fix(codegen): print object property this param (#19783)

crates/oxc_codegen/src/gen.rs

@@ -1640,6 +1640,13 @@ impl Gen for ObjectProperty<'_> {
                     type_parameters.print(p, ctx);
                 }
                 p.print_ascii_byte(b'(');
+                if let Some(this_param) = &func.this_param {
+                    this_param.print(p, ctx);
+                    if !func.params.is_empty() || func.params.rest.is_some() {
+                        p.print_ascii_byte(b',');
+                        p.print_soft_space();
+                    }
+                }
                 func.params.print(p, ctx);
                 p.print_ascii_byte(b')');
                 if let Some(return_type) = &func.return_type {

crates/oxc_codegen/tests/integration/ts.rs

@@ -8,6 +8,8 @@ use crate::{
 #[test]
 fn cases() {
     test_same("({ foo(): string {} });\n");
+    test_same("({ method(this: Foo): void {} });\n");
+    test_same("({ methodWithParam(this: Foo, bar: string): void {} });\n");
     test_same("interface I<in out T,> {}\n");
     test_same("function F<const in out T,>() {}\n");
     test_same("class C {\n\tp = await(0);\n}\n");