tasks_spec.rb

require 'spec_helper'
require 'parallel_tests/tasks'

describe ParallelTests::Tasks do
  describe ".parse_args" do
    it "should return the count" do
      args = {:count => 2}
      expect(ParallelTests::Tasks.parse_args(args)).to eq([2, "", "", ""])
    end

    it "should default to the prefix" do
      args = {:count => "models"}
      expect(ParallelTests::Tasks.parse_args(args)).to eq([nil, "models", "", ""])
    end

    it "should return the count and pattern" do
      args = {:count => 2, :pattern => "models"}
      expect(ParallelTests::Tasks.parse_args(args)).to eq([2, "models", "", ""])
    end

    it "should return the count, pattern, and options" do
      args = {:count => 2, :pattern => "plain", :options => "-p default"}
      expect(ParallelTests::Tasks.parse_args(args)).to eq([2, "plain", "-p default", ""])
    end

    it "should return the count, pattern, and options" do
      args = {:count => 2, :pattern => "plain", :options => "-p default --group-by steps"}
      expect(ParallelTests::Tasks.parse_args(args)).to eq([2, "plain", "-p default --group-by steps", ""])
    end

    it "should return the count, pattern, test options, and pass-through options" do
      args = {:count => 2, :pattern => "plain", :options => "-p default --group-by steps", :pass_through => "--runtime-log /path/to/log"}
      expect(ParallelTests::Tasks.parse_args(args)).to eq([2, "plain", "-p default --group-by steps", "--runtime-log /path/to/log"])
    end
  end

  describe ".rails_env" do
    it "should be test" do
      expect(ParallelTests::Tasks.rails_env).to eq("test")
    end

    it "should disregard whatever was set" do
      ENV["RAILS_ENV"] = "foo"
      expect(ParallelTests::Tasks.rails_env).to eq("test")
    end
  end

  describe ".run_in_parallel" do
    let(:full_path){ File.expand_path("../../../bin/parallel_test", __FILE__) }

    it "has the executable" do
      expect(File.file?(full_path)).to eq(true)
      expect(File.executable?(full_path)).to eq(true) unless Gem.win_platform?
    end

    it "runs command in parallel" do
      expect(ParallelTests::Tasks).to receive(:system).with(/#{full_path} --exec 'echo'$/).and_return true
      ParallelTests::Tasks.run_in_parallel("echo")
    end

    it "runs command with :count option" do
      expect(ParallelTests::Tasks).to receive(:system).with(/#{full_path} --exec 'echo' -n 123$/).and_return true
      ParallelTests::Tasks.run_in_parallel("echo", :count => 123)
    end

    it "runs without -n with blank :count option" do
      expect(ParallelTests::Tasks).to receive(:system).with(/#{full_path} --exec 'echo'$/).and_return true
      ParallelTests::Tasks.run_in_parallel("echo", :count => "")
    end

    it "runs command with :non_parallel option" do
      expect(ParallelTests::Tasks).to receive(:system).with(/#{full_path} --exec 'echo' --non-parallel$/).and_return true
      ParallelTests::Tasks.run_in_parallel("echo", :non_parallel => true)
    end

    it "runs aborts if the command fails" do
      expect(ParallelTests::Tasks).to receive(:system).and_return false
      expect(ParallelTests::Tasks).to receive(:abort).and_return false
      ParallelTests::Tasks.run_in_parallel("echo")
    end
  end

  describe ".suppress_output", unless: Gem.win_platform? do
    def call(command, grep)
      # Explictly run as a parameter to /bin/sh to simulate how
      # the command will be run by parallel_test --exec
      # This also tests shell escaping of single quotes
      result = `/bin/sh -c '#{ParallelTests::Tasks.suppress_output(command, grep)}'`
      [result, $?.success?]
    end

    context "with pipefail supported" do
      before :all do
        if not system("/bin/bash", "-c", "set -o pipefail 2>/dev/null && test 1")
          skip "pipefail is not supported on your system"
        end
      end

      it "should hide offending lines" do
        expect(call("echo 123", "123")).to eq(["", true])
      end

      it "should not hide other lines" do
        expect(call("echo 124", "123")).to eq(["124\n", true])
      end

      it "should fail if command fails and the pattern matches" do
        expect(call("echo 123 && test", "123")).to eq(["", false])
      end

      it "should fail if command fails and the pattern fails" do
        expect(call("echo 124 && test", "123")).to eq(["124\n", false])
      end
    end

    context "without pipefail supported" do
      before do
        expect(ParallelTests::Tasks).to receive(:system).with('/bin/bash', '-c', 'set -o pipefail 2>/dev/null && test 1').and_return false
      end

      it "should not filter and succeed" do
        expect(call("echo 123", "123")).to eq(["123\n", true])
      end

      it "should not filter and fail" do
        expect(call("echo 123 && test", "123")).to eq(["123\n", false])
      end
    end
  end

  describe ".suppress_schema_load_output" do
    before do
      allow(ParallelTests::Tasks).to receive(:suppress_output)
    end

    it 'should call suppress output with command' do
      ParallelTests::Tasks.suppress_schema_load_output('command')
      expect(ParallelTests::Tasks).to have_received(:suppress_output).with('command', "^   ->\\|^-- ")
    end
  end

  describe ".check_for_pending_migrations" do
    after do
      Rake.application.instance_variable_get('@tasks').delete("db:abort_if_pending_migrations")
      Rake.application.instance_variable_get('@tasks').delete("app:db:abort_if_pending_migrations")
    end

    it "should do nothing if pending migrations is no defined" do
      ParallelTests::Tasks.check_for_pending_migrations
    end

    it "should run pending migrations is task is defined" do
      foo = 1
      Rake::Task.define_task("db:abort_if_pending_migrations") do
        foo = 2
      end
      ParallelTests::Tasks.check_for_pending_migrations
      expect(foo).to eq(2)
    end

    it "should run pending migrations is app task is defined" do
      foo = 1
      Rake::Task.define_task("app:db:abort_if_pending_migrations") do
        foo = 2
      end
      ParallelTests::Tasks.check_for_pending_migrations
      expect(foo).to eq(2)
    end

    it "should not execute the task twice" do
      foo = 1
      Rake::Task.define_task("db:abort_if_pending_migrations") do
        foo += 1
      end
      ParallelTests::Tasks.check_for_pending_migrations
      ParallelTests::Tasks.check_for_pending_migrations
      expect(foo).to eq(2)
    end
  end

  describe '.purge_before_load' do
    context 'Rails < 4.2.0' do
      before do
        stub_const('Rails', double(version: '3.2.1'))
      end

      it "should return nil for Rails < 4.2.0" do
        expect(ParallelTests::Tasks.purge_before_load).to eq nil
      end
    end

    context 'Rails > 4.2.0' do
      before do
        stub_const('Rails', double(version: '4.2.8'))
      end

      it "should return db:purge when defined" do
        allow(Rake::Task).to receive(:task_defined?).with('db:purge') { true }

        expect(ParallelTests::Tasks.purge_before_load).to eq 'db:purge'
      end

      it "should return app:db:purge when db:purge is not defined" do
        allow(Rake::Task).to receive(:task_defined?).with('db:purge') { false }

        expect(ParallelTests::Tasks.purge_before_load).to eq 'app:db:purge'
      end
    end
  end
end