package parse

// This file contains some tools that are used for writing tests.

import (
	"regexp"
	"testing"
)

func AssertEqual(t *testing.T, expected interface{}, actual interface{}, forWhat string) {
	if expected != actual {
		t.Errorf(
			"Unexpected value for %s:\nexpected: %q\nactual: %q",
			forWhat, expected, actual)
	}
}

func AssertTrue(t *testing.T, b bool, assertion string) {
	if !b {
		t.Errorf("Assertion %s is false", assertion)
	}
}

type PanicT struct {
	Function func()
	Regexp   bool
	Expect   string
}

func AssertPanics(t *testing.T, testSet []PanicT) {
	for _, test := range testSet {
		AssertPanic(t, test)
	}
}

func AssertPanic(t *testing.T, p PanicT) {
	defer func() {
		if r := recover(); r != nil {
			mismatch := false
			if p.Regexp && !regexp.MustCompile(p.Expect).MatchString(r.(string)) {
				mismatch = true
			}
			if !p.Regexp && p.Expect != r.(string) {
				mismatch = true
			}
			if mismatch {
				t.Errorf(
					"Code did panic, but unexpected panic message received:\nexpected: %q\nactual: %q",
					p.Expect, r)
			}
		} else {
			t.Errorf("Function did not panic (expected panic message: %s)", p.Expect)
		}
	}()
	p.Function()
}