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v/cmd/tools/preludes/tests_assertions.v

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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 ...
// //////////////////////////////////////////////////////////////////
// TODO copy pasta builtin.v fn ___print_assert_failure
fn cb_assertion_failed(i &VAssertMetaInfo) {
use_color := term.can_show_color_on_stderr()
use_relative_paths := match os.getenv('VERROR_PATHS') {
'absolute' { false }
else { true }
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}
final_filename := if use_relative_paths { i.fpath } else { os.real_path(i.fpath) }
final_funcname := i.fn_name.replace('main.', '').replace('__', '.')
final_src := if use_color { term.bold(i.src) } else { i.src }
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eprintln('')
eprintln('$final_filename:${i.line_nr+1}: failed assert in function $final_funcname')
eprintln('Source : `$final_src`')
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if i.op.len > 0 && i.op != 'call' {
mut slvalue := '$i.lvalue'
mut srvalue := '$i.rvalue'
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// lpostfix := if slvalue == i.llabel { '.' } else { '<= `$i.llabel`' }
// rpostfix := if srvalue == i.rlabel { '.' } else { '<= `$i.rlabel`' }
if use_color {
slvalue = term.bold(term.yellow(slvalue))
srvalue = term.bold(term.yellow(srvalue))
}
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eprintln(' left value: $slvalue')
eprintln(' right value: $srvalue')
}
}
fn cb_assertion_ok(i &VAssertMetaInfo) {
// do nothing for now on an OK assertion
// println('OK ${(i.line_nr+1):5d}|${i.src}')
}