fix(snapshot): make inline comment-skip regex non-greedy

packages/snapshot/src/port/inlineSnapshot.ts

@@ -50,7 +50,7 @@ export async function saveInlineSnapshots(
 }
 
 const defaultStartObjectRegex
-  = /(?:toMatchInlineSnapshot|toThrowErrorMatchingInlineSnapshot)\s*\(\s*(?:\/\*[\s\S]*\*\/\s*|\/\/.*(?:[\n\r\u2028\u2029]\s*|[\t\v\f \xA0\u1680\u2000-\u200A\u202F\u205F\u3000\uFEFF]))*\{/
+  = /(?:toMatchInlineSnapshot|toThrowErrorMatchingInlineSnapshot)\s*\(\s*(?:\/\*[\s\S]*?\*\/\s*|\/\/.*(?:[\n\r\u2028\u2029]\s*|[\t\v\f \xA0\u1680\u2000-\u200A\u202F\u205F\u3000\uFEFF]))*\{/
 
 function escapeRegExp(s: string): string {
   return s.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
@@ -160,7 +160,7 @@ function getCodeStartingAtIndex(code: string, index: number, methodNames: string
 }
 
 const defaultStartRegex
-  = /(?:toMatchInlineSnapshot|toThrowErrorMatchingInlineSnapshot)\s*\(\s*(?:\/\*[\s\S]*\*\/\s*|\/\/.*(?:[\n\r\u2028\u2029]\s*|[\t\v\f \xA0\u1680\u2000-\u200A\u202F\u205F\u3000\uFEFF]))*[\w$]*(['"`)])/
+  = /(?:toMatchInlineSnapshot|toThrowErrorMatchingInlineSnapshot)\s*\(\s*(?:\/\*[\s\S]*?\*\/\s*|\/\/.*(?:[\n\r\u2028\u2029]\s*|[\t\v\f \xA0\u1680\u2000-\u200A\u202F\u205F\u3000\uFEFF]))*[\w$]*(['"`)])/
 
 const buildStartRegex = memo((assertionName: string) => {
   const replaced = defaultStartRegex.source.replace(

test/e2e/snapshots/fixtures/inline-multiple-calls/comment-directive.test.ts

@@ -0,0 +1,7 @@
+import { expect, test } from 'vitest'
+
+test('block-comment directives, multiple calls', () => {
+  expect('alpha').toMatchInlineSnapshot(/* HTML */`"alpha"`)
+  expect('beta').toMatchInlineSnapshot(/* HTML */`"beta"`)
+  expect('gamma').toMatchInlineSnapshot(/* HTML */`"gamma"`)
+})

test/e2e/snapshots/inline-comment-directive.test.ts

@@ -0,0 +1,33 @@
+import fs from 'node:fs'
+import { join } from 'pathe'
+import { expect, test } from 'vitest'
+import { editFile, runVitest } from '../../test-utils'
+
+// Regression for the greedy comment-skip in the inline-snapshot updater
+// regexes (packages/snapshot/src/port/inlineSnapshot.ts). With multiple
+// `toMatchInlineSnapshot(/* … */)` calls carrying block-comment directives
+// in one file, the greedy `\/\*[\s\S]*\*\/` matched from the FIRST `/*` to
+// the LAST `*/`, so every earlier call's write coalesced onto the last
+// call's location. On update only the last snapshot was written, mangled
+// (`/* HTML */`"alpha"``"beta"``"gamma"`), and the earlier calls were left
+// empty — silently. The fix makes the comment-skip lazy (`[\s\S]*?`).
+
+test('multiple block-comment directives each get written on update', async () => {
+  const root = join(import.meta.dirname, 'fixtures/inline-multiple-calls')
+  const testFile = join(root, 'comment-directive.test.ts')
+
+  // reset: clear each snapshot to the empty `(/* HTML */)` form that triggers
+  // the bug, keeping its directive
+  editFile(testFile, s =>
+    s.replace(/toMatchInlineSnapshot\(\/\* HTML \*\/`[^`]*`\)/g, 'toMatchInlineSnapshot(/* HTML */)'))
+
+  const vitest = await runVitest({ root, include: [testFile], update: true })
+  expect(vitest.stderr).toBe('')
+
+  // Each call gets its own snapshot, on its own line. Pre-fix, only the last
+  // (`gamma`) landed — and mangled — while `alpha`/`beta` stayed empty.
+  const content = fs.readFileSync(testFile, 'utf-8')
+  expect(content).toContain('toMatchInlineSnapshot(/* HTML */`"alpha"`)')
+  expect(content).toContain('toMatchInlineSnapshot(/* HTML */`"beta"`)')
+  expect(content).toContain('toMatchInlineSnapshot(/* HTML */`"gamma"`)')
+})