Include pre-uninstall script run into the unit test

arduino/cores/packagemanager/package_manager_test.go

@@ -930,29 +930,51 @@ func TestRunPostInstall(t *testing.T) {
 	// prepare dummy post install script
 	dir := paths.New(t.TempDir())
 
-	var scriptPath *paths.Path
+	var postScriptPath *paths.Path
+	var preScriptPath *paths.Path
 	var err error
 	if runtime.GOOS == "windows" {
-		scriptPath = dir.Join("post_install.bat")
+		postScriptPath = dir.Join("post_install.bat")
+		preScriptPath = dir.Join("pre_uninstall.bat")
 
-		err = scriptPath.WriteFile([]byte(
+		err = postScriptPath.WriteFile([]byte(
+			`@echo off
+			echo sent in stdout
+			echo sent in stderr 1>&2`))
+		require.NoError(t, err)
+		err = preScriptPath.WriteFile([]byte(
 			`@echo off
 			echo sent in stdout
 			echo sent in stderr 1>&2`))
 	} else {
-		scriptPath = dir.Join("post_install.sh")
-		err = scriptPath.WriteFile([]byte(
+		postScriptPath = dir.Join("post_install.sh")
+		preScriptPath = dir.Join("pre_uninstall.sh")
+		err = postScriptPath.WriteFile([]byte(
+			`#!/bin/sh
+			echo "sent in stdout"
+			echo "sent in stderr" 1>&2`))
+		require.NoError(t, err)
+		err = preScriptPath.WriteFile([]byte(
 			`#!/bin/sh
 			echo "sent in stdout"
 			echo "sent in stderr" 1>&2`))
 	}
 	require.NoError(t, err)
-	err = os.Chmod(scriptPath.String(), 0777)
+	err = os.Chmod(postScriptPath.String(), 0777)
+	require.NoError(t, err)
+	err = os.Chmod(preScriptPath.String(), 0777)
 	require.NoError(t, err)
 	stdout, stderr, err := pme.RunPreOrPostScript(dir, "post_install")
 	require.NoError(t, err)
 
 	// `HasPrefix` because windows seem to add a trailing space at the end
 	require.Equal(t, "sent in stdout", strings.Trim(string(stdout), "\n\r "))
 	require.Equal(t, "sent in stderr", strings.Trim(string(stderr), "\n\r "))
+
+	stdout, stderr, err = pme.RunPreOrPostScript(dir, "pre_uninstall")
+	require.NoError(t, err)
+
+	// `HasPrefix` because windows seem to add a trailing space at the end
+	require.Equal(t, "sent in stdout", strings.Trim(string(stdout), "\n\r "))
+	require.Equal(t, "sent in stderr", strings.Trim(string(stderr), "\n\r "))
 }