test: Add missing test case for from_str exercise

exercises/conversions/from_into.rs

@@ -29,7 +29,8 @@ impl Default for Person {
 // 1. If the length of the provided string is 0, then return the default of Person
 // 2. Split the given string on the commas present in it
 // 3. Extract the first element from the split operation and use it as the name
-// 4. Extract the other element from the split operation and parse it into a `usize` as the age
+// 4. If the name is empty, then return the default of Person
+// 5. Extract the other element from the split operation and parse it into a `usize` as the age
 // If while parsing the age, something goes wrong, then return the default of Person
 // Otherwise, then return an instantiated Person onject with the results
 impl From<&str> for Person {
@@ -77,4 +78,39 @@ mod tests {
         assert_eq!(p.name, "John");
         assert_eq!(p.age, 30);
     }
+
+    #[test]
+    fn test_missing_comma_and_age() {
+        let p: Person = Person::from("Mark");
+        assert_eq!(p.name, "John");
+        assert_eq!(p.age, 30);
+    }
+
+    #[test]
+    fn test_missing_age() {
+        let p: Person = Person::from("Mark,");
+        assert_eq!(p.name, "John");
+        assert_eq!(p.age, 30);
+    }
+
+    #[test]
+    fn test_missing_name() {
+        let p: Person = Person::from(",1");
+        assert_eq!(p.name, "John");
+        assert_eq!(p.age, 30);
+    }
+
+    #[test]
+    fn test_missing_name_and_age() {
+        let p: Person = Person::from(",");
+        assert_eq!(p.name, "John");
+        assert_eq!(p.age, 30);
+    }
+
+    #[test]
+    fn test_missing_name_and_invalid_age() {
+        let p: Person = Person::from(",one");
+        assert_eq!(p.name, "John");
+        assert_eq!(p.age, 30);
+    }
 }

exercises/conversions/from_str.rs

@@ -15,7 +15,8 @@ struct Person {
 // 1. If the length of the provided string is 0, then return an error
 // 2. Split the given string on the commas present in it
 // 3. Extract the first element from the split operation and use it as the name
-// 4. Extract the other element from the split operation and parse it into a `usize` as the age
+// 4. If the name is empty, then return an error
+// 5. Extract the other element from the split operation and parse it into a `usize` as the age
 // If while parsing the age, something goes wrong, then return an error
 // Otherwise, then return a Result of a Person object
 impl FromStr for Person {
@@ -39,11 +40,46 @@ mod tests {
     }
     #[test]
     fn good_input() {
-        assert!("John,32".parse::<Person>().is_ok());
+        let p = "John,32".parse::<Person>();
+        assert!(p.is_ok());
+        let p = p.unwrap();
+        assert_eq!(p.name, "John");
+        assert_eq!(p.age, 32);
     }
     #[test]
     #[should_panic]
     fn missing_age() {
+        "John,".parse::<Person>().unwrap();
+    }
+
+    #[test]
+    #[should_panic]
+    fn invalid_age() {
+        "John,twenty".parse::<Person>().unwrap();
+    }
+
+    #[test]
+    #[should_panic]
+    fn missing_comma_and_age() {
         "John".parse::<Person>().unwrap();
     }
+
+    #[test]
+    #[should_panic]
+    fn missing_name() {
+        ",1".parse::<Person>().unwrap();
+    }
+
+    #[test]
+    #[should_panic]
+    fn missing_name_and_age() {
+        ",".parse::<Person>().unwrap();
+    }
+
+    #[test]
+    #[should_panic]
+    fn missing_name_and_invalid_age() {
+        ",one".parse::<Person>().unwrap();
+    }
+
 }

exercises/conversions/try_from_into.rs

@@ -22,7 +22,8 @@ struct Person {
 // 1. If the length of the provided string is 0, then return an error
 // 2. Split the given string on the commas present in it
 // 3. Extract the first element from the split operation and use it as the name
-// 4. Extract the other element from the split operation and parse it into a `usize` as the age
+// 4. If the name is empty, then return an error.
+// 5. Extract the other element from the split operation and parse it into a `usize` as the age
 // If while parsing the age, something goes wrong, then return an error
 // Otherwise, then return a Result of a Person object
 impl TryFrom<&str> for Person {
@@ -68,4 +69,34 @@ mod tests {
     fn test_panic_bad_age() {
         let p = Person::try_from("Mark,twenty").unwrap();
     }
+
+    #[test]
+    #[should_panic]
+    fn test_missing_comma_and_age() {
+        let _: Person = "Mark".try_into().unwrap();
+    }
+
+    #[test]
+    #[should_panic]
+    fn test_missing_age() {
+        let _: Person = "Mark,".try_into().unwrap();
+    }
+
+    #[test]
+    #[should_panic]
+    fn test_missing_name() {
+        let _ : Person = ",1".try_into().unwrap();
+    }
+
+    #[test]
+    #[should_panic]
+    fn test_missing_name_and_age() {
+        let _: Person = ",".try_into().unwrap();
+    }
+
+    #[test]
+    #[should_panic]
+    fn test_missing_name_and_invalid_age() {
+        let _: Person = ",one".try_into().unwrap();
+    }
 }