feat(no-large-snapshots): add setting to define maxSize by snapshot t…

…ype (#524)

* feat(no-large-snapshots): add setting to define maxSize by snapshot type

* chore(no-large-snapshot): refactor to remove externalMaxSize option

docs/rules/no-large-snapshots.md

@@ -98,19 +98,27 @@ line 4
 
 ## Options
 
-This rule has an option for modifying the max number of lines allowed for a
+This rule has options for modifying the max number of lines allowed for a
 snapshot:
 
 In an `eslintrc` file:
 
 ```json
 ...
   "rules": {
-    "jest/no-large-snapshots": ["warn", { "maxSize": 12 }]
+    "jest/no-large-snapshots": ["warn", { "maxSize": 12, "inlineMaxSize": 6 }]
   }
 ...
 ```
 
+Max number of lines allowed could be defined by snapshot type (Inline and
+External). Use `inlineMaxSize` for
+[Inline Snapshots](https://jestjs.io/docs/en/snapshot-testing#inline-snapshots)
+size and `maxSize` for
+[External Snapshots](https://jestjs.io/docs/en/snapshot-testing#snapshot-testing-with-jest).
+If only `maxSize` is provided on options, the value of `maxSize` will be used to
+both snapshot types (Inline and External).
+
 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

src/rules/__tests__/no-large-snapshots.test.ts

@@ -46,6 +46,25 @@ ruleTester.run('no-large-snapshots', rule, {
       filename: 'mock.jsx',
       code: generateExpectInlineSnapsCode(50, 'toMatchInlineSnapshot'),
     },
+    {
+      filename: 'mock.jsx',
+      code: generateExpectInlineSnapsCode(20, 'toMatchInlineSnapshot'),
+      options: [
+        {
+          maxSize: 19,
+          inlineMaxSize: 21,
+        },
+      ],
+    },
+    {
+      filename: 'mock.jsx',
+      code: generateExpectInlineSnapsCode(60, 'toMatchInlineSnapshot'),
+      options: [
+        {
+          maxSize: 61,
+        },
+      ],
+    },
     {
       // "should not report if node has fewer lines of code than limit"
       filename: '/mock-component.jsx.snap',
@@ -63,6 +82,16 @@ ruleTester.run('no-large-snapshots', rule, {
         },
       ],
     },
+    {
+      filename: '/mock-component.jsx.snap',
+      code: generateExportsSnapshotString(20),
+      options: [
+        {
+          maxSize: 21,
+          inlineMaxSize: 19,
+        },
+      ],
+    },
   ],
   invalid: [
     {
@@ -88,6 +117,20 @@ ruleTester.run('no-large-snapshots', rule, {
         },
       ],
     },
+    {
+      filename: 'mock.js',
+      code: generateExpectInlineSnapsCode(
+        50,
+        'toThrowErrorMatchingInlineSnapshot',
+      ),
+      options: [{ maxSize: 51, inlineMaxSize: 50 }],
+      errors: [
+        {
+          messageId: 'tooLongSnapshots',
+          data: { lineLimit: 50, lineCount: 51 },
+        },
+      ],
+    },
     {
       // "should report if node has more than 50 lines of code, and no sizeThreshold option is passed"
       filename: '/mock-component.jsx.snap',
@@ -111,6 +154,17 @@ ruleTester.run('no-large-snapshots', rule, {
         },
       ],
     },
+    {
+      filename: '/mock-component.jsx.snap',
+      code: generateExportsSnapshotString(100),
+      options: [{ maxSize: 70, inlineMaxSize: 101 }],
+      errors: [
+        {
+          messageId: 'tooLongSnapshots',
+          data: { lineLimit: 70, lineCount: 100 },
+        },
+      ],
+    },
     {
       // "should report if maxSize is zero"
       filename: '/mock-component.jsx.snap',

src/rules/no-large-snapshots.ts

@@ -13,6 +13,7 @@ import {
 
 interface RuleOptions {
   maxSize?: number;
+  inlineMaxSize?: number;
   whitelistedSnapshots?: Record<string, Array<string | RegExp>>;
 }
 
@@ -92,6 +93,9 @@ export default createRule<[RuleOptions], MessageId>({
           maxSize: {
             type: 'number',
           },
+          inlineMaxSize: {
+            type: 'number',
+          },
           whitelistedSnapshots: {
             type: 'object',
             patternProperties: {
@@ -125,7 +129,10 @@ export default createRule<[RuleOptions], MessageId>({
                 'toThrowErrorMatchingInlineSnapshot',
               ))
           ) {
-            reportOnViolation(context, node, options);
+            reportOnViolation(context, node, {
+              ...options,
+              maxSize: options.inlineMaxSize ?? options.maxSize,
+            });
           }
         },
       };