1 files changed, 29 insertions, 0 deletions
diff --git a/internal/calendar/precedence_ef_test.go b/internal/calendar/precedence_ef_test.go
new file mode 100644
index 0000000..818b452
--- /dev/null
+++ b/internal/calendar/precedence_ef_test.go
@@ -0,0 +1,29 @@
+package calendar
+
+import "testing"
+
+func efCand(rank Rank, temporal bool) candidate {
+	return candidate{Cel: Celebration{Rank: rank}, Temporal: temporal}
+}
+
+func TestPrecedenceEF(t *testing.T) {
+	c1 := efCand(RankClass1, false)
+	c3 := efCand(RankClass3, false)
+	c4 := efCand(RankClass4, false)
+	comm := efCand(RankCommemoration, false)
+	if !(precedenceEF(c1) < precedenceEF(c3) && precedenceEF(c3) < precedenceEF(c4) && precedenceEF(c4) < precedenceEF(comm)) {
+		t.Error("EF class ordering broken (class-1 > class-3 > class-4 > commemoration)")
+	}
+	// at equal class, the temporal office wins.
+	temp := efCand(RankClass2, true)
+	saint := efCand(RankClass2, false)
+	obs, _ := pickEF([]candidate{saint, temp})
+	if !obs.Temporal {
+		t.Error("equal-class: temporal office should be observed")
+	}
+	// a I-class feast beats a II-class Sunday.
+	obs2, others := pickEF([]candidate{efCand(RankClass2, true), efCand(RankClass1, false)})
+	if obs2.Cel.Rank != RankClass1 || len(others) != 1 {
+		t.Errorf("I-class feast should win over II-class Sunday, got %+v", obs2.Cel)
+	}
+}