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package pointer
import (
"os"
"testing"
"git.adyxax.org/adyxax/gofunge/pkg/field"
"github.com/stretchr/testify/require"
)
func TestNewPointer(t *testing.T) {
require.Equal(t, NewPointer(), &Pointer{dx: 1, ss: NewStackStack()})
}
func TestSplit(t *testing.T) {
file, err := os.Open("../field/test_data/hello.b98")
require.NoError(t, err, "Failed to open file")
defer file.Close()
f, err := field.Load(file)
require.NoError(t, err)
p := NewPointer()
p2 := p.Split()
// We check that p2 is a real copy
p.Step(*f)
p2.Step(*f)
require.Equal(t, &Pointer{x: 1, y: 0, dx: 1, ss: NewStackStack()}, p)
require.Equal(t, &Pointer{x: 1, y: 0, dx: 1, ss: NewStackStack()}, p2)
}
func TestStep(t *testing.T) { // Step is thoroughly tested in the field package
defaultPointer := NewPointer()
// File of one char
file, err := os.Open("../field/test_data/minimal.b98")
require.NoError(t, err, "Failed to open file")
defer file.Close()
f, err := field.Load(file)
require.NoError(t, err)
p := NewPointer()
p.Step(*f)
require.Equal(t, defaultPointer, p)
}
func TestGet(t *testing.T) {
// File of one char
file, err := os.Open("../field/test_data/minimal.b98")
require.NoError(t, err, "Failed to open file")
defer file.Close()
f, err := field.Load(file)
p := NewPointer()
v := p.Get(*f)
require.Equal(t, int('@'), v)
}
func TestSet(t *testing.T) {
p := NewPointer()
p.Set(3, 14)
require.Equal(t, 3, p.x)
require.Equal(t, 14, p.y)
}
func TestRedirectTo(t *testing.T) {
p := NewPointer()
p.RedirectTo(3, 14)
require.Equal(t, 3, p.dx)
require.Equal(t, 14, p.dy)
}
func TestReverse(t *testing.T) {
p := NewPointer()
p.RedirectTo(3, 14)
p.Reverse()
require.Equal(t, -3, p.dx)
require.Equal(t, -14, p.dy)
}
func TestRedirect(t *testing.T) {
testCases := []struct {
name string
input byte
expectedDx int
expectedDy int
}{
{"up", '^', 0, -1},
{"right", '>', 1, 0},
{"down", 'v', 0, 1},
{"left", '<', -1, 0},
{"turn left", '[', 14, -3},
{"turn right", ']', -14, 3},
{"reverse", 'r', -3, -14},
{"redirectTo", 'x', 2, 7},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
p := NewPointer()
p.RedirectTo(3, 14)
p.ss.Push(2)
p.ss.Push(7)
v := p.Redirect(int(tc.input))
require.Equal(t, true, v)
require.Equal(t, tc.expectedDx, p.dx, "Invalid dx value")
require.Equal(t, tc.expectedDy, p.dy, "Invalid dy value")
})
}
// We cannot really test random, can we? This just gives coverage
p := NewPointer()
v := p.Redirect(int('?'))
require.Equal(t, true, v)
// A character that does not redirect should return false
require.Equal(t, false, p.Redirect(int('@')))
}
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