Merge pull request rust-lang#622 from lntuition/conversions_more_utc

feat(conversions): Add more unit tests to `from_str` and `from_into` exercises.

exercises/conversions/from_into.rs

@@ -115,4 +115,18 @@ mod tests {
         assert_eq!(p.name, "John");
         assert_eq!(p.age, 30);
     }
+
+    #[test]
+    fn test_trailing_comma() {
+        let p: Person = Person::from("Mike,32,");
+        assert_eq!(p.name, "John");
+        assert_eq!(p.age, 30);
+    }
+
+    #[test]
+    fn test_trailing_comma_and_some_string() {
+        let p: Person = Person::from("Mike,32,man");
+        assert_eq!(p.name, "John");
+        assert_eq!(p.age, 30);
+    }
 }

exercises/conversions/from_str.rs

@@ -82,4 +82,16 @@ mod tests {
     fn missing_name_and_invalid_age() {
         ",one".parse::<Person>().unwrap();
     }
+
+    #[test]
+    #[should_panic]
+    fn trailing_comma() {
+        "John,32,".parse::<Person>().unwrap();
+    }
+
+    #[test]
+    #[should_panic]
+    fn trailing_comma_and_some_string() {
+        "John,32,man".parse::<Person>().unwrap();
+    }
 }