add arrowheads sketch test

d2renderers/d2sketch/sketch_test.go

@@ -280,6 +280,51 @@ shipments.order_id <-> orders.id`,
   +getJobs(): "Job[]"
   +setTimeout(seconds int)
 }
+`,
+		},
+		{
+			name: "arrowheads",
+			script: `
+a.0 <-> b.0: <->
+a.1 -- b.1: --
+a.2 <-> b.2: arrow {
+	source-arrowhead.shape: arrow
+	target-arrowhead.shape: arrow
+}
+a.3 <-> b.3: triangle {
+	source-arrowhead.shape: triangle
+	target-arrowhead.shape: triangle
+}
+a.4 <-> b.4: diamond {
+	source-arrowhead.shape: diamond
+	target-arrowhead.shape: diamond
+}
+a.5 <-> b.5: diamond filled {
+	source-arrowhead: {
+		shape: diamond
+		style.filled: true
+	}
+	target-arrowhead: {
+		shape: diamond
+		style.filled: true
+	}
+}
+a.6 <-> b.6: cf-many {
+	source-arrowhead.shape: cf-many
+	target-arrowhead.shape: cf-many
+}
+a.7 <-> b.7: cf-many-required {
+	source-arrowhead.shape: cf-many-required
+	target-arrowhead.shape: cf-many-required
+}
+a.8 <-> b.8: cf-one {
+	source-arrowhead.shape: cf-one
+	target-arrowhead.shape: cf-one
+}
+a.9 <-> b.9: cf-one-required {
+	source-arrowhead.shape: cf-one-required
+	target-arrowhead.shape: cf-one-required
+}
 `,
 		},
 	}