From 1e7e6d8cec0bae3736ae2c8a84509b7dddc2525f Mon Sep 17 00:00:00 2001
From: Rafael Santana <rafaelsantana3095@gmail.com>
Date: Fri, 17 Sep 2021 12:10:19 -0300
Subject: [PATCH] fix(eslint-plugin): [consistent-type-definitions] correct fix
 for `export default`

---
 .../src/rules/consistent-type-definitions.ts  | 13 ++++++++++
 .../rules/consistent-type-definitions.test.ts | 26 ++++++++++++++++++-
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/packages/eslint-plugin/src/rules/consistent-type-definitions.ts b/packages/eslint-plugin/src/rules/consistent-type-definitions.ts
index f5b2c48a44f4..07d848db298a 100644
--- a/packages/eslint-plugin/src/rules/consistent-type-definitions.ts
+++ b/packages/eslint-plugin/src/rules/consistent-type-definitions.ts
@@ -122,6 +122,19 @@ export default util.createRule({
                     });
                   }
 
+                  if (
+                    node.parent?.type ===
+                    AST_NODE_TYPES.ExportDefaultDeclaration
+                  ) {
+                    fixes.push(
+                      fixer.removeRange([node.parent.range[0], node.range[0]]),
+                      fixer.insertTextAfter(
+                        node.body,
+                        `\nexport default ${node.id.name}`,
+                      ),
+                    );
+                  }
+
                   return fixes;
                 },
           });
diff --git a/packages/eslint-plugin/tests/rules/consistent-type-definitions.test.ts b/packages/eslint-plugin/tests/rules/consistent-type-definitions.test.ts
index 105c25724c23..f96672a213fc 100644
--- a/packages/eslint-plugin/tests/rules/consistent-type-definitions.test.ts
+++ b/packages/eslint-plugin/tests/rules/consistent-type-definitions.test.ts
@@ -1,5 +1,5 @@
 import rule from '../../src/rules/consistent-type-definitions';
-import { RuleTester, noFormat } from '../RuleTester';
+import { noFormat, RuleTester } from '../RuleTester';
 
 const ruleTester = new RuleTester({
   parser: '@typescript-eslint/parser',
@@ -281,5 +281,29 @@ declare global {
         },
       ],
     },
+    {
+      // https://github.com/typescript-eslint/typescript-eslint/issues/3894
+      code: `
+export default interface Test {
+  bar(): string;
+  foo(): number;
+}
+      `,
+      output: noFormat`
+type Test = {
+  bar(): string;
+  foo(): number;
+}
+export default Test
+      `,
+      options: ['type'],
+      errors: [
+        {
+          messageId: 'typeOverInterface',
+          line: 2,
+          column: 26,
+        },
+      ],
+    },
   ],
 });