Test is a defined variable is a string.

tasks/assert.yml

@@ -4,43 +4,50 @@
   assert:
     that:
       - ca_passphrase is defined
+      - ca_passphrase is string
     quiet: yes
 
 - name: test if ca_common_name is set correctly
   assert:
     that:
       - ca_common_name is defined
+      - ca_common_name is string
     quiet: yes
 
 - name: test if ca_country_name is set correctly
   assert:
     that:
       - ca_country_name is defined
+      - ca_country_name is string
       - ca_country_name | length <= 2
     quiet: yes
 
 - name: test if ca_email_address is set correctly
   assert:
     that:
       - ca_email_address is defined
+      - ca_email_address is string
     quiet: yes
 
 - name: test if ca_organization_name is set correctly
   assert:
     that:
       - ca_organization_name is defined
+      - ca_organization_name is string
     quiet: yes
 
 - name: test if ca_organizational_unit_name is set correctly
   assert:
     that:
       - ca_organizational_unit_name is defined
+      - ca_organizational_unit_name is string
     quiet: yes
 
 - name: test if ca_state_or_province_name is set correctly
   assert:
     that:
       - ca_state_or_province_name is defined
+      - ca_state_or_province_name is string
     quiet: yes
 
 - name: test if ca_requests is set correctly
@@ -55,6 +62,7 @@
   assert:
     that:
       - item is defined
+      - item is string
     quiet: yes
   loop: "{{ ca_requests }}"
   when:
@@ -65,40 +73,47 @@
   assert:
     that:
       - ca_publication_location is defined
+      - ca_publication_location is string
     quiet: yes
 
 - name: test if ca_openssl_path is set correctly
   assert:
     that:
       - ca_openssl_path is defined
+      - ca_openssl_path is string
     quiet: yes
 
 - name: test if ca_private_path is set correctly
   assert:
     that:
       - ca_private_path is defined
+      - ca_private_path is string
     quiet: yes
 
 - name: test if ca_certs_path is set correctly
   assert:
     that:
       - ca_certs_path is defined
+      - ca_certs_path is string
     quiet: yes
 
 - name: test if ca_privatekey_path is set correctly
   assert:
     that:
       - ca_privatekey_path is defined
+      - ca_privatekey_path is string
     quiet: yes
 
 - name: test if ca_csr_path is set correctly
   assert:
     that:
       - ca_csr_path is defined
+      - ca_csr_path is string
     quiet: yes
 
 - name: test if ca_certificate_path is set correctly
   assert:
     that:
       - ca_certificate_path is defined
+      - ca_certificate_path is string
     quiet: yes