#! /usr/bin/env ruby
require 'spec_helper'

describe "the template function" do
  before :all do
    Puppet::Parser::Functions.autoloader.loadall
  end

  let :node     do Puppet::Node.new('localhost') end
  let :compiler do Puppet::Parser::Compiler.new(node) end
  let :scope    do Puppet::Parser::Scope.new(compiler) end

  it "concatenates outputs for multiple templates" do
    tw1 = stub_everything "template_wrapper1"
    tw2 = stub_everything "template_wrapper2"
    Puppet::Parser::TemplateWrapper.stubs(:new).returns(tw1,tw2)
    tw1.stubs(:file=).with("1")
    tw2.stubs(:file=).with("2")
    tw1.stubs(:result).returns("result1")
    tw2.stubs(:result).returns("result2")

    scope.function_template(["1","2"]).should == "result1result2"
  end

  it "raises an error if the template raises an error" do
    tw = stub_everything 'template_wrapper'
    Puppet::Parser::TemplateWrapper.stubs(:new).returns(tw)
    tw.stubs(:result).raises

    expect {
      scope.function_template(["1"])
    }.to raise_error(Puppet::ParseError, /Failed to parse template/)
  end

  context "when accessing scope variables via method calls (deprecated)" do
    it "raises an error when accessing an undefined variable" do
      expect {
        eval_template("template <%= deprecated %>")
      }.to raise_error(Puppet::ParseError, /Could not find value for 'deprecated'/)
    end

    it "looks up the value from the scope" do
      scope["deprecated"] = "deprecated value"
      eval_template("template <%= deprecated %>").should == "template deprecated value"
    end

    it "still has access to Kernel methods" do
      expect { eval_template("<%= binding %>") }.to_not raise_error
    end
  end

  context "when accessing scope variables as instance variables" do
    it "has access to values" do
      scope['scope_var'] = "value"
      eval_template("<%= @scope_var %>").should == "value"
    end

    it "get nil accessing a variable that does not exist" do
      eval_template("<%= @not_defined.nil? %>").should == "true"
    end

    it "get nil accessing a variable that is undef" do
      scope['undef_var'] = :undef
      eval_template("<%= @undef_var.nil? %>").should == "true"
    end
  end

  it "is not interfered with by having a variable named 'string' (#14093)" do
    scope['string'] = "this output should not be seen"
    eval_template("some text that is static").should == "some text that is static"
  end

  it "has access to a variable named 'string' (#14093)" do
    scope['string'] = "the string value"
    eval_template("string was: <%= @string %>").should == "string was: the string value"
  end

  it "does not have direct access to Scope#lookupvar" do
    expect {
      eval_template("<%= lookupvar('myvar') %>")
    }.to raise_error(Puppet::ParseError, /Could not find value for 'lookupvar'/)
  end

  def eval_template(content)
    Puppet::FileSystem.stubs(:read_preserve_line_endings).with("template").returns(content)
    Puppet::Parser::Files.stubs(:find_template).returns("template")
    scope.function_template(['template'])
  end
end