Write tests

3 files changed, 153 insertions, 0 deletions

diff --git a/tests/.gitignore b/tests/.gitignore
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+++ b/tests/.gitignore
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+
+# Created by https://www.toptal.com/developers/gitignore/api/rust
+# Edit at https://www.toptal.com/developers/gitignore?templates=rust
+
+### Rust ###
+# Generated by Cargo
+# will have compiled files and executables
+/target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# End of https://www.toptal.com/developers/gitignore/api/rust
+
diff --git a/tests/Cargo.toml b/tests/Cargo.toml
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+++ b/tests/Cargo.toml
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+[package]
+name = "tests"
+version = "0.1.0"
+authors = ["Jordan Gong <jordan.gong@protonmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/tests/src/lib.rs b/tests/src/lib.rs
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+++ b/tests/src/lib.rs
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+#[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"))
+        }
+    }
+}