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package stack
import (
"os"
"testing"
"git.adyxax.org/adyxax/gofunge/pkg/field"
"git.adyxax.org/adyxax/gofunge/pkg/pointer"
"github.com/stretchr/testify/require"
)
func TestBegin(t *testing.T) {
t.Run("empty", func(t *testing.T) {
expected := NewStackStack()
expected.head = &Stack{data: make([]int, 0), next: expected.head}
expected.head.next.Push(0)
expected.head.next.Push(0)
expected.height++
ss := NewStackStack()
p := pointer.NewPointer()
ss.Begin(p)
require.Equal(t, expected, ss)
x, y := p.GetStorageOffset()
require.Equal(t, 1, x)
require.Equal(t, 0, y)
// Let's push another one
expected.head = &Stack{data: make([]int, 0), next: expected.head}
expected.head.next.Push(1)
expected.head.next.Push(0)
expected.height++
ss.Begin(p)
require.Equal(t, expected, ss)
x, y = p.GetStorageOffset()
require.Equal(t, 1, x)
require.Equal(t, 0, y)
})
t.Run("negative", func(t *testing.T) {
expected := NewStackStack()
expected.head = &Stack{size: 5, height: 5, data: make([]int, 5), next: expected.head}
expected.head.next.Push(0)
expected.head.next.Push(0)
expected.height++
p := pointer.NewPointer()
file, err := os.Open("../field/test_data/hello.b98")
require.NoError(t, err, "Failed to open file")
f, err := field.Load(file)
p.Step(*f)
ss := NewStackStack()
ss.head.Push(-5)
ss.Begin(p)
require.Equal(t, expected, ss)
x, y := p.GetStorageOffset()
require.Equal(t, 2, x)
require.Equal(t, 0, y)
})
t.Run("ask to copy more than we have", func(t *testing.T) {
expected := NewStackStack()
expected.head = &Stack{size: 34, height: 34, data: make([]int, 34), next: expected.head}
expected.head.data[33] = 18
expected.head.next.Push(18)
expected.head.next.Push(2)
expected.head.next.Push(3)
expected.height++
p := pointer.NewPointer()
p.SetStorageOffset(2, 3)
file, err := os.Open("../field/test_data/hello.b98")
require.NoError(t, err, "Failed to open file")
f, err := field.Load(file)
p.Step(*f)
ss := NewStackStack()
ss.head.Push(18)
ss.head.Push(34)
ss.Begin(p)
require.Equal(t, expected, ss)
x, y := p.GetStorageOffset()
require.Equal(t, 2, x)
require.Equal(t, 0, y)
})
t.Run("normal", func(t *testing.T) {
expected := NewStackStack()
expected.head = &Stack{size: 4, height: 4, data: []int{12, 14, -2, 5}, next: expected.head}
expected.head.next.Push(7)
expected.head.next.Push(12)
expected.head.next.Push(14)
expected.head.next.Push(-2)
expected.head.next.Push(5)
expected.head.next.Push(36)
expected.head.next.Push(42)
expected.height++
p := pointer.NewPointer()
p.SetStorageOffset(36, 42)
ss := NewStackStack()
ss.head.Push(7)
ss.head.Push(12)
ss.head.Push(14)
ss.head.Push(-2)
ss.head.Push(5)
ss.head.Push(4)
ss.Begin(p)
require.Equal(t, expected, ss)
})
}
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