test: chatto date format output

cmd/cheapo/chatto_test.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"gogs.netdome.biz/paul/cheapo/internal/game"
+)
+
+func mustParse(s string) time.Time {
+	tt, err := time.Parse(time.RFC3339, s)
+	if err != nil {
+		panic(err)
+	}
+	return tt
+}
+
+func TestFormatGamesDefaultDate(t *testing.T) {
+	t.Setenv("CHEAPO_CHATTO_OUTPUT_DATE_FORMAT", "")
+	games := []game.Game{{Title: "G", Store: "epic", URL: "u", Kind: "free-now", EndDate: mustParse("2026-11-02T00:00:00Z")}}
+	out := formatGames(games, "")
+	if !strings.Contains(out, "until 02.11.2026") {
+		t.Fatalf("expected compact date, got:\n%s", out)
+	}
+}
+
+func TestFormatGamesCustomDate(t *testing.T) {
+	t.Setenv("CHEAPO_CHATTO_OUTPUT_DATE_FORMAT", "2006-01-02")
+	games := []game.Game{{Title: "G", Store: "epic", URL: "u", Kind: "free-now", EndDate: mustParse("2026-11-02T00:00:00Z")}}
+	out := formatGames(games, "")
+	if !strings.Contains(out, "until 2026-11-02") {
+		t.Fatalf("expected ISO date, got:\n%s", out)
+	}
+}