1 files changed, 67 insertions, 0 deletions
diff --git a/pkg/pointer/mycology_test.go b/pkg/pointer/mycology_test.go
new file mode 100644
index 0000000..0fec52f
--- /dev/null
+++ b/pkg/pointer/mycology_test.go
@@ -0,0 +1,67 @@
+package pointer
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"git.adyxax.org/adyxax/gofunge98/pkg/field"
+	"github.com/stretchr/testify/require"
+)
+
+func TestMycology(t *testing.T) {
+	file, err := os.Open("../../mycology/mycology.b98")
+	if err != nil {
+		t.Skip("mycology test suite not found, skipping")
+	}
+
+	f, err := field.Load(file)
+	require.NoError(t, err)
+	p := NewPointer()
+	p.Argv = []string{"../../mycology/mycology.b98"}
+	output := ""
+	// TODO test expected output
+	p.CharacterOutput = func(c int) {
+		output += fmt.Sprintf("%c", c)
+	}
+	i := NewInterpreter(f, p)
+
+	v := i.Run()
+	require.Equal(t, 15, v)
+}
+
+type Interpreter struct {
+	f *field.Field
+	p *Pointer
+}
+
+func NewInterpreter(f *field.Field, p *Pointer) *Interpreter {
+	return &Interpreter{f: f, p: p}
+}
+
+func (i *Interpreter) Run() int {
+	for i.p != nil {
+		if v := i.step(); v != nil {
+			return *v
+		}
+	}
+	return 0
+}
+
+func (i *Interpreter) step() *int {
+	var prev *Pointer = nil
+	for p := i.p; p != nil; p = p.Next {
+		done, v := p.Exec(i.f)
+		if v != nil {
+			return v
+		}
+		if done {
+			if prev == nil {
+				i.p = p.Next
+			} else {
+				prev.Next = p.Next
+			}
+		}
+	}
+	return nil
+}