warn when a host's kernel has cgroup memory accounting disabled

tests/memory-support.test.ts

@@ -0,0 +1,32 @@
+import { describe, it, expect } from 'bun:test';
+import { memorySupportFromInfo, MEMORY_SUPPORT_DOC_URL } from '../src/lib/utils/memory-support';
+
+describe('memorySupportFromInfo', () => {
+	it('warns when MemoryLimit is false (cgroup memory off - Raspberry Pi case)', () => {
+		const r = memorySupportFromInfo({ MemoryLimit: false, SwapLimit: false });
+		expect(r.warn).toBe(true);
+		expect(r.memoryLimitSupported).toBe(false);
+	});
+
+	it('does not warn when MemoryLimit is true', () => {
+		const r = memorySupportFromInfo({ MemoryLimit: true, SwapLimit: true });
+		expect(r.warn).toBe(false);
+		expect(r.memoryLimitSupported).toBe(true);
+	});
+
+	it('treats a missing MemoryLimit as supported (no false alarm on older/partial info)', () => {
+		expect(memorySupportFromInfo({}).warn).toBe(false);
+		expect(memorySupportFromInfo(null).warn).toBe(false);
+		expect(memorySupportFromInfo(undefined).warn).toBe(false);
+	});
+
+	it('swap-only off does not warn (memory is what drives the 0 B display)', () => {
+		const r = memorySupportFromInfo({ MemoryLimit: true, SwapLimit: false });
+		expect(r.warn).toBe(false);
+		expect(r.swapLimitSupported).toBe(false);
+	});
+
+	it('doc url points at the manual anchor', () => {
+		expect(MEMORY_SUPPORT_DOC_URL).toBe('https://dockhand.pro/manual/#troubleshooting-rpi-memory');
+	});
+});