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 ')
}