Add configuration and CLI foundation

internal/timeutil/parse_test.go

@@ -0,0 +1,49 @@
+package timeutil
+
+import (
+	"testing"
+	"time"
+)
+
+func TestLoadLocationAcceptsChicagoAlias(t *testing.T) {
+	location, err := LoadLocation("Chicago")
+	if err != nil {
+		t.Fatalf("LoadLocation() error = %v", err)
+	}
+	if location.String() != "America/Chicago" {
+		t.Fatalf("location = %q, want America/Chicago", location.String())
+	}
+}
+
+func TestParseLocalDate(t *testing.T) {
+	location := time.FixedZone("Test", -5*60*60)
+	got, err := ParseLocalDate("2026-05-29", location)
+	if err != nil {
+		t.Fatalf("ParseLocalDate() error = %v", err)
+	}
+	if got.Format(DateLayout) != "2026-05-29" {
+		t.Fatalf("date = %s, want 2026-05-29", got.Format(DateLayout))
+	}
+	if got.Location() != location {
+		t.Fatalf("location = %v, want test location", got.Location())
+	}
+}
+
+func TestParseStormTime(t *testing.T) {
+	location := time.FixedZone("Test", -5*60*60)
+	local, err := ParseStormTime("2026-05-29T18:00", location)
+	if err != nil {
+		t.Fatalf("ParseStormTime(local) error = %v", err)
+	}
+	if local.Location() != location {
+		t.Fatalf("local location = %v, want test location", local.Location())
+	}
+
+	rfc3339, err := ParseStormTime("2026-05-29T18:00:00-05:00", location)
+	if err != nil {
+		t.Fatalf("ParseStormTime(rfc3339) error = %v", err)
+	}
+	if rfc3339.Format(time.RFC3339) != "2026-05-29T18:00:00-05:00" {
+		t.Fatalf("rfc3339 = %s, want preserved offset time", rfc3339.Format(time.RFC3339))
+	}
+}