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database/conversation_turn_test.go

@@ -0,0 +1,39 @@
+package database
+
+import (
+	"testing"
+)
+
+func TestTurnSliceRange(t *testing.T) {
+	mk := func(id, role string) Message {
+		return Message{ID: id, Role: role}
+	}
+	msgs := []Message{
+		mk("u1", "user"),
+		mk("a1", "assistant"),
+		mk("u2", "user"),
+		mk("a2", "assistant"),
+	}
+	cases := []struct {
+		anchor string
+		start  int
+		end    int
+	}{
+		{"u1", 0, 2},
+		{"a1", 0, 2},
+		{"u2", 2, 4},
+		{"a2", 2, 4},
+	}
+	for _, tc := range cases {
+		s, e, err := turnSliceRange(msgs, tc.anchor)
+		if err != nil {
+			t.Fatalf("anchor %s: %v", tc.anchor, err)
+		}
+		if s != tc.start || e != tc.end {
+			t.Fatalf("anchor %s: got [%d,%d) want [%d,%d)", tc.anchor, s, e, tc.start, tc.end)
+		}
+	}
+	if _, _, err := turnSliceRange(msgs, "nope"); err == nil {
+		t.Fatal("expected error for missing id")
+	}
+}