use name if value not present

Author: danez

src/__tests__/__snapshots__/main-test.ts.snap

@@ -1811,7 +1811,7 @@ Object {
       "description": "String value of a number",
       "required": false,
       "tsType": Object {
-        "name": "STRING_VALS[undefined]",
+        "name": "STRING_VALS[number]",
         "raw": "typeof STRING_VALS[number]",
       },
     },

src/utils/__tests__/getTSType-test.ts

@@ -753,6 +753,26 @@ describe('getTSType', () => {
     });
   });
 
+  it('resolves indexed access of array', () => {
+    const typePath = statement(`
+      var x: typeof STRING_VALS[number];
+
+      const STRING_VALS = [
+        'one',
+        'two',
+        'three'
+      ];
+    `)
+      .get('declarations', 0)
+      .get('id')
+      .get('typeAnnotation')
+      .get('typeAnnotation');
+    expect(getTSType(typePath, null, noopImporter)).toEqual({
+      name: 'STRING_VALS[number]',
+      raw: 'typeof STRING_VALS[number]',
+    });
+  });
+
   it('can resolve indexed access to imported type', () => {
     const typePath = statement(`
       var x: A["x"] = 2;

src/utils/getTSType.ts

@@ -391,8 +391,7 @@ function handleTSIndexedAccessType(
   // We only get the signature if the objectType is a type (vs interface)
   if (!objectType.signature)
     return {
-      name: `${objectType.name}[${indexType.value &&
-        indexType.value.toString()}]`,
+      name: `${objectType.name}[${indexType.value ? indexType.value.toString(): indexType.name }]`,
       raw: printValue(path),
     };
   const resolvedType = objectType.signature.properties.find(p => {