require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/common', __FILE__)

describe "Process.kill" do
  before :each do
    @sp = ProcessSpecs::Signalizer.new
  end

  after :each do
    @sp.cleanup
  end

  it "raises an ArgumentError for unknown signals" do
    lambda { Process.kill("FOO", @sp.pid) }.should raise_error(ArgumentError)
  end

  it "raises an ArgumentError if passed a lowercase signal name" do
    lambda { Process.kill("term", @sp.pid) }.should raise_error(ArgumentError)
  end

  it "raises an ArgumentError if signal is not a Fixnum or String" do
    signal = mock("process kill signal")
    signal.should_not_receive(:to_int)

    lambda { Process.kill(signal, @sp.pid) }.should raise_error(ArgumentError)
  end

  it "raises Errno::ESRCH if the process does not exist" do
    Process.kill("SIGTERM", @sp.pid)
    @sp.result.should == "signaled"
    lambda { Process.kill("SIGTERM", @sp.pid) }.should raise_error(Errno::ESRCH)
  end

  it "accepts a Symbol as a signal name" do
    Process.kill(:SIGTERM, @sp.pid)
    @sp.result.should == "signaled"
  end

  it "accepts a String as signal name" do
    Process.kill("SIGTERM", @sp.pid)
    @sp.result.should == "signaled"
  end

  it "accepts a signal name without the 'SIG' prefix" do
    Process.kill("TERM", @sp.pid)
    @sp.result.should == "signaled"
  end

  it "accepts a signal name with the 'SIG' prefix" do
    Process.kill("SIGTERM", @sp.pid)
    @sp.result.should == "signaled"
  end

  it "acceps an Integer as a signal value" do
    Process.kill(15, @sp.pid)
    @sp.result.should == "signaled"
  end

  it "calls #to_int to coerce the pid to an Integer" do
    Process.kill("SIGTERM", mock_int(@sp.pid))
    @sp.result.should == "signaled"
  end
end

as_user do
  describe "Process.kill" do
    it "raises an Errno::EPERM if permission is denied" do
      lambda { Process.kill("SIGKILL", 1) }.should raise_error(Errno::EPERM)
    end
  end
end

describe "Process.kill" do
  before :each do
    @sp1 = ProcessSpecs::Signalizer.new
    @sp2 = ProcessSpecs::Signalizer.new
  end

  after :each do
    @sp1.cleanup
    @sp2.cleanup
  end

  it "signals multiple processes" do
    Process.kill("SIGTERM", @sp1.pid, @sp2.pid)
    @sp1.result.should == "signaled"
    @sp2.result.should == "signaled"
  end

  it "returns the number of processes signaled" do
    Process.kill("SIGTERM", @sp1.pid, @sp2.pid).should == 2
  end
end

describe "Process.kill" do
  before :each do
    @sp = ProcessSpecs::Signalizer.new "self", RUBY_EXE
  end

  after :each do
    @sp.cleanup
  end

  it "signals the process group if the PID is zero" do
    @sp.result.should == "signaled"
  end
end

describe "Process.kill" do
  before :each do
    @sp = ProcessSpecs::Signalizer.new "group_numeric", RUBY_EXE
  end

  after :each do
    @sp.cleanup
  end

  it "signals the process group if the signal number is negative" do
    @sp.result.should == "signaled"
  end
end

describe "Process.kill" do
  before :each do
    @sp = ProcessSpecs::Signalizer.new "group_short_string", RUBY_EXE
  end

  after :each do
    @sp.cleanup
  end

  it "signals the process group if the short signal name starts with a minus sign" do
    @sp.result.should == "signaled"
  end
end

describe "Process.kill" do
  before :each do
    @sp = ProcessSpecs::Signalizer.new "group_full_string", RUBY_EXE
  end

  after :each do
    @sp.cleanup
  end

  it "signals the process group if the full signal name starts with a minus sign" do
    @sp.result.should == "signaled"
  end
end
