Change an example in section 13 not to use side-effect

_episodes/13-expressions.md

@@ -49,10 +49,36 @@ We can then run `expression.cwl`:
 
 ~~~
 $ cwl-runner expression.cwl empty.yml
-[job 140000594593168] /home/example$ echo -A 2 -B baz -C 10 9 8 7 6 5 4 3 2 1
--A 2 -B baz -C 10 9 8 7 6 5 4 3 2 1
+[job expression.cwl] /home/example$ echo \
+    -A \
+    2 \
+    -B \
+    baz \
+    -C \
+    10 \
+    9 \
+    8 \
+    7 \
+    6 \
+    5 \
+    4 \
+    3 \
+    2 \
+    1 > /home/example/output.txt
+[job expression.cwl] completed success
+{
+    "example_out": {
+        "location": "file:///home/example/output.txt",
+        "basename": "output.txt",
+        "class": "File",
+        "checksum": "sha1$a739a6ff72d660d32111265e508ed2fc91f01a7c",
+        "size": 36,
+        "path": "/home/example/output.txt"
+    }
+}
 Final process status is success
-{}
+$ cat output.txt
+-A 2 -B baz -C 10 9 8 7 6 5 4 3 2 1
 ~~~
 {: .output}
 

_includes/cwl/13-expressions/expression.cwl

@@ -8,7 +8,10 @@ requirements:
   - class: InlineJavascriptRequirement
 
 inputs: []
-outputs: []
+outputs:
+  example_out:
+    type: stdout
+stdout: output.txt
 arguments:
   - prefix: -A
     valueFrom: $(1+1)

_includes/cwl/conformance-test.yml

@@ -139,7 +139,18 @@
       basename: output.txt
       location: Any
 
-# Section 13 depends on side-effects
+# Section 13
+- doc: Test for section 13
+  job: 13-expressions/empty.yml
+  tool: 13-expressions/expression.cwl
+  output:
+    example_out:
+      class: File
+      checksum: sha1$a739a6ff72d660d32111265e508ed2fc91f01a7c
+      basename: output.txt
+      location: Any
+      size: 36
+
 # Section 14 depends on side-effects
 
 # Section 15