Fix builds scheduler when first build is allowed to fail

Before this fix when there was only one relevant, previous build and it
failed, but was allowed to fail, entire build had been marked as
skipped.

Closes #3192

lib/ci/status.rb

 module Ci
   class Status
     def self.get_status(statuses)
-      statuses.reject! { |status| status.try(&:allow_failure?) }
-
       if statuses.none?
         'skipped'
-      elsif statuses.all?(&:success?)
+      elsif statuses.all? { |status| status.success? || status.ignored? }
         'success'
       elsif statuses.all?(&:pending?)
         'pending'

spec/factories/ci/builds.rb

@@ -28,6 +28,18 @@ FactoryGirl.define do
       status 'canceled'
     end
 
+    trait :running do
+      status 'running'
+    end
+
+    trait :pending do
+      status 'pending'
+    end
+
+    trait :allowed_to_fail do
+      allow_failure true
+    end
+
     after(:build) do |build, evaluator|
       build.project = build.commit.project
     end

spec/lib/ci/status_spec.rb

@@ -13,5 +13,25 @@ describe Ci::Status do
       let(:builds) { [create(:ci_build, :success), create(:ci_build, :failed)] }
       it { is_expected.to eq 'failed' }
     end
+
+    context 'at least one running' do
+      let(:builds) { [create(:ci_build, :success), create(:ci_build, :running)] }
+      it { is_expected.to eq 'running' }
+    end
+
+    context 'at least one pending' do
+      let(:builds) { [create(:ci_build, :success), create(:ci_build, :pending)] }
+      it { is_expected.to eq 'running' }
+    end
+
+    context 'build success and failed but allowed to fail' do
+      let(:builds) { [create(:ci_build, :success), create(:ci_build, :failed, :allowed_to_fail)] }
+      it { is_expected.to eq 'success' }
+    end
+
+    context 'one build failed but allowed to fail' do
+      let(:builds) { [create(:ci_build, :failed, :allowed_to_fail)] }
+      it { is_expected.to eq 'success' }
+    end
   end
 end