feat(whitelist-snapshots): option for whitelisting snapshots

docs/rules/no-large-snapshots.md

@@ -98,7 +98,7 @@ line 4
 
 ## Options
 
-This rule has option for modifying the max number of lines allowed for a
+This rule has an option for modifying the max number of lines allowed for a
 snapshot:
 
 In an `eslintrc` file:
@@ -110,3 +110,25 @@ In an `eslintrc` file:
   }
 ...
 ```
+
+In addition there is an option for whitelisting large snapshot files. Since
+`//eslint` comments will be removed when a `.snap` file is updated, this option
+provides a way of whitelisting large snapshots. The list of whitelistedSnapshots
+is keyed first on the relative filepath of the snapshot file. You can then
+provide an array of strings to match the snapshot names against. If you're using
+a `.eslintrc.js` file, you can use regular expressions AND strings.
+
+In an `.eslintrc.js` file:
+
+```javascript
+...
+  "rules": {
+    "jest/no-large-snapshots": ["error",
+      {
+        "whitelistedSnapshots": {
+          "relative/path/to/file.js.snap": ["snapshot name 1", /a big snapshot \d+/]
+        }
+      }]
+  }
+...
+```

package.json

@@ -40,6 +40,7 @@
     "@babel/preset-env": "^7.4.4",
     "@commitlint/cli": "^8.0.0",
     "@commitlint/config-conventional": "^8.0.0",
+    "babel-eslint": "^10.0.2",
     "babel-jest": "^24.8.0",
     "eslint": "^5.1.0",
     "eslint-config-prettier": "^4.1.0",