add more tests

add first version to start crons
adjust code to return now if cron is overdue

lib/travis/api/v3/models/cron.rb

@@ -3,22 +3,38 @@ module Travis::API::V3
 
     belongs_to :branch
 
+    def self.start_all
+      self.all.each do |cron|
+        cron.start if cron.next_build_time <= Time.now
+      end
+    end
+
+    def start
+      raise ServerError, 'repository does not have a github_id'.freeze unless branch.repository.github_id
+
+      payload = {
+        repository: { id: branch.repository.github_id, owner_name: branch.repository.owner_name, name: branch.repository.name },
+        user:       { id: user.id },
+        message:    '',
+        branch:     branch,
+        config:     {}
+      }
+
+      token = "TODO: Figure out where to get this (branch.repository.owner ?)"
+      perform_async(:build_request, type: 'cron'.freeze, credentials: { token: token }, payload: JSON.dump(payload))
+      payload
+    end
+
     def next_build_time
 
-      if disable_by_build
+      if (disable_by_build) && (last_non_cron_build_date > last_planned_time)
-        if last_non_cron_build_date > last_planned_time
         return after_next_planned_time
-        else
+      elsif last_cron_build_date >= last_planned_time
-          return next_planned_time
-        end
-      else
-        if last_cron_build_date >= last_planned_time
         return next_planned_time
       else
         return Time.now
       end
     end
-    end
 
     def next_planned_time
       now = DateTime.now

spec/v3/models/cron_spec.rb

@@ -155,5 +155,77 @@ describe Travis::API::V3::Models::Cron do
 
   end
 
+  describe "build starts now if next build time is in the past" do
+
+    before do
+      # nothing, this time
+      # time freeze is performed in examples
+    end
+
+    after do
+      Timecop.return
+    end
+
+    it "for daily builds with disable_by_build true" do
+      Timecop.travel(DateTime.new(2015, 12, 31, 16))
+      cron = Travis::API::V3::Models::Cron.create(branch_id: branch.id, interval: 'daily', disable_by_build: true)
+      build = Travis::API::V3::Models::Build.create(:repository_id => repo.id, :branch_name => branch.name, :event_type => 'cron')
+      Timecop.freeze(DateTime.new(2016, 1, 1, 19))
+      expect(cron.next_build_time).to be == DateTime.now
+      build.destroy
+      cron.destroy
+    end
+
+    it "for daily builds with disable_by_build false" do
+      Timecop.travel(DateTime.new(2015, 12, 31, 16))
+      cron = Travis::API::V3::Models::Cron.create(branch_id: branch.id, interval: 'daily', disable_by_build: false)
+      build = Travis::API::V3::Models::Build.create(:repository_id => repo.id, :branch_name => branch.name, :event_type => 'cron')
+      Timecop.freeze(DateTime.new(2016, 1, 1, 19))
+      expect(cron.next_build_time).to be == DateTime.now
+      build.destroy
+      cron.destroy
+    end
+
+    it "for weekly builds with disable_by_build true" do
+      Timecop.travel(DateTime.new(2015, 12, 31, 16))
+      cron = Travis::API::V3::Models::Cron.create(branch_id: branch.id, interval: 'weekly', disable_by_build: true)
+      build = Travis::API::V3::Models::Build.create(:repository_id => repo.id, :branch_name => branch.name, :event_type => 'cron')
+      Timecop.freeze(DateTime.new(2016, 1, 7, 19))
+      expect(cron.next_build_time).to be == DateTime.now
+      build.destroy
+      cron.destroy
+    end
+
+    it "for weekly builds with disable_by_build false" do
+      Timecop.travel(DateTime.new(2015, 12, 31, 16))
+      cron = Travis::API::V3::Models::Cron.create(branch_id: branch.id, interval: 'weekly', disable_by_build: false)
+      build = Travis::API::V3::Models::Build.create(:repository_id => repo.id, :branch_name => branch.name, :event_type => 'cron')
+      Timecop.freeze(DateTime.new(2016, 1, 7, 19))
+      expect(cron.next_build_time).to be == DateTime.now
+      build.destroy
+      cron.destroy
+    end
+
+    it "for monthly builds with disable_by_build true" do
+      Timecop.travel(DateTime.new(2015, 12, 31, 16))
+      cron = Travis::API::V3::Models::Cron.create(branch_id: branch.id, interval: 'monthly', disable_by_build: true)
+      build = Travis::API::V3::Models::Build.create(:repository_id => repo.id, :branch_name => branch.name, :event_type => 'cron')
+      Timecop.freeze(DateTime.new(2016, 1, 31, 19))
+      expect(cron.next_build_time).to be == DateTime.now
+      build.destroy
+      cron.destroy
+    end
+
+    it "for monthly builds with disable_by_build false" do
+      Timecop.travel(DateTime.new(2015, 12, 31, 16))
+      cron = Travis::API::V3::Models::Cron.create(branch_id: branch.id, interval: 'monthly', disable_by_build: false)
+      build = Travis::API::V3::Models::Build.create(:repository_id => repo.id, :branch_name => branch.name, :event_type => 'cron')
+      Timecop.freeze(DateTime.new(2016, 1, 31, 19))
+      expect(cron.next_build_time).to be == DateTime.now
+      build.destroy
+      cron.destroy
+    end
+
+  end
 
 end