update

Author: 788994

exercises/tests/Cargo.lock

@@ -0,0 +1,7 @@
+[package]
+name = "tests8"
+version = "0.0.1"
+edition = "2021"
+[[bin]]
+name = "tests8"
+path = "tests8.rs"

exercises/tests/Cargo.toml

@@ -1,7 +1,8 @@
 //! This is the build script for both tests7 and tests8.
 //!
 //! You should modify this file to make both exercises pass.
-
+use std::time::SystemTime;
+use std::env;
 fn main() {
     // In tests7, we should set up an environment variable
     // called `TEST_FOO`. Print in the standard output to let
@@ -10,15 +11,25 @@ fn main() {
         .duration_since(std::time::UNIX_EPOCH)
         .unwrap()
         .as_secs(); // What's the use of this timestamp here?
-    let your_command = format!(
-        "Your command here with {}, please checkout exercises/tests/build.rs",
-        timestamp
-    );
-    println!("cargo:{}", your_command);
+    // let your_command = format!(
+    //     //"Your command here with {}, please checkout exercises/tests/build.rs",
+    //
+    //     timestamp
+    // );
+    // println!("cargo:{}", your_command);
+    //
+    // // In tests8, we should enable "pass" feature to make the
+    // // testcase return early. Fill in the command to tell
+    // // Cargo about that.
+    // let your_command = "Your command here, please checkout exercises/tests/build.rs";
+    // println!("cargo:{}", your_command);
+    // 修正：直接使用 Cargo 专属格式设置 TEST_FOO 环境变量（移除错误的 format! 嵌套 println!）
+    println!("cargo:rustc-env=TEST_FOO={}", timestamp);
 
     // In tests8, we should enable "pass" feature to make the
     // testcase return early. Fill in the command to tell
     // Cargo about that.
-    let your_command = "Your command here, please checkout exercises/tests/build.rs";
+    // 启用 "pass" 特性的 Cargo 指令
+    let your_command = "rustc-cfg=feature=\"pass\"";
     println!("cargo:{}", your_command);
 }

exercises/tests/build.rs

@@ -7,7 +7,7 @@
 // Execute `rustlings hint tests3` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+// I AM NOT
 
 pub fn is_even(num: i32) -> bool {
     num % 2 == 0
@@ -19,11 +19,11 @@ mod tests {
 
     #[test]
     fn is_true_when_even() {
-        assert!();
+        assert!(is_even(2));
     }
 
     #[test]
     fn is_false_when_odd() {
-        assert!();
+        assert!(!is_even(5));
     }
 }

exercises/tests/tests3.rs

@@ -5,7 +5,7 @@
 // Execute `rustlings hint tests4` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+// I AM NOT
 
 struct Rectangle {
     width: i32,
@@ -30,17 +30,19 @@ mod tests {
     fn correct_width_and_height() {
         // This test should check if the rectangle is the size that we pass into its constructor
         let rect = Rectangle::new(10, 20);
-        assert_eq!(???, 10); // check width
-        assert_eq!(???, 20); // check height
+        assert_eq!(rect.width, 10); // check width
+        assert_eq!(rect.height, 20); // check height
     }
 
     #[test]
+    #[should_panic(expected = "Rectangle width and height cannot be negative!")]
     fn negative_width() {
         // This test should check if program panics when we try to create rectangle with negative width
         let _rect = Rectangle::new(-10, 10);
     }
 
     #[test]
+    #[should_panic(expected = "Rectangle width and height cannot be negative!")]
     fn negative_height() {
         // This test should check if program panics when we try to create rectangle with negative height
         let _rect = Rectangle::new(10, -10);

exercises/tests/tests4.rs

@@ -22,7 +22,7 @@
 // Execute `rustlings hint tests5` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+// I AM NOT
 
 /// # Safety
 ///
@@ -32,7 +32,10 @@ unsafe fn modify_by_address(address: usize) {
     // code's behavior and the contract of this function. You may use the
     // comment of the test below as your format reference.
     unsafe {
-        todo!("Your code goes here")
+        //todo!("Your code goes here")
+        let ptr = address as *mut u32;
+        // 2. 解引用原始指针，并赋值为目标值 0xAABBCCDD
+        *ptr = 0xAABBCCDD;
     }
 }
 

exercises/tests/tests5.rs

@@ -7,7 +7,7 @@
 // Execute `rustlings hint tests6` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+// I AM NOT
 
 struct Foo {
     a: u128,
@@ -20,8 +20,13 @@ struct Foo {
 unsafe fn raw_pointer_to_box(ptr: *mut Foo) -> Box<Foo> {
     // SAFETY: The `ptr` contains an owned box of `Foo` by contract. We
     // simply reconstruct the box from that pointer.
-    let mut ret: Box<Foo> = unsafe { ??? };
-    todo!("The rest of the code goes here")
+    let mut ret: Box<Foo> = unsafe {
+        Box::from_raw(ptr)
+    };
+    //todo!("The rest of the code goes here")
+    ret.b = Some("hello".to_owned());
+    // 返回修改后的 Box<Foo>
+    ret
 }
 
 #[cfg(test)]

exercises/tests/tests6.rs

@@ -34,7 +34,7 @@
 // Execute `rustlings hint tests7` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+// I AM NOT
 
 fn main() {}
 
@@ -51,5 +51,7 @@ mod tests {
         let s = std::env::var("TEST_FOO").unwrap();
         let e: u64 = s.parse().unwrap();
         assert!(timestamp >= e && timestamp < e + 10);
+
+
     }
 }

exercises/tests/tests7.rs

@@ -7,7 +7,7 @@
 // Execute `rustlings hint tests8` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+// I AM NOT
 
 fn main() {}
 

exercises/tests/tests8.rs

@@ -27,15 +27,23 @@
 //
 // You should NOT modify any existing code except for adding two lines of attributes.
 
-// I AM NOT DONE
+// I AM NOT
 
 extern "Rust" {
     fn my_demo_function(a: u32) -> u32;
+    #[link_name = "my_demo_function"]
     fn my_demo_function_alias(a: u32) -> u32;
 }
 
 mod Foo {
     // No `extern` equals `extern "Rust"`.
+
+
+
+    #[no_mangle]
+
+
+    // No `extern` equals `extern "Rust"`.
     fn my_demo_function(a: u32) -> u32 {
         a
     }