[DoH] Write tests for --header option

tests.yaml

@@ -10,6 +10,7 @@ config:
       - "check: test related to the compliance option --check"
       - "forceIPv4: test using the option -4"
       - "forceIPv6: test using the option -6"
+      - "header: test using --header option"
       - "fail: mark test with a resolver currently failing our tests"
       - "slow: test that need time to run"
 
@@ -354,6 +355,32 @@ tests:
       partstderr: 'IPv4 *or* IPv6'
       stdout: ''
 
+    - exe: './homer.py'
+      name: '[doh][header] Command line option --header (accept)'
+      markers:
+          - 'doh'
+          - 'header'
+      args:
+          - '--debug'
+          - '--header'
+          - 'Accept: application/dns-json'
+          - 'https://doh.bortzmeyer.fr'
+          - 'framagit.org'
+      partstderr: 'accept: application/dns-json'
+
+    - exe: './homer.py'
+      name: '[doh][header] Command line option --header (content-type)'
+      markers:
+          - 'doh'
+          - 'header'
+      args:
+          - '--debug'
+          - '--header'
+          - 'Content-type: text/html'
+          - 'https://doh.bortzmeyer.fr'
+          - 'framagit.org'
+      partstderr: 'content-type: text/html'
+
     - exe: './homer.py'
       name: '[dot] Force IPv4 and IPv6'
       markers: