squash! add tests for multi-line trailers

Author: aduh95

test/rules/line-length.js

@@ -169,6 +169,72 @@ Trailer: value
     tt.end()
   })
 
+  t.test('Multi-line trailers', (tt) => {
+    const v = new Validator()
+
+    const good = new Commit({
+      sha: 'f1496de5a7d5474e39eafaafe6f79befe5883a5b',
+      author: {
+        name: 'Jacob Smith',
+        email: '[email protected]',
+        date: '2025-12-22T09:40:42Z'
+      },
+      message: [
+        'subsystem: add support for foobar',
+        '',
+        'Lorem-Ipsum: dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna',
+        '  aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.',
+        '  Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint',
+        '  occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.'
+      ].join('\n')
+    }, v)
+    const tooLong = '  Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.'
+    const bad = new Commit({
+      sha: 'f1496de5a7d5474e39eafaafe6f79befe5883a5b',
+      author: {
+        name: 'Jacob Smith',
+        email: '[email protected]',
+        date: '2025-12-22T09:40:42Z'
+      },
+      message: [
+        'subsystem: add support for foobar',
+        '',
+        'Lorem-Ipsum: dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna',
+        '  aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.',
+        tooLong
+      ].join('\n')
+    }, v)
+
+    good.report = (opts) => {
+      tt.pass('called report')
+      tt.equal(opts.id, 'line-length', 'id')
+      tt.equal(opts.string, '', 'string')
+      tt.equal(opts.level, 'pass', 'level')
+    }
+    bad.report = (opts) => {
+      tt.pass('called report')
+      tt.equal(opts.id, 'line-length', 'id')
+      tt.equal(opts.message, 'Trailer should be <= 120 columns.', 'message')
+      tt.equal(opts.string, tooLong, 'string')
+      tt.equal(opts.level, 'fail', 'level')
+    }
+
+    Rule.validate(good, {
+      options: {
+        length: 72,
+        trailerLength: 120
+      }
+    })
+    Rule.validate(bad, {
+      options: {
+        length: 72,
+        trailerLength: 120
+      }
+    })
+
+    tt.end()
+  })
+
   t.test('Signed-off-by and Assisted-by trailers', (tt) => {
     const v = new Validator()