tdd whee

ledger/file.go

@@ -1,6 +1,8 @@
 package ledger
 
 import (
+	"errors"
+	"fmt"
 	"io"
 	"os"
 	"time"
@@ -36,6 +38,12 @@ func (file File) Deltas(like ...Like) ([]Delta, error) {
 			}
 		}
 		for currency, value := range sums {
+			if value == 0 {
+				continue
+			}
+			if transaction.payee == "" {
+				return nil, fmt.Errorf("didnt find net zero and no dumping ground payee set: %+v", transaction)
+			}
 			delta := newDelta(
 				transaction.date,
 				transaction.description,
@@ -64,6 +72,10 @@ type transactionRecipient struct {
 	currency string
 }
 
+func (t transaction) empty() bool {
+	return fmt.Sprint(t) == fmt.Sprint(transaction{})
+}
+
 func (file File) transactions() ([]transaction, error) {
 	f, err := os.Open(string(file))
 	if err != nil {
@@ -74,8 +86,10 @@ func (file File) transactions() ([]transaction, error) {
 	result := make([]transaction, 0)
 	for {
 		one, err := readTransaction(f)
-		result = append(result, one)
-		if err == io.EOF {
+		if !one.empty() {
+			result = append(result, one)
+		}
+		if errors.Is(err, io.EOF) {
 			return result, nil
 		}
 		if err != nil {