Rollup merge of #76273 - CraftSpider:master, r=matklad

Move some Vec UI tests into alloc unit tests

A bit of work towards #76268, makes a number of the Vec UI tests that are simply running code into unit tests. Ensured that they are being run when testing liballoc locally.

src/test/ui/array-slice-vec/vec-concat.rs

@@ -1,14 +0,0 @@
-// run-pass
-
-use std::vec;
-
-pub fn main() {
-    let a: Vec<isize> = vec![1, 2, 3, 4, 5];
-    let b: Vec<isize> = vec![6, 7, 8, 9, 0];
-    let mut v: Vec<isize> = a;
-    v.extend_from_slice(&b);
-    println!("{}", v[9]);
-    assert_eq!(v[0], 1);
-    assert_eq!(v[7], 8);
-    assert_eq!(v[9], 0);
-}

src/test/ui/array-slice-vec/vec-growth.rs

@@ -1,16 +0,0 @@
-// run-pass
-
-
-
-pub fn main() {
-    let mut v = vec![1];
-    v.push(2);
-    v.push(3);
-    v.push(4);
-    v.push(5);
-    assert_eq!(v[0], 1);
-    assert_eq!(v[1], 2);
-    assert_eq!(v[2], 3);
-    assert_eq!(v[3], 4);
-    assert_eq!(v[4], 5);
-}

src/test/ui/array-slice-vec/vec-push.rs

@@ -1,3 +0,0 @@
-// run-pass
-
-pub fn main() { let mut v = vec![1, 2, 3]; v.push(1); }

src/test/ui/array-slice-vec/vec-slice.rs

@@ -1,9 +0,0 @@
-// run-pass
-
-
-pub fn main() {
-    let  v = vec![1,2,3,4,5];
-    let v2 = &v[1..3];
-    assert_eq!(v2[0], 2);
-    assert_eq!(v2[1], 3);
-}

src/test/ui/array-slice-vec/vec-to_str.rs

@@ -1,12 +0,0 @@
-// run-pass
-
-
-pub fn main() {
-    assert_eq!(format!("{:?}", vec![0, 1]), "[0, 1]".to_string());
-
-    let foo = vec![3, 4];
-    let bar: &[isize] = &[4, 5];
-
-    assert_eq!(format!("{:?}", foo), "[3, 4]");
-    assert_eq!(format!("{:?}", bar), "[4, 5]");
-}

src/test/ui/array-slice-vec/vec.rs

@@ -1,15 +0,0 @@
-// run-pass
-
-
-
-pub fn main() {
-    let v: Vec<isize> = vec![10, 20];
-    assert_eq!(v[0], 10);
-    assert_eq!(v[1], 20);
-    let mut x: usize = 0;
-    assert_eq!(v[x], 10);
-    assert_eq!(v[x + 1], 20);
-    x = x + 1;
-    assert_eq!(v[x], 20);
-    assert_eq!(v[x - 1], 10);
-}