Add workflow tests for multiple="true" workflow parameter

lib/galaxy_test/workflow/multiple_integer_into_data_column.gxwf-tests.yml

@@ -0,0 +1,15 @@
+- doc: |
+    Test to verify text parameter can be connected to data column param
+  job:
+    input:
+      type: File
+      value: 2.tabular
+      file_type: tabular
+    column:
+      value: [1, 2]
+      type: raw
+  outputs:
+    output:
+      asserts:
+        - that: has_text
+          text: "col 1,2"

lib/galaxy_test/workflow/multiple_integer_into_data_column.gxwf.yml

@@ -0,0 +1,16 @@
+class: GalaxyWorkflow
+inputs:
+  input:
+    type: data
+  column:
+    type: [integer]
+outputs:
+  output:
+    outputSource: column_param_list/output2
+steps:
+  column_param_list:
+    tool_id: column_param_list
+    in:
+      input1: input
+      col: column
+      col_names: column

lib/galaxy_test/workflow/multiple_text.gxwf-tests.yml

@@ -0,0 +1,14 @@
+- doc: |
+    Test that workflows can run with multiple text parameter fed into a multi select parameter.
+  job:
+    input:
+      value:
+      - --ex1
+      - ex2
+      - --ex3
+      type: raw
+  outputs:
+    output:
+      asserts:
+        - that: has_line
+          line: '--ex1,ex2,--ex3'

lib/galaxy_test/workflow/multiple_text.gxwf.yml

@@ -0,0 +1,15 @@
+class: GalaxyWorkflow
+inputs:
+  input:
+    type: [string]
+outputs:
+  output:
+    outputSource: multi_select/output
+steps:
+  multi_select:
+    tool_id: multi_select
+    tool_version: "0.1"
+    in:
+      select_ex: input
+    tool_state:
+      select_optional: null