[add] added query string support

spec/support/request_spec_shared.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+RSpec.shared_examples 'POST /admin/client 201' do
+  it 'creates client that can read/write and returns 201' do
+    expect(json_response).not_to be_empty
+    expect(json_response['name']).to eq valid_client[:name]
+    expect(json_response['api_key'].length).to eq 82
+    expect(response).to have_http_status(201)
+    api_key = json_response['api_key']
+    # check if request was parsed properly
+    get "/admin/clients/#{valid_client[:name]}", headers: api_key_header(admin_client)
+    expect(json_response).not_to be_empty
+    expect(json_response['name']).to eq valid_client[:name]
+    expect(json_response['description']).to eq valid_client[:description]
+    expect(json_response['permission']).to eq valid_client[:permission]
+    expect(json_response['public_ip']).to eq valid_client[:public_ip]
+    expect(response).to have_http_status(200)
+    # test the new client write
+    put '/client', headers: api_key_header(nil, api_key)
+    expect(json_response).not_to be_empty
+    expect(response).to have_http_status(200)
+    ipv4 = json_response['ipv4']
+    # test the new client read
+    get "/clients/#{valid_client[:name]}", headers: api_key_header(nil, api_key)
+    expect(json_response).not_to be_empty
+    expect(response).to have_http_status(200)
+    expect(json_response['ipv4']).to eq ipv4
+  end
+end