fix(typescript/prefer-namespace-keyword): skip nested TSModuleDeclarations

Author: overlookmotel

crates/oxc_linter/src/rules/typescript/prefer_namespace_keyword.rs

@@ -61,6 +61,12 @@ impl Rule for PreferNamespaceKeyword {
             return;
         }
 
+        // Ignore nested `TSModuleDeclaration`s
+        // e.g. the 2 inner `TSModuleDeclaration`s in `module A.B.C {}`
+        if let AstKind::TSModuleDeclaration(_) = ctx.nodes().parent_kind(node.id()) {
+            return;
+        }
+
         let Some(offset) = ctx.find_next_token_from(module.span.start, "module") else { return };
 
         ctx.diagnostic_with_fix(prefer_namespace_keyword_diagnostic(module.span), |fixer| {
@@ -134,6 +140,11 @@ fn test() {
             None,
         ),
         ("declare /* module */ module foo {}", "declare /* module */ namespace foo {}", None),
+        (
+            "declare module X.Y.module { x = 'module'; }",
+            "declare namespace X.Y.module { x = 'module'; }",
+            None,
+        ),
     ];
 
     Tester::new(PreferNamespaceKeyword::NAME, PreferNamespaceKeyword::PLUGIN, pass, fail)