Close #760

Author: CppCXY

crates/emmylua_code_analysis/src/diagnostic/test/mod.rs

@@ -16,6 +16,7 @@ mod missing_fields_test;
 mod missing_parameter_test;
 mod need_check_nil_test;
 mod param_type_check_test;
+mod readonly_check;
 mod redefined_local_test;
 mod redundant_parameter_test;
 mod require_module_visibility_test;

crates/emmylua_code_analysis/src/diagnostic/test/readonly_check.rs

@@ -0,0 +1,19 @@
+#[cfg(test)]
+mod test {
+    use crate::{DiagnosticCode, VirtualWorkspace};
+
+    #[test]
+    fn test_issue_760() {
+        let mut ws = VirtualWorkspace::new();
+
+        assert!(!ws.check_code_for(
+            DiagnosticCode::ReadOnly,
+            r#"
+            ---@readonly
+            local errorCode = {}
+
+            errorCode.NOT_FOUND = 10 --- show warnings attemp modify readonly variables.
+        "#
+        ));
+    }
+}