feat(fleet): refuse to destroy a server still holding a moved site's rollback

packages/ts-cloud/src/operations/drained-sites.test.tsadded+83-0

Changes to packages/ts-cloud/src/operations/drained-sites.test.ts

		@@ -0,0 +1,83 @@
	1	+import { describe, expect, it } from 'bun:test'
	2	+import { buildDrainedSiteScanScript, formatDrainedSiteRefusal, parseDrainedSites } from './drained-sites'
	3	+
	4	+describe('buildDrainedSiteScanScript', () => {
	5	+ it('scans this project\'s trees only', () => {
	6	+ const script = buildDrainedSiteScanScript('hq').join('\n')
	7	+ expect(script).toContain('/var/www/hq-*')
	8	+ expect(script).toContain('^hq-$TS_CLOUD_SITE[-@.]')
	9	+ })
	10	+
	11	+ /** A stray folder under /var/www must not block a teardown. */
	12	+ it('counts only directories that hold a release tree', () => {
	13	+ expect(buildDrainedSiteScanScript('hq').join('\n')).toContain('[ -d "$TS_CLOUD_DIR/releases" ] || continue')
	14	+ })
	15	+
	16	+ /**
	17	+ * A scan that could change the box would be a poor thing to run immediately
	18	+ * before deciding whether to keep it.
	19	+ */
	20	+ it('only reads', () => {
	21	+ const script = buildDrainedSiteScanScript('hq').join('\n')
	22	+ for (const mutation of ['rm ', 'systemctl stop', 'systemctl start', 'systemctl disable', 'systemctl enable', 'mv ', 'tar ']) {
	23	+ expect(script.includes(mutation)).toBe(false)
	24	+ }
	25	+ // Every redirect to a FILE goes to /dev/null (`>&1` duplicates a descriptor
	26	+ // rather than writing anywhere), so nothing lands on disk.
	27	+ for (const redirect of script.match(/>(?!&)\s*\S+/g) ?? []) {
	28	+ expect(redirect.replace(/^>\s*/, '')).toBe('/dev/null')
	29	+ }
	30	+ })
	31	+
	32	+ it('escapes a slug with regex metacharacters', () => {
	33	+ expect(buildDrainedSiteScanScript('my.app').join('\n')).toContain('^my\\.app-')
	34	+ })
	35	+
	36	+ it('always exits 0, so a scan is never mistaken for a failure', () => {
	37	+ expect(buildDrainedSiteScanScript('hq').at(-1)).toBe('exit 0')
	38	+ })
	39	+})
	40	+
	41	+describe('parseDrainedSites', () => {
	42	+ it('reports the trees with nothing running for them', () => {
	43	+ const drained = parseDrainedSites('site:bughq:no:1.2G\nsite:loghq:yes:800M')
	44	+ expect(drained).toEqual([{ name: 'bughq', size: '1.2G' }])
	45	+ })
	46	+
	47	+ /**
	48	+ * A site with something active is a site on a box being torn down — ordinary,
	49	+ * and already covered by the teardown's own confirmation.
	50	+ */
	51	+ it('ignores a site that is still running', () => {
	52	+ expect(parseDrainedSites('site:bughq:yes:1.2G')).toEqual([])
	53	+ })
	54	+
	55	+ it('is empty for a box with no trees, or no output at all', () => {
	56	+ expect(parseDrainedSites('')).toEqual([])
	57	+ expect(parseDrainedSites(undefined)).toEqual([])
	58	+ expect(parseDrainedSites('some unrelated chatter')).toEqual([])
	59	+ })
	60	+
	61	+ it('survives a missing size', () => {
	62	+ expect(parseDrainedSites('site:bughq:no:')).toEqual([{ name: 'bughq', size: '?' }])
	63	+ })
	64	+})
	65	+
	66	+describe('formatDrainedSiteRefusal', () => {
	67	+ it('names the sites, what the files are for, and the way forward', () => {
	68	+ const message = formatDrainedSiteRefusal([{ name: 'bughq', size: '1.2G' }], 'hq', '--discard-drained-sites')
	69	+ expect(message).toContain('hq-bughq (1.2G)')
	70	+ expect(message).toContain('they are the rollback')
	71	+ expect(message).toContain('--discard-drained-sites')
	72	+ })
	73	+
	74	+ it('reads correctly for several', () => {
	75	+ const message = formatDrainedSiteRefusal(
	76	+ [{ name: 'a', size: '1G' }, { name: 'b', size: '2G' }],
	77	+ 'hq',
	78	+ '--discard-drained-sites',
	79	+ )
	80	+ expect(message).toContain('2 site trees')
	81	+ expect(message).toContain('for them')
	82	+ })
	83	+})