Add serde tests

src/element_creator/mod.rs

@@ -67,6 +67,35 @@ impl ElementDescriptor {
     }
 }
 
+#[test]
+fn serde_roundtrip() {
+    let descriptor = ElementDescriptor::new(
+        Color::try_from("#1540e6").unwrap(),
+        Color::try_from("#0c1d5f").unwrap(),
+        5,
+    );
+
+    let s = serde_json::to_string(&descriptor).unwrap();
+    let res = serde_json::from_str(&s).unwrap();
+
+    assert_eq!(descriptor, res);
+}
+
+#[test]
+fn serde_serialization() {
+    let s = "{\"background_color\":\"#1540e6\",\"border_color\":\"#0c1d5f\",\"border_thickness\":{\"Pixel\":5}}";
+
+    let res = serde_json::from_str(&s).unwrap();
+
+    let descriptor = ElementDescriptor::new(
+        Color::try_from("#1540e6").unwrap(),
+        Color::try_from("#0c1d5f").unwrap(),
+        5,
+    );
+
+    assert_eq!(descriptor, res);
+}
+
 #[derive(Debug, Hash, Clone, Copy, PartialEq, Eq)]
 struct ElementDefinition {
     width: u32,