Allow to test JIRA service when project does not have repository

app/models/project_services/jira_service.rb

@@ -163,6 +163,21 @@ class JiraService < IssueTrackerService
     add_comment(data, issue_key)
   end
+  # reason why service cannot be tested
+  def disabled_title
+    "Please fill in Password and Username."
+  end
+
+  def can_test?
+    username.present? && password.present?
+  end
+
+  # JIRA does not need test data.
+  # We are requesting the project that belongs to the project key.
+  def test_data(user = nil, project = nil)
+    nil
+  end
+
   def test_settings
     return unless url.present?
     # Test settings by getting the project

app/views/projects/services/_form.html.haml

@@ -12,6 +12,9 @@
       = form.submit 'Save changes', class: 'btn btn-save'
        
       - if @service.valid? && @service.activated?
-        - disabled = @service.can_test? ? '':'disabled'
-        = link_to 'Test settings', test_namespace_project_service_path(@project.namespace, @project, @service), class: "btn #{disabled}", title: @service.disabled_title
+        - unless @service.can_test?
+          - disabled_class = 'disabled'
+          - disabled_title = @service.disabled_title
+
+        = link_to 'Test settings', test_namespace_project_service_path(@project.namespace, @project, @service), class: "btn #{disabled_class}", title: disabled_title
       = link_to "Cancel", namespace_project_services_path(@project.namespace, @project), class: "btn btn-cancel"

changelogs/unreleased/issue_23032.yml

+---
+title: Allow to test JIRA service settings without having a repository
+merge_request: 
+author: 

spec/models/project_services/jira_service_spec.rb

@@ -33,6 +33,41 @@ describe JiraService, models: true do
     end
   end
+  describe '#can_test?' do
+    let(:jira_service) { described_class.new }
+
+    it 'returns false if username is blank' do
+      allow(jira_service).to receive_messages(
+        url: 'http://jira.example.com',
+        username: '',
+        password: '12345678'
+      )
+
+      expect(jira_service.can_test?).to be_falsy
+    end
+
+    it 'returns false if password is blank' do
+      allow(jira_service).to receive_messages(
+        url: 'http://jira.example.com',
+        username: 'tester',
+        password: ''
+      )
+
+      expect(jira_service.can_test?).to be_falsy
+    end
+
+    it 'returns true if password and username are present' do
+      jira_service = described_class.new
+      allow(jira_service).to receive_messages(
+        url: 'http://jira.example.com',
+        username: 'tester',
+        password: '12345678'
+      )
+
+      expect(jira_service.can_test?).to be_truthy
+    end
+  end
+
   describe "Execute" do
     let(:user)    { create(:user) }
     let(:project) { create(:project) }
@@ -46,16 +81,19 @@ describe JiraService, models: true do
         service_hook: true,
         url: 'http://jira.example.com',
         username: 'gitlab_jira_username',
-        password: 'gitlab_jira_password'
+        password: 'gitlab_jira_password',
+        project_key: 'GitLabProject'
       )
       @jira_service.save
-      project_url = 'http://gitlab_jira_username:gitlab_jira_password@jira.example.com/rest/api/2/issue/JIRA-123'
-      @transitions_url = 'http://gitlab_jira_username:gitlab_jira_password@jira.example.com/rest/api/2/issue/JIRA-123/transitions'
-      @comment_url = 'http://gitlab_jira_username:gitlab_jira_password@jira.example.com/rest/api/2/issue/JIRA-123/comment'
-      WebMock.stub_request(:get, project_url)
+      project_issues_url = 'http://gitlab_jira_username:gitlab_jira_password@jira.example.com/rest/api/2/issue/JIRA-123'
+      @project_url       = 'http://gitlab_jira_username:gitlab_jira_password@jira.example.com/rest/api/2/project/GitLabProject'
+      @transitions_url   = 'http://gitlab_jira_username:gitlab_jira_password@jira.example.com/rest/api/2/issue/JIRA-123/transitions'
+      @comment_url       = 'http://gitlab_jira_username:gitlab_jira_password@jira.example.com/rest/api/2/issue/JIRA-123/comment'
+      WebMock.stub_request(:get, @project_url)
+      WebMock.stub_request(:get, project_issues_url)
       WebMock.stub_request(:post, @transitions_url)
       WebMock.stub_request(:post, @comment_url)
     end
@@ -99,6 +137,14 @@ describe JiraService, models: true do
         body: /this-is-a-custom-id/
       ).once
     end
+
+    context "when testing" do
+      it "tries to get jira project" do
+        @jira_service.execute(nil)
+
+        expect(WebMock).to have_requested(:get, @project_url)
+      end
+    end
   end
   describe "Stored password invalidation" do