Add the exercise division_and_remainder's subject and tests

rust/tests/division_and_remainder_test/Cargo.lock

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

rust/tests/division_and_remainder_test/Cargo.toml

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+[package]
+name = "division_and_reminder_test"
+version = "0.1.0"
+authors = ["Augusto <aug.ornelas@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+division_and_remainder = { path = "../../../../rust-piscine-solutions/division_and_remainder" }

rust/tests/division_and_remainder_test/src/main.rs

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+use division_and_remainder::*;
+
+fn main() {
+	let x = 9;
+	let y = 4;
+	let (division, remainder) = divide(x, y);
+	println!(
+		"\t{}/{}: division = {}, remainder = {}",
+		x, y, division, remainder
+	);
+}
+
+#[test]
+#[should_panic]
+fn divide_by_0() {
+	divide(40, 0);
+}
+
+#[test]
+fn test_divide() {
+	let (div, rem) = divide(40, 3);
+
+	assert_eq!(div, 13);
+	assert_eq!(rem, 1);
+
+	let (div, rem) = divide(389, 39);
+
+	assert_eq!(div, 9);
+	assert_eq!(rem, 38);
+
+	let (div, rem) = divide(29, 332);
+
+	assert_eq!(div, 0);
+	assert_eq!(rem, 29);
+}

subjects/division_and_remainder/README.md

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+## division_and_remainder
+
+### Instructions
+
+Create a function divide that receives two i32 and returns a tuple in which the first element is the result of the integer division between the two numbers and the second is the remainder of the division.
+
+### Expected Function
+
+```rust
+fn divide(x: i32, y: i32) -> (i32, i32) {
+
+}
+```
+
+### Usage
+
+Here is a program to test you're function
+
+```rust
+fn main() {
+	let x = 9;
+	let y = 4;
+	let (division, remainder) = divide(x, y);
+	println!(
+		"\t{}/{}: division = {}, remainder = {}",
+		x, y, division, remainder
+	);
+}
+```
+
+And its output
+
+```console
+student@ubuntu:~/[[ROOT]]/test$ cargo run
+9/4: division = 2, remainder = 1
+student@ubuntu:~/[[ROOT]]/test$
+```