Add subject and test for `simple_hash`

rust/tests/simple_hash_test/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "simple-hash_test"
+version = "0.1.0"
+dependencies = [
+ "simple_hash",
+]
+
+[[package]]
+name = "simple_hash"
+version = "0.1.0"

rust/tests/simple_hash_test/Cargo.toml

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+[package]
+name = "simple-hash_test"
+version = "0.1.0"
+authors = ["MSilva95 <miguel-silva98@hotmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+simple_hash = { path = "../../../../rust-piscine-solutions/simple_hash"}

rust/tests/simple_hash_test/src/main.rs

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+// Create the function `contain` that checks a `HashMap` to see if it contains the given key.
+// Create the function `remove` that removes a given key from the `HashMap`.
+
+use std::collections::HashMap;
+
+use simple_hash::*;
+
+fn main() {
+	let mut hash: HashMap<&str, i32> = HashMap::new();
+	hash.insert("Daniel", 122);
+	hash.insert("Ashley", 333);
+	hash.insert("Katie", 334);
+	hash.insert("Robert", 14);
+
+	println!(
+		"Does the HashMap contains the name Roman? => {}",
+		contain(hash.clone(), "Roman")
+	);
+	println!(
+		"Does the HashMap contains the name Katie? => {}",
+		contain(hash.clone(), "Katie")
+	);
+	println!("Removing Robert {:?}", remove(hash.clone(), "Robert"));
+	println!("Hash {:?}", hash);
+}
+
+#[test]
+fn test_contains() {
+	let mut s = HashMap::new();
+
+	s.insert("Pedro", 43);
+	s.insert("Ralph", 12);
+	s.insert("Johnny", 546);
+	s.insert("Albert", 12323214);
+
+	assert_eq!(true, contain(s.clone(), "Pedro"));
+	assert_eq!(true, contain(s.clone(), "Ralph"));
+	assert_eq!(true, contain(s.clone(), "Johnny"));
+	assert_eq!(true, contain(s.clone(), "Albert"));
+	assert_eq!(false, contain(s.clone(), "Marco"));
+	assert_eq!(false, contain(s.clone(), "Joan"));
+	assert_eq!(false, contain(s.clone(), "Louise"));
+}
+
+#[test]
+fn test_remove() {
+	let mut n = HashMap::new();
+	n.insert("Dani Sordo", 37);
+	n.insert("Sébastien Loeb", 46);
+	n.insert("Ott Tanak", 32);
+	n.insert("Thierry Neuville", 32);
+
+	remove(n.clone(), "Dani Sordo");
+	assert_eq!(true, contain(n.clone(), "Ott Tanak"));
+	assert_eq!(false, contain(n.clone(), "Dani Ŝordo"))
+}

subjects/simple_hash/README.md

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+## simple_hash
+
+### Instructions
+
+- Create the function `contain` that checks a `HashMap` to see if it contains the given key.
+
+- Create the function `remove` that removes a given key from the `HashMap`.
+
+### Expected Functions
+
+```rust
+fn contain(h: HashMap<&str, i32>, s: &str) -> bool {
+}
+
+fn remove(mut h: HashMap<&str, i32>, s: &str) {
+}
+```
+
+### Usage
+
+Here is a program to test your function.
+
+```rust
+use std::collections::HashMap;
+
+fn main() {
+    let mut hash: HashMap<&str, i32> = HashMap::new();
+    hash.insert("Daniel", 122);
+    hash.insert("Ashley", 333);
+    hash.insert("Katie", 334);
+    hash.insert("Robert", 14);
+
+    println!(
+        "Does the HashMap contains the name Roman? => {}",
+        contain(hash.clone(), "Roman")
+    );
+    println!(
+        "Does the HashMap contains the name Katie? => {}",
+        contain(hash.clone(), "Katie")
+    );
+    println!("Removing Robert {:?}", remove(hash.clone(), "Robert"));
+    println!("Hash {:?}", hash);
+}
+```
+
+And its output
+
+```console
+student@ubuntu:~/[[ROOT]]/test$ cargo run
+Does the HashMap contains the name Roman? => false
+Does the HashMap contains the name Katie? => true
+Removing Robert ()
+Hash {"Daniel": 122, "Ashley": 333, "Robert": 14, "Katie": 334}
+student@ubuntu:~/[[ROOT]]/test$
+```