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stack_test.go
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stack_test.go
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package algorithms
import (
"testing"
)
func TestStackCannotPushWhenZeroSize(t *testing.T) {
stack := NewStack(0)
if stack.Push("11") {
t.Fatalf("failed to push into a zero sized Stack\n")
}
}
func TestStackCanPushWhenEmpty(t *testing.T) {
stack := NewStack(2)
if stack.Push("first") == false {
t.Fatalf("failed to push when empty")
}
}
func TestStackCannotPushWhenFull(t *testing.T) {
stack := NewStack(2)
stack.Push("first")
stack.Push("second")
if stack.Push("third") == true {
t.Fatalf("failed to limit push when full")
}
}
func TestStackDisplaysCorrectPeekValues(t *testing.T) {
stack := NewStack(3)
stack.Push("first")
stack.Push("second")
stack.Push("third")
seen := stack.Peek()
if seen != "third" {
t.Fatalf("failed display current value \"%v\" with peek, returned %v instead\n", "first", seen)
}
stack.Pop()
if seen != "second" {
t.Fatalf("failed display current value \"%v\" with peek, returned %v instead\n", "second", seen)
}
stack.Pop()
if seen != "third" {
t.Fatalf("failed display current value \"%v\" with peek, returned %v instead\n", "third", seen)
}
}
func TestStackIsEmptyAfterPushAndPop(t *testing.T) {
stack := NewStack(3)
stack.Push("first")
stack.Pop()
if stack.IsEmpty() == false {
t.Fatalf("failed to return correct value of IsEmpty")
}
}
func TestStackIsNotEmptyAfterPushPushAndPop(t *testing.T) {
stack := NewStack(3)
stack.Push("first")
stack.Push("second")
stack.Pop()
if stack.IsEmpty() {
t.Fatalf("failed to return correct value of IsEmpty")
}
}