Add code_file example tool from Bjoern.

test/functional/tools/code_file.py

@@ -0,0 +1,14 @@
+
+
+from galaxy.tools.parameters import DataToolParameter
+
+
+
+def validate_input( trans, error_map, param_values, page_param_map ):
+    """
+        Validates the user input, before execution.
+    """
+    first = param_values['name1']
+    second = param_values['name2']
+    if first == second:
+        error_map['name1'] = "The value names should be different."

test/functional/tools/code_file.xml

@@ -0,0 +1,15 @@
+<tool id="code_file" name="code_file" version="1.0.0">
+  <description>code_file</description>
+  <code file="code_file.py" />
+  <command>cat $input1 > $output</command>
+  <inputs>
+    <param name="input1" type="data" label="Concatenate Dataset" />
+    <param name="name1" type="text" value="FactorName" label="value one should be different than value two" />
+    <param name="name2" type="text" value="FactorName" label="value one should be different than value two" />
+  </inputs>
+  <outputs>
+    <data format="txt" name="output" />
+  </outputs>
+  <tests>
+  </tests>
+</tool>

test/functional/tools/samples_tool_conf.xml

@@ -3,6 +3,7 @@
   <tool file="upload.xml"/>
   <tool file="simple_constructs.xml" />
   <tool file="composite.xml" />
+  <tool file="code_file.xml" />
   <tool file="disambiguate_cond.xml" />
   <tool file="multi_repeats.xml"/>
   <tool file="multi_page.xml"/>