func main() {
var haystack stack.Stack
haystack.Push("hay")
haystack.Push(-15)
haystack.Push([]string{"pin", "clip", "needle"})
haystack.Push(81.52)
for {
item, err := haystack.Pop()
if err != nil {
break
}
fmt.Println(item)
}
var aStack stack.Stack
aStack.Push("Aarvark")
aStack.Push(5)
aStack.Push(19)
x, err := aStack.Top()
fmt.Println(x)
aStack.Push(-6e-4)
aStack.Push("Baker")
aStack.Push(-3)
aStack.Push("Cake")
aStack.Push("Dancer")
x, err = aStack.Top()
fmt.Println(x)
aStack.Push(11.7)
fmt.Println("stack is empty", aStack.IsEmpty())
fmt.Printf("Len() == %d Cap == %d\n", aStack.Len(), aStack.Cap())
difference := aStack.Cap() - aStack.Len()
for i := 0; i < difference; i++ {
aStack.Push(strings.Repeat("*", difference-i))
}
fmt.Printf("Len() == %d Cap == %d\n", aStack.Len(), aStack.Cap())
for aStack.Len() > 0 {
x, _ = aStack.Pop()
fmt.Printf("%T %v\n", x, x)
}
fmt.Println("stack is empty", aStack.IsEmpty())
x, err = aStack.Pop()
fmt.Println(x, err)
x, err = aStack.Top()
fmt.Println(x, err)
}
func TestStack(t *testing.T) {
count := 1
var aStack stack.Stack
assertTrue(t, aStack.Len() == 0, "expected empty Stack", count)
count++
assertTrue(t, aStack.Cap() == 0, "expected empty Stack", count)
count++
assertTrue(t, aStack.IsEmpty(), "expected empty Stack", count)
count++
value, err := aStack.Pop()
assertTrue(t, value == nil, "expected nil value", count)
count++
assertTrue(t, err != nil, "expected error", count)
count++
value1, err := aStack.Top()
assertTrue(t, value1 == nil, "expected nil value", count)
count++
assertTrue(t, err != nil, "expected error", count)
count++
aStack.Push(1)
aStack.Push(2)
aStack.Push("three")
assertTrue(t, aStack.Len() == 3, "expected nonempty Stack", count) // 8
count++
assertTrue(t, aStack.IsEmpty() == false, "expected nonempty Stack",
count) // 9
count++
value2, err := aStack.Pop()
assertEqualString(t, value2.(string), "three", "unexpected text",
count) // 10
count++
assertTrue(t, err == nil, "no error expected", count) // 11
count++
value3, err := aStack.Top()
assertTrue(t, value3 == 2, "unexpected number", count) // 12
count++
assertTrue(t, err == nil, "no error expected", count) // 13
count++
aStack.Pop()
assertTrue(t, aStack.Len() == 1, "expected nonempty Stack", count) //14
count++
assertTrue(t, aStack.IsEmpty() == false, "expected nonempty Stack",
count) // 15
count++
value4, err := aStack.Pop()
assertTrue(t, value4 == 1, "unexpected number", count) // 16
count++
assertTrue(t, err == nil, "no error expected", count) // 17
count++
assertTrue(t, aStack.Len() == 0, "expected empty Stack", count) // 18
count++
assertTrue(t, aStack.IsEmpty(), "expected empty Stack", count) // 19
count++
}