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