Add in examples for unit test. Closes #6.

.github/workflows/unit.yml

@@ -0,0 +1,44 @@
+name: unit test
+on: [push, pull_request]
+
+defaults:
+  run:
+    # This is needed for miniconda, see:
+    # https://github.com/marketplace/actions/setup-miniconda#important.
+    shell: bash -l {0}
+
+jobs:
+  miniwdl_check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.9
+    - name: Install miniwdl
+      run: |
+        python -m pip install --upgrade pip
+        pip3 install miniwdl
+        pip3 install pytest-workflow
+    - name: Run unit tests
+      # Use --symlink to limit disk usage.
+      run: >- 
+        pytest --keep-workflow-wd-on-fail 
+        --symlink tests/ 
+    - name: Check miniwdl log in case of failure.
+      if: ${{ failure() }}
+      # Get the last 1000 lines of the miniwdl log to catch the error.
+      run: bash -c 'tail -n 1000 /tmp/pytest_workflow_*/*/log.out'
+    - name: Check job stderr messages in case of failure
+      if: ${{ failure() }}
+      run: >- 
+        bash -c '
+        for file in $(find /tmp -name stderr); 
+        do echo $file; cat $file; done'
+    - name: Check job stdout messages in case of failure
+      if: ${{ failure() }}
+      run: >- 
+        bash -c '
+        for file in $(find /tmp -name stdout); 
+        do echo $file; cat $file; done'

hello.wdl

@@ -5,9 +5,9 @@ task hello {
     String name
   }
 
-  command <<<
+  command {
     echo 'hello ${name}!'
-  >>>
+  }
 
   output {
     File response = stdout()

tests/inputs/hello.inputs.json

@@ -0,0 +1,4 @@
+{
+  "name": "Test"
+}
+

tests/test.hello.yaml

@@ -0,0 +1,5 @@
+- name: hello
+  command: miniwdl run -i tests/inputs/hello.inputs.json -d test-output/ --task hello hello.wdl
+  stdout:                            # Options for testing stdout (optional)
+    contains:                        # List of strings which should be in stdout (optional)
+      - "hello Test!"