Write tests for the followingYour tests must be written using JUnit $5.$

$-$ Product Class

$$ Constructing a Product with a non$-$negative price

$$ Getting and setting non$-$negative prices

$$ Getting and setting sku

$$ Getting and setting description

$$ Constructing a Product with a negative price

$$ Getting and setting negative prices

$$ equals$()$

$$ toString$()$

public class Product $\{$

private String sku;

private double unitPrice;

private String description;

$/**$

$*$ Represents a Product with a SKU number, unit price, and description.

$*$

$*$ @param sku

$*$ @param unitPrice must be non$-$negative

$*$ @param description

$*/$

public Product$($String sku, double unitPrice, String description$)\{$

if $($unitPrice $<0)\{$

throw new IllegalArgumentException$("$Unit price must be non$-$negative."$)$;

$\}$

this.sku $=$ sku;

this.unitPrice $=$ unitPrice;

this.description $=$ description;

$\}$

$/**$

$*$ Returns the unit price

$*$ @return unit price

$*/$

public double getUnitPrice$()\{$

return unitPrice;

$\}$

$/**$

$*$ Sets the unit price

$*$ @param unitPrice must be non$-$negative

$*/$

public void setUnitPrice$($double unitPrice$)\{$

if $($unitPrice $<0)\{$

throw new IllegalArgumentException$("$Unit price must be non$-$negative."$)$;

$\}$

this.unitPrice $=$ unitPrice;

$\}$

$/**$

$*$ Returns the description

$*$ @return the description

$*/$

public String getDescription$()\{$

return description;

$\}$

$/**$

$*$ Sets the description

$*$ @param description

$*/$

public void setDescription$($String description$)\{$

this.description $=$ description;

$\}$

$/**$

$*$ Returns the SKU number

$*$ @return the SKU number

$*/$

public String getSku$()\{$

return sku;

$\}$

@Override

public String toString$()\{$

return "Product $[$sku$="+$ sku $+",$ unitPrice$="+$ unitPrice $+",$ description$="+$ description $+"]"$;

$\}$

$/**$

$*$ Products are equal $*$only$*$ if their sku numbers are equal

$*$ @see java.lang.Object#equals$($java$.$lang.Object$)$

$*/$

@Override

public boolean equals$($Object obj$)\{$

if $($this $==$ obj$)$

return true;

if $($obj $==$ null$)$

return false;

if $($getClass$()!=$ obj.getClass$())$

return false;

Product other $=($Product$)$ obj;

if $($sku $==$ null$)\{$

if $($other$.$sku $!=$ null$)$

return false;

$\}$ else if $(!$sku.equals$($other$.$sku$))$

return false;

return true;

$\}$

$\}$