v/vlib/compiler/preludes/tests_assertions.v

module main

import os
import term
// //////////////////////////////////////////////////////////////////
// / This file will get compiled as part of the main program,
// / for a _test.v file.
// / The methods defined here are called back by the test program's
// / assert statements, on each success/fail. The goal is to make
// / customizing the look & feel of the assertions results easier,
// / since it is done in normal V code, instead of in embedded C ...
// //////////////////////////////////////////////////////////////////
fn cb_assertion_failed(filename string, line int, sourceline string, funcname string) {
	color_on := term.can_show_color_on_stderr()
	use_relative_paths := match os.getenv('VERROR_PATHS') {
		'absolute'{
			false
		}
		else {
			true}}
	final_filename := if use_relative_paths { filename } else { os.realpath(filename) }
	final_funcname := funcname.replace('main__', '').replace('__', '.')
	mut fail_message := 'FAILED assertion'
	if color_on {
		fail_message = term.bold(term.red(fail_message))
	}
	eprintln('$final_filename:$line: $fail_message')
	eprintln('Function: $final_funcname')
	eprintln('Source  : $sourceline')
}

fn cb_assertion_ok(filename string, line int, sourceline string, funcname string) {
	// do nothing for now on an OK assertion
	// println('OK ${line:5d}|$sourceline ')
}