Add test tool demontrating filtering selections based on dbkey.

test/functional/tool-data/fasta_indexes.loc

@@ -0,0 +1,2 @@
+hg19	hg19	hg19	hg19
+hg18	hg18	hg18	hg18

test/functional/tool-data/sample_tool_data_tables.xml

@@ -7,4 +7,8 @@
     <columns>value, path</columns>
     <file path="${__HERE__}/testbeta.loc" />
   </table>
+  <table name="test_fasta_indexes" comment_char="#">
+    <columns>value, dbkey, name, path</columns>
+    <file path="${__HERE__}/fasta_indexes.loc" />
+  </table>
 </tables>

test/functional/tools/dbkey_filter_input.xml

@@ -0,0 +1,39 @@
+<tool id="dbkey_filter_input" name="dbkey_filter_input" version="0.1.0">
+    <description>Filter (single) input on a dbkey</description>
+    <command>
+        cat $inputs > $output
+    </command>
+    <inputs>
+        <param format="txt" name="inputs" type="data" label="Inputs" help="" />
+        <param name="index" type="select" label="Using reference genome">
+          <options from_data_table="test_fasta_indexes">
+            <filter type="data_meta" ref="inputs" key="dbkey" column="1" />
+            <validator type="no_options" message="No reference genome is available for the build associated with the selected input dataset" />
+          </options>
+        </param>
+    </inputs>
+
+    <outputs>
+        <data format="txt" name="output" />
+    </outputs>
+
+    <tests>
+        <!-- can choose a dbkey if it matches input -->
+        <test>
+            <param name="inputs" value="simple_line.txt" dbkey="hg19" />
+            <param name="index" value="hg19" />
+            <output name="output" file="simple_line.txt"/>
+        </test>
+        <!-- cannot pick index otherwise -->
+        <!-- Does this make sense - if no dbkey is defined there is no option
+             available? -->
+        <test expect_failure="true">
+            <param name="inputs" value="simple_line.txt" />
+            <param name="index" value="hg18" />
+            <output name="output" file="simple_line.txt"/>
+        </test>
+    </tests>
+
+    <help>
+    </help>
+</tool>

test/functional/tools/samples_tool_conf.xml

@@ -16,6 +16,7 @@
   <tool file="multi_output.xml" />
   <tool file="multi_output_configured.xml" />
   <tool file="multi_output_assign_primary.xml" />
+  <tool file="dbkey_filter_input.xml" />
   <tool file="composite_output.xml" />
   <tool file="metadata.xml" />
   <tool file="metadata_bam.xml" />