fix(flow): Handle array shorthand notation

Author: danez

src/utils/__tests__/getFlowType-test.js

@@ -68,6 +68,11 @@ describe('getFlowType', () => {
     expect(getFlowType(typePath)).toEqual({ name: 'xyz', nullable: true });
   });
 
+  it('detects array type shorthand', () => {
+    var typePath = expression('x: number[]').get('typeAnnotation').get('typeAnnotation');
+    expect(getFlowType(typePath)).toEqual({ name: 'Array', elements: [{ name: 'number' }], raw: 'number[]' });
+  });
+
   it('detects array type', () => {
     var typePath = expression('x: Array<number>').get('typeAnnotation').get('typeAnnotation');
     expect(getFlowType(typePath)).toEqual({ name: 'Array', elements: [{ name: 'number' }], raw: 'Array<number>' });

src/utils/getFlowType.js

@@ -37,6 +37,7 @@ const flowLiteralTypes = {
 };
 
 const namedTypes = {
+  ArrayTypeAnnotation: handleArrayTypeAnnotation,
   GenericTypeAnnotation: handleGenericTypeAnnotation,
   ObjectTypeAnnotation: handleObjectTypeAnnotation,
   UnionTypeAnnotation: handleUnionTypeAnnotation,
@@ -76,6 +77,14 @@ function handleKeysHelper(path: NodePath) {
   }
 }
 
+function handleArrayTypeAnnotation(path: NodePath) {
+  return {
+    name: 'Array',
+    elements: [getFlowType(path.get('elementType'))],
+    raw: printValue(path),
+  };
+}
+
 function handleGenericTypeAnnotation(path: NodePath) {
   if (path.node.id.name === '$Keys' && path.node.typeParameters) {
     return handleKeysHelper(path);