added an error if implementation of sorting function was not found in memory (#18)

Author: ALegchilov

CHANGELOG.MD

@@ -4,6 +4,9 @@ All notable changes to the "@qavajs/steps-memory" will be documented in this fil
 
 Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
 
+## [0.13.0]
+- added an error if implementation of sorting function was not found in memory
+
 ## [0.12.0]
 - added validation step with parameter in form of data table array
 

package-lock.json

@@ -24,7 +24,7 @@
     "@cucumber/cucumber": "^9.1.2",
     "@qavajs/cli": "^0.0.24",
     "@qavajs/console-formatter": "^0.2.1",
-    "@qavajs/memory": "^1.4.1",
+    "@qavajs/memory": "^1.5.1",
     "@qavajs/xunit-formatter": "^0.0.4",
     "@types/chai": "^4.3.5",
     "ts-node": "^10.9.1",

package.json

@@ -72,6 +72,8 @@ Then(
  * Verify that array is sorted by
  * @param {string} arr - memory key of array
  * @param {string} comparator - memory key of sort comparator function https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort#description
+ * Important: This module does not include implementation of sorting function,
+ * as it may have various implementations for different types of compared data
  * @example I expect '$arr' array to be sorted by '$ascending'
  */
 Then(
@@ -80,6 +82,7 @@ Then(
         const array: Array<any> = await getValue(arr);
         if (!Array.isArray(array)) throw new Error(`'${arr}' is not an array`);
         const comparatorFn: (a: any, b: any) => number = await getValue(comparator);
+        if (typeof comparatorFn !== 'function') throw new Error(`'${comparator}' is not implemented`);
         const arrayCopy: Array<any> = [...array];
         arrayCopy.sort(comparatorFn);
         const validation: Function = getValidation('to deeply equal');

src/validation.ts

@@ -5,7 +5,7 @@ Feature: Memory
     Then I expect '$result' to be equal '33'
 
   Scenario: save result of sync computed to memory
-    When I save "$getString()" to memory as 'string1'
+    When I save "$getComputedString()" to memory as 'string1'
     Then I expect '$string1' to be equal 'I was computed'
 
   Scenario: save result of async computed to memory

test-e2e/features/memory.feature

@@ -2,12 +2,12 @@ export default class Memory {
 
     arr = [1, 2, 3, 4, 5];
     reverseArr = [5, 4, 3, 2, 1];
-    getString = function (): string {
+    getComputedString = function (): string {
         return 'I was computed';
     };
 
     getStringAsync = function (): Promise<string> {
-        return new Promise((resolve, reject) => {
+        return new Promise((resolve) => {
             setTimeout(() => {
                 resolve('I was computed async');
             }, 50);