Add test case when specified service account does not exist

tests/integration/targets/gcp_iam_service_account_key/tasks/service-account-keys.yml

@@ -100,3 +100,41 @@
     auth_kind: "{{ gcp_cred_kind }}"
     service_account_file: "{{ gcp_cred_file | default(omit) }}"
     state: absent
+
+- name: Delete a service account key file
+  connection: local
+  ansible.builtin.file:
+    path: "{{ gcp_cred_file }}-temporary-service-account-key"
+    state: absent
+
+#----------------------------------------------------------
+
+- name: Create a service account key with icorrect service account name
+  google.cloud.gcp_iam_service_account_key:
+    service_account:
+      name: service-{{ resource_name.split("-")[-1] }}
+    private_key_type: TYPE_GOOGLE_CREDENTIALS_FILE
+    path: "{{ gcp_cred_file }}-temporary-service-account-key"
+
+    project: "{{ gcp_project }}"
+    auth_kind: "{{ gcp_cred_kind }}"
+    service_account_file: "{{ gcp_cred_file | default(omit) }}"
+    state: present
+  register: result
+  failed_when: result.failed == false
+
+- name: Assert changed is true
+  ansible.builtin.assert:
+    that:
+      - result.msg is match('No such Service Account')
+
+- name: Verify that service_account_key was not created
+  connection: local
+  ansible.builtin.stat:
+    path: "{{ gcp_cred_file }}-temporary-service-account-key"
+  register: key_file
+
+- name: Verify that command succeeded
+  ansible.builtin.assert:
+    that:
+      - key_file.stat.exists == false