL| 1|/// ```
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LL| |///
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LL| 1|fn main() {
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LL| 1| if true {
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LL| 1| assert_eq!(1, 1);
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LL| | } else {
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LL| 0| assert_eq!(1, 2);
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LL| | }
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LL| 1|}
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LL| |
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LL| |// FIXME(Swatinem): Fix known issue that coverage code region columns need to be offset by the
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LL| |// doc comment line prefix (`///` or `//!`) and any additional indent (before or after the doc
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LL| |// comment characters). This test produces `llvm-cov show` results demonstrating the problem.
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LL| |//
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LL| |// One of the above tests now includes: `derive(Debug, PartialEq)`, producing an `llvm-cov show`
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LL| |// result with a distinct count for `Debug`, denoted by `^1`, but the caret points to the wrong
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LL| |// column. Similarly, the `if` blocks without `else` blocks show `^0`, which should point at, or
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LL| |// one character past, the `if` block's closing brace. In both cases, these are most likely off
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LL| |// by the number of characters stripped from the beginning of each doc comment line: indent
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LL| |// whitespace, if any, doc comment prefix (`//!` in this case) and (I assume) one space character
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LL| |// (?). Note, when viewing `llvm-cov show` results in `--color` mode, the column offset errors are
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LL| |// more pronounced, and show up in more places, with background color used to show some distinct
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LL| |// code regions with different coverage counts.
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LL| |//
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LL| |// NOTE: Since the doc comment line prefix may vary, one possible solution is to replace each
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LL| |// character stripped from the beginning of doc comment lines with a space. This will give coverage
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LL| |// results the correct column offsets, and I think it should compile correctly, but I don't know
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LL| |// what affect it might have on diagnostic messages from the compiler, and whether anyone would care
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LL| |// if the indentation changed. I don't know if there is a more viable solution.
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