need to fix one method

Checkbook/.idea/compiler.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="Checkbook" />
+      </profile>
+    </annotationProcessing>
+    <bytecodeTargetLevel>
+      <module name="Checkbook" target="1.8" />
+    </bytecodeTargetLevel>
+  </component>
+</project>

Checkbook/.idea/libraries/Maven__junit_junit_4_0.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: junit:junit:4.0">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/junit/junit/4.0/junit-4.0.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/junit/junit/4.0/junit-4.0-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/junit/junit/4.0/junit-4.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

Checkbook/.idea/misc.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/classes" />
+  </component>
+</project>

Checkbook/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/Checkbook.iml" filepath="$PROJECT_DIR$/Checkbook.iml" />
+    </modules>
+  </component>
+</project>

Checkbook/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

Checkbook/.idea/workspace.xml

@@ -0,0 +1,563 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ChangeListManager">
+    <list default="true" id="6740fffe-7f4d-4976-ad48-af24e6914f17" name="Default Changelist" comment="">
+      <change afterPath="$PROJECT_DIR$/.idea/libraries/Maven__junit_junit_4_0.xml" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/.idea/modules.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/Checkbook.iml" beforeDir="false" afterPath="$PROJECT_DIR$/Checkbook.iml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/Checkbook.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Checkbook.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/GenericAccount.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/GenericAccount.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/Payee.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Payee.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/Transaction.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Transaction.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/test/java/CheckbookTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/CheckbookTest.java" afterDir="false" />
+    </list>
+    <ignored path="$PROJECT_DIR$/target/" />
+    <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
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+          <entry key="project.opened" value="3" />
+        </counts>
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+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.types.open">
+        <counts>
+          <entry key="JAVA" value="10" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.extensions.edit">
+        <counts>
+          <entry key="java" value="3480" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.types.edit">
+        <counts>
+          <entry key="JAVA" value="3480" />
+        </counts>
+      </usages-collector>
+    </session>
+  </component>
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+    <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/src/main/java/Checkbook.java">
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+      <file pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/src/test/java/CheckbookTest.java">
+          <provider selected="true" editor-type-id="text-editor">
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+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/src/main/java/Payee.java">
+          <provider selected="true" editor-type-id="text-editor">
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+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/src/main/java/GenericAccount.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="15">
+              <caret line="1" column="29" selection-start-line="1" selection-start-column="29" selection-end-line="1" selection-end-column="29" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/src/main/java/Transaction.java">
+          <provider selected="true" editor-type-id="text-editor">
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+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/.." />
+  </component>
+  <component name="IdeDocumentHistory">
+    <option name="CHANGED_PATHS">
+      <list>
+        <option value="$PROJECT_DIR$/src/main/java/GenericAccount.java" />
+        <option value="$PROJECT_DIR$/src/main/java/Transaction.java" />
+        <option value="$PROJECT_DIR$/src/main/java/Payee.java" />
+        <option value="$PROJECT_DIR$/src/main/java/Checkbook.java" />
+        <option value="$PROJECT_DIR$/src/test/java/CheckbookTest.java" />
+      </list>
+    </option>
+  </component>
+  <component name="JsBuildToolGruntFileManager" detection-done="true" sorting="DEFINITION_ORDER" />
+  <component name="JsBuildToolPackageJson" detection-done="true" sorting="DEFINITION_ORDER" />
+  <component name="JsGulpfileManager">
+    <detection-done>true</detection-done>
+    <sorting>DEFINITION_ORDER</sorting>
+  </component>
+  <component name="ProjectFrameBounds">
+    <option name="y" value="23" />
+    <option name="width" value="1280" />
+    <option name="height" value="709" />
+  </component>
+  <component name="ProjectLevelVcsManager" settingsEditedManually="true" />
+  <component name="ProjectView">
+    <navigator proportions="" version="1">
+      <foldersAlwaysOnTop value="true" />
+    </navigator>
+    <panes>
+      <pane id="PackagesPane" />
+      <pane id="Scope" />
+      <pane id="ProjectPane">
+        <subPane>
+          <expand>
+            <path>
+              <item name="Checkbook" type="b2602c69:ProjectViewProjectNode" />
+              <item name="Checkbook" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="Checkbook" type="b2602c69:ProjectViewProjectNode" />
+              <item name="Checkbook" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="Checkbook" type="b2602c69:ProjectViewProjectNode" />
+              <item name="Checkbook" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="Checkbook" type="b2602c69:ProjectViewProjectNode" />
+              <item name="Checkbook" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="Checkbook" type="b2602c69:ProjectViewProjectNode" />
+              <item name="Checkbook" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="test" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="Checkbook" type="b2602c69:ProjectViewProjectNode" />
+              <item name="Checkbook" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="test" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+            </path>
+          </expand>
+          <select />
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+  <component name="PropertiesComponent">
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+    <property name="aspect.path.notification.shown" value="true" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1544369669468" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$/pom.xml" />
+    <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
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+        </RuleState>
+      </list>
+    </option>
+  </component>
+  <component name="RunManager" selected="JUnit.CheckbookTest">
+    <configuration name="CheckbookTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="Checkbook" />
+      <option name="PACKAGE_NAME" value="" />
+      <option name="MAIN_CLASS_NAME" value="CheckbookTest" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="CheckbookTest.test1GetTransactionsForDate" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="Checkbook" />
+      <option name="PACKAGE_NAME" value="" />
+      <option name="MAIN_CLASS_NAME" value="CheckbookTest" />
+      <option name="METHOD_NAME" value="test1GetTransactionsForDate" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="CheckbookTest.test2GetTransactionsForDate" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="Checkbook" />
+      <option name="PACKAGE_NAME" value="" />
+      <option name="MAIN_CLASS_NAME" value="CheckbookTest" />
+      <option name="METHOD_NAME" value="test2GetTransactionsForDate" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="CheckbookTest.test3GetAllCreditTransactions" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="Checkbook" />
+      <option name="PACKAGE_NAME" value="" />
+      <option name="MAIN_CLASS_NAME" value="CheckbookTest" />
+      <option name="METHOD_NAME" value="test3GetAllCreditTransactions" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="CheckbookTest.test3GetAllDebitTransactions" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="Checkbook" />
+      <option name="PACKAGE_NAME" value="" />
+      <option name="MAIN_CLASS_NAME" value="CheckbookTest" />
+      <option name="METHOD_NAME" value="test3GetAllDebitTransactions" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <list>
+      <item itemvalue="JUnit.CheckbookTest.test3GetAllCreditTransactions" />
+      <item itemvalue="JUnit.CheckbookTest.test3GetAllDebitTransactions" />
+      <item itemvalue="JUnit.CheckbookTest.test1GetTransactionsForDate" />
+      <item itemvalue="JUnit.CheckbookTest.test2GetTransactionsForDate" />
+      <item itemvalue="JUnit.CheckbookTest" />
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+        <item itemvalue="JUnit.CheckbookTest" />
+        <item itemvalue="JUnit.CheckbookTest.test1GetTransactionsForDate" />
+        <item itemvalue="JUnit.CheckbookTest.test2GetTransactionsForDate" />
+        <item itemvalue="JUnit.CheckbookTest.test3GetAllDebitTransactions" />
+        <item itemvalue="JUnit.CheckbookTest.test3GetAllCreditTransactions" />
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+    <history-entry file="CheckbookTest - 2018.12.09 at 10h 20m 27s.xml">
+      <configuration name="CheckbookTest" configurationId="JUnit" />
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+    <history-entry file="CheckbookTest - 2018.12.09 at 10h 21m 17s.xml">
+      <configuration name="CheckbookTest" configurationId="JUnit" />
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+    <history-entry file="CheckbookTest - 2018.12.09 at 10h 22m 07s.xml">
+      <configuration name="CheckbookTest" configurationId="JUnit" />
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+    <history-entry file="CheckbookTest - 2018.12.09 at 10h 24m 03s.xml">
+      <configuration name="CheckbookTest" configurationId="JUnit" />
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+    <history-entry file="CheckbookTest - 2018.12.09 at 10h 24m 20s.xml">
+      <configuration name="CheckbookTest" configurationId="JUnit" />
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+      <configuration name="CheckbookTest" configurationId="JUnit" />
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+      <window_info anchor="bottom" id="Terminal" order="1" />
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+      <window_info anchor="bottom" id="Message" order="3" />
+      <window_info anchor="bottom" id="Find" order="4" />
+      <window_info anchor="bottom" id="Run" order="5" />
+      <window_info anchor="bottom" id="Database Changes" order="6" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Debug" order="7" weight="0.4" />
+      <window_info anchor="bottom" id="Cvs" order="8" weight="0.25" />
+      <window_info anchor="bottom" id="Inspection" order="9" weight="0.4" />
+      <window_info anchor="bottom" id="TODO" order="10" />
+      <window_info anchor="right" id="Capture Analysis" order="0" />
+      <window_info anchor="right" id="Theme Preview" order="1" />
+      <window_info anchor="right" id="Palette&#9;" order="2" />
+      <window_info anchor="right" id="Database" order="3" />
+      <window_info anchor="right" id="Maven Projects" order="4" weight="0.3296875" />
+      <window_info anchor="right" id="Palette" order="5" />
+      <window_info anchor="right" id="Commander" internal_type="SLIDING" order="6" type="SLIDING" weight="0.4" />
+      <window_info anchor="right" id="Ant Build" order="7" weight="0.25" />
+      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="8" weight="0.25" />
+    </layout-to-restore>
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="1" />
+  </component>
+  <component name="VcsContentAnnotationSettings">
+    <option name="myLimit" value="2678400000" />
+  </component>
+  <component name="editorHistoryManager">
+    <entry file="file://$PROJECT_DIR$/src/main/java/AccountBook.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="45">
+          <caret line="3" column="27" selection-start-line="3" selection-start-column="27" selection-end-line="3" selection-end-column="27" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/TransactionType.java">
+      <provider selected="true" editor-type-id="text-editor" />
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/Transaction.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="60">
+          <caret line="6" column="31" selection-start-line="6" selection-start-column="31" selection-end-line="6" selection-end-column="31" />
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+            <element signature="e#1919#1920#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/Payee.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="345">
+          <caret line="35" column="37" selection-start-line="35" selection-start-column="37" selection-end-line="35" selection-end-column="37" />
+          <folding>
+            <element signature="e#1143#1144#0" expanded="true" />
+            <element signature="e#1215#1216#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/GenericAccount.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="15">
+          <caret line="1" column="29" selection-start-line="1" selection-start-column="29" selection-end-line="1" selection-end-column="29" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/Checkbook.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="231">
+          <caret line="119" column="53" selection-start-line="119" selection-start-column="53" selection-end-line="119" selection-end-column="53" />
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+            <element signature="imports" expanded="true" />
+            <element signature="e#841#842#0" expanded="true" />
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+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/CheckbookTest.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="231">
+          <caret line="467" column="25" lean-forward="true" selection-start-line="467" selection-start-column="25" selection-end-line="467" selection-end-column="25" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+  </component>
+  <component name="masterDetails">
+    <states>
+      <state key="GlobalLibrariesConfigurable.UI">
+        <settings>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="JdkListConfigurable.UI">
+        <settings>
+          <last-edited>1.8</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="ProjectJDKs.UI">
+        <settings>
+          <last-edited>1.8</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="ProjectLibrariesConfigurable.UI">
+        <settings>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+    </states>
+  </component>
+</project>

Checkbook/Checkbook.iml

@@ -5,11 +5,10 @@
     <output-test url="file://$MODULE_DIR$/target/test-classes" />
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/target" />
     </content>
-    <orderEntry type="jdk" jdkName="1.8" jdkType="JavaSDK" />
+    <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" name="Maven: junit:junit:4.0" level="project" />
   </component>

Checkbook/src/main/java/Checkbook.java

@@ -1,5 +1,126 @@
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.stream.Collectors;
+
 public class Checkbook {
 
     //blind us with your Java eloquence....
+    Payee owner;
+    double amount;
+
+    List<Transaction> transactions = new ArrayList<>();
+
+    public Checkbook(double cashAmount) {
+        this.amount = cashAmount;
+        new Checkbook(new Payee(), cashAmount);
+    }
+
+    public Checkbook(Payee owner, double cashAmount ) {
+        this.owner = owner;
+        this.amount = cashAmount;
+    }
+
+    public int size(){
+        return transactions.size();
+    }
+
+    public boolean isEmpty(){
+        return transactions.isEmpty();
+    }
+
+    public boolean contains(Transaction element){
+        return transactions.contains(element);
+    }
+
+    public boolean add(Transaction element){
+        return transactions.add(element);
+    }
+
+    public boolean remove(Transaction element){
+        return transactions.remove(element);
+    }
+
+    public Iterator iterator(){
+        return transactions.iterator();
+    }
+
+    public Transaction[] toArray(){
+        return transactions.toArray(new Transaction[transactions.size()]);
+    }
+
+    public Transaction[] toArray(Transaction[] a){
+        transactions.addAll(Arrays.asList(a));
+        return transactions.toArray(new Transaction[transactions.size()]);
+    }
+
+    public double checkbookValue(){
+        double sum = 0;
+        for(Transaction transaction : transactions){
+            sum += transaction.getAmount();
+        }
+        return sum;
+    }
+
+    public Transaction[] getTransactionsForDate(LocalDate aDate){
+        List<Transaction> list = new ArrayList<>();
+        for(Transaction transaction : transactions){
+            if(aDate.equals(transaction.getDate()))
+                list.add(transaction);
+        }
+
+        /*list = transactions.stream().collect(Collectors.groupingBy(Transaction::getDate))
+                .*/
+
+        return list.toArray(new Transaction[0]);
+    }
+
+
+    public Transaction[] getAllTransactionsForPayee(String name) {
+        List<Transaction> list = new ArrayList<>();
+        for(Transaction transaction : transactions){
+            if(transaction.getPayee().getGivenName().equals(name)){
+                list.add(transaction);
+            }
+        }
+        return list.toArray(new Transaction[list.size()]);
+    }
+
+    public Transaction[] getAllDebitTransactions() {
+        List<Transaction> list = new ArrayList<>();
+        for(Transaction transaction : transactions){
+            if(transaction.getType().equals(TransactionType.DEBIT)){
+                list.add(transaction);
+            }
+        }
+        return list.toArray(new Transaction[list.size()]);
+    }
+
+    public Transaction[] getAllCreditTransactions() {
+        List<Transaction> creditTransactions = new ArrayList<>();
+        for(Transaction transaction : transactions){
+            if(transaction.getType().equals(TransactionType.CREDIT))
+                 creditTransactions.add(transaction);
+        }
+        return creditTransactions.toArray(new Transaction[creditTransactions.size()]);
+    }
+
+    public boolean containsAll(List<Transaction> transactions2) {
+        return transactions.containsAll(transactions2);
+    }
+
+
+    public boolean addAll(List<Transaction> transactions2) {
+        return transactions.addAll(transactions2);
+    }
+
+    public boolean removeAll(List<Transaction> transactions2) {
+        return transactions.removeAll(transactions2);
+    }
 
+    public void clear() {
+        transactions.clear();
+    }
 }

Checkbook/src/main/java/GenericAccount.java

@@ -1,3 +1,4 @@
 
 public class GenericAccount {
+
 }

Checkbook/src/main/java/Payee.java

@@ -1,3 +1,5 @@
+import java.util.Objects;
+
 public class Payee {
 
     private String familyName;
@@ -30,4 +32,18 @@ public class Payee {
     // ... and a bunch more hidden stuff: for testing purposes only
 
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Payee payee = (Payee) o;
+        return Objects.equals(familyName, payee.familyName) &&
+                Objects.equals(givenName, payee.givenName) &&
+                Objects.equals(emailAddress, payee.emailAddress);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(familyName, givenName, emailAddress);
+    }
 }

Checkbook/src/main/java/Transaction.java

@@ -1,4 +1,5 @@
 import java.time.LocalDate;
+import java.util.Objects;
 import java.util.concurrent.atomic.AtomicReference;
 
 public class Transaction {
@@ -50,4 +51,22 @@ public class Transaction {
         }
         return (-1.0 * amount);
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Transaction that = (Transaction) o;
+        return Objects.equals(id, that.id) &&
+                Objects.equals(date, that.date) &&
+                Objects.equals(memo, that.memo) &&
+                Objects.equals(payee, that.payee) &&
+                typee == that.typee &&
+                Objects.equals(amount, that.amount);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, date, memo, payee, typee, amount);
+    }
 }

Checkbook/src/test/java/CheckbookTest.java

@@ -1,12 +1,472 @@
+import junit.framework.Assert;
+import org.junit.Test;
+
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
 import static org.junit.Assert.*;
 
 public class CheckbookTest {
+    Checkbook checkbook;
+    Transaction transaction;
+    Payee payee1;
+    Transaction transaction2;
+    Payee payee2;
+    Transaction transaction3;
+    Payee payee3;
+    Transaction transaction4;
+    Payee payee4;
+
 
     @org.junit.Before
     public void setUp() throws Exception {
+        checkbook = new Checkbook(20000);
+        payee1 = new Payee();
+        payee2 = new Payee();
+        payee3 = new Payee();
+        payee3 = new Payee();
+        transaction = new Transaction("one",payee1, TransactionType.DEBIT, 200.0);
+        transaction2 = new Transaction("two",payee2, TransactionType.CREDIT, 580.0);
+        transaction3 = new Transaction("three",payee3, TransactionType.DEBIT, 800.0);
+        transaction4 = new Transaction("four",payee4, TransactionType.CREDIT, 950.0);
     }
 
     @org.junit.After
     public void tearDown() throws Exception {
     }
+
+    @Test
+    public void test1AddAndSize(){
+        checkbook.add(transaction);
+        int expected = 1;
+        int actual = checkbook.size();
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test2AddAndSize(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        int expected = 2;
+        int actual = checkbook.size();
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test3AddAndSize(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        checkbook.add(transaction3);
+        int expected = 3;
+        int actual = checkbook.size();
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test1IsEmpty(){
+        checkbook.transactions.add(transaction3);
+        Assert.assertFalse(checkbook.isEmpty());
+    }
+
+    @Test
+    public void test2IsEmpty(){
+        checkbook.transactions.clear();
+        Assert.assertTrue(checkbook.isEmpty());
+    }
+
+    @Test
+    public void test3IsEmpty(){
+        checkbook.transactions.add(transaction);
+        checkbook.transactions.clear();
+        Assert.assertTrue(checkbook.isEmpty());
+    }
+
+    @Test
+    public void test1RemoveAndContains(){
+        checkbook.transactions.add(transaction3);
+        Assert.assertTrue(checkbook.contains(transaction3));
+        checkbook.remove(transaction3);
+        Assert.assertFalse(checkbook.contains(transaction3));
+    }
+
+    @Test
+    public void test2RemoveAndContains(){
+        checkbook.transactions.add(transaction2);
+        Assert.assertTrue(checkbook.contains(transaction2));
+        checkbook.remove(transaction2);
+        Assert.assertFalse(checkbook.contains(transaction2));
+    }
+
+    @Test
+    public void test3RemoveAndContains(){
+        checkbook.transactions.add(transaction);
+        Assert.assertTrue(checkbook.contains(transaction));
+        checkbook.remove(transaction);
+        Assert.assertFalse(checkbook.contains(transaction));
+    }
+
+    @Test
+    public void test1Iterator(){
+        checkbook.transactions.add(transaction);
+        Iterator iterator = checkbook.iterator();
+        Assert.assertTrue(iterator.hasNext());
+    }
+
+    @Test
+    public void test2Iterator(){
+        checkbook.transactions.clear();
+        Iterator iterator = checkbook.iterator();
+        Assert.assertFalse(iterator.hasNext());
+    }
+
+    @Test
+    public void test3Iterator(){
+        checkbook.transactions.add(transaction3);
+        Iterator iterator = checkbook.iterator();
+        Assert.assertTrue(iterator.hasNext());
+    }
+
+    @Test
+    public void test1ToArray(){
+        checkbook.add(transaction);
+        Transaction[] expected = {transaction};
+        Transaction[] actual = checkbook.toArray();
+        Assert.assertEquals(expected.length, actual.length);
+        Assert.assertEquals(expected[0], actual[0]);
+    }
+
+    @Test
+    public void test2ToArray(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        Transaction[] expected = {transaction,transaction2};
+        Transaction[] actual = checkbook.toArray();
+        Assert.assertEquals(expected.length, actual.length);
+        Assert.assertEquals(expected[0], actual[0]);
+        Assert.assertEquals(expected[1], actual[1]);
+    }
+
+    @Test
+    public void test3ToArray(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        checkbook.add(transaction3);
+        Transaction[] expected = {transaction, transaction2, transaction3};
+        Transaction[] actual = checkbook.toArray();
+        Assert.assertEquals(expected.length, actual.length);
+        Assert.assertEquals(expected[0], actual[0]);
+        Assert.assertEquals(expected[1], actual[1]);
+        Assert.assertEquals(expected[2], actual[2]);
+
+    }
+
+    @Test
+    public void test1ToArray2(){
+        checkbook.add(transaction);
+        Transaction[] transactions = {transaction2};
+        Transaction[] expected = {transaction, transaction2};
+        Transaction[] actual = checkbook.toArray(transactions);
+        Assert.assertEquals(expected.length, actual.length);
+        Assert.assertEquals(expected[0], actual[0]);
+        Assert.assertEquals(expected[1], actual[1]);
+    }
+
+    @Test
+    public void test2ToArray2(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        Transaction[] transactions = {transaction3};
+        Transaction[] expected = {transaction,transaction2, transaction3};
+        Transaction[] actual = checkbook.toArray(transactions);
+        Assert.assertEquals(expected.length, actual.length);
+        Assert.assertEquals(expected[0], actual[0]);
+        Assert.assertEquals(expected[1], actual[1]);
+        Assert.assertEquals(expected[2], actual[2]);
+    }
+
+    @Test
+    public void test3ToArray2(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        checkbook.add(transaction3);
+        Transaction[] transactions = {transaction4};
+        Transaction[] expected = {transaction, transaction2, transaction3, transaction4};
+        Transaction[] actual = checkbook.toArray(transactions);
+        Assert.assertEquals(expected.length, actual.length);
+        Assert.assertEquals(expected[0], actual[0]);
+        Assert.assertEquals(expected[1], actual[1]);
+        Assert.assertEquals(expected[2], actual[2]);
+        Assert.assertEquals(expected[3], actual[3]);
+    }
+
+    @Test
+    public void test1CheckBookValue(){
+        checkbook.add(transaction);
+        double expected = 200.0;
+        double actual = checkbook.checkbookValue();
+        Assert.assertEquals(expected, actual, 0.0);
+    }
+
+    @Test
+    public void test2CheckBookValue(){
+        checkbook.transactions.clear();
+        checkbook.add(transaction);
+        checkbook.add(transaction);
+        double expected = 400.0;
+        double actual = checkbook.checkbookValue();
+        Assert.assertEquals(expected, actual, 0.0);
+    }
+
+    @Test
+    public void test3CheckBookValue(){
+        checkbook.add(transaction);
+        checkbook.add(transaction3);
+        double expected = 1000.0;
+        double actual = checkbook.checkbookValue();
+        Assert.assertEquals(expected, actual, 0.0);
+    }
+
+    @Test
+    public void test1GetTransactionsForDate(){
+        checkbook.add(transaction);
+        Transaction[] expected = {transaction};
+        Transaction[] actual = checkbook.getTransactionsForDate(LocalDate.now());
+        Assert.assertEquals(expected.length, actual.length);
+    }
+
+    @Test
+    public void test2GetTransactionsForDate(){
+        checkbook.transactions.clear();
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        Transaction[] expected = {transaction, transaction2};
+        Transaction[] actual = checkbook.getTransactionsForDate(LocalDate.now());
+        Assert.assertEquals(expected.length, actual.length);
+    }
+
+    @Test
+    public void test3GetTransactionsForDate(){
+        checkbook.transactions.clear();
+        checkbook.add(transaction);
+        Transaction[] expected = {transaction};
+        Transaction[] actual = checkbook.getTransactionsForDate(LocalDate.now());
+        Assert.assertEquals(expected.length, actual.length);
+    }
+
+    @Test
+    public void test1GetAllTransactionsForPayee(){
+        payee1.setGivenName("thulasi");
+        payee1.setFamilyName("puppala");
+        payee1.setEmailAddress("thulasi@gmail.com");
+        checkbook.add(transaction);
+        Transaction[] expected = {transaction};
+        Transaction[] actual = checkbook.getAllTransactionsForPayee("thulasi");
+        Assert.assertEquals(expected[0], actual[0]);
+
+    }
+
+    @Test
+    public void test2GetAllTransactionsForPayee(){
+        payee2.setGivenName("sreeram");
+        payee2.setFamilyName("jonnageddala");
+        payee2.setEmailAddress("sreeram@gmail.com");
+        checkbook.add(transaction2);
+        Transaction[] expected = {transaction2};
+        Transaction[] actual = checkbook.getAllTransactionsForPayee("sreeram");
+        Assert.assertEquals(expected[0], actual[0]);
+
+    }
+
+    @Test
+    public void test3GetAllTransactionsForPayee(){
+        payee3.setGivenName("sreya");
+        payee3.setFamilyName("jonnageddala");
+        payee3.setEmailAddress("sreya@gmail.com");
+        checkbook.add(transaction3);
+        Transaction[] expected = {transaction3};
+        Transaction[] actual = checkbook.getAllTransactionsForPayee("sreya");
+        Assert.assertEquals(expected[0], actual[0]);
+
+    }
+
+    @Test
+    public void test1GetAllDebitTransactions(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        checkbook.add(transaction3);
+        Transaction[] expected = {transaction, transaction3};
+        Transaction[] actual = checkbook.getAllDebitTransactions();
+        Assert.assertEquals(expected[0], actual[0]);
+        Assert.assertEquals(expected[1], actual[1]);
+    }
+
+    @Test
+    public void test2GetAllDebitTransactions(){
+        checkbook.add(transaction);
+        Transaction[] expected = {transaction};
+        Transaction[] actual = checkbook.getAllDebitTransactions();
+        Assert.assertEquals(expected[0], actual[0]);
+    }
+
+    @Test
+    public void test3GetAllDebitTransactions(){
+        checkbook.transactions.clear();
+        Transaction[] expected = {};
+        Transaction[] actual = checkbook.getAllDebitTransactions();
+        Assert.assertEquals(expected.length, actual.length);
+    }
+
+    @Test
+    public void test1GetAllCreditTransactions(){
+        checkbook.add(transaction2);
+        checkbook.add(transaction3);
+        checkbook.add(transaction4);
+        Transaction[] expected = {transaction2, transaction4};
+        Transaction[] actual = checkbook.getAllCreditTransactions();
+        Assert.assertEquals(expected[0], actual[0]);
+        Assert.assertEquals(expected[1], actual[1]);
+    }
+
+    @Test
+    public void test2GetAllCreditTransactions(){
+        checkbook.transactions.clear();
+        checkbook.add(transaction);
+        Transaction[] expected = {};
+        Transaction[] actual = checkbook.getAllCreditTransactions();
+        Assert.assertEquals(expected.length, actual.length);
+    }
+
+    @Test
+    public void test3GetAllCreditTransactions(){
+        checkbook.transactions.clear();
+        Transaction[] expected = {};
+        Transaction[] actual = checkbook.getAllCreditTransactions();
+        Assert.assertEquals(expected.length, actual.length);
+    }
+
+    @Test
+    public void test1ContainsAll(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        List<Transaction> transactions = new ArrayList<>();
+        transactions.add(transaction);
+        transactions.add(transaction2);
+        boolean actual = checkbook.containsAll(transactions);
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void test2ContainsAll(){
+        checkbook.add(transaction2);
+        List<Transaction> transactions = new ArrayList<>();
+        transactions.add(transaction);
+        transactions.add(transaction2);
+        boolean actual = checkbook.containsAll(transactions);
+        Assert.assertFalse(actual);
+    }
+
+    @Test
+    public void test3ContainsAll(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        checkbook.add(transaction3);
+        List<Transaction> transactions = new ArrayList<>();
+        transactions.add(transaction);
+        transactions.add(transaction2);
+        transactions.add(transaction3);
+        boolean actual = checkbook.containsAll(transactions);
+        Assert.assertTrue(actual);
+    }
+
+
+    @Test
+    public void test1AddAll(){
+        List<Transaction> transactions = new ArrayList<>();
+        transactions.add(transaction);
+        transactions.add(transaction2);
+        boolean actual = checkbook.addAll(transactions);
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void test2AddAll(){
+        List<Transaction> transactions = new ArrayList<>();
+        transactions.add(transaction);
+        boolean actual = checkbook.addAll(transactions);
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void test3AddAll(){
+        List<Transaction> transactions = new ArrayList<>();
+        transactions.add(transaction);
+        transactions.add(transaction2);
+        transactions.add(transaction3);
+        boolean actual = checkbook.addAll(transactions);
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void test1removeAll(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        List<Transaction> transactions = new ArrayList<>();
+        transactions.add(transaction);
+        transactions.add(transaction2);
+        boolean actual = checkbook.removeAll(transactions);
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void test2removeAll(){
+        checkbook.add(transaction);
+        checkbook.add(transaction2);
+        checkbook.add(transaction);
+        List<Transaction> transactions = new ArrayList<>();
+        transactions.add(transaction3);
+        transactions.add(transaction2);
+        boolean actual = checkbook.removeAll(transactions);
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void test3removeAll(){
+        checkbook.add(transaction2);
+        checkbook.add(transaction4);
+        List<Transaction> transactions = new ArrayList<>();
+        transactions.add(transaction2);
+        transactions.add(transaction4);
+        boolean actual = checkbook.removeAll(transactions);
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void test1Clear(){
+        checkbook.add(transaction2);
+        checkbook.add(transaction3);
+        checkbook.add(transaction4);
+        checkbook.clear();
+        int expected = 0;
+        int actual = checkbook.size();
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test2Clear(){
+        checkbook.add(transaction4);
+        checkbook.clear();
+        int expected = 0;
+        int actual = checkbook.size();
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test3Clear(){
+        checkbook.clear();
+        int expected = 0;
+        int actual = checkbook.size();
+        Assert.assertEquals(expected, actual);
+    }
 }