Something

.idea/workspace.xml

 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="3455511b-a100-4bbd-b07c-68f009bc8dbc" name="Default" comment="">
-      <change beforePath="$PROJECT_DIR$/arraz/src/main/java/Arraz.java" beforeDir="false" afterPath="$PROJECT_DIR$/arraz/src/main/java/Arraz.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/arraz/src/test/java/ArrazTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/arraz/src/test/java/ArrazTest.java" afterDir="false" />
     </list>
     <ignored path="$PROJECT_DIR$/arraz/target/" />
     <session id="-1803996711">
       <usages-collector id="statistics.lifecycle.project">
         <counts>
-          <entry key="project.closed" value="5" />
+          <entry key="project.closed" value="7" />
           <entry key="project.open.time.14" value="2" />
-          <entry key="project.open.time.2" value="1" />
+          <entry key="project.open.time.2" value="2" />
+          <entry key="project.open.time.3" value="1" />
           <entry key="project.open.time.4" value="2" />
-          <entry key="project.opened" value="5" />
+          <entry key="project.opened" value="7" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.edit">
         <counts>
-          <entry key="JAVA" value="9947" />
+          <entry key="JAVA" value="9964" />
           <entry key="XML" value="4" />
         </counts>
       </usages-collector>
       <file pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/arraz/src/main/java/Arraz.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="1335">
-              <caret line="89" column="9" lean-forward="true" selection-start-line="89" selection-start-column="9" selection-end-line="89" selection-end-column="9" />
+            <state relative-caret-position="330">
+              <caret line="341" column="18" lean-forward="true" selection-start-line="341" selection-start-column="18" selection-end-line="341" selection-end-column="18" />
               <folding>
                 <element signature="imports" expanded="true" />
-                <element signature="e#504#505#0" expanded="true" />
-                <element signature="e#561#562#0" expanded="true" />
-                <element signature="e#616#617#0" expanded="true" />
-                <element signature="e#674#675#0" expanded="true" />
-                <element signature="e#4880#4881#0" expanded="true" />
-                <element signature="e#4918#4919#0" expanded="true" />
               </folding>
             </state>
           </provider>
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/arraz/src/test/java/ArrazTest.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="3090">
-              <caret line="206" column="37" lean-forward="true" selection-start-line="206" selection-start-column="37" selection-end-line="206" selection-end-column="37" />
+            <state relative-caret-position="4770">
+              <caret line="322" column="48" selection-start-line="322" selection-start-column="48" selection-end-line="322" selection-end-column="48" />
               <folding>
                 <element signature="imports" expanded="true" />
-                <element signature="e#8537#8546#0" expanded="true" />
-                <element signature="e#8823#8832#0" expanded="true" />
               </folding>
             </state>
           </provider>
       <find>remove</find>
       <find>findindex</find>
       <find>copy</find>
+      <find>sort</find>
     </findStrings>
     <replaceStrings>
       <replace>public</replace>
       </MavenImportingSettings>
     </option>
   </component>
-  <component name="ProjectFrameBounds">
+  <component name="ProjectFrameBounds" extendedState="6">
     <option name="y" value="22" />
     <option name="width" value="1280" />
     <option name="height" value="739" />
     <property name="GO_FMT" value="false" />
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="aspect.path.notification.shown" value="true" />
-    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1544145500059" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1544197039678" />
     <property name="com.intellij.testIntegration.createTest.CreateTestDialog.defaultLibrary" value="JUnit4" />
     <property name="jdk.selected.JAVA_MODULE" value="1.8" />
     <property name="last_opened_file_path" value="$PROJECT_DIR$" />
       </list>
     </option>
   </component>
-  <component name="RunManager" selected="JUnit.ArrazTest">
+  <component name="RunManager" selected="JUnit.ArrazTest.testSort2">
     <configuration default="true" type="Applet" factoryName="Applet">
       <option name="POLICY_FILE" value="$APPLICATION_HOME_DIR$/bin/appletviewer.policy" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="ArrazTest.testRemoveElementFromArray3" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="ArrazTest.testSort2" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="arraz" />
       <option name="PACKAGE_NAME" value="" />
       <option name="MAIN_CLASS_NAME" value="ArrazTest" />
-      <option name="METHOD_NAME" value="testRemoveElementFromArray3" />
+      <option name="METHOD_NAME" value="testSort2" />
       <option name="TEST_OBJECT" value="method" />
       <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
       <method v="2">
       </method>
     </configuration>
     <list>
-      <item itemvalue="JUnit.ArrazTest.testRemoveElementFromArray3" />
       <item itemvalue="JUnit.ArrazTest.testFindIndexOf2" />
       <item itemvalue="JUnit.ArrazTest.testCopyArrayByInterator1" />
       <item itemvalue="JUnit.ArrazTest.testCopyArrayByInterator2" />
       <item itemvalue="JUnit.ArrazTest" />
+      <item itemvalue="JUnit.ArrazTest.testSort2" />
     </list>
     <recent_temporary>
       <list>
+        <item itemvalue="JUnit.ArrazTest.testSort2" />
         <item itemvalue="JUnit.ArrazTest" />
         <item itemvalue="JUnit.ArrazTest.testCopyArrayByInterator2" />
         <item itemvalue="JUnit.ArrazTest.testCopyArrayByInterator1" />
         <item itemvalue="JUnit.ArrazTest.testFindIndexOf2" />
-        <item itemvalue="JUnit.ArrazTest.testRemoveElementFromArray3" />
       </list>
     </recent_temporary>
   </component>
       <workItem from="1544048104554" duration="1398000" />
       <workItem from="1544060926907" duration="4177000" />
       <workItem from="1544125434968" duration="11066000" />
+      <workItem from="1544196949279" duration="205000" />
+      <workItem from="1544206032237" duration="356000" />
     </task>
     <task id="LOCAL-00001" summary="readme and docs">
       <created>1544021313039</created>
     <servers />
   </component>
   <component name="TestHistory">
-    <history-entry file="ArrazTest - 2018.12.06 at 19h 59m 51s.xml">
-      <configuration name="ArrazTest" configurationId="JUnit" />
-    </history-entry>
-    <history-entry file="ArrazTest - 2018.12.06 at 20h 00m 03s.xml">
-      <configuration name="ArrazTest" configurationId="JUnit" />
-    </history-entry>
     <history-entry file="ArrazTest_testCheck2ArraysForEqual3 - 2018.12.06 at 20h 01m 22s.xml">
       <configuration name="ArrazTest.testCheck2ArraysForEqual3" configurationId="JUnit" />
     </history-entry>
     <history-entry file="ArrazTest - 2018.12.06 at 20h 18m 25s.xml">
       <configuration name="ArrazTest" configurationId="JUnit" />
     </history-entry>
+    <history-entry file="ArrazTest_testSort2 - 2018.12.07 at 10h 36m 38s.xml">
+      <configuration name="ArrazTest.testSort2" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="ArrazTest_testSort2 - 2018.12.07 at 10h 37m 24s.xml">
+      <configuration name="ArrazTest.testSort2" configurationId="JUnit" />
+    </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="22214000" />
+    <option name="totallyTimeSpent" value="22775000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="22" width="1280" height="739" extended-state="0" />
       <window_info anchor="bottom" id="Version Control" order="9" />
       <window_info anchor="bottom" id="Database Changes" order="10" show_stripe_button="false" />
       <window_info anchor="bottom" id="Messages" order="11" weight="0.32921174" />
-      <window_info anchor="right" id="Coverage" side_tool="true" weight="0.32956383" />
       <window_info anchor="right" id="Commander" order="0" weight="0.4" />
       <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
       <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" weight="0.25" />
       <window_info anchor="right" id="Database" order="6" />
       <window_info anchor="right" id="Palette&#9;" order="7" />
       <window_info anchor="right" id="Maven Projects" order="8" />
+      <window_info anchor="right" id="Coverage" order="9" side_tool="true" weight="0.32956383" />
     </layout>
   </component>
   <component name="TypeScriptGeneratedFilesManager">
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/arraz/src/test/java/ArrazTest.java">
+    <entry file="file://$PROJECT_DIR$/arraz/src/main/java/Arraz.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="3090">
-          <caret line="206" column="37" lean-forward="true" selection-start-line="206" selection-start-column="37" selection-end-line="206" selection-end-column="37" />
+        <state relative-caret-position="330">
+          <caret line="341" column="18" lean-forward="true" selection-start-line="341" selection-start-column="18" selection-end-line="341" selection-end-column="18" />
           <folding>
             <element signature="imports" expanded="true" />
-            <element signature="e#8537#8546#0" expanded="true" />
-            <element signature="e#8823#8832#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/arraz/src/main/java/Arraz.java">
+    <entry file="file://$PROJECT_DIR$/arraz/src/test/java/ArrazTest.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="1335">
-          <caret line="89" column="9" lean-forward="true" selection-start-line="89" selection-start-column="9" selection-end-line="89" selection-end-column="9" />
+        <state relative-caret-position="4770">
+          <caret line="322" column="48" selection-start-line="322" selection-start-column="48" selection-end-line="322" selection-end-column="48" />
           <folding>
             <element signature="imports" expanded="true" />
-            <element signature="e#504#505#0" expanded="true" />
-            <element signature="e#561#562#0" expanded="true" />
-            <element signature="e#616#617#0" expanded="true" />
-            <element signature="e#674#675#0" expanded="true" />
-            <element signature="e#4880#4881#0" expanded="true" />
-            <element signature="e#4918#4919#0" expanded="true" />
           </folding>
         </state>
       </provider>

arraz/src/test/java/ArrazTest.java

 
     @Test
     public void testSort2(){
-        int[] arr = new int[] {1,9,3,4,6,5,7,8,2};
+        int[] arr = new int[] {9,8,7,6,5,4,3,2,1};
 
         int[] expected  = new int[] {1,2,3,4,5,6,7,8,9};
         int[] actual = arraz.sort(arr);