test: fix failing tests for spyOnProperty

Author: phra

flow-typed/npm/jest_v21.x.x.js

@@ -555,7 +555,7 @@ declare var expect: {
 // TODO handle return type
 // http://jasmine.github.io/2.4/introduction.html#section-Spies
 declare function spyOn(value: mixed, method: string): Object;
-declare function spyOnProperty(value: mixed, propertyName: string, accessType: 'get' | 'set'): Object;
+declare function spyOnProperty(value: mixed, propertyName: string, accessType: string): Object;
 
 /** Holds all functions related to manipulating test runner */
 declare var jest: JestObjectType;

packages/jest-mock/src/index.js

@@ -691,10 +691,10 @@ class ModuleMockerClass {
     return object[methodName];
   }
 
-  spyOnProperty(object: any, propertyName: any, accessType = 'get'): any {
-    if (typeof object !== 'object' && typeof object !== 'function') {
+  spyOnProperty(obj: any, propertyName: any, accessType: string = 'get'): any {
+    if (typeof obj !== 'object' && typeof obj !== 'function') {
       throw new Error(
-        'Cannot spyOn on a primitive value; ' + this._typeOf(object) + ' given',
+        'Cannot spyOn on a primitive value; ' + this._typeOf(obj) + ' given',
       );
     }
 
@@ -706,12 +706,7 @@ class ModuleMockerClass {
       throw new Error('No property name supplied');
     }
 
-    let descriptor;
-    try {
-      descriptor = Object.getOwnPropertyDescriptor(obj, propertyName);
-    } catch (e) {
-      // IE 8 doesn't support `definePropery` on non-DOM nodes
-    }
+    const descriptor = Object.getOwnPropertyDescriptor(obj, propertyName);
 
     if (!descriptor) {
       throw new Error(propertyName + ' property does not exist');
@@ -731,7 +726,7 @@ class ModuleMockerClass {
       if (typeof original !== 'function') {
         throw new Error(
           'Cannot spy the ' +
-            methodName +
+            propertyName +
             ' property because it is not a function; ' +
             this._typeOf(original) +
             ' given instead',