feat(validation): expand glob patterns in the spec list

tests/inputs/test_inputs.yml

@@ -14,6 +14,41 @@
         loop_var: inf
         label: "{{ inf.name }}"
 
+    - name: Expand a spec pattern
+      validate_inputs:
+        specs:
+          - "{{ playbook_dir }}/fixture_*.yml"
+      vars:
+        fixture:
+          name: web01
+          servers: [10.0.0.1]
+      register: inputs_pattern_result
+
+    - name: Assert the pattern matched the fixture spec
+      ansible.builtin.assert:
+        that:
+          - inputs_pattern_result is succeeded
+        success_msg: "[inputs pattern] OK"
+
+    - name: Refuse a pattern that matches nothing
+      block:
+        - name: Run the validator with a pattern that matches no file
+          validate_inputs:
+            specs:
+              - "{{ playbook_dir }}/nothing_*.yml"
+          register: inputs_nomatch_result
+      rescue:
+        - name: Keep the no-match failure
+          ansible.builtin.set_fact:
+            inputs_nomatch_result: "{{ ansible_failed_result }}"
+
+    - name: Assert the empty pattern was refused
+      ansible.builtin.assert:
+        that:
+          - inputs_nomatch_result.msg is search('no spec file matches')
+        fail_msg: "[inputs no-match] got {{ inputs_nomatch_result.msg | default('') }}"
+        success_msg: "[inputs no-match] OK"
+
     - name: Refuse a variable declared by two specs
       block:
         - name: Run the validator with the fixture spec twice