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570 lines
69 KiB
570 lines
69 KiB
1 month ago
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<ol class="chapter"><li class="chapter-item affix "><a href="../../about-book.html">关于本书</a></li><li class="chapter-item affix "><a href="../../into-rust.html">进入 Rust 编程世界</a></li><li class="chapter-item affix "><a href="../../first-try/sth-you-should-not-do.html">避免从入门到放弃</a></li><li class="chapter-item affix "><a href="../../community.html">社区和锈书</a></li><li class="spacer"></li><li class="chapter-item affix "><a href="../../some-thoughts.html">Xobserve: 一切皆可观测</a></li><li class="chapter-item affix "><a href="../../beat-ai.html">BeatAI: 工程师 AI 入门圣经</a></li><li class="chapter-item affix "><li class="part-title">Rust 语言基础学习</li><li class="spacer"></li><li class="chapter-item "><a href="../../first-try/intro.html"><strong aria-hidden="true">1.</strong> 寻找牛刀，以便小试</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../first-try/installation.html"><strong aria-hidden="true">1.1.</strong> 安装 Rust 环境</a></li><li class="chapter-item "><a href="../../first-try/editor.html"><strong aria-hidden="true">1.2.</strong> 墙推 VSCode!</a></li><li class="chapter-item "><a href="../../first-try/cargo.html"><strong aria-hidden="true">1.3.</strong> 认识 Cargo</a></li><li class="chapter-item "><a href="../../first-try/hello-world.html"><strong aria-hidden="true">1.4.</strong> 不仅仅是 Hello world</a></li><li class="chapter-item "><a href="../../first-try/slowly-downloading.html"><strong aria-hidden="true">1.5.</strong> 下载依赖太慢了？</a></li></ol></li><li class="chapter-item "><a href="../../basic/intro.html"><strong aria-hidden="true">2.</strong> Rust 基础入门</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../basic/variable.html"><strong aria-hidden="true">2.1.</strong> 变量绑定与解构</a></li><li class="chapter-item "><a href="../../basic/base-type/index.html"><strong aria-hidden="true">2.2.</strong> 基本类型</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../basic/base-type/numbers.html"><strong aria-hidden="true">2.2.1.</strong> 数值类型</a></li><li class="chapter-item "><a href="../../basic/base-type/char-bool.html"><strong aria-hidden="true">2.2.2.</strong> 字符、布尔、单元类型</a></li><li class="chapter-item "><a href="../../basic/base-type/statement-expression.html"><strong aria-hidden="true">2.2.3.</strong> 语句与表达式</a></li><li class="chapter-item "><a href="../../basic/base-type/function.html"><strong aria-hidden="true">2.2.4.</strong> 函数</a></li></ol></li><li class="chapter-item "><a href="../../basic/ownership/index.html"><strong aria-hidden="true">2.3.</strong> 所有权和借用</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../basic/ownership/ownership.html"><strong aria-hidden="true">2.3.1.</strong> 所有权</a></li><li class="chapter-item "><a href="../../basic/ownership/borrowing.html"><strong aria-hidden="true">2.3.2.</strong> 引用与借用</a></li></ol></li><li class="chapter-item "><a href="../../basic/compound-type/intro.html"><strong aria-hidden="true">2.4.</strong> 复合类型</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../basic/compound-type/string-slice.html"><strong aria-hidden="true">2.4.1.</strong> 字符串与切片</a></li><li class="chapter-item "><a href="../../basic/compound-type/tuple.html"><strong aria-hidden="true">2.4.2.</strong> 元组</a></li><li class="chapter-item "><a href="../../basic/compound-type/struct.html"><strong aria-hidden="true">2.4.3.</strong> 结构体</a></li><li class="chapter-item "><a href="../../basic/compound-type/enum.html"><strong aria-hidden="true">2.4.4.</strong> 枚举</a></li><li class="chapter-item "><a href="../../basic/compound-type/array.html"><strong aria-hidden="true">2.4.5.</strong> 数组</a></l
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<main>
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<h1 id="testing"><a class="header" href="#testing">Testing</a></h1>
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<p>好吧，我推迟了一段时间测试，因为我们都知道，我们现在是 Rust 的主人，不会再犯错了！另外，这是对一个旧 crate 的重写，所以我已经有了所有的测试。你已经看过很多测试了。它们就在这里：</p>
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<pre><pre class="playground"><code class="language-rust edition2021"><span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span>#[cfg(test)]
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mod test {
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use super::LinkedList;
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fn generate_test() -> LinkedList<i32> {
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list_from(&[0, 1, 2, 3, 4, 5, 6])
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}
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fn list_from<T: Clone>(v: &[T]) -> LinkedList<T> {
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v.iter().map(|x| (*x).clone()).collect()
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}
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#[test]
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fn test_basic_front() {
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let mut list = LinkedList::new();
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// Try to break an empty list
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assert_eq!(list.len(), 0);
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assert_eq!(list.pop_front(), None);
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assert_eq!(list.len(), 0);
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// Try to break a one item list
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list.push_front(10);
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assert_eq!(list.len(), 1);
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assert_eq!(list.pop_front(), Some(10));
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assert_eq!(list.len(), 0);
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assert_eq!(list.pop_front(), None);
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assert_eq!(list.len(), 0);
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// Mess around
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list.push_front(10);
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assert_eq!(list.len(), 1);
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list.push_front(20);
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assert_eq!(list.len(), 2);
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list.push_front(30);
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assert_eq!(list.len(), 3);
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assert_eq!(list.pop_front(), Some(30));
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assert_eq!(list.len(), 2);
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list.push_front(40);
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assert_eq!(list.len(), 3);
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assert_eq!(list.pop_front(), Some(40));
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assert_eq!(list.len(), 2);
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assert_eq!(list.pop_front(), Some(20));
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assert_eq!(list.len(), 1);
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assert_eq!(list.pop_front(), Some(10));
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assert_eq!(list.len(), 0);
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assert_eq!(list.pop_front(), None);
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assert_eq!(list.len(), 0);
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assert_eq!(list.pop_front(), None);
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assert_eq!(list.len(), 0);
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}
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#[test]
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fn test_basic() {
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let mut m = LinkedList::new();
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assert_eq!(m.pop_front(), None);
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assert_eq!(m.pop_back(), None);
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assert_eq!(m.pop_front(), None);
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m.push_front(1);
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assert_eq!(m.pop_front(), Some(1));
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m.push_back(2);
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m.push_back(3);
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assert_eq!(m.len(), 2);
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assert_eq!(m.pop_front(), Some(2));
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assert_eq!(m.pop_front(), Some(3));
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assert_eq!(m.len(), 0);
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assert_eq!(m.pop_front(), None);
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m.push_back(1);
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m.push_back(3);
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m.push_back(5);
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m.push_back(7);
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assert_eq!(m.pop_front(), Some(1));
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let mut n = LinkedList::new();
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n.push_front(2);
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n.push_front(3);
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{
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assert_eq!(n.front().unwrap(), &3);
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let x = n.front_mut().unwrap();
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assert_eq!(*x, 3);
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*x = 0;
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}
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{
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assert_eq!(n.back().unwrap(), &2);
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let y = n.back_mut().unwrap();
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assert_eq!(*y, 2);
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*y = 1;
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}
|
||
|
|
assert_eq!(n.pop_front(), Some(0));
|
||
|
|
assert_eq!(n.pop_front(), Some(1));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_iterator() {
|
||
|
|
let m = generate_test();
|
||
|
|
for (i, elt) in m.iter().enumerate() {
|
||
|
|
assert_eq!(i as i32, *elt);
|
||
|
|
}
|
||
|
|
let mut n = LinkedList::new();
|
||
|
|
assert_eq!(n.iter().next(), None);
|
||
|
|
n.push_front(4);
|
||
|
|
let mut it = n.iter();
|
||
|
|
assert_eq!(it.size_hint(), (1, Some(1)));
|
||
|
|
assert_eq!(it.next().unwrap(), &4);
|
||
|
|
assert_eq!(it.size_hint(), (0, Some(0)));
|
||
|
|
assert_eq!(it.next(), None);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_iterator_double_end() {
|
||
|
|
let mut n = LinkedList::new();
|
||
|
|
assert_eq!(n.iter().next(), None);
|
||
|
|
n.push_front(4);
|
||
|
|
n.push_front(5);
|
||
|
|
n.push_front(6);
|
||
|
|
let mut it = n.iter();
|
||
|
|
assert_eq!(it.size_hint(), (3, Some(3)));
|
||
|
|
assert_eq!(it.next().unwrap(), &6);
|
||
|
|
assert_eq!(it.size_hint(), (2, Some(2)));
|
||
|
|
assert_eq!(it.next_back().unwrap(), &4);
|
||
|
|
assert_eq!(it.size_hint(), (1, Some(1)));
|
||
|
|
assert_eq!(it.next_back().unwrap(), &5);
|
||
|
|
assert_eq!(it.next_back(), None);
|
||
|
|
assert_eq!(it.next(), None);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_rev_iter() {
|
||
|
|
let m = generate_test();
|
||
|
|
for (i, elt) in m.iter().rev().enumerate() {
|
||
|
|
assert_eq!(6 - i as i32, *elt);
|
||
|
|
}
|
||
|
|
let mut n = LinkedList::new();
|
||
|
|
assert_eq!(n.iter().rev().next(), None);
|
||
|
|
n.push_front(4);
|
||
|
|
let mut it = n.iter().rev();
|
||
|
|
assert_eq!(it.size_hint(), (1, Some(1)));
|
||
|
|
assert_eq!(it.next().unwrap(), &4);
|
||
|
|
assert_eq!(it.size_hint(), (0, Some(0)));
|
||
|
|
assert_eq!(it.next(), None);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_mut_iter() {
|
||
|
|
let mut m = generate_test();
|
||
|
|
let mut len = m.len();
|
||
|
|
for (i, elt) in m.iter_mut().enumerate() {
|
||
|
|
assert_eq!(i as i32, *elt);
|
||
|
|
len -= 1;
|
||
|
|
}
|
||
|
|
assert_eq!(len, 0);
|
||
|
|
let mut n = LinkedList::new();
|
||
|
|
assert!(n.iter_mut().next().is_none());
|
||
|
|
n.push_front(4);
|
||
|
|
n.push_back(5);
|
||
|
|
let mut it = n.iter_mut();
|
||
|
|
assert_eq!(it.size_hint(), (2, Some(2)));
|
||
|
|
assert!(it.next().is_some());
|
||
|
|
assert!(it.next().is_some());
|
||
|
|
assert_eq!(it.size_hint(), (0, Some(0)));
|
||
|
|
assert!(it.next().is_none());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_iterator_mut_double_end() {
|
||
|
|
let mut n = LinkedList::new();
|
||
|
|
assert!(n.iter_mut().next_back().is_none());
|
||
|
|
n.push_front(4);
|
||
|
|
n.push_front(5);
|
||
|
|
n.push_front(6);
|
||
|
|
let mut it = n.iter_mut();
|
||
|
|
assert_eq!(it.size_hint(), (3, Some(3)));
|
||
|
|
assert_eq!(*it.next().unwrap(), 6);
|
||
|
|
assert_eq!(it.size_hint(), (2, Some(2)));
|
||
|
|
assert_eq!(*it.next_back().unwrap(), 4);
|
||
|
|
assert_eq!(it.size_hint(), (1, Some(1)));
|
||
|
|
assert_eq!(*it.next_back().unwrap(), 5);
|
||
|
|
assert!(it.next_back().is_none());
|
||
|
|
assert!(it.next().is_none());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_eq() {
|
||
|
|
let mut n: LinkedList<u8> = list_from(&[]);
|
||
|
|
let mut m = list_from(&[]);
|
||
|
|
assert!(n == m);
|
||
|
|
n.push_front(1);
|
||
|
|
assert!(n != m);
|
||
|
|
m.push_back(1);
|
||
|
|
assert!(n == m);
|
||
|
|
|
||
|
|
let n = list_from(&[2, 3, 4]);
|
||
|
|
let m = list_from(&[1, 2, 3]);
|
||
|
|
assert!(n != m);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_ord() {
|
||
|
|
let n = list_from(&[]);
|
||
|
|
let m = list_from(&[1, 2, 3]);
|
||
|
|
assert!(n < m);
|
||
|
|
assert!(m > n);
|
||
|
|
assert!(n <= n);
|
||
|
|
assert!(n >= n);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_ord_nan() {
|
||
|
|
let nan = 0.0f64 / 0.0;
|
||
|
|
let n = list_from(&[nan]);
|
||
|
|
let m = list_from(&[nan]);
|
||
|
|
assert!(!(n < m));
|
||
|
|
assert!(!(n > m));
|
||
|
|
assert!(!(n <= m));
|
||
|
|
assert!(!(n >= m));
|
||
|
|
|
||
|
|
let n = list_from(&[nan]);
|
||
|
|
let one = list_from(&[1.0f64]);
|
||
|
|
assert!(!(n < one));
|
||
|
|
assert!(!(n > one));
|
||
|
|
assert!(!(n <= one));
|
||
|
|
assert!(!(n >= one));
|
||
|
|
|
||
|
|
let u = list_from(&[1.0f64, 2.0, nan]);
|
||
|
|
let v = list_from(&[1.0f64, 2.0, 3.0]);
|
||
|
|
assert!(!(u < v));
|
||
|
|
assert!(!(u > v));
|
||
|
|
assert!(!(u <= v));
|
||
|
|
assert!(!(u >= v));
|
||
|
|
|
||
|
|
let s = list_from(&[1.0f64, 2.0, 4.0, 2.0]);
|
||
|
|
let t = list_from(&[1.0f64, 2.0, 3.0, 2.0]);
|
||
|
|
assert!(!(s < t));
|
||
|
|
assert!(s > one);
|
||
|
|
assert!(!(s <= one));
|
||
|
|
assert!(s >= one);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_debug() {
|
||
|
|
let list: LinkedList<i32> = (0..10).collect();
|
||
|
|
assert_eq!(format!("{:?}", list), "[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]");
|
||
|
|
|
||
|
|
let list: LinkedList<&str> = vec!["just", "one", "test", "more"]
|
||
|
|
.iter().copied()
|
||
|
|
.collect();
|
||
|
|
assert_eq!(format!("{:?}", list), r#"["just", "one", "test", "more"]"#);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_hashmap() {
|
||
|
|
// Check that HashMap works with this as a key
|
||
|
|
|
||
|
|
let list1: LinkedList<i32> = (0..10).collect();
|
||
|
|
let list2: LinkedList<i32> = (1..11).collect();
|
||
|
|
let mut map = std::collections::HashMap::new();
|
||
|
|
|
||
|
|
assert_eq!(map.insert(list1.clone(), "list1"), None);
|
||
|
|
assert_eq!(map.insert(list2.clone(), "list2"), None);
|
||
|
|
|
||
|
|
assert_eq!(map.len(), 2);
|
||
|
|
|
||
|
|
assert_eq!(map.get(&list1), Some(&"list1"));
|
||
|
|
assert_eq!(map.get(&list2), Some(&"list2"));
|
||
|
|
|
||
|
|
assert_eq!(map.remove(&list1), Some("list1"));
|
||
|
|
assert_eq!(map.remove(&list2), Some("list2"));
|
||
|
|
|
||
|
|
assert!(map.is_empty());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
<span class="boring">}</span></code></pre></pre>
|
||
|
|
<p>现在是关键时刻：</p>
|
||
|
|
<pre><code class="language-text">cargo test
|
||
|
|
Finished test [unoptimized + debuginfo] target(s) in 0.00s
|
||
|
|
Running unittests src\lib.rs
|
||
|
|
|
||
|
|
running 12 tests
|
||
|
|
test test::test_basic ... ok
|
||
|
|
test test::test_basic_front ... ok
|
||
|
|
test test::test_eq ... ok
|
||
|
|
test test::test_iterator ... ok
|
||
|
|
test test::test_iterator_mut_double_end ... ok
|
||
|
|
test test::test_ord_nan ... ok
|
||
|
|
test test::test_iterator_double_end ... ok
|
||
|
|
test test::test_mut_iter ... ok
|
||
|
|
test test::test_rev_iter ... ok
|
||
|
|
test test::test_hashmap ... ok
|
||
|
|
test test::test_ord ... ok
|
||
|
|
test test::test_debug ... ok
|
||
|
|
|
||
|
|
test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
|
||
|
|
$env:MIRIFLAGS="-Zmiri-tag-raw-pointers"
|
||
|
|
cargo miri test
|
||
|
|
Compiling linked-list v0.0.3
|
||
|
|
Finished test [unoptimized + debuginfo] target(s) in 0.35s
|
||
|
|
Running unittests src\lib.rs
|
||
|
|
|
||
|
|
running 12 tests
|
||
|
|
test test::test_basic ... ok
|
||
|
|
test test::test_basic_front ... ok
|
||
|
|
test test::test_debug ... ok
|
||
|
|
test test::test_eq ... ok
|
||
|
|
test test::test_hashmap ... ok
|
||
|
|
test test::test_iterator ... ok
|
||
|
|
test test::test_iterator_double_end ... ok
|
||
|
|
test test::test_iterator_mut_double_end ... ok
|
||
|
|
test test::test_mut_iter ... ok
|
||
|
|
test test::test_ord ... ok
|
||
|
|
test test::test_ord_nan ... ok
|
||
|
|
test test::test_rev_iter ... ok
|
||
|
|
|
||
|
|
test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
|
||
|
|
</code></pre>
|
||
|
|
<p>😭</p>
|
||
|
|
<p>我们做到了，我们真的没有搞砸。这不是小把戏！我们所有的练习和训练终于值得了！我们终于写出了好代码</p>
|
||
|
|
<p>现在，我们可以回到 "有趣的事情 "上来了！</p>
|
||
|
|
|
||
|
|
<div id="giscus-container"></div>
|
||
|
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<script>
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