Add a simple test: computing a number in the Sylvester sequence

https://www.gnu.org/software/gawk/manual/html_node/Arbitrary-Precision-Integers.html#Arbitrary-Precision-Integers

tests/tests.yml

@@ -0,0 +1,46 @@
+- hosts: all
+  vars:
+    - ansible_python_interpreter: /usr/bin/python3
+    - artifacts: ./artifacts
+  tags:
+    - classic
+    - container
+    - atomic
+  tasks:
+    - name: create artifacts
+      file:
+        path: "{{ artifacts }}"
+        state: directory
+      delegate_to: localhost
+
+    - name: do it all
+      block:
+        - name: calculate Silvester number
+          command: |
+            gawk -M 'BEGIN {
+            s = 2
+            for (i = 1; i <= 7; i++)
+            s = s * (s - 1) + 1
+            print s
+            }'
+          register: silvester
+
+        - name: verify Silvester number
+          fail:
+          when: silvester.stdout != '113423713055421844361000443'
+
+      always:
+        - name: write log
+          copy:
+            content: |
+              stderr:
+              {{ silvester.stderr }}
+              stdout:
+              {{ silvester.stdout }}
+            dest: "{{ artifacts }}/test.log"
+          delegate_to: localhost
+
+#        fetch:
+#          dest: "{{ artifacts }}/"
+#          src: "/tmp/test.log"
+#          flat: yes