1 files changed, 42 insertions, 0 deletions
diff --git a/mobile/mobile_test.go b/mobile/mobile_test.go
new file mode 100644
index 0000000..c7df63c
--- /dev/null
+++ b/mobile/mobile_test.go
@@ -0,0 +1,42 @@
+package mobile
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func decodeDay(t *testing.T, s string) map[string]any {
+	t.Helper()
+	var m map[string]any
+	if err := json.Unmarshal([]byte(s), &m); err != nil {
+		t.Fatalf("Day returned invalid JSON: %v\n%s", err, s)
+	}
+	return m
+}
+
+func TestDayCarriesLocalisedRank(t *testing.T) {
+	pl := decodeDay(t, Day("2026-08-01", "of", "vul", "pl"))
+	if pl["rank"] != "memorial" {
+		t.Errorf("pl rank = %v, want memorial", pl["rank"])
+	}
+	if pl["rank_label"] != "wspomnienie obowiązkowe" {
+		t.Errorf("pl rank_label = %v", pl["rank_label"])
+	}
+	en := decodeDay(t, Day("2026-08-01", "of", "vul", "en"))
+	if en["rank_label"] != "memorial" {
+		t.Errorf("en rank_label = %v", en["rank_label"])
+	}
+}
+
+// The app shows the colour as a swatch and never as a word, so the raw key must
+// be present and no localised label may be. This test exists so the app cannot
+// quietly start depending on a colour word.
+func TestDayHasColourKeyButNoColourLabel(t *testing.T) {
+	m := decodeDay(t, Day("2026-08-01", "of", "vul", "pl"))
+	if m["colour"] != "white" {
+		t.Errorf("colour = %v, want white", m["colour"])
+	}
+	if _, present := m["colour_label"]; present {
+		t.Error("colour_label must not be returned: the app draws a swatch")
+	}
+}