Completed part 5.0

.idea/workspace.xml

@@ -2,8 +2,9 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="c0f7ce67-c21c-4eff-a696-290be3222ea8" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Teacher.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestInstructor.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
     </list>
     <ignored path="$PROJECT_DIR$/target/" />
@@ -24,6 +25,9 @@
       <FILTER>io.zipcoder.interfaces.*</FILTER>
     </SUITE>
   </component>
+  <component name="CoverageViewManager">
+    <option name="myElementSize" value="176" />
+  </component>
   <component name="FUSProjectUsageTrigger">
     <session id="-945268981">
       <usages-collector id="statistics.lifecycle.project">
@@ -34,54 +38,35 @@
       </usages-collector>
       <usages-collector id="statistics.file.extensions.open">
         <counts>
-          <entry key="java" value="5" />
+          <entry key="java" value="10" />
           <entry key="project" value="1" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.open">
         <counts>
           <entry key="Eclipse" value="1" />
-          <entry key="JAVA" value="5" />
+          <entry key="JAVA" value="10" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.extensions.edit">
         <counts>
-          <entry key="java" value="714" />
+          <entry key="java" value="1755" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.edit">
         <counts>
-          <entry key="JAVA" value="714" />
+          <entry key="JAVA" value="1755" />
         </counts>
       </usages-collector>
     </session>
   </component>
   <component name="FileEditorManager">
     <leaf>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Person.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="179">
-              <caret line="13" column="21" selection-start-line="13" selection-start-column="21" selection-end-line="13" selection-end-column="21" />
-              <folding>
-                <element signature="e#231#232#0" expanded="true" />
-                <element signature="e#259#260#0" expanded="true" />
-                <element signature="e#129#130#0" expanded="true" />
-                <element signature="e#156#157#0" expanded="true" />
-                <element signature="e#196#197#0" expanded="true" />
-                <element signature="e#228#229#0" expanded="true" />
-                <element signature="e#439#440#0" expanded="true" />
-                <element signature="e#464#465#0" expanded="true" />
-              </folding>
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestPerson.java">
+      <file pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestInstructor.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="233">
-              <caret line="27" column="8" lean-forward="true" selection-start-line="27" selection-start-column="8" selection-end-line="30" selection-end-column="41" />
+            <state relative-caret-position="267">
+              <caret line="42" column="27" selection-start-line="42" selection-start-column="27" selection-end-line="42" selection-end-column="27" />
               <folding>
                 <element signature="imports" expanded="true" />
               </folding>
@@ -90,42 +75,30 @@
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Learner.java">
+        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="45">
-              <caret line="3" column="37" selection-start-line="3" selection-start-column="37" selection-end-line="3" selection-end-column="37" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="308">
-              <caret line="34" column="29" selection-start-line="34" selection-start-column="29" selection-end-line="34" selection-end-column="29" />
+            <state relative-caret-position="315">
+              <caret line="21" column="1" lean-forward="true" selection-start-line="21" selection-start-column="1" selection-end-line="21" selection-end-column="1" />
               <folding>
-                <element signature="imports" expanded="true" />
+                <element signature="e#138#139#0" expanded="true" />
+                <element signature="e#169#170#0" expanded="true" />
+                <element signature="e#203#204#0" expanded="true" />
+                <element signature="e#228#229#0" expanded="true" />
+                <element signature="e#292#293#0" expanded="true" />
+                <element signature="e#315#316#0" expanded="true" />
               </folding>
             </state>
           </provider>
         </entry>
       </file>
-      <file pinned="false" current-in-tab="true">
+      <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="188">
-              <caret line="15" column="40" selection-start-line="15" selection-start-column="40" selection-end-line="15" selection-end-column="40" />
+            <state relative-caret-position="225">
+              <caret line="21" selection-start-line="21" selection-end-line="21" />
               <folding>
-                <element signature="e#185#186#0" expanded="true" />
-                <element signature="e#216#217#0" expanded="true" />
-                <element signature="e#247#248#0" expanded="true" />
-                <element signature="e#272#273#0" expanded="true" />
                 <element signature="e#293#294#0" expanded="true" />
-                <element signature="e#339#340#0" expanded="true" />
-                <element signature="e#341#342#0" expanded="true" />
-                <element signature="e#378#379#0" expanded="true" />
-                <element signature="e#438#439#0" expanded="true" />
-                <element signature="e#490#491#0" expanded="true" />
+                <element signature="e#340#341#0" expanded="true" />
               </folding>
             </state>
           </provider>
@@ -152,6 +125,9 @@
         <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Learner.java" />
         <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java" />
         <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Teacher.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java" />
+        <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestInstructor.java" />
       </list>
     </option>
   </component>
@@ -239,7 +215,7 @@
   <component name="PropertiesComponent">
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="aspect.path.notification.shown" value="true" />
-    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1541215659696" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1541218571626" />
     <property name="last_opened_file_path" value="$PROJECT_DIR$" />
     <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
     <property name="nodejs_npm_path_reset_for_default_project" value="true" />
@@ -256,8 +232,8 @@
       </list>
     </option>
   </component>
-  <component name="RunManager" selected="JUnit.TestStudent">
-    <configuration name="TestStudent" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+  <component name="RunManager" selected="JUnit.TestInstructor">
+    <configuration name="TestInstructor" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
@@ -266,12 +242,12 @@
         </pattern>
       </extension>
       <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
-      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestStudent" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestInstructor" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="TestStudent.testImplementation" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="TestInstructor.testImplementation" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
@@ -280,14 +256,14 @@
         </pattern>
       </extension>
       <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
-      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestStudent" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestInstructor" />
       <option name="METHOD_NAME" value="testImplementation" />
       <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="TestStudent.testInheritance" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="TestInstructor.testInheritance" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
@@ -296,14 +272,14 @@
         </pattern>
       </extension>
       <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
-      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestStudent" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestInstructor" />
       <option name="METHOD_NAME" value="testInheritance" />
       <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="TestStudent.testLearn" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="TestInstructor.testLecture" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
@@ -312,14 +288,14 @@
         </pattern>
       </extension>
       <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
-      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestStudent" />
-      <option name="METHOD_NAME" value="testLearn" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestInstructor" />
+      <option name="METHOD_NAME" value="testLecture" />
       <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="io.zipcoder.interfaces in interfaces-1" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="TestInstructor.testTeach" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
@@ -328,25 +304,27 @@
         </pattern>
       </extension>
       <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
-      <option name="TEST_OBJECT" value="package" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestInstructor" />
+      <option name="METHOD_NAME" value="testTeach" />
+      <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
     <list>
-      <item itemvalue="JUnit.TestStudent.testImplementation" />
-      <item itemvalue="JUnit.TestStudent.testInheritance" />
-      <item itemvalue="JUnit.TestStudent.testLearn" />
-      <item itemvalue="JUnit.TestStudent" />
-      <item itemvalue="JUnit.io.zipcoder.interfaces in interfaces-1" />
+      <item itemvalue="JUnit.TestInstructor.testImplementation" />
+      <item itemvalue="JUnit.TestInstructor.testTeach" />
+      <item itemvalue="JUnit.TestInstructor.testLecture" />
+      <item itemvalue="JUnit.TestInstructor.testInheritance" />
+      <item itemvalue="JUnit.TestInstructor" />
     </list>
     <recent_temporary>
       <list>
-        <item itemvalue="JUnit.TestStudent" />
-        <item itemvalue="JUnit.TestStudent.testImplementation" />
-        <item itemvalue="JUnit.io.zipcoder.interfaces in interfaces-1" />
-        <item itemvalue="JUnit.TestStudent.testLearn" />
-        <item itemvalue="JUnit.TestStudent.testInheritance" />
+        <item itemvalue="JUnit.TestInstructor" />
+        <item itemvalue="JUnit.TestInstructor.testLecture" />
+        <item itemvalue="JUnit.TestInstructor.testTeach" />
+        <item itemvalue="JUnit.TestInstructor.testInheritance" />
+        <item itemvalue="JUnit.TestInstructor.testImplementation" />
       </list>
     </recent_temporary>
   </component>
@@ -360,44 +338,44 @@
       <option name="number" value="Default" />
       <option name="presentableId" value="Default" />
       <updated>1541213342172</updated>
-      <workItem from="1541213343574" duration="2003000" />
+      <workItem from="1541213343574" duration="4761000" />
     </task>
     <servers />
   </component>
   <component name="TestHistory">
-    <history-entry file="TestPerson_testConstructor - 2018.11.02 at 23h 00m 15s.xml">
-      <configuration name="TestPerson.testConstructor" configurationId="JUnit" />
+    <history-entry file="TestInstructor_testTeach - 2018.11.03 at 00h 00m 03s.xml">
+      <configuration name="TestInstructor.testTeach" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="TestPerson_testConstructorId - 2018.11.02 at 23h 00m 21s.xml">
-      <configuration name="TestPerson.testConstructorId" configurationId="JUnit" />
+    <history-entry file="TestInstructor_testTeach - 2018.11.03 at 00h 00m 34s.xml">
+      <configuration name="TestInstructor.testTeach" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="TestPerson_testConstructorId - 2018.11.02 at 23h 00m 24s.xml">
-      <configuration name="TestPerson.testConstructorId" configurationId="JUnit" />
+    <history-entry file="TestInstructor_testLecture - 2018.11.03 at 00h 03m 04s.xml">
+      <configuration name="TestInstructor.testLecture" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="TestPerson - 2018.11.02 at 23h 00m 29s.xml">
-      <configuration name="TestPerson" configurationId="JUnit" />
+    <history-entry file="TestInstructor_testInheritance - 2018.11.03 at 00h 04m 06s.xml">
+      <configuration name="TestInstructor.testInheritance" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="TestPerson_testSetName - 2018.11.02 at 23h 03m 13s.xml">
-      <configuration name="TestPerson.testSetName" configurationId="JUnit" />
+    <history-entry file="TestInstructor_testTeach - 2018.11.03 at 00h 08m 02s.xml">
+      <configuration name="TestInstructor.testTeach" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="TestPerson - 2018.11.02 at 23h 03m 23s.xml">
-      <configuration name="TestPerson" configurationId="JUnit" />
+    <history-entry file="TestInstructor_testTeach - 2018.11.03 at 00h 11m 43s.xml">
+      <configuration name="TestInstructor.testTeach" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="TestStudent_testInheritance - 2018.11.02 at 23h 17m 24s.xml">
-      <configuration name="TestStudent.testInheritance" configurationId="JUnit" />
+    <history-entry file="TestPerson_testConstructorId - 2018.11.03 at 00h 12m 02s.xml">
+      <configuration name="TestPerson.testConstructorId" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="TestStudent_testLearn - 2018.11.02 at 23h 21m 58s.xml">
-      <configuration name="TestStudent.testLearn" configurationId="JUnit" />
+    <history-entry file="TestInstructor_testTeach - 2018.11.03 at 00h 12m 09s.xml">
+      <configuration name="TestInstructor.testTeach" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="TestStudent_testLearn - 2018.11.02 at 23h 22m 11s.xml">
-      <configuration name="TestStudent.testLearn" configurationId="JUnit" />
+    <history-entry file="TestInstructor_testTeach - 2018.11.03 at 00h 12m 27s.xml">
+      <configuration name="TestInstructor.testTeach" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="TestStudent_testLearn - 2018.11.02 at 23h 22m 55s.xml">
-      <configuration name="TestStudent.testLearn" configurationId="JUnit" />
+    <history-entry file="TestInstructor_testTeach - 2018.11.03 at 00h 13m 37s.xml">
+      <configuration name="TestInstructor.testTeach" configurationId="JUnit" />
     </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="2003000" />
+    <option name="totallyTimeSpent" value="4761000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="0" width="1280" height="800" extended-state="0" />
@@ -413,7 +391,7 @@
       <window_info anchor="bottom" id="Messages" weight="0.32876712" />
       <window_info anchor="bottom" id="Database Changes" show_stripe_button="false" />
       <window_info anchor="bottom" id="Version Control" show_stripe_button="false" />
-      <window_info anchor="bottom" id="Terminal" />
+      <window_info anchor="bottom" id="Terminal" weight="0.32876712" />
       <window_info anchor="bottom" id="Event Log" side_tool="true" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" />
@@ -471,6 +449,23 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="15">
+          <caret line="7" column="4" selection-start-line="7" selection-start-column="4" selection-end-line="38" selection-end-column="5" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Teacher.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="45">
+          <caret line="3" column="4" selection-start-line="3" selection-start-column="4" selection-end-line="3" selection-end-column="4" />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Learner.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="45">
@@ -478,31 +473,38 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java">
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="308">
-          <caret line="34" column="29" selection-start-line="34" selection-start-column="29" selection-end-line="34" selection-end-column="29" />
+        <state relative-caret-position="225">
+          <caret line="21" selection-start-line="21" selection-end-line="21" />
           <folding>
-            <element signature="imports" expanded="true" />
+            <element signature="e#293#294#0" expanded="true" />
+            <element signature="e#340#341#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java">
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="188">
-          <caret line="15" column="40" selection-start-line="15" selection-start-column="40" selection-end-line="15" selection-end-column="40" />
+        <state relative-caret-position="315">
+          <caret line="21" column="1" lean-forward="true" selection-start-line="21" selection-start-column="1" selection-end-line="21" selection-end-column="1" />
           <folding>
-            <element signature="e#185#186#0" expanded="true" />
-            <element signature="e#216#217#0" expanded="true" />
-            <element signature="e#247#248#0" expanded="true" />
-            <element signature="e#272#273#0" expanded="true" />
-            <element signature="e#293#294#0" expanded="true" />
-            <element signature="e#339#340#0" expanded="true" />
-            <element signature="e#341#342#0" expanded="true" />
-            <element signature="e#378#379#0" expanded="true" />
-            <element signature="e#438#439#0" expanded="true" />
-            <element signature="e#490#491#0" expanded="true" />
+            <element signature="e#138#139#0" expanded="true" />
+            <element signature="e#169#170#0" expanded="true" />
+            <element signature="e#203#204#0" expanded="true" />
+            <element signature="e#228#229#0" expanded="true" />
+            <element signature="e#292#293#0" expanded="true" />
+            <element signature="e#315#316#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestInstructor.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="267">
+          <caret line="42" column="27" selection-start-line="42" selection-start-column="27" selection-end-line="42" selection-end-column="27" />
+          <folding>
+            <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>

src/main/java/io/zipcoder/interfaces/Instructor.java

@@ -0,0 +1,22 @@
+package io.zipcoder.interfaces;
+
+public class Instructor extends Person implements Teacher {
+
+    public Instructor(long id, String name) {
+        super(id, name);
+    }
+
+    public Instructor(long id) {
+        super(id);
+    }
+
+    public void teach(Learner learner, double numberOfHours) {
+        learner.learn(numberOfHours);
+    }
+
+    public void lecture(Learner[] learners, double numberOfHours) {
+        for(int i = 0; i < learners.length; i++) {
+            learners[i].learn(numberOfHours / learners.length);
+        }
+    }
+}

src/main/java/io/zipcoder/interfaces/Teacher.java

@@ -0,0 +1,7 @@
+package io.zipcoder.interfaces;
+
+public interface Teacher {
+    void teach(Learner learner, double numberOfHours);
+
+    void lecture(Learner[] learners, double numberOfHours);
+}

src/test/java/io/zipcoder/interfaces/TestInstructor.java

@@ -0,0 +1,50 @@
+package io.zipcoder.interfaces;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestInstructor {
+
+    @Test
+    public void testImplementation(){
+        Instructor instructor = new Instructor(54, "Mr.Bean");
+        Assert.assertTrue(instructor instanceof Person);
+    }
+
+    @Test
+    public void testInheritance(){
+        Instructor instructor = new Instructor(54, "Mr.Bean");
+        Assert.assertTrue(instructor instanceof Teacher);
+    }
+
+    @Test
+    public void testTeach(){
+        Instructor instructor = new Instructor(54, "Mr.Bean");
+        Student student = new Student(1, "William");
+
+        instructor.teach(student, 2);
+
+        double expected = 2;
+        double actual = student.totalStudyTime;
+
+        Assert.assertEquals(expected, actual, 0);
+    }
+
+    @Test
+    public void testLecture(){
+        Instructor instructor = new Instructor(54, "Mr.Bean");
+        Student William = new Student(1, "William");
+        Student James = new Student(3, "James");
+
+        Learner[] learners = {William, James};
+
+        instructor.lecture(learners, 2);
+
+        double expected = 1;
+        double actualWilliam = William.totalStudyTime;
+        double actualJames = James.totalStudyTime;
+
+        Assert.assertEquals(expected, actualWilliam, 0);
+        Assert.assertEquals(expected, actualJames, 0);
+    }
+}