From f4da164dc5a77edca64d4ef82eb5db955bd804bf Mon Sep 17 00:00:00 2001
From: Turiiya <tobmoj@web.de>
Date: Mon, 29 Apr 2024 17:09:15 +0200
Subject: [PATCH] add tests, rebase for cleaner PR commit overview

---
 vlib/v/pref/pref_test.v | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/vlib/v/pref/pref_test.v b/vlib/v/pref/pref_test.v
index 5ce05dfc4f0e75..0d97ccee55d347 100644
--- a/vlib/v/pref/pref_test.v
+++ b/vlib/v/pref/pref_test.v
@@ -1,8 +1,40 @@
 module pref
 
+import v.vmod
+import os
+
 fn test_check_parametes() {
 	// reproducing issue https://github.com/vlang/v/issues/13983
 	_, cmd := parse_args_and_show_errors(['help'], [''], true)
 	// no command found from args
 	assert cmd == ''
 }
+
+fn test_version_falg() {
+	// Vars instead of consts to prevent dupl decls in pref.
+	vexe := @VEXE
+	vroot := os.dir(vexe)
+
+	v_ver := vmod.from_file(os.join_path(vroot, 'v.mod'))!.version
+	v_ver_cmd_res := os.execute_opt('${vexe} --version')!.output
+	assert v_ver_cmd_res.starts_with('V ${v_ver}'), v_ver_cmd_res
+
+	v_retry_ver_cmd_res := os.execute_opt('${vexe} retry --version')!.output
+	assert v_retry_ver_cmd_res != v_ver_cmd_res
+
+	v_git_ver_subcmd_res := os.execute_opt('${vexe} retry -- git --version')!.output
+	assert v_git_ver_subcmd_res !in [v_ver_cmd_res, v_retry_ver_cmd_res]
+
+	// Test version / verbosity toggle.
+	assert os.execute_opt('${vexe} -v')!.output == v_ver_cmd_res
+	assert os.execute_opt('${vexe} -cc tcc -v')!.output == v_ver_cmd_res
+
+	example_path := os.join_path(vroot, 'examples', 'hello_world.v')
+	v_verbose_cmd_res := os.execute_opt('${vexe} -v run ${example_path}')!.output
+	assert v_verbose_cmd_res != v_ver_cmd_res
+	assert v_verbose_cmd_res.contains('v.pref.lookup_path:')
+
+	v_verbose_cmd_with_additional_args_res := os.execute_opt('${vexe} -cc tcc -v run ${example_path}')!.output
+	assert v_verbose_cmd_with_additional_args_res != v_ver_cmd_res
+	assert v_verbose_cmd_with_additional_args_res.contains('v.pref.lookup_path:')
+}