faq/stack_test.go at master · eezhal92/faq · GitHub

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package faq

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestPushAndPeek(t *testing.T) {
	stack := Stack{}
	q1 := Question{
		Text:   "Who are you",
		Answer: "I'm a bot",
	}

	q2 := Question{
		Text:   "Where to apply new identity",
		Answer: "Please come to gov office",
	}

	stack.Push(q1)
	stack.Push(q2)

	assert.Equal(t, stack.Peek(0).(Question), q2)
	assert.Equal(t, stack.Peek(1).(Question), q1)
}

func TestPopAndLength(t *testing.T) {
	stack := Stack{}
	if stack.Length() != 0 {
		t.Errorf("length is not right %v", stack.Length())
	}

	q1 := Question{Text: "Who are you", Answer: "I'm a bot"}
	q2 := Question{Text: "Where to apply?", Answer: "Please come to gov office"}

	stack.Push(q1)
	stack.Push(q2)

	assert.Equal(t, stack.Pop().(Question), q2)
	assert.Equal(t, stack.Length(), 1)

	stack.Push(Question{Text: "a", Answer: "b"})
	stack.Push(Question{Text: "c", Answer: "d"})

	assert.Equal(t, stack.Length(), 3)
}