fix: use test -f instead of cat for file existence checks in snap tests

Alpine's cat outputs "can't open" while GNU cat outputs "No such file
or directory". Use test ! -f which is portable and produces no output.

Author: fengmk2

packages/cli/snap-tests-global/command-pack-exe/steps.json

@@ -9,14 +9,6 @@
   "env": {
     "VITE_DISABLE_AUTO_INSTALL": "1"
   },
-  "commands": [
-    "vp pack src/index.ts --exe 2>&1",
-    "ls dist",
-    "ls build",
-    "./build/index"
-  ],
-  "after": [
-    "rm -rf dist",
-    "rm -rf build"
-  ]
+  "commands": ["vp pack src/index.ts --exe 2>&1", "ls dist", "ls build", "./build/index"],
+  "after": ["rm -rf dist", "rm -rf build"]
 }

packages/cli/snap-tests-global/migration-already-vite-plus/steps.json

@@ -1,7 +1,5 @@
 {
-  "commands": [
-    "vp migrate --no-interactive # should detect existing vite-plus and exit"
-  ],
+  "commands": ["vp migrate --no-interactive # should detect existing vite-plus and exit"],
   "ignoredPlatforms": [
     {
       "os": "linux",

packages/cli/snap-tests-global/migration-auto-create-vite-config/snap.txt

@@ -30,11 +30,9 @@ export default defineConfig({
   },
 });
 
-> cat .oxlintrc.json && exit 1 || true # check .oxlintrc.json is removed
-cat: .oxlintrc.json: No such file or directory
+> test ! -f .oxlintrc.json # check .oxlintrc.json is removed
 
-> cat .oxfmtrc.json && exit 1 || true # check .oxfmtrc.json is removed
-cat: .oxfmtrc.json: No such file or directory
+> test ! -f .oxfmtrc.json # check .oxfmtrc.json is removed
 
 > cat package.json # check package.json
 {

packages/cli/snap-tests-global/migration-auto-create-vite-config/steps.json

@@ -2,8 +2,8 @@
   "commands": [
     "vp migrate --no-interactive 2>&1 # migration should auto create vite.config.ts and remove oxlintrc and oxfmtrc",
     "cat vite.config.ts # check vite.config.ts",
-    "cat .oxlintrc.json && exit 1 || true # check .oxlintrc.json is removed",
-    "cat .oxfmtrc.json && exit 1 || true # check .oxfmtrc.json is removed",
+    "test ! -f .oxlintrc.json # check .oxlintrc.json is removed",
+    "test ! -f .oxfmtrc.json # check .oxfmtrc.json is removed",
     "cat package.json # check package.json"
   ]
 }

packages/cli/snap-tests-global/migration-baseurl-tsconfig/snap.txt

@@ -23,8 +23,7 @@ export default defineConfig({
   },
 });
 
-> cat .oxlintrc.json && exit 1 || true # check .oxlintrc.json is removed
-cat: .oxlintrc.json: No such file or directory
+> test ! -f .oxlintrc.json # check .oxlintrc.json is removed
 
 > cat package.json # check package.json
 {

packages/cli/snap-tests-global/migration-baseurl-tsconfig/steps.json

@@ -2,7 +2,7 @@
   "commands": [
     "vp migrate --no-interactive # migration should skip typeAware/typeCheck when tsconfig has baseUrl",
     "cat vite.config.ts # check vite.config.ts — should NOT have typeAware or typeCheck",
-    "cat .oxlintrc.json && exit 1 || true # check .oxlintrc.json is removed",
+    "test ! -f .oxlintrc.json # check .oxlintrc.json is removed",
     "cat package.json # check package.json"
   ]
 }

packages/cli/snap-tests-global/migration-eslint-monorepo/snap.txt

@@ -50,5 +50,4 @@ VITE+ - The Unified Toolchain for the Web
   "devDependencies": {}
 }
 
-> cat eslint.config.mjs && exit 1 || true # check root eslint config is removed
-cat: eslint.config.mjs: No such file or directory
+> test ! -f eslint.config.mjs # check root eslint config is removed

packages/cli/snap-tests-global/migration-eslint-monorepo/steps.json

@@ -4,6 +4,6 @@
     "cat package.json # check root eslint removed and scripts rewritten",
     "cat packages/app/package.json # check app eslint removed and scripts rewritten",
     "cat packages/utils/package.json # check utils eslint removed and scripts rewritten",
-    "cat eslint.config.mjs && exit 1 || true # check root eslint config is removed"
+    "test ! -f eslint.config.mjs # check root eslint config is removed"
   ]
 }

packages/cli/snap-tests-global/migration-eslint-npx-wrapper/snap.txt

@@ -31,5 +31,4 @@ VITE+ - The Unified Toolchain for the Web
   }
 }
 
-> cat eslint.config.mjs && exit 1 || true # check eslint config is removed
-cat: eslint.config.mjs: No such file or directory
+> test ! -f eslint.config.mjs # check eslint config is removed

packages/cli/snap-tests-global/migration-eslint-npx-wrapper/steps.json

@@ -2,6 +2,6 @@
   "commands": [
     "vp migrate --no-interactive # migration should rewrite bare eslint but leave npx wrappers unchanged",
     "cat package.json # check eslint removed, bare eslint rewritten, npx/pnpm exec/bunx wrappers unchanged",
-    "cat eslint.config.mjs && exit 1 || true # check eslint config is removed"
+    "test ! -f eslint.config.mjs # check eslint config is removed"
   ]
 }