test: cache (#316)

Author: evilebottnawi

test/__snapshots__/cache-option.test.js.snap.webpack4

@@ -192,7 +192,7 @@ exports[`"cache" option should match snapshot for the "true" value and extract c
 
 exports[`"cache" option should match snapshot for the "true" value and extract comments in different files: warnings 2`] = `Array []`;
 
-exports[`"cache" option should match snapshot for the "true" value and extract comments in one files: assets 1`] = `
+exports[`"cache" option should match snapshot for the "true" value and extract comments in the one file: assets 1`] = `
 Object {
   "4.4.js": "/*! For license information please see licenses.txt */
 (window.webpackJsonp=window.webpackJsonp||[]).push([[4],{4:function(n,o){n.exports=Math.random()}}]);",
@@ -245,7 +245,7 @@ Object {
 }
 `;
 
-exports[`"cache" option should match snapshot for the "true" value and extract comments in one files: assets 2`] = `
+exports[`"cache" option should match snapshot for the "true" value and extract comments in the one file: assets 2`] = `
 Object {
   "4.4.js": "/*! For license information please see licenses.txt */
 (window.webpackJsonp=window.webpackJsonp||[]).push([[4],{4:function(n,o){n.exports=Math.random()}}]);",
@@ -298,13 +298,13 @@ Object {
 }
 `;
 
-exports[`"cache" option should match snapshot for the "true" value and extract comments in one files: errors 1`] = `Array []`;
+exports[`"cache" option should match snapshot for the "true" value and extract comments in the one file: errors 1`] = `Array []`;
 
-exports[`"cache" option should match snapshot for the "true" value and extract comments in one files: errors 2`] = `Array []`;
+exports[`"cache" option should match snapshot for the "true" value and extract comments in the one file: errors 2`] = `Array []`;
 
-exports[`"cache" option should match snapshot for the "true" value and extract comments in one files: warnings 1`] = `Array []`;
+exports[`"cache" option should match snapshot for the "true" value and extract comments in the one file: warnings 1`] = `Array []`;
 
-exports[`"cache" option should match snapshot for the "true" value and extract comments in one files: warnings 2`] = `Array []`;
+exports[`"cache" option should match snapshot for the "true" value and extract comments in the one file: warnings 2`] = `Array []`;
 
 exports[`"cache" option should match snapshot for the "true" value and source maps: assets 1`] = `
 Object {