public void Returns_top_value_on_not_empty_stack()
{
var stack = Stack.Empty.Push(3).Push(17);
Assert.AreEqual(17, stack.Peek());
StackAssert.AreEqual(stack, 17, 3);
}
public void true_adds_1_to_top()
{
var stack = Stack
.Empty
.Push(true);
StackAssert.AreEqual(stack, 1);
}
public void false_adds_0_to_top()
{
var stack = Stack
.Empty
.Push(false);
StackAssert.AreEqual(stack, 0);
}
public void integer_adds_value_to_top()
{
var stack = Stack
.Empty
.Push(42);
StackAssert.AreEqual(stack, 42);
}
public void adds_copy_top_value_to_top()
{
var stack = Stack
.Empty
.Push(42)
.Duplicate();
StackAssert.AreEqual(stack, 42, 42);
}
public void top_value_not_zero_becomes_0()
{
var stack = Stack
.Empty
.Push(42)
.Not();
StackAssert.AreEqual(stack, 0);
}
public void top_value_0_becomes_1()
{
var stack = Stack
.Empty
.Push(0)
.Not();
StackAssert.AreEqual(stack, 1);
}
public void pops_top_values_and_pushes_subtraction()
{
var stack = Stack
.Empty
.Push(17)
.Push(25)
.Subtract();
StackAssert.AreEqual(stack, -8);
}
public void with_negative_value_pops_top_values_and_pushes_modulo()
{
var stack = Stack
.Empty
.Push(42)
.Push(-11)
.Modulo();
StackAssert.AreEqual(stack, 9);
}
public void with_postive_value_pops_top_values_and_pushes_modulo()
{
var stack = Stack
.Empty
.Push(-42)
.Push(5)
.Modulo();
StackAssert.AreEqual(stack, 3);
}
public void pops_top_values_and_pushes_division()
{
var stack = Stack
.Empty
.Push(42)
.Push(14)
.Divide();
StackAssert.AreEqual(stack, 3);
}
public void pops_top_values_and_pushes_product()
{
var stack = Stack
.Empty
.Push(17)
.Push(25)
.Multiply();
StackAssert.AreEqual(stack, 425);
}
public void pops_top_values_and_pushes_0_as_second_was_not_greater()
{
var stack = Stack
.Empty
.Push(42)
.Push(42)
.Greater();
StackAssert.AreEqual(stack, 0);
}
public void pops_top_values_and_pushes_sum()
{
var stack = Stack
.Empty
.Push(17)
.Push(25)
.Add();
StackAssert.AreEqual(stack, 42);
}
public void With_zero_rolls_keeps_same_order()
{
var stack = Stack.Empty
.Push(42)
.Push(17)
.Push(2)
.Push(0)
.Roll();
StackAssert.AreEqual(stack, 17, 42);
}
public void Iterates_from_top_to_bottom()
{
var stack = Stack.Empty
.Push(0)
.Push(1)
.Push(2)
.Push(3)
.Push(4)
.Push(5);
StackAssert.AreEqual(stack, 5, 4, 3, 2, 1, 0);
}
public void With_negative_rolls_moves_items_within_depth_range_down()
{
var stack = Stack
.Empty
.Push(666)
.Push(69)
.Push(17)
.Push(42)
.Push(3)
.Push(-1)
.Roll();
StackAssert.AreEqual(stack, 69, 42, 17, 666);
}
public void Removes_top_item_from_not_empty_stack()
{
var stack = Stack.Empty.Push(3).Push(17).Pop();
StackAssert.AreEqual(stack, 3);
}