MODULES-444-Add concat multiple

lib/puppet/parser/functions/concat.rb

@@ -4,31 +4,35 @@
 
 module Puppet::Parser::Functions
   newfunction(:concat, :type => :rvalue, :doc => <<-EOS
-Appends the contents of array 2 onto array 1.
+Appends the contents of multiple arrays into array 1.
 
 *Example:*
 
-    concat(['1','2','3'],['4','5','6'])
+    concat(['1','2','3'],['4','5','6'],['7','8','9'])
 
 Would result in:
 
-  ['1','2','3','4','5','6']
+  ['1','2','3','4','5','6','7','8','9']
     EOS
   ) do |arguments|
 
-    # Check that 2 arguments have been given ...
+    # Check that more than 2 arguments have been given ...
     raise(Puppet::ParseError, "concat(): Wrong number of arguments " +
-      "given (#{arguments.size} for 2)") if arguments.size != 2
+      "given (#{arguments.size} for < 2)") if arguments.size < 2
 
     a = arguments[0]
-    b = arguments[1]
 
     # Check that the first parameter is an array
     unless a.is_a?(Array)
       raise(Puppet::ParseError, 'concat(): Requires array to work with')
     end
 
-    result = a + Array(b)
+    result = a
+    arguments.shift
+
+    arguments.each do |x|
+      result = result + Array(x)
+    end
 
     return result
   end

spec/acceptance/concat_spec.rb

@@ -12,6 +12,28 @@
       }
       EOS
 
+      apply_manifest(pp, :catch_failures => true)
+    end
+    it 'should concat arrays and primitives to array' do
+      pp = <<-EOS
+      $output = concat(['1','2','3'],'4','5','6',['7','8','9'])
+      validate_array($output)
+      if size($output) != 9 {
+        fail("${output} should have 9 elements.")
+      }
+      EOS
+
+      apply_manifest(pp, :catch_failures => true)
+    end
+    it 'should concat multiple arrays to one' do
+      pp = <<-EOS
+      $output = concat(['1','2','3'],['4','5','6'],['7','8','9'])
+      validate_array($output)
+      if size($output) != 6 {
+        fail("${output} should have 9 elements.")
+      }
+      EOS
+
       apply_manifest(pp, :catch_failures => true)
     end
   end

spec/functions/concat_spec.rb

@@ -4,14 +4,19 @@
 describe "the concat function" do
   let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
 
-  it "should raise a ParseError if the client does not provide two arguments" do
+  it "should raise a ParseError if the client does not provide at least two arguments" do
     expect { scope.function_concat([]) }.to(raise_error(Puppet::ParseError))
+    expect { scope.function_concat([[1]]) }.to(raise_error(Puppet::ParseError))
   end
 
   it "should raise a ParseError if the first parameter is not an array" do
     expect { scope.function_concat([1, []])}.to(raise_error(Puppet::ParseError))
   end
 
+  it "should not raise a ParseError if the client provides more than two arguments" do
+    expect { scope.function_concat([[1],[2],[3]]) }.not_to raise_error
+  end
+
   it "should be able to concat an array" do
     result = scope.function_concat([['1','2','3'],['4','5','6']])
     expect(result).to(eq(['1','2','3','4','5','6']))
@@ -32,4 +37,14 @@
     result = scope.function_concat([array_original,['4','5','6']])
     array_original.should(eq(['1','2','3']))
   end
+
+  it "should be able to concat multiple arrays" do
+    result = scope.function_concat([['1','2','3'],['4','5','6'],['7','8','9']])
+    expect(result).to(eq(['1','2','3','4','5','6','7','8','9']))
+  end
+
+  it "should be able to concat mix of primitives and arrays to a final array" do
+    result = scope.function_concat([['1','2','3'],'4',['5','6','7']])
+    expect(result).to(eq(['1','2','3','4','5','6','7']))
+  end
 end