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Added some integration tests to contrast with mock tests
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‎fflib-sample-code/src/classes/OpportunitiesServiceTestIntegration.cls

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/**
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* Copyright (c) 2012, FinancialForce.com, inc
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the FinancialForce.com, inc nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**/
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@IsTest
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private class OpportunitiesServiceTestIntegration
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{
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@IsTest
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private static void testServiceClass()
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{
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// Create Opportunity, Lines, Pricebooks and Products
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List<Opportunity> opps = new List<Opportunity>();
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List<List<Product2>> productsByOpp = new List<List<Product2>>();
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List<List<PricebookEntry>> pricebookEntriesByOpp = new List<List<PricebookEntry>>();
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List<List<OpportunityLineItem>> oppLinesByOpp = new List<List<OpportunityLineItem>>();
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Opportunity opp = new Opportunity();
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opp.Name = 'Test';
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opp.StageName = 'Open';
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opp.CloseDate = System.today();
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opps.add(opp);
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List<Product2> products = new List<Product2>();
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List<PricebookEntry> pricebookEntries = new List<PricebookEntry>();
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List<OpportunityLineItem> oppLineItems = new List<OpportunityLineItem>();
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for(Integer i=0; i<10; i++) {
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Product2 product = new Product2();
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product.Name = opp.Name + ' : Product : ' + i;
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products.add(product);
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PricebookEntry pbe = new PricebookEntry();
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pbe.UnitPrice = 10;
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pbe.IsActive = true;
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pbe.UseStandardPrice = false;
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pbe.Pricebook2Id = Test.getStandardPricebookId();
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pricebookEntries.add(pbe);
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OpportunityLineItem oppLineItem = new OpportunityLineItem();
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oppLineItem.Quantity = 1;
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oppLineItem.TotalPrice = 10;
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oppLineItems.add(oppLineItem);
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}
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productsByOpp.add(products);
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pricebookEntriesByOpp.add(pricebookEntries);
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oppLinesByOpp.add(oppLineItems);
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// Insert Opportunities
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insert opps;
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// Insert Products
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List<Product2> allProducts = new List<Product2>();
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for(List<Product2> oppProducts : productsByOpp)
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allProducts.addAll(oppProducts);
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insert allProducts;
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// Insert Pricebooks
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Integer oppIdx = 0;
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List<PricebookEntry> allPricebookEntries = new List<PricebookEntry>();
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for(List<PricebookEntry> oppPricebookEntries : pricebookEntriesByOpp) {
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List<Product2> pbproducts = productsByOpp[oppIdx++];
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Integer lineIdx = 0;
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for(PricebookEntry pricebookEntry : oppPricebookEntries)
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pricebookEntry.Product2Id = pbproducts[lineIdx++].Id;
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allPricebookEntries.addAll(oppPricebookEntries);
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}
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insert allPricebookEntries;
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// Insert Opportunity Lines
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oppIdx = 0;
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List<OpportunityLineItem> allOppLineItems = new List<OpportunityLineItem>();
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for(List<OpportunityLineItem> oppLines : oppLinesByOpp) {
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List<PricebookEntry> oppPricebookEntries = pricebookEntriesByOpp[oppIdx];
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Integer lineIdx = 0;
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for(OpportunityLineItem oppLine : oppLines) {
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oppLine.OpportunityId = opps[oppIdx].Id;
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oppLine.PricebookEntryId = oppPricebookEntries[lineIdx++].Id;
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}
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allOppLineItems.addAll(oppLines);
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oppIdx++;
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}
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insert allOppLineItems;
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// Test
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Test.startTest();
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OpportunitiesService.applyDiscounts(new Set<Id> { opp.Id }, 10);
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Test.stopTest();
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// Assert
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System.assertEquals(90, [select Amount from Opportunity limit 1][0].Amount);
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}
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}

‎fflib-sample-code/src/classes/OpportunitiesServiceTestIntegration.cls-meta.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<ApexClass xmlns="http://soap.sforce.com/2006/04/metadata">
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<apiVersion>31.0</apiVersion>
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</ApexClass>

‎fflib-sample-code/src/classes/OpportunityApplyDiscountControllerTestI.cls

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/**
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* Copyright (c) 2012, FinancialForce.com, inc
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the FinancialForce.com, inc nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**/
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@IsTest
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private class OpportunityApplyDiscountControllerTestI
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{
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@IsTest
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private static void testControllerClass()
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{
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// Create Opportunity, Lines, Pricebooks and Products
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List<Opportunity> opps = new List<Opportunity>();
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List<List<Product2>> productsByOpp = new List<List<Product2>>();
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List<List<PricebookEntry>> pricebookEntriesByOpp = new List<List<PricebookEntry>>();
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List<List<OpportunityLineItem>> oppLinesByOpp = new List<List<OpportunityLineItem>>();
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Opportunity opp = new Opportunity();
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opp.Name = 'Test';
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opp.StageName = 'Open';
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opp.CloseDate = System.today();
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opps.add(opp);
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List<Product2> products = new List<Product2>();
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List<PricebookEntry> pricebookEntries = new List<PricebookEntry>();
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List<OpportunityLineItem> oppLineItems = new List<OpportunityLineItem>();
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for(Integer i=0; i<10; i++) {
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Product2 product = new Product2();
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product.Name = opp.Name + ' : Product : ' + i;
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products.add(product);
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PricebookEntry pbe = new PricebookEntry();
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pbe.UnitPrice = 10;
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pbe.IsActive = true;
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pbe.UseStandardPrice = false;
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pbe.Pricebook2Id = Test.getStandardPricebookId();
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pricebookEntries.add(pbe);
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OpportunityLineItem oppLineItem = new OpportunityLineItem();
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oppLineItem.Quantity = 1;
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oppLineItem.TotalPrice = 10;
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oppLineItems.add(oppLineItem);
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}
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productsByOpp.add(products);
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pricebookEntriesByOpp.add(pricebookEntries);
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oppLinesByOpp.add(oppLineItems);
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// Insert Opportunities
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insert opps;
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// Insert Products
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List<Product2> allProducts = new List<Product2>();
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for(List<Product2> oppProducts : productsByOpp)
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allProducts.addAll(oppProducts);
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insert allProducts;
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// Insert Pricebooks
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Integer oppIdx = 0;
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List<PricebookEntry> allPricebookEntries = new List<PricebookEntry>();
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for(List<PricebookEntry> oppPricebookEntries : pricebookEntriesByOpp) {
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List<Product2> pbproducts = productsByOpp[oppIdx++];
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Integer lineIdx = 0;
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for(PricebookEntry pricebookEntry : oppPricebookEntries)
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pricebookEntry.Product2Id = pbproducts[lineIdx++].Id;
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allPricebookEntries.addAll(oppPricebookEntries);
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}
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insert allPricebookEntries;
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// Insert Opportunity Lines
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oppIdx = 0;
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List<OpportunityLineItem> allOppLineItems = new List<OpportunityLineItem>();
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for(List<OpportunityLineItem> oppLines : oppLinesByOpp) {
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List<PricebookEntry> oppPricebookEntries = pricebookEntriesByOpp[oppIdx];
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Integer lineIdx = 0;
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for(OpportunityLineItem oppLine : oppLines) {
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oppLine.OpportunityId = opps[oppIdx].Id;
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oppLine.PricebookEntryId = oppPricebookEntries[lineIdx++].Id;
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}
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allOppLineItems.addAll(oppLines);
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oppIdx++;
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}
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insert allOppLineItems;
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// Test
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Test.startTest();
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ApexPages.StandardController standardController = new ApexPages.StandardController([select Id from Opportunity limit 1]);
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OpportunityApplyDiscountController controller = new OpportunityApplyDiscountController(standardController);
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controller.DiscountPercentage = 10;
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controller.applyDiscount();
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Test.stopTest();
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// Assert
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System.assertEquals(90, [select Amount from Opportunity where Id = :standardController.getId()].Amount);
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}
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}

‎fflib-sample-code/src/classes/OpportunityApplyDiscountControllerTestI.cls-meta.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<ApexClass xmlns="http://soap.sforce.com/2006/04/metadata">
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<apiVersion>31.0</apiVersion>
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</ApexClass>

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