helper_test.go

package main

// See https://github.com/benbjohnson/testing

import (
	"fmt"
	"path/filepath"
	"reflect"
	"runtime"
	"testing"
)

// assert fails the test if the condition is false.
func assert(tb testing.TB, condition bool, msg string, v ...interface{}) {
	if !condition {
		_, file, line, _ := runtime.Caller(1)
		fmt.Printf("\033[31m%s:%d: "+msg+"\033[39m\n\n", append([]interface{}{filepath.Base(file), line}, v...)...)
		tb.FailNow()
	}
}

// ok fails the test if an err is not nil.
func ok(tb testing.TB, err error) {
	if err != nil {
		_, file, line, _ := runtime.Caller(1)
		fmt.Printf("\033[31m%s:%d: unexpected error: %s\033[39m\n\n", filepath.Base(file), line, err.Error())
		tb.FailNow()
	}
}

// equals fails the test if exp is not equal to act.
func equals(tb testing.TB, exp, act interface{}) {
	if !reflect.DeepEqual(exp, act) {
		_, file, line, _ := runtime.Caller(1)
		fmt.Printf("\033[31m%s:%d:\n\n\texp: %#v\n\n\tgot: %#v\033[39m\n\n", filepath.Base(file), line, exp, act)
		tb.FailNow()
	}
}

// panics calls f, which must be a function of no arguments, and fails unless it panics.
func panics(tb testing.TB, f interface{}) {
	rv := reflect.ValueOf(f)
	rt := rv.Type()
	if rt.Kind() != reflect.Func || rt.NumIn() != 0 {
		panic("panics() must be called with a function of 0 arguments")
	}

	defer func() {
		if err := recover(); err == nil {
			_, file, line, _ := runtime.Caller(2)
			fmt.Printf("\033[31m%s:%d:\n\n\texpected to panic but did not\033[39m\n\n", filepath.Base(file), line)
			tb.FailNow()
		}
	}()

	rv.Call(nil)
}