Approval History Clone for Salesforce Account. Allows to show the Approval History for an Object.

AccountApprovalClone.page

<apex:page standardController="Account" extensions="AccountApprovalCloneExtension" >

    <apex:pageBlock title="Approval History Clone">
		<table class="list" border="0" cellspacing="0">
			<tbody>
				<tr class="headerRow">
					<th class="actionColumn" scope="col">Action</th>
					<th scope="col" class=" zen-deemphasize">Date</th>
					<th scope="col" class=" zen-deemphasize">Status</th>
					<!--<th scope="col" class=" zen-deemphasize">Assigned To</th>-->
					<th scope="col" class=" zen-deemphasize">Comments</th>
					<th scope="col" class=" zen-deemphasize">Overall Status</th>
				</tr>
				<apex:repeat value="{!approvalHistoryInformation}" var="processInstance">
					<tr class="tertiaryPalette extraRow dataRow even first">
						
						<td class="actionColumn"></td>
						<td class="actionColumn"></td>
						<td class="actionColumn"></td>
						<td class="actionColumn"></td>
						<td class="actionColumn">
							<div class="extraStatusDiv_P" style="background-color:{!IF(processInstance.Status=='Rejected','#FB8A8C',IF(processInstance.Status=='Pending','#FFD74B',IF(processInstance.Status=='Approved','#A1F78D','')))}; color: black;font-weight: bold;">							
								<img src="{!IF(processInstance.Status=='Rejected','/img/icon/reject12.gif',IF(processInstance.Status=='Pending','/img/icon/pending12.gif',IF(processInstance.Status=='Approved','/img/icon/approve12.gif','')))}" alt="" class="extraStatus" title=""/>
								<span class="extraStatus">{!processInstance.Status}</span>
							</div>
						</td>
						<apex:repeat value="{!processInstance.StepsAndWorkitems}" var="step">
							<tr class="dataRow even first">
								<td class="dataCell">
									<div style="display:{!IF($Profile.Name != 'System Administrator','none','')}">
										<a href="/p/process/ProcessInstanceWorkitemWizardStageManager?id={!step.Id}" style="display: {!IF(step.IsPending == false,'none','')}" class="actionLink">Approve / Reject</a>
									</div>
								</td>
								<td class="dataCell">
									<apex:outputText value="{0, date, MM/d/yyyy hh:mm a}">
                    					<apex:param value="{!step.CreatedDate + offset}" /> 
                					</apex:outputText>
            					</td>
								<td class="dataCell"> {!IF(step.StepStatus=='Started','Submitted',step.StepStatus)} by: <a href="/{!step.ActorId}" target="_blank">{!step.OriginalActor.Name}</a></td>
								<td class="dataCell">{!step.Comments}</td>
								<td class="dataCell"></td>
							</tr>
						</apex:repeat>
					</tr>
				</apex:repeat>
			</tbody>
		</table>
	</apex:pageBlock>
</apex:page>

AccountApprovalCloneExtension.cls

public with sharing class AccountApprovalCloneExtension {
    private final Account accountRecord;

    public AccountApprovalCloneExtension(ApexPages.StandardController stdController) {
        this.accountRecord = (Account) stdController.getRecord();
    }

    public List<ProcessInstance> getApprovalHistoryInformation(){       
        Map<Id,ProcessInstance> mapProcessInstance = new Map<Id,ProcessInstance>([SELECT CompletedDate, CreatedById, CreatedDate,Id,IsDeleted,LastActor.Name,
                                                                                            LastModifiedById,LastModifiedDate,ProcessDefinitionId,Status,SubmittedBy.name,
                                                                                            SystemModstamp,TargetObjectId, 
                                                                                            (SELECT ID, ProcessNodeId, StepStatus,Comments,TargetObjectId,Actor.Name,
                                                                                                CreatedById,IsDeleted,IsPending,OriginalActor.Name,ProcessInstanceId,
                                                                                                RemindersSent,CreatedDate FROM StepsAndWorkitems order by CreatedDate DESC,Id DESC) 
                                                                                            FROM ProcessInstance 
                                                                                            where ProcessInstance.TargetObjectId =: accountRecord.Id order By CreatedDate DESC,Id DESC]);
        

        return mapProcessInstance.values();
    }

    /**a
     * 
     */
    public Double offset{ 
        get {
            TimeZone tz = UserInfo.getTimeZone(); 
            return tz.getOffset(DateTime.now()) / (1000 * 3600 * 24.0); 
        }
    }
}

Final result

Can You Provide the Test Class for the Same