feat(calendar): Compute branches on Form (computeEF via temporalEF/precedenceEF)

1 files changed, 24 insertions, 0 deletions

diff --git a/internal/calendar/calendar_test.go b/internal/calendar/calendar_test.go
index 909f1d8..28dba9e 100644
--- a/internal/calendar/calendar_test.go
+++ b/internal/calendar/calendar_test.go
@@ -37,3 +37,27 @@ func TestComputeCycles(t *testing.T) {
 		t.Errorf("2025 weekday cycle = %s want I", got.WeekdayCycle)
 	}
 }
+
+func TestComputeEF(t *testing.T) {
+	sel := DefaultSelection()
+	sel.Form = "old"
+	// an EF layer with a I-class feast on 2025-08-15 (Assumption)
+	layer := Layer{ID: "tridentine", Type: "universal", Cels: map[string]RawCelebration{
+		"assumption": {Fields: map[string]string{
+			"date": "08-15", "rank": "class-1", "colour": "white", "name.en": "Assumption BVM",
+		}, Variants: map[string]map[string]string{}},
+	}}
+	got := Compute(d("2025-08-15"), sel, []Layer{layer})
+	if got.Observed.Slug != "assumption" || got.Observed.Rank != RankClass1 {
+		t.Fatalf("EF 2025-08-15 observed = %q/%v want assumption/class-1", got.Observed.Slug, got.Observed.Rank)
+	}
+	// the EF season on 2025-08-15 is Time after Pentecost (not OF's "ordinary")
+	if got.Season != TimeAfterPentecost {
+		t.Errorf("EF season = %s want time-after-pentecost", got.Season)
+	}
+	// OF path unchanged for the same date
+	ofDay := Compute(d("2025-08-15"), DefaultSelection(), []Layer{layer})
+	if ofDay.Season != Ordinary {
+		t.Errorf("OF season = %s want ordinary", ofDay.Season)
+	}
+}