test: Added integration tests for the ValidateTheme macro

tests/validate_theme_derive_integration_tests.rs

@@ -0,0 +1,35 @@
+use validate_theme_derive::ValidateTheme;
+
+#[test]
+fn test_validate_theme_derive() {
+	let theme = Theme {
+		name: "test".to_string(),
+		good: Some(Style {
+			color: "Green".to_owned(),
+		}),
+		bad: Some(Style {
+			color: "Red".to_owned(),
+		}),
+		ugly: Some(Style {
+			color: "Magenta".to_owned(),
+		}),
+	};
+
+	theme.validate();
+}
+
+#[allow(dead_code)]
+struct Style {
+	color: String,
+}
+
+#[allow(dead_code)]
+#[derive(ValidateTheme)]
+struct Theme {
+	pub name: String,
+	#[validate]
+	pub good: Option<Style>,
+	#[validate]
+	pub bad: Option<Style>,
+	pub ugly: Option<Style>,
+}