Adding test coverage to src/info/info_field.rs (#810)

* Adding test coverage to src/info/info_field.rs

As requested as an item on task #700

* Implementing the suggested changes by reviewer

src/info/info_field.rs

@@ -30,3 +30,40 @@ pub enum InfoType {
     Size,
     License,
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    struct InfoFieldImpl(&'static str);
+
+    impl InfoField for InfoFieldImpl {
+        const TYPE: InfoType = InfoType::Project;
+
+        fn value(&self) -> String {
+            self.0.into()
+        }
+
+        fn title(&self) -> String {
+            String::from("title")
+        }
+    }
+
+    #[test]
+    fn test_info_field_get() {
+        let info = InfoFieldImpl("test");
+        assert_eq!(info.get(&[]), Some(String::from("test")));
+    }
+
+    #[test]
+    fn test_info_field_get_none_when_type_disabled() {
+        let info = InfoFieldImpl("test");
+        assert_eq!(info.get(&[InfoType::Project]), None);
+    }
+
+    #[test]
+    fn test_info_field_get_none_when_value_is_empty() {
+        let info = InfoFieldImpl("");
+        assert_eq!(info.get(&[]), None);
+    }
+}