Could someone help me build a test apex for an opportunity closed/won trigger? - salesforce

Question

I'm not a developer and we don't have one currently on our staff. So I looked all over the web and modified this Apex Class to suit my needs so that when an opportunity is marked as closed/won I get a small message in Slack.
It works great and I'd like to send this to Production. However, I didn't realize that I need to include a test for this and I am stuck on what that means.
Here's my Apex Class:
public with sharing class SlackPublisher {
private static final String SLACK_URL = 'https://hooks.slack.com/services/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';
public class Oppty {
#InvocableVariable(label='Opportunity Name')
public String opptyName;
#InvocableVariable(label='Opportunity Owner')
public String opptyOwnerName;
#InvocableVariable(label='Account Name')
public String acctName;
#InvocableVariable(label='Amount')
public String amount;
}
public class UrlMethods {
String BaseUrl; // The Url w/o the page (ex: 'https://na9.salesforce.com/')
String PageUrl; // The Url of the page (ex: '/apex/SomePageName')
String FullUrl; // The full Url of the current page w/query string parameters
// (ex: 'https://na9.salesforce.com/apex/SomePageName?x=1&y=2&z=3')
String Environment; // Writing code that can detect if it is executing in production or a sandbox
// can be extremely useful especially if working with sensitive data.
public UrlMethods() { // Constructor
BaseUrl = URL.getSalesforceBaseUrl().toExternalForm(); // (Example: 'https://na9.salesforce.com/')
}
}
#InvocableMethod(label='Post to Slack')
public static void postToSlack ( List<Oppty> opps ) {
Oppty o = opps[0]; // bulkify the code later
Map<String,Object> msg = new Map<String,Object>();
msg.put('text','Deal ' + o.opptyName + ' was just Closed/Won' + ':champagne:' + '\n' + 'for a total of ' + '$' + o.amount);
msg.put('mrkdwn', true);
String body = JSON.serialize(msg);
System.enqueueJob(new QueueableSlackPost(SLACK_URL, 'POST', body));
}
public class QueueableSlackPost implements System.Queueable, Database.AllowsCallouts {
private final String url;
private final String method;
private final String body;
public QueueableSlackPost(String url, String method, String body) {
this.url = url;
this.method = method;
this.body = body;
}
public void execute(System.QueueableContext ctx) {
HttpRequest req = new HttpRequest();
req.setEndpoint(url);
req.setMethod(method);
req.setBody(body);
Http http = new Http();
HttpResponse res = http.send(req);
}
}
}
and what I found online as a base for a test was this:
#isTest
private class SlackOpportunityPublisherTest {
private class RestMock implements HttpCalloutMock {
public HTTPResponse respond(HTTPRequest req) {
String fullJson = 'your Json Response';
HTTPResponse res = new HTTPResponse();
res.setHeader('Content-Type', 'text/json');
res.setBody(fullJson);
res.setStatusCode(200);
return res;
}
}
static testMethod void service_call() {
Test.setMock(HttpCalloutMock.class, new RestMock());
Test.startTest();
//your webserive call code
Database.GetUpdatedResult r =
Database.getUpdated(
'amount',
Datetime.now().addHours(-1),
Datetime.now());
Test.StopTest();
}
}
When I try to validate this in production it says it only gives me 68% coverage and I need 75%. Can someone help me write the test so that I can put into Prod?