Began implementing the befunge field data structure

pkg/field/error_test.go

@@ -0,0 +1,20 @@
+package field
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func requireErrorTypeMatch(t *testing.T, err error, expected error) {
+	require.Equalf(t, reflect.TypeOf(err), reflect.TypeOf(expected), "Invalid error type. Got %s but expected %s", reflect.TypeOf(err), reflect.TypeOf(expected))
+}
+
+func TestErrorsCoverage(t *testing.T) {
+	readErr := ReadError{}
+	_ = readErr.Error()
+	_ = readErr.Unwrap()
+	decodeError := DecodeError{}
+	_ = decodeError.Error()
+}