blean bode

.idea/compiler.xml

@@ -0,0 +1,13 @@
+<?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="gkd" />
+      </profile>
+    </annotationProcessing>
+  </component>
+</project>

.idea/encodings.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$" charset="UTF-8" />
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <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://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/uiDesigner.xml

@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Palette2">
+    <group name="Swing">
+      <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
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+      <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
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+      <item class="javax.swing.JScrollPane" icon="/com/intellij/uiDesigner/icons/scrollPane.png" removable="false" auto-create-binding="false" can-attach-label="true">
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+      <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.png" removable="false" auto-create-binding="true" can-attach-label="false">
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+        <initial-values>
+          <property name="text" value="Button" />
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+      <item class="javax.swing.JRadioButton" icon="/com/intellij/uiDesigner/icons/radioButton.png" removable="false" auto-create-binding="true" can-attach-label="false">
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+        <initial-values>
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+        <initial-values>
+          <property name="text" value="Label" />
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+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
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+      <item class="javax.swing.JSeparator" icon="/com/intellij/uiDesigner/icons/separator.png" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3" />
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+      <item class="javax.swing.JProgressBar" icon="/com/intellij/uiDesigner/icons/progressbar.png" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1" />
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+      <item class="javax.swing.JToolBar" icon="/com/intellij/uiDesigner/icons/toolbar.png" removable="false" auto-create-binding="false" can-attach-label="false">
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+    </group>
+  </component>
+</project>

.idea/workspace.xml

@@ -0,0 +1,410 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ChangeListManager">
+    <list default="true" id="4a95b8d6-9c77-4832-be5e-9d0035f77dd8" name="Default" comment="" />
+    <ignored path="$PROJECT_DIR$/out/" />
+    <ignored path="$PROJECT_DIR$/target/" />
+    <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
+    <option name="TRACKING_ENABLED" value="true" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="FileEditorManager">
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+        <leaf>
+          <file leaf-file-name="Inventory.java" pinned="false" current-in-tab="true">
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+          </file>
+        </leaf>
+      </split-first>
+      <split-second>
+        <leaf>
+          <file leaf-file-name="InventoryTest.java" pinned="false" current-in-tab="true">
+            <entry file="file://$PROJECT_DIR$/src/test/java/kleankode/InventoryTest.java">
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+                    <element signature="imports" expanded="true" />
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+                </state>
+              </provider>
+            </entry>
+          </file>
+        </leaf>
+      </split-second>
+    </splitter>
+  </component>
+  <component name="IdeDocumentHistory">
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+        <option value="$PROJECT_DIR$/src/main/java/kleankode/Item.java" />
+        <option value="$PROJECT_DIR$/src/main/java/kleankode/Inventory.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="MavenImportPreferences">
+    <option name="importingSettings">
+      <MavenImportingSettings>
+        <option name="importAutomatically" value="true" />
+      </MavenImportingSettings>
+    </option>
+  </component>
+  <component name="NodePackageJsonFileManager">
+    <packageJsonPaths />
+  </component>
+  <component name="ProjectFrameBounds" extendedState="6">
+    <option name="x" value="4" />
+    <option name="y" value="4" />
+    <option name="width" value="1272" />
+    <option name="height" value="792" />
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+  <component name="ProjectView">
+    <navigator proportions="" version="1">
+      <foldersAlwaysOnTop value="true" />
+    </navigator>
+    <panes>
+      <pane id="Scope" />
+      <pane id="PackagesPane" />
+      <pane id="AndroidView" />
+      <pane id="ProjectPane">
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+          <expand>
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+              <item name="gkd" type="462c0819:PsiDirectoryNode" />
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+            <path>
+              <item name="gkd" type="b2602c69:ProjectViewProjectNode" />
+              <item name="gkd" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="gkd" type="b2602c69:ProjectViewProjectNode" />
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+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="gkd" type="b2602c69:ProjectViewProjectNode" />
+              <item name="gkd" type="462c0819:PsiDirectoryNode" />
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+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="gkd" type="b2602c69:ProjectViewProjectNode" />
+              <item name="gkd" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+              <item name="kleankode" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="gkd" type="b2602c69:ProjectViewProjectNode" />
+              <item name="gkd" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="test" type="462c0819:PsiDirectoryNode" />
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+            <path>
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+              <item name="test" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+              <item name="kleankode" type="462c0819:PsiDirectoryNode" />
+            </path>
+          </expand>
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+      </pane>
+    </panes>
+  </component>
+  <component name="PropertiesComponent">
+    <property name="WebServerToolWindowFactoryState" value="false" />
+    <property name="aspect.path.notification.shown" value="true" />
+    <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
+    <property name="nodejs_npm_path_reset_for_default_project" value="true" />
+  </component>
+  <component name="RecentsManager">
+    <key name="MoveClassesOrPackagesDialog.RECENTS_KEY">
+      <recent name="kleankode" />
+    </key>
+    <key name="MoveFile.RECENT_KEYS">
+      <recent name="$PROJECT_DIR$/src/main/java/kleankode" />
+    </key>
+  </component>
+  <component name="RunDashboard">
+    <option name="ruleStates">
+      <list>
+        <RuleState>
+          <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
+        </RuleState>
+        <RuleState>
+          <option name="name" value="StatusDashboardGroupingRule" />
+        </RuleState>
+      </list>
+    </option>
+  </component>
+  <component name="RunManager" selected="JUnit.InventoryTest">
+    <configuration default="true" type="Application" factoryName="Application">
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
+    </configuration>
+    <configuration name="InventoryTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="gkd" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="kleankode.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+      <option name="ALTERNATIVE_JRE_PATH" />
+      <option name="PACKAGE_NAME" value="kleankode" />
+      <option name="MAIN_CLASS_NAME" value="kleankode.InventoryTest" />
+      <option name="METHOD_NAME" />
+      <option name="TEST_OBJECT" value="class" />
+      <option name="VM_PARAMETERS" value="-ea" />
+      <option name="PARAMETERS" />
+      <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
+      <option name="PASS_PARENT_ENVS" value="true" />
+      <option name="TEST_SEARCH_SCOPE">
+        <value defaultName="singleModule" />
+      </option>
+      <patterns />
+    </configuration>
+    <configuration default="true" type="JUnit" factoryName="JUnit">
+      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+      <option name="ALTERNATIVE_JRE_PATH" />
+      <option name="PACKAGE_NAME" />
+      <option name="MAIN_CLASS_NAME" />
+      <option name="METHOD_NAME" />
+      <option name="TEST_OBJECT" value="class" />
+      <option name="VM_PARAMETERS" value="-ea" />
+      <option name="PARAMETERS" />
+      <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
+      <option name="PASS_PARENT_ENVS" value="true" />
+      <option name="TEST_SEARCH_SCOPE">
+        <value defaultName="singleModule" />
+      </option>
+      <patterns />
+    </configuration>
+    <configuration name="kleankode in gkd" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="gkd" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="kleankode.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+      <option name="ALTERNATIVE_JRE_PATH" />
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+      <option name="PARAMETERS" />
+      <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
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+      <option name="TEST_SEARCH_SCOPE">
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+      <option name="ALTERNATIVE_JRE_PATH" />
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+      <option name="TEST_OBJECT" value="CLASS" />
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+      <option name="PARAMETERS" />
+      <option name="WORKING_DIRECTORY" value="%MODULE_WORKING_DIR%" />
+      <option name="OUTPUT_DIRECTORY" />
+      <option name="PASS_PARENT_ENVS" value="true" />
+      <option name="TEST_SEARCH_SCOPE">
+        <value defaultName="singleModule" />
+      </option>
+      <option name="USE_DEFAULT_REPORTERS" value="false" />
+      <option name="PROPERTIES_FILE" />
+      <properties />
+      <listeners />
+    </configuration>
+    <list>
+      <item itemvalue="JUnit.kleankode in gkd" />
+      <item itemvalue="JUnit.InventoryTest" />
+    </list>
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+      <list>
+        <item itemvalue="JUnit.InventoryTest" />
+        <item itemvalue="JUnit.kleankode in gkd" />
+      </list>
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+  <component name="SvnConfiguration">
+    <configuration />
+  </component>
+  <component name="TaskManager">
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+      <changelist id="4a95b8d6-9c77-4832-be5e-9d0035f77dd8" name="Default" comment="" />
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+      <option name="presentableId" value="Default" />
+      <updated>1529518171660</updated>
+      <workItem from="1529518173174" duration="2988000" />
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+  <component name="TestHistory">
+    <history-entry file="InventoryTest - 2018.06.20 at 14h 49m 40s.xml">
+      <configuration name="InventoryTest" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="InventoryTest - 2018.06.20 at 14h 50m 13s.xml">
+      <configuration name="InventoryTest" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="InventoryTest - 2018.06.20 at 14h 50m 49s.xml">
+      <configuration name="InventoryTest" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="InventoryTest - 2018.06.20 at 14h 51m 00s.xml">
+      <configuration name="InventoryTest" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="InventoryTest - 2018.06.20 at 14h 51m 20s.xml">
+      <configuration name="InventoryTest" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="InventoryTest - 2018.06.20 at 14h 53m 05s.xml">
+      <configuration name="InventoryTest" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="InventoryTest - 2018.06.20 at 14h 54m 21s.xml">
+      <configuration name="InventoryTest" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="InventoryTest - 2018.06.20 at 14h 55m 30s.xml">
+      <configuration name="InventoryTest" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="InventoryTest - 2018.06.20 at 14h 56m 20s.xml">
+      <configuration name="InventoryTest" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="InventoryTest - 2018.06.20 at 14h 56m 34s.xml">
+      <configuration name="InventoryTest" configurationId="JUnit" />
+    </history-entry>
+  </component>
+  <component name="TimeTrackingManager">
+    <option name="totallyTimeSpent" value="2988000" />
+  </component>
+  <component name="ToolWindowManager">
+    <frame x="4" y="4" width="1272" height="792" extended-state="6" />
+    <editor active="true" />
+    <layout>
+      <window_info anchor="right" id="Key Promoter X" />
+      <window_info anchor="right" id="Palette" />
+      <window_info anchor="bottom" id="TODO" order="6" />
+      <window_info anchor="bottom" id="Messages" weight="0.3294964" />
+      <window_info anchor="right" id="Palette&#9;" />
+      <window_info id="Image Layers" />
+      <window_info anchor="right" id="Capture Analysis" />
+      <window_info anchor="bottom" id="Event Log" side_tool="true" />
+      <window_info anchor="right" id="Maven Projects" />
+      <window_info anchor="bottom" id="Database Changes" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Run" order="2" weight="0.3294964" />
+      <window_info anchor="bottom" id="Version Control" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Terminal" weight="0.3294964" />
+      <window_info id="Capture Tool" />
+      <window_info id="Designer" />
+      <window_info content_ui="combo" id="Project" order="0" weight="0.2495935" />
+      <window_info anchor="right" id="Database" />
+      <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
+      <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
+      <window_info id="UI Designer" />
+      <window_info anchor="right" id="Theme Preview" />
+      <window_info anchor="bottom" id="Debug" order="3" weight="0.4" />
+      <window_info id="Favorites" side_tool="true" />
+      <window_info anchor="bottom" id="Find" order="1" />
+      <window_info anchor="right" id="Commander" order="0" weight="0.4" />
+      <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
+      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" weight="0.25" />
+      <window_info anchor="bottom" id="Message" order="0" />
+      <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
+    </layout>
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="1" />
+  </component>
+  <component name="VcsContentAnnotationSettings">
+    <option name="myLimit" value="2678400000" />
+  </component>
+  <component name="XDebuggerManager">
+    <breakpoint-manager>
+      <option name="time" value="1" />
+    </breakpoint-manager>
+  </component>
+  <component name="editorHistoryManager">
+    <entry file="file://$PROJECT_DIR$/pom.xml">
+      <provider selected="true" editor-type-id="text-editor" />
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/kleankode/Item.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="176">
+          <caret line="12" column="4" selection-start-line="12" selection-start-column="4" selection-end-line="12" selection-end-column="4" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/kleankode/InventoryTest.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="-1296">
+          <caret line="7" column="1" selection-start-line="7" selection-start-column="1" selection-end-line="7" selection-end-column="1" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/kleankode/Inventory.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="416">
+          <caret line="34" column="43" selection-start-line="34" selection-start-column="43" selection-end-line="34" selection-end-column="43" />
+        </state>
+      </provider>
+    </entry>
+  </component>
+  <component name="masterDetails">
+    <states>
+      <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>
+    </states>
+  </component>
+</project>

README.MD

@@ -0,0 +1,73 @@
+# Clean Code
+
+### **Objective:**
+* Refactor (aka clean up) the code in the `Inventory` class to make it more maintainable and readable.
+
+### **Purpose:**
+* To understand why writing test matter
+* To understand why writing readable code matter
+
+### **Instructions:**
+
+1. Fork this Repository
+    * [fork](https://help.github.com/articles/fork-a-repo/) this repository to your personal github account
+    * [clone](https://help.github.com/articles/cloning-a-repository/) **your** `forked` repository to your local machine.
+    * clean up the code in the `Inventory` class
+    * commit your changes
+    * submit a `pull request` which compares Zipcoder `master` to your `master`.
+3. DO NOT CHANGE THE TEST OR THE ITEM CLASS
+
+# Levels
+This lab is divided into two levels. Level two has more code and is more difficult. If you are 90% done with your labs or if you want to challenge yourself, get level2 with `git checkout level2` after you clone the repository. Otherwise, work on the master branch.
+
+# Part 1 - Original Description of the Gilded Rose
+
+Hi and welcome to team Gilded Rose. As you know, we are a small inn
+with a prime location in a prominent city run by a friendly innkeeper
+named Allison. We also buy and sell only the finest
+goods. Unfortunately, our goods are constantly degrading in quality as
+they approach their sell by date. We have a system in place that
+updates our inventory for us. It was developed by a no-nonsense type
+named Leeroy, who has moved on to new adventures. Your task is to add
+the new feature to our system so that we can begin selling a new
+category of items. First an introduction to our system:
+
+- All items have a SellIn value which denotes the number of days we
+  have to sell the item
+- All items have a Quality value which denotes how valuable the item
+  is
+- At the end of each day our system lowers both values for every item
+
+Pretty simple, right? Well this is where it gets interesting:
+
+  - Once the sell by date has passed, Quality degrades twice as fast
+  - The Quality of an item is never negative
+  - "Aged Brie" actually increases in Quality the older it gets
+  - The Quality of an item is never more than 50
+  - "Sulfuras", being a legendary item, never has to be sold or
+    decreases in Quality
+
+Just for clarification, an item can never have its Quality increase
+above 50, however "Sulfuras" is a legendary item and as such its
+Quality is 80 and it never alters.
+
+DO NOT alter the Item class or Items property as those belong to the goblin
+in the corner who will insta-rage and one-shot you as he doesn't
+believe in shared code ownership (you can make the UpdateQuality
+method and Items property static if you like, we'll cover for
+you).
+
+## Part 2 - Add a new item
+
+We have recently signed a supplier of conjured items. This requires an update to our system:
+
+- "Conjured" items degrade in Quality twice as fast as normal items
+
+Feel free to make any changes to the UpdateQuality method and add any
+new code as long as everything still works correctly.
+
+## Rules
+* No more than two nested if statement in a method
+* Don't use the `!` for your if statement
+
+This was "borrowed" from [alexaitken](https://github.com/alexaitken/GildedRose_java) which originated from [Bobby Johnson's Blog](https://iamnotmyself.com/2011/02/13/refactor-this-the-gilded-rose-kata/).

gkd.iml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4" />

pom.xml

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>kleankode</groupId>
+  <artifactId>gkd</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <name>gkd</name>
+  <!-- FIXME change it to the project's website -->
+  <url>http://www.example.com</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.source>1.7</maven.compiler.source>
+    <maven.compiler.target>1.7</maven.compiler.target>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.11</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+      <plugins>
+        <plugin>
+          <artifactId>maven-clean-plugin</artifactId>
+          <version>3.0.0</version>
+        </plugin>
+        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
+        <plugin>
+          <artifactId>maven-resources-plugin</artifactId>
+          <version>3.0.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <version>3.7.0</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <version>2.20.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-jar-plugin</artifactId>
+          <version>3.0.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-install-plugin</artifactId>
+          <version>2.5.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-deploy-plugin</artifactId>
+          <version>2.8.2</version>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>

src/main/java/kleankode/Inventory.java

@@ -0,0 +1,44 @@
+package kleankode;
+
+public class Inventory {
+    private Item[] items;
+
+    public Inventory(Item[] items) {
+        super();
+        this.items = items;
+    }
+
+    public void updateQuality() {
+        for (Item e : items) {
+            String name = e.getName();
+            int quality = e.getQuality();
+            int sellIn = e.getSellIn();
+
+            if (name.equals("Sulfuras, Hand of Ragnaros")) continue;
+
+            if (name.equals("Aged Brie")) {
+                sellIn -= 1;
+                e.setSellIn(sellIn);
+
+                quality = quality + 2 <= 50 && sellIn < 0
+                        ? e.getQuality() + 2
+                        : quality + 1 <= 50
+                        ? e.getQuality() + 1
+                        : quality;
+                e.setQuality(quality);
+            } else {
+                sellIn -= 1;
+                e.setSellIn(sellIn);
+
+                int reducer = name.equals("Conjured") ? 2 : 1;
+
+                quality = quality > 0 && sellIn < 0
+                        ? e.getQuality() - 2 * reducer
+                        : quality > 0
+                        ? e.getQuality() - reducer
+                        : quality;
+                e.setQuality(quality);
+            }
+        }
+    }
+}

src/main/java/kleankode/Item.java

@@ -0,0 +1,38 @@
+package kleankode;
+
+public class Item {
+    private String name;
+    private int sellIn;
+    private int quality;
+
+    public Item(String name, int sellIn, int quality) {
+        super();
+        this.name = name;
+        this.sellIn = sellIn;
+        this.quality = quality;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getSellIn() {
+        return sellIn;
+    }
+
+    public void setSellIn(int sellIn) {
+        this.sellIn = sellIn;
+    }
+
+    public int getQuality() {
+        return quality;
+    }
+
+    public void setQuality(int quality) {
+        this.quality = quality;
+    }
+}

src/test/java/kleankode/InventoryTest.java

@@ -0,0 +1,124 @@
+package kleankode;
+
+import static org.junit.Assert.*;
+import java.util.Arrays;
+import org.junit.Test;
+import org.junit.Before;
+
+public class InventoryTest {
+    private static final int MAX_QUALITY = 50;
+    private static final String AGED_BRIE_NAME = "Aged Brie";
+    private static final String BACKSTAGE_PASS_NAME = "Backstage passes to a TAFKAL80ETC concert";
+    private static final String NORMAL_ITEM_NAME = "+5 Dexterity Vest";
+
+    private Item sulfuras;
+    private Item normalItem;
+
+    @Before
+    public void setup(){
+        sulfuras = new Item("Sulfuras, Hand of Ragnaros", 0, 80);
+        normalItem = new Item(NORMAL_ITEM_NAME, 10, 20);
+    }
+
+    @Test
+    public void testUpdate_ForSulfurasQuality() throws Exception {
+        int expectedQuality = sulfuras.getQuality();
+        Item[] items = {sulfuras};
+        Inventory sut = new Inventory(items);
+
+        sut.updateQuality();
+
+        assertEquals(expectedQuality, sulfuras.getQuality());
+    }
+    @Test
+    public void testUpdate_ForSulfurasSellIn() throws Exception {
+        int expectedSellIn = sulfuras.getSellIn();
+        Item[] items = {sulfuras};
+        Inventory sut = new Inventory(items);
+
+        sut.updateQuality();
+
+        assertEquals(expectedSellIn, sulfuras.getSellIn());
+    }
+
+    @Test
+    public void testUpdate_ForNormalItemSellIn() throws Exception {
+        int expectedSellIn = normalItem.getSellIn() - 1;
+        Item[] items = {normalItem};
+        Inventory sut = new Inventory(items);
+
+        sut.updateQuality();
+
+        assertEquals(expectedSellIn, normalItem.getSellIn());
+    }
+
+    @Test
+    public void testUpdate_ForNormalItemQuantity() throws Exception {
+        int expectedQuality = normalItem.getQuality() - 1;
+        Item[] items = {normalItem};
+        Inventory sut = new Inventory(items);
+
+        sut.updateQuality();
+
+        assertEquals(expectedQuality, normalItem.getQuality());
+    }
+
+    @Test
+    public void testUpdate_ForSoldOutItem() throws Exception {
+        int minimumQuality = 0;
+        Item normalItemWithMinimumQuality = new Item(NORMAL_ITEM_NAME, 10, minimumQuality);
+        Item[] items = {normalItemWithMinimumQuality};
+        Inventory sut = new Inventory(items);
+
+        sut.updateQuality();
+
+        assertEquals(minimumQuality, normalItemWithMinimumQuality.getQuality());
+    }
+
+    @Test
+    public void testUpdate_ForNormalItemOnceTheSellInDatePassed() throws Exception {
+        Item normalItemWithPassedSellDate = new Item(NORMAL_ITEM_NAME, -1, 25);
+        int expectedQuality = normalItemWithPassedSellDate.getQuality() - 2;
+        Item[] items = {normalItemWithPassedSellDate};
+        Inventory sut = new Inventory(items);
+
+        sut.updateQuality();
+
+        assertEquals(expectedQuality, normalItemWithPassedSellDate.getQuality());
+    }
+
+    @Test
+    public void testUpdate_AgedBrie() throws Exception {
+        Item agedBrie = new Item(AGED_BRIE_NAME, 10, 25);
+        int expectedQuality = agedBrie.getQuality() + 1;
+        Item[] items = {agedBrie};
+        Inventory sut = new Inventory(items);
+
+        sut.updateQuality();
+
+        assertEquals(expectedQuality, agedBrie.getQuality());
+    }
+
+    @Test
+    public void testUpdate_WhenAgedBrieIsAtMaxQuality() throws Exception {
+        Item agedBrie = new Item(AGED_BRIE_NAME, 10, MAX_QUALITY);
+        Item[] items = {agedBrie};
+        Inventory sut = new Inventory(items);
+
+        sut.updateQuality();
+
+        assertEquals(MAX_QUALITY, agedBrie.getQuality());
+    }
+
+    @Test
+    public void testUpdate_WhenAgedBrieOnceTheSellInDatePassed() throws Exception {
+        Item agedBrie = new Item(AGED_BRIE_NAME, -1, 20);
+        int expectedQuality = agedBrie.getQuality() + 2;
+        Item[] items = {agedBrie};
+        Inventory sut = new Inventory(items);
+
+        sut.updateQuality();
+
+        assertEquals(expectedQuality, agedBrie.getQuality());
+    }
+}