Install a specific version and test that.

README.md

@@ -19,6 +19,7 @@ This example is taken from [`molecule/default/converge.yml`](https://github.com/
 
   roles:
     - role: robertdebock.java
+      java_version: 8
 ```
 
 The machine needs to be prepared. In CI this is done using [`molecule/default/prepare.yml`](https://github.com/robertdebock/ansible-role-java/blob/master/molecule/default/prepare.yml):

molecule/default/converge.yml

@@ -6,3 +6,4 @@
 
   roles:
     - role: ansible-role-java
+      java_version: 8

molecule/default/verify.yml

@@ -5,7 +5,18 @@
   gather_facts: no
 
   tasks:
-    - name: check if java can be started
+    - name: Check if java can be started
       ansible.builtin.command:
         cmd: java -version
       changed_when: no
+      register: output
+
+    - name: Show output
+      ansible.builtin.debug:
+        msg: "{{ output }}"
+
+    - name: Check if version 8 was found.
+      ansible.builtin.assert:
+        that:
+          - output.stderr is search('openjdk version "1.8.')
+        quiet: yes