From b9e735a199cfe24a75b057bd0062c80e4dc69f8b Mon Sep 17 00:00:00 2001
From: Dave Dunkin <dave.dunkin@logos.com>
Date: Wed, 29 Nov 2017 22:41:30 -0700
Subject: [PATCH] Fix: Use TSAbstractFunctionExpression for abstract methods.

Fixes crash in indent rule. Related to #253.
---
 lib/ast-node-types.js                      | 1 +
 lib/convert.js                             | 5 +++--
 tests/lib/__snapshots__/typescript.js.snap | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/ast-node-types.js b/lib/ast-node-types.js
index 373ba72..dfb6de2 100644
--- a/lib/ast-node-types.js
+++ b/lib/ast-node-types.js
@@ -102,6 +102,7 @@ module.exports = {
      * TS-prefixed nodes
      */
     TSAbstractClassProperty: "TSAbstractClassProperty",
+    TSAbstractFunctionExpression: "TSAbstractFunctionExpression",
     TSAbstractKeyword: "TSAbstractKeyword",
     TSAbstractMethodDefinition: "TSAbstractMethodDefinition",
     TSAnyKeyword: "TSAnyKeyword",
diff --git a/lib/convert.js b/lib/convert.js
index 243cd65..da709f1 100644
--- a/lib/convert.js
+++ b/lib/convert.js
@@ -868,8 +868,9 @@ module.exports = function convert(config) {
 
             const methodLoc = ast.getLineAndCharacterOfPosition(openingParen.getStart()),
                 nodeIsMethod = (node.kind === SyntaxKind.MethodDeclaration),
+                isMethodAbstract = nodeUtils.hasModifier(SyntaxKind.AbstractKeyword, node),
                 method = {
-                    type: AST_NODE_TYPES.FunctionExpression,
+                    type: isMethodAbstract ? AST_NODE_TYPES.TSAbstractFunctionExpression : AST_NODE_TYPES.FunctionExpression,
                     id: null,
                     generator: !!node.asteriskToken,
                     expression: false,
@@ -913,7 +914,7 @@ module.exports = function convert(config) {
                 /**
                  * TypeScript class methods can be defined as "abstract"
                  */
-                const methodDefinitionType = nodeUtils.hasModifier(SyntaxKind.AbstractKeyword, node)
+                const methodDefinitionType = isMethodAbstract
                     ? AST_NODE_TYPES.TSAbstractMethodDefinition
                     : AST_NODE_TYPES.MethodDefinition;
 
diff --git a/tests/lib/__snapshots__/typescript.js.snap b/tests/lib/__snapshots__/typescript.js.snap
index b6ceb70..bb54fd9 100644
--- a/tests/lib/__snapshots__/typescript.js.snap
+++ b/tests/lib/__snapshots__/typescript.js.snap
@@ -1179,7 +1179,7 @@ Object {
                     },
                   },
                 },
-                "type": "FunctionExpression",
+                "type": "TSAbstractFunctionExpression",
               },
             },
           ],