From c6006b58d23aff7b23b1f1663f9a05c68d227b71 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Krzeslak?= <selanne08@gmx.de>
Date: Thu, 24 Jul 2025 19:53:22 +0200
Subject: [PATCH] test: add test case to libjxl.test.ts when input and output
 are not jxl

---
 tests/converters/libjxl.test.ts | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/tests/converters/libjxl.test.ts b/tests/converters/libjxl.test.ts
index 7caf0bb..c591570 100644
--- a/tests/converters/libjxl.test.ts
+++ b/tests/converters/libjxl.test.ts
@@ -82,3 +82,29 @@ test("convert uses cjxl with output filetype being jxl", async () => {
   expect(command).toEqual("cjxl");
   expect(loggedMessage).toBe("stdout: Fake stdout");
 });
+
+test("convert uses empty string as command with neither input nor output filetype being jxl", async () => {
+  const originalConsoleLog = console.log;
+
+  let loggedMessage = "";
+  console.log = (msg) => {
+    loggedMessage = msg;
+  };
+
+  const mockExecFile: ExecFileFn = (
+    _cmd: string,
+    _args: string[],
+    callback: (err: ExecFileException | null, stdout: string, stderr: string) => void,
+  ) => {
+    command = _cmd;
+    callback(null, "Fake stdout", "");
+  };
+
+  const result = await convert("input.png", "png", "jpg", "output.jpg", undefined, mockExecFile);
+
+  console.log = originalConsoleLog;
+
+  expect(result).toBe("Done");
+  expect(command).toEqual("");
+  expect(loggedMessage).toBe("stdout: Fake stdout");
+});