test: extract duplicate code into another helper

tests/converters/helpers/commonTests.ts

@@ -0,0 +1,26 @@
+import { test } from "bun:test";
+import { ConvertFnWithExecFile } from "../../../src/converters/types.ts";
+import {
+  runConvertFailTest,
+  runConvertLogsStderror,
+  runConvertLogsStderrorAndStdout,
+  runConvertSuccessTest,
+} from "./converters.ts";
+
+export function runCommonTests(convert: ConvertFnWithExecFile) {
+  test("convert resolves when execFile succeeds", async () => {
+    await runConvertSuccessTest(convert);
+  });
+
+  test("convert rejects when execFile fails", async () => {
+    await runConvertFailTest(convert);
+  });
+
+  test("convert logs stderr when present", async () => {
+    await runConvertLogsStderror(convert);
+  });
+
+  test("convert logs both stderr and stdout when present", async () => {
+    await runConvertLogsStderrorAndStdout(convert);
+  });
+}