From b1f70ec36cafadff11a201f2ebe3ac1aaa32ae6c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Krzeslak?= <selanne08@gmx.de>
Date: Thu, 24 Jul 2025 18:00:15 +0200
Subject: [PATCH] test: add unit test for potrace.ts

---
 src/converters/potrace.ts        |  5 +++--
 tests/converters/potrace.test.ts | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)
 create mode 100644 tests/converters/potrace.test.ts

diff --git a/src/converters/potrace.ts b/src/converters/potrace.ts
index cdf09cc..bc90503 100644
--- a/src/converters/potrace.ts
+++ b/src/converters/potrace.ts
@@ -1,4 +1,5 @@
-import { execFile } from "node:child_process";
+import { execFile as execFileOriginal } from "node:child_process";
+import { ExecFileFn } from "./types.ts";
 
 export const properties = {
   from: {
@@ -26,8 +27,8 @@ export function convert(
   fileType: string,
   convertTo: string,
   targetPath: string,
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   options?: unknown,
+  execFile: ExecFileFn = execFileOriginal,
 ): Promise<string> {
   return new Promise((resolve, reject) => {
     execFile("potrace", [filePath, "-o", targetPath, "-b", convertTo], (error, stdout, stderr) => {
diff --git a/tests/converters/potrace.test.ts b/tests/converters/potrace.test.ts
new file mode 100644
index 0000000..5f37450
--- /dev/null
+++ b/tests/converters/potrace.test.ts
@@ -0,0 +1,19 @@
+import { test } from "bun:test";
+import { convert } from "../../src/converters/potrace.ts";
+import {
+  runConvertFailTest,
+  runConvertLogsStderror,
+  runConvertSuccessTest,
+} from "./helpers/converters.ts";
+
+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);
+});