test(macos): boost Clawdis coverage to 40%

apps/macos/Tests/ClawdisIPCTests/CritterIconRendererTests.swift

@@ -0,0 +1,34 @@
+import AppKit
+import Testing
+@testable import Clawdis
+
+@Suite
+@MainActor
+struct CritterIconRendererTests {
+    @Test func makeIconRendersExpectedSize() {
+        let image = CritterIconRenderer.makeIcon(
+            blink: 0.25,
+            legWiggle: 0.5,
+            earWiggle: 0.2,
+            earScale: 1,
+            earHoles: true,
+            badge: nil)
+
+        #expect(image.size.width == 18)
+        #expect(image.size.height == 18)
+        #expect(image.tiffRepresentation != nil)
+    }
+
+    @Test func makeIconRendersWithBadge() {
+        let image = CritterIconRenderer.makeIcon(
+            blink: 0,
+            legWiggle: 0,
+            earWiggle: 0,
+            earScale: 1,
+            earHoles: false,
+            badge: .init(symbolName: "terminal.fill", prominence: .primary))
+
+        #expect(image.tiffRepresentation != nil)
+    }
+}
+