From b825a3683c652d733ca9b96ebeaffd3bf90a7a07 Mon Sep 17 00:00:00 2001
From: Paul Houle <paul@ontology2.com>
Date: Sun, 15 Dec 2013 13:35:27 -0500
Subject: [PATCH] #92 write unit test for mapper,  fix types,  make
 non-abstract,  things like that.

---
 .idea/workspace.xml                           | 114 +++++++++++-------
 .../entityCentric/EntityCentricMapper.java    |  11 +-
 .../EntityCentricMapperTest.java              |  29 +++++
 3 files changed, 103 insertions(+), 51 deletions(-)
 create mode 100644 bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityCentricMapperTest.java

diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 079fa73..411490c 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,7 +2,8 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="87a5655c-6aba-400c-a88c-ad04aa82a448" name="Default" comment="">
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/ExtractIsATool.java" afterPath="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/ExtractIsATool.java" />
+      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityCentricMapperTest.java" />
+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java" afterPath="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
     </list>
     <ignored path="infovore.iws" />
@@ -151,7 +152,7 @@
             <file leaf-file-name="DiffFactsTool.java" pinned="false" current="false" current-in-tab="true">
               <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/diffFacts/DiffFactsTool.java">
                 <provider selected="true" editor-type-id="text-editor">
-                  <state line="77" column="0" selection-start="2994" selection-end="3128" vertical-scroll-proportion="0.74333924" vertical-offset="81" max-vertical-offset="1207">
+                  <state line="69" column="78" selection-start="2744" selection-end="2744" vertical-scroll-proportion="0.6225577" vertical-offset="81" max-vertical-offset="1207">
                     <folding />
                   </state>
                 </provider>
@@ -200,7 +201,7 @@
       <file leaf-file-name="EntityCentricMapper.java" pinned="false" current="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state line="13" column="14" selection-start="544" selection-end="544" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="527">
+            <state line="22" column="18" selection-start="892" selection-end="892" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="476">
               <folding>
                 <element signature="imports" expanded="true" />
               </folding>
@@ -208,10 +209,19 @@
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="ExtractIsATool.java" pinned="false" current="true" current-in-tab="true">
+      <file leaf-file-name="LocalCache.class" pinned="false" current="false" current-in-tab="false">
+        <entry file="jar://$MAVEN_REPOSITORY$/com/google/guava/guava/15.0/guava-15.0.jar!/com/google/common/cache/LocalCache.class">
+          <provider selected="true" editor-type-id="text-editor">
+            <state line="1136" column="41" selection-start="58734" selection-end="58734" vertical-scroll-proportion="-57.88" vertical-offset="17848" max-vertical-offset="19601">
+              <folding />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="ExtractIsATool.java" pinned="false" current="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/ExtractIsATool.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state line="41" column="62" selection-start="1428" selection-end="1428" vertical-scroll-proportion="0.48055556" vertical-offset="283" max-vertical-offset="1564">
+            <state line="48" column="83" selection-start="1795" selection-end="1795" vertical-scroll-proportion="0.0" vertical-offset="436" max-vertical-offset="1564">
               <folding>
                 <element signature="imports" expanded="true" />
               </folding>
@@ -242,9 +252,18 @@
       <file leaf-file-name="EntityIsAReducerTest.java" pinned="false" current="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityIsAReducerTest.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state line="17" column="29" selection-start="476" selection-end="476" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="986">
+            <state line="12" column="0" selection-start="311" selection-end="347" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="1156">
+              <folding />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="EntityCentricMapperTest.java" pinned="false" current="true" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityCentricMapperTest.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state line="26" column="64" selection-start="833" selection-end="833" vertical-scroll-proportion="0.61388886" vertical-offset="0" max-vertical-offset="720">
               <folding>
-                <element signature="imports" expanded="false" />
+                <element signature="imports" expanded="true" />
               </folding>
             </state>
           </provider>
@@ -298,12 +317,13 @@
         <option value="$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/entityCentric.java" />
         <option value="$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityIsAReducer.java" />
         <option value="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityMatchesRuleReducer.java" />
-        <option value="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java" />
         <option value="$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityIsAReducerTest.java" />
         <option value="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/IsAConfiguration.java" />
         <option value="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/ExtractIsAOptions.java" />
         <option value="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/diffFacts/DiffFactsOptions.java" />
         <option value="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/ExtractIsATool.java" />
+        <option value="$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java" />
+        <option value="$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityCentricMapperTest.java" />
       </list>
     </option>
   </component>
@@ -1603,12 +1623,16 @@
       <created>1387129722093</created>
       <updated>1387129722093</updated>
     </task>
-    <option name="localTasksCounter" value="54" />
+    <task id="LOCAL-00054" summary="#92 use the right option parser (really)&#10;">
+      <created>1387130450202</created>
+      <updated>1387130450202</updated>
+    </task>
+    <option name="localTasksCounter" value="55" />
     <servers />
   </component>
   <component name="ToolWindowManager">
     <frame x="-2373" y="2" width="1343" height="1290" extended-state="0" />
-    <editor active="true" />
+    <editor active="false" />
     <layout>
       <window_info id="Palette&#9;" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
       <window_info id="Changes" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
@@ -1620,14 +1644,14 @@
       <window_info id="Event Log" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="10" side_tool="true" content_ui="tabs" />
       <window_info id="Favorites" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="2" side_tool="true" content_ui="tabs" />
       <window_info id="Version Control" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.26908752" sideWeight="0.5" order="8" side_tool="false" content_ui="tabs" />
-      <window_info id="Messages" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.32015502" sideWeight="0.5" order="9" side_tool="false" content_ui="tabs" />
+      <window_info id="Messages" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.3195266" sideWeight="0.5" order="9" side_tool="false" content_ui="tabs" />
       <window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="6" side_tool="false" content_ui="tabs" />
       <window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
       <window_info id="Maven Projects" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.23625255" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
       <window_info id="Commander" active="false" anchor="right" auto_hide="false" internal_type="SLIDING" type="SLIDING" visible="false" weight="0.4" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
       <window_info id="Application Servers" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
       <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" weight="0.33986434" sideWeight="0.67634857" order="0" side_tool="false" content_ui="combo" />
-      <window_info id="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" weight="0.35164836" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
+      <window_info id="Run" active="true" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" weight="0.35164836" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
       <window_info id="Cvs" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.25" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
       <window_info id="JetGradle" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
       <window_info id="Message" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" weight="0.33" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
@@ -1648,7 +1672,6 @@
     <option name="myTodoPanelSettings">
       <TodoPanelSettings />
     </option>
-    <MESSAGE value="#78 add to application context file so by default haruhi will run the matching version of bakemono" />
     <MESSAGE value="#78 use the right propert name to unbreak the build" />
     <MESSAGE value="#70 initial work on FetchTriplesWithMatchingObjectsTool and the infrastructure that supports it." />
     <MESSAGE value="#70 mapper and reducer pass tests" />
@@ -1673,7 +1696,8 @@
     <MESSAGE value="#92 add ExtractIsAOptions and start work on ExtractIsATool,  but ExtractIsATool is incomplete&#10;" />
     <MESSAGE value="#92 if we're lucky, ExtractIsATool might work&#10;" />
     <MESSAGE value="#92 use the right option parser" />
-    <option name="LAST_COMMIT_MESSAGE" value="#92 use the right option parser" />
+    <MESSAGE value="#92 use the right option parser (really)&#10;" />
+    <option name="LAST_COMMIT_MESSAGE" value="#92 use the right option parser (really)&#10;" />
   </component>
   <component name="XDebuggerManager">
     <breakpoint-manager />
@@ -1683,18 +1707,6 @@
     <option name="FILTER_TARGETS" value="false" />
   </component>
   <component name="editorHistoryManager">
-    <entry file="file://$PROJECT_DIR$/haruhi/src/main/resources/log4j.properties">
-      <provider selected="true" editor-type-id="text-editor">
-        <state line="6" column="40" selection-start="271" selection-end="271" vertical-scroll-proportion="0.0" vertical-offset="102" max-vertical-offset="204" />
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/joins/SetDifferenceReducerTest.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state line="13" column="13" selection-start="316" selection-end="316" vertical-scroll-proportion="0.0" vertical-offset="221" max-vertical-offset="1326">
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/joins/SetDifferenceReducer.java">
       <provider selected="true" editor-type-id="text-editor">
         <state line="36" column="1" selection-start="1171" selection-end="1171" vertical-scroll-proportion="0.0" vertical-offset="612" max-vertical-offset="731">
@@ -1966,64 +1978,78 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityIsAReducerTest.java">
+    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/diffFacts/DiffFactsOptions.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="17" column="29" selection-start="476" selection-end="476" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="986">
-          <folding>
-            <element signature="imports" expanded="false" />
-          </folding>
+        <state line="14" column="42" selection-start="459" selection-end="459" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="714">
+          <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java">
+    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/ExtractIsAOptions.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="13" column="14" selection-start="544" selection-end="544" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="527">
+        <state line="24" column="63" selection-start="768" selection-end="768" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="1207">
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/diffFacts/DiffFactsOptions.java">
+    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityMatchesRuleReducer.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="14" column="42" selection-start="459" selection-end="459" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="714">
+        <state line="12" column="34" selection-start="506" selection-end="506" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="425">
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/joins/SetDifferenceTool.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state line="31" column="45" selection-start="1022" selection-end="1022" vertical-scroll-proportion="0.0" vertical-offset="255" max-vertical-offset="1819">
           <folding />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/diffFacts/DiffFactsTool.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="77" column="0" selection-start="2994" selection-end="3128" vertical-scroll-proportion="0.74333924" vertical-offset="81" max-vertical-offset="1207">
+        <state line="69" column="78" selection-start="2744" selection-end="2744" vertical-scroll-proportion="0.6225577" vertical-offset="81" max-vertical-offset="1207">
           <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/ExtractIsAOptions.java">
+    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/ExtractIsATool.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="24" column="63" selection-start="768" selection-end="768" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="1207">
+        <state line="48" column="83" selection-start="1795" selection-end="1795" vertical-scroll-proportion="0.0" vertical-offset="436" max-vertical-offset="1564">
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityMatchesRuleReducer.java">
+    <entry file="jar://$MAVEN_REPOSITORY$/com/google/guava/guava/15.0/guava-15.0.jar!/com/google/common/cache/LocalCache.class">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="12" column="34" selection-start="506" selection-end="506" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="425">
+        <state line="1136" column="41" selection-start="58734" selection-end="58734" vertical-scroll-proportion="-57.88" vertical-offset="17848" max-vertical-offset="19601">
           <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/joins/SetDifferenceTool.java">
+    <entry file="file://$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityIsAReducerTest.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="31" column="45" selection-start="1022" selection-end="1022" vertical-scroll-proportion="0.0" vertical-offset="255" max-vertical-offset="1819">
+        <state line="12" column="0" selection-start="311" selection-end="347" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="1156">
           <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/ExtractIsATool.java">
+    <entry file="file://$PROJECT_DIR$/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state line="22" column="18" selection-start="892" selection-end="892" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="476">
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityCentricMapperTest.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="41" column="62" selection-start="1428" selection-end="1428" vertical-scroll-proportion="0.48055556" vertical-offset="283" max-vertical-offset="1564">
+        <state line="26" column="64" selection-start="833" selection-end="833" vertical-scroll-proportion="0.61388886" vertical-offset="0" max-vertical-offset="720">
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
diff --git a/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java b/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java
index e726516..96c818e 100644
--- a/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java
+++ b/bakemono/src/main/java/com/ontology2/bakemono/entityCentric/EntityCentricMapper.java
@@ -3,6 +3,7 @@
 import com.ontology2.bakemono.primitiveTriples.PrimitiveTriple;
 import com.ontology2.bakemono.primitiveTriples.PrimitiveTripleCodec;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.io.LongWritable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapreduce.Mapper;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -10,16 +11,12 @@
 
 import java.io.IOException;
 
-abstract public class EntityCentricMapper extends Mapper<Text,Text,Text,Text> {
-    @Autowired
-    ApplicationContext applicationContext;
-    private Configuration conf;
+public class EntityCentricMapper extends Mapper<LongWritable,Text,Text,Text> {
     static final PrimitiveTripleCodec codec=new PrimitiveTripleCodec();
+
     @Override
-    protected void map(Text key, Text value, Context context) throws IOException, InterruptedException {
+    protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
         PrimitiveTriple t=codec.decode(value.toString());
         context.write(new Text(t.getSubject()),value);
     }
-
-
 }
diff --git a/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityCentricMapperTest.java b/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityCentricMapperTest.java
new file mode 100644
index 0000000..7ad72b1
--- /dev/null
+++ b/bakemono/src/test/java/com/ontology2/bakemono/entityCentric/EntityCentricMapperTest.java
@@ -0,0 +1,29 @@
+package com.ontology2.bakemono.entityCentric;
+
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.Mapper;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.IOException;
+
+import static org.mockito.Mockito.*;
+
+public class EntityCentricMapperTest {
+    Mapper.Context context;
+    EntityCentricMapper mapper;
+
+    @Before
+    public void setup() {
+        mapper=new EntityCentricMapper();
+        context=mock(Mapper.Context.class);
+    }
+
+    @Test
+    public void extractSubjectAsKey() throws IOException, InterruptedException {
+        final Text value = new Text("<http://example.com/A> <http://example.com/B> <http://example.com/C>");
+        mapper.map(new LongWritable(1), value,context);
+        verify(context).write(new Text("<http://example.com/A>"),value);
+    }
+}