From 8f14544c14efc7e591ef1dd73ac028a2c2e5e2d6 Mon Sep 17 00:00:00 2001
From: Jordan Gong <jordan.gong@protonmail.com>
Date: Fri, 4 Sep 2020 20:46:24 +0800
Subject: Write tests

---
 tests/src/lib.rs | 126 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 tests/src/lib.rs

(limited to 'tests/src/lib.rs')

diff --git a/tests/src/lib.rs b/tests/src/lib.rs
new file mode 100644
index 0000000..8742a00
--- /dev/null
+++ b/tests/src/lib.rs
@@ -0,0 +1,126 @@
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+impl Rectangle {
+    fn can_hold(&self, other: &Rectangle) -> bool {
+        self.width > other.width && self.height > other.height
+    }
+}
+
+pub fn add_two(a: i32) -> i32 {
+    a + 2
+}
+
+pub fn greeting(name: &str) -> String {
+    format!("Hello {}!", name)
+    // format!("Hello!")
+}
+
+pub struct Guess {
+    value: i32,
+}
+
+impl Guess {
+    pub fn new(value: i32) -> Guess {
+        // if value < 1 || value > 100 {
+        //     panic!("Guess value must be between 1 and 100, got {}.", value);
+        // }
+        if value < 1 {
+            panic!(
+                "Guess value must be greater than or equal to 1, got {}.",
+                value
+            );
+        } else if value > 100 {
+            panic!(
+                "Guess value must be less than or equal to 100, got {}.",
+                value
+            );
+        }
+
+        Guess { value }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    // #[test]
+    // fn exploration() {
+    //     assert_eq!(2 + 2, 4);
+    // }
+
+    // #[test]
+    // fn another() {
+    //     panic!("Make this test fail");
+    // }
+
+    use super::*;
+
+    #[test]
+    fn lager_can_hold_smaller() {
+        let larger = Rectangle {
+            width: 8,
+            height: 7,
+        };
+
+        let smaller = Rectangle {
+            width: 5,
+            height: 1,
+        };
+
+        assert!(larger.can_hold(&smaller));
+    }
+
+    #[test]
+    fn smaller_can_hold_larger() {
+        let larger = Rectangle {
+            width: 8,
+            height: 7,
+        };
+
+        let smaller = Rectangle {
+            width: 5,
+            height: 1,
+        };
+
+        assert!(!smaller.can_hold(&larger));
+    }
+
+    #[test]
+    fn it_adds_two() {
+        assert_eq!(4, add_two(2));
+    }
+
+    #[test]
+    fn greeting_contains_name() {
+        let result = greeting("Jordan");
+        assert!(
+            result.contains("Jordan"),
+            "Greeting did not contain name, value was `{}`",
+            result
+        );
+    }
+
+    // #[test]
+    // #[should_panic]
+    // fn greater_than_100() {
+    //     Guess::new(200);
+    // }
+
+    #[test]
+    #[should_panic(expected = "Guess value must be less than or equal to 100")]
+    fn greater_than_100() {
+        Guess::new(200);
+    }
+
+    #[test]
+    fn it_works() -> Result<(), String> {
+        if 2 + 2 == 4 {
+            Ok(())
+        } else {
+            Err(String::from("two plus two does not equal to four"))
+        }
+    }
+}
-- 
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