add AlreadyInEdge test case
diff --git a/genomix/genomix-hadoop/data/webmap/PathMerge_TestSet/AlreadyInEdgeList/reads b/genomix/genomix-hadoop/data/webmap/PathMerge_TestSet/AlreadyInEdgeList/reads
new file mode 100644
index 0000000..aee56c7
--- /dev/null
+++ b/genomix/genomix-hadoop/data/webmap/PathMerge_TestSet/AlreadyInEdgeList/reads
@@ -0,0 +1,2 @@
+1 CAAAT
+2 CAAT
diff --git a/genomix/genomix-pregelix/data/TestSet/PathMerge/AlreadyInEdgeList/bin/part-00000 b/genomix/genomix-pregelix/data/TestSet/PathMerge/AlreadyInEdgeList/bin/part-00000
new file mode 100755
index 0000000..e42fe9d
--- /dev/null
+++ b/genomix/genomix-pregelix/data/TestSet/PathMerge/AlreadyInEdgeList/bin/part-00000
Binary files differ
diff --git a/genomix/genomix-pregelix/data/TestSet/PathMerge/AlreadyInEdgeList/data b/genomix/genomix-pregelix/data/TestSet/PathMerge/AlreadyInEdgeList/data
new file mode 100644
index 0000000..aa2fcb0
--- /dev/null
+++ b/genomix/genomix-pregelix/data/TestSet/PathMerge/AlreadyInEdgeList/data
@@ -0,0 +1,3 @@
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diff --git a/genomix/genomix-pregelix/data/TestSet/PathMerge/AlreadyInEdgeList/graphviz/result.ps b/genomix/genomix-pregelix/data/TestSet/PathMerge/AlreadyInEdgeList/graphviz/result.ps
new file mode 100644
index 0000000..8342fc1
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+++ b/genomix/genomix-pregelix/data/TestSet/PathMerge/AlreadyInEdgeList/graphviz/result.ps
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