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//! Common types used by `libtest`.
use std::borrow::Cow;
use std::fmt;
use super::bench::Bencher;
use super::options;
pub use NamePadding::*;
pub use TestFn::*;
pub use TestName::*;
/// Type of the test according to the [rust book](https://doc.rust-lang.org/cargo/guide/tests.html)
/// conventions.
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum TestType {
/// Unit-tests are expected to be in the `src` folder of the crate.
UnitTest,
/// Integration-style tests are expected to be in the `tests` folder of the crate.
IntegrationTest,
/// Doctests are created by the `librustdoc` manually, so it's a different type of test.
DocTest,
/// Tests for the sources that don't follow the project layout convention
/// (e.g. tests in raw `main.rs` compiled by calling `rustc --test` directly).
Unknown,
}
#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
pub enum NamePadding {
PadNone,
PadOnRight,
}
// The name of a test. By convention this follows the rules for rust
// paths; i.e., it should be a series of identifiers separated by double
// colons. This way if some test runner wants to arrange the tests
// hierarchically it may.
#[derive(Clone, PartialEq, Eq, Hash, Debug)]
pub enum TestName {
StaticTestName(&'static str),
DynTestName(String),
AlignedTestName(Cow<'static, str>, NamePadding),
}
impl TestName {
pub fn as_slice(&self) -> &str {
match *self {
StaticTestName(s) => s,
DynTestName(ref s) => s,
AlignedTestName(ref s, _) => s,
}
}
pub fn padding(&self) -> NamePadding {
match self {
&AlignedTestName(_, p) => p,
_ => PadNone,
}
}
pub fn with_padding(&self, padding: NamePadding) -> TestName {
let name = match *self {
TestName::StaticTestName(name) => Cow::Borrowed(name),
TestName::DynTestName(ref name) => Cow::Owned(name.clone()),
TestName::AlignedTestName(ref name, _) => name.clone(),
};
TestName::AlignedTestName(name, padding)
}
}
impl fmt::Display for TestName {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
fmt::Display::fmt(self.as_slice(), f)
}
}
// A function that runs a test. If the function returns successfully,
// the test succeeds; if the function panics or returns Result::Err
// then the test fails. We may need to come up with a more clever
// definition of test in order to support isolation of tests into
// threads.
pub enum TestFn {
StaticTestFn(fn() -> Result<(), String>),
StaticBenchFn(fn(&mut Bencher) -> Result<(), String>),
DynTestFn(Box<dyn FnOnce() -> Result<(), String> + Send>),
DynBenchFn(Box<dyn Fn(&mut Bencher) -> Result<(), String> + Send>),
}
impl TestFn {
pub fn padding(&self) -> NamePadding {
match *self {
StaticTestFn(..) => PadNone,
StaticBenchFn(..) => PadOnRight,
DynTestFn(..) => PadNone,
DynBenchFn(..) => PadOnRight,
}
}
}
impl fmt::Debug for TestFn {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(match *self {
StaticTestFn(..) => "StaticTestFn(..)",
StaticBenchFn(..) => "StaticBenchFn(..)",
DynTestFn(..) => "DynTestFn(..)",
DynBenchFn(..) => "DynBenchFn(..)",
})
}
}
// A unique integer associated with each test.
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
pub struct TestId(pub usize);
// The definition of a single test. A test runner will run a list of
// these.
#[derive(Clone, Debug)]
pub struct TestDesc {
pub name: TestName,
pub ignore: bool,
pub ignore_message: Option<&'static str>,
pub should_panic: options::ShouldPanic,
pub compile_fail: bool,
pub no_run: bool,
pub test_type: TestType,
}
impl TestDesc {
pub fn padded_name(&self, column_count: usize, align: NamePadding) -> String {
let mut name = String::from(self.name.as_slice());
let fill = column_count.saturating_sub(name.len());
let pad = " ".repeat(fill);
match align {
PadNone => name,
PadOnRight => {
name.push_str(&pad);
name
}
}
}
/// Returns None for ignored test or that that are just run, otherwise give a description of the type of test.
/// Descriptions include "should panic", "compile fail" and "compile".
pub fn test_mode(&self) -> Option<&'static str> {
if self.ignore {
return None;
}
match self.should_panic {
options::ShouldPanic::Yes | options::ShouldPanic::YesWithMessage(_) => {
return Some("should panic");
}
options::ShouldPanic::No => {}
}
if self.compile_fail {
return Some("compile fail");
}
if self.no_run {
return Some("compile");
}
None
}
}
#[derive(Debug)]
pub struct TestDescAndFn {
pub desc: TestDesc,
pub testfn: TestFn,
}
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