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Rollup merge of #69690 - thekuom:test/67311-extend-bindings-after-at-tests, r=Centril

test(pattern): add tests for combinations of pattern features

Reference issue #67311

Tests combinations of the following pattern features:
- bindings_after_at
- or_patterns
- slice_patterns
- box_patterns

r? @Centril
This commit is contained in:
Mazdak Farrokhzad 2020-03-07 08:15:28 +01:00 committed by GitHub
commit ba1f6cbb00
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7 changed files with 307 additions and 0 deletions

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// Test or-patterns with box-patterns
// run-pass
#![feature(or_patterns)]
#![feature(box_patterns)]
#[derive(Debug, PartialEq)]
enum MatchArm {
Arm(usize),
Wild,
}
#[derive(Debug)]
enum Test {
Foo,
Bar,
Baz,
Qux,
}
fn test(x: Option<Box<Test>>) -> MatchArm {
match x {
Some(box Test::Foo | box Test::Bar) => MatchArm::Arm(0),
Some(box Test::Baz) => MatchArm::Arm(1),
Some(_) => MatchArm::Arm(2),
_ => MatchArm::Wild,
}
}
fn main() {
assert_eq!(test(Some(Box::new(Test::Foo))), MatchArm::Arm(0));
assert_eq!(test(Some(Box::new(Test::Bar))), MatchArm::Arm(0));
assert_eq!(test(Some(Box::new(Test::Baz))), MatchArm::Arm(1));
assert_eq!(test(Some(Box::new(Test::Qux))), MatchArm::Arm(2));
assert_eq!(test(None), MatchArm::Wild);
}

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// Test or-patterns with slice-patterns
// run-pass
#![feature(or_patterns)]
#[derive(Debug, PartialEq)]
enum MatchArm {
Arm(usize),
Wild,
}
#[derive(Debug)]
enum Test {
Foo,
Bar,
Baz,
Qux,
}
fn test(foo: &[Option<Test>]) -> MatchArm {
match foo {
[.., Some(Test::Qux | Test::Foo)] => MatchArm::Arm(0),
[Some(Test::Foo), .., Some(Test::Baz | Test::Bar)] => MatchArm::Arm(1),
[.., Some(Test::Bar | Test::Baz), _] => MatchArm::Arm(2),
_ => MatchArm::Wild,
}
}
fn main() {
let foo = vec![
Some(Test::Foo),
Some(Test::Bar),
Some(Test::Baz),
Some(Test::Qux),
];
// path 1a
assert_eq!(test(&foo), MatchArm::Arm(0));
// path 1b
assert_eq!(test(&[Some(Test::Bar), Some(Test::Foo)]), MatchArm::Arm(0));
// path 2a
assert_eq!(test(&foo[..3]), MatchArm::Arm(1));
// path 2b
assert_eq!(test(&[Some(Test::Foo), Some(Test::Foo), Some(Test::Bar)]), MatchArm::Arm(1));
// path 3a
assert_eq!(test(&foo[1..3]), MatchArm::Arm(2));
// path 3b
assert_eq!(test(&[Some(Test::Bar), Some(Test::Baz), Some(Test::Baz), Some(Test::Bar)]),
MatchArm::Arm(2));
// path 4
assert_eq!(test(&foo[4..]), MatchArm::Wild);
}

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// Test bindings-after-at with box-patterns
// run-pass
#![feature(bindings_after_at)]
#![feature(box_patterns)]
#[derive(Debug, PartialEq)]
enum MatchArm {
Arm(usize),
Wild,
}
fn test(x: Option<Box<i32>>) -> MatchArm {
match x {
ref bar @ Some(box n) if n > 0 => {
// bar is a &Option<Box<i32>>
assert_eq!(bar, &x);
MatchArm::Arm(0)
},
Some(ref bar @ box n) if n < 0 => {
// bar is a &Box<i32> here
assert_eq!(**bar, n);
MatchArm::Arm(1)
},
_ => MatchArm::Wild,
}
}
fn main() {
assert_eq!(test(Some(Box::new(2))), MatchArm::Arm(0));
assert_eq!(test(Some(Box::new(-1))), MatchArm::Arm(1));
assert_eq!(test(Some(Box::new(0))), MatchArm::Wild);
}

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// Test bindings-after-at with or-patterns and box-patterns
// run-pass
#![feature(bindings_after_at)]
#![feature(or_patterns)]
#![feature(box_patterns)]
#[derive(Debug, PartialEq)]
enum MatchArm {
Arm(usize),
Wild,
}
#[derive(Debug, PartialEq)]
enum Test {
Foo,
Bar,
Baz,
Qux,
}
fn test(foo: Option<Box<Test>>) -> MatchArm {
match foo {
ref bar @ Some(box Test::Foo | box Test::Bar) => {
assert_eq!(bar, &foo);
MatchArm::Arm(0)
},
Some(ref bar @ box Test::Baz | ref bar @ box Test::Qux) => {
assert!(**bar == Test::Baz || **bar == Test::Qux);
MatchArm::Arm(1)
},
_ => MatchArm::Wild,
}
}
fn main() {
assert_eq!(test(Some(Box::new(Test::Foo))), MatchArm::Arm(0));
assert_eq!(test(Some(Box::new(Test::Bar))), MatchArm::Arm(0));
assert_eq!(test(Some(Box::new(Test::Baz))), MatchArm::Arm(1));
assert_eq!(test(Some(Box::new(Test::Qux))), MatchArm::Arm(1));
assert_eq!(test(None), MatchArm::Wild);
}

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// Test bindings-after-at with or-patterns and slice-patterns
// run-pass
#![feature(bindings_after_at)]
#![feature(or_patterns)]
#[derive(Debug, PartialEq)]
enum MatchArm {
Arm(usize),
Wild,
}
#[derive(Debug, PartialEq)]
enum Test {
Foo,
Bar,
Baz,
Qux,
}
fn test(foo: &[Option<Test>]) -> MatchArm {
match foo {
bar @ [Some(Test::Foo), .., Some(Test::Qux | Test::Foo)] => {
assert_eq!(bar, foo);
MatchArm::Arm(0)
},
[.., bar @ Some(Test::Bar | Test::Qux), _] => {
assert!(bar == &Some(Test::Bar) || bar == &Some(Test::Qux));
MatchArm::Arm(1)
},
_ => MatchArm::Wild,
}
}
fn main() {
let foo = vec![
Some(Test::Foo),
Some(Test::Bar),
Some(Test::Baz),
Some(Test::Qux),
];
// path 1a
assert_eq!(test(&foo), MatchArm::Arm(0));
// path 1b
assert_eq!(test(&[Some(Test::Foo), Some(Test::Bar), Some(Test::Foo)]), MatchArm::Arm(0));
// path 2a
assert_eq!(test(&foo[..3]), MatchArm::Arm(1));
// path 2b
assert_eq!(test(&[Some(Test::Bar), Some(Test::Qux), Some(Test::Baz)]), MatchArm::Arm(1));
// path 3
assert_eq!(test(&foo[1..2]), MatchArm::Wild);
}

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// Test bindings-after-at with or-patterns
// run-pass
#![feature(bindings_after_at)]
#![feature(or_patterns)]
#[derive(Debug, PartialEq)]
enum MatchArm {
Arm(usize),
Wild,
}
#[derive(Debug, Clone, Copy, PartialEq)]
enum Test {
Foo,
Bar,
Baz,
Qux,
}
fn test(foo: Option<Test>) -> MatchArm {
match foo {
bar @ Some(Test::Foo | Test::Bar) => {
assert!(bar == Some(Test::Foo) || bar == Some(Test::Bar));
MatchArm::Arm(0)
},
Some(_) => MatchArm::Arm(1),
_ => MatchArm::Wild,
}
}
fn main() {
assert_eq!(test(Some(Test::Foo)), MatchArm::Arm(0));
assert_eq!(test(Some(Test::Bar)), MatchArm::Arm(0));
assert_eq!(test(Some(Test::Baz)), MatchArm::Arm(1));
assert_eq!(test(Some(Test::Qux)), MatchArm::Arm(1));
assert_eq!(test(None), MatchArm::Wild);
}

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// Test bindings-after-at with slice-patterns
// run-pass
#![feature(bindings_after_at)]
#[derive(Debug, PartialEq)]
enum MatchArm {
Arm(usize),
Wild,
}
fn test(foo: &[i32]) -> MatchArm {
match foo {
[bar @ .., n] if n == &5 => {
for i in bar {
assert!(i < &5);
}
MatchArm::Arm(0)
},
bar @ [x0, .., xn] => {
assert_eq!(x0, &1);
assert_eq!(x0, &1);
assert_eq!(xn, &4);
assert_eq!(bar, &[1, 2, 3, 4]);
MatchArm::Arm(1)
},
_ => MatchArm::Wild,
}
}
fn main() {
let foo = vec![1, 2, 3, 4, 5];
assert_eq!(test(&foo), MatchArm::Arm(0));
assert_eq!(test(&foo[..4]), MatchArm::Arm(1));
assert_eq!(test(&foo[0..1]), MatchArm::Wild);
}