package tokenize

import (
	"strings"
	"testing"
)

func SomeFunc1() {
	SomeFunc2()
}

func SomeFunc2() {
	SomeFunc3()
}

func SomeFunc3() {
	callerPanic("SomeFunc2", "{name} was called from {caller}")
}

func TestCallerPanic(t *testing.T) {
	defer func() {
		r := recover()
		err := r.(string)

		if !strings.Contains(err, "SomeFunc2 was called from") || !strings.Contains(err, "callerinfo_test.go:") {
			t.Fatalf("Unexpected error message: %s", err)
		}
	}()
	SomeFunc1()
}

func TestCallerBefore_WithFunctionNameNotInStack(t *testing.T) {
	caller := callerBefore("NotExistingAtAll")
	AssertEqual(t, "unknown caller", caller, "result for name not in stack")
}