1 files changed, 52 insertions, 16 deletions
diff --git a/spec/unit/puppet/parser/functions/range_spec.rb b/spec/unit/puppet/parser/functions/range_spec.rb
index 42751f4..0e1ad37 100644
--- a/spec/unit/puppet/parser/functions/range_spec.rb
+++ b/spec/unit/puppet/parser/functions/range_spec.rb
@@ -4,31 +4,67 @@ require 'spec_helper'
 describe "the range function" do
   let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
 
-  it "should exist" do
+  it "exists" do
     Puppet::Parser::Functions.function("range").should == "function_range"
   end
 
-  it "should raise a ParseError if there is less than 1 arguments" do
-    lambda { scope.function_range([]) }.should( raise_error(Puppet::ParseError))
+  it "raises a ParseError if there is less than 1 arguments" do
+    expect { scope.function_range([]) }.to raise_error Puppet::ParseError, /Wrong number of arguments.*0 for 1/
   end
 
-  it "should return a letter range" do
-    result = scope.function_range(["a","d"])
-    result.should(eq(['a','b','c','d']))
-  end
+  describe 'with a letter range' do
+    it "returns a letter range" do
+      result = scope.function_range(["a","d"])
+      result.should eq ['a','b','c','d']
+    end
+
+    it "returns a letter range given a step of 1" do
+      result = scope.function_range(["a","d","1"])
+      result.should eq ['a','b','c','d']
+    end
 
-  it "should return a number range" do
-    result = scope.function_range(["1","4"])
-    result.should(eq([1,2,3,4]))
+    it "returns a stepped letter range" do
+      result = scope.function_range(["a","d","2"])
+      result.should eq ['a','c']
+    end
+
+    it "returns a stepped letter range given a negative step" do
+      result = scope.function_range(["a","d","-2"])
+      result.should eq ['a','c']
+    end
   end
 
-  it "should work with padded hostname like strings" do
-    expected = ("host01".."host10").to_a
-    scope.function_range(["host01","host10"]).should eq expected
+  describe 'with a number range' do
+    it "returns a number range" do
+      result = scope.function_range(["1","4"])
+      result.should eq [1,2,3,4]
+    end
+
+    it "returns a number range given a step of 1" do
+      result = scope.function_range(["1","4","1"])
+      result.should eq [1,2,3,4]
+    end
+
+    it "returns a stepped number range" do
+      result = scope.function_range(["1","4","2"])
+      result.should eq [1,3]
+    end
+
+    it "returns a stepped number range given a negative step" do
+      result = scope.function_range(["1","4","-2"])
+      result.should eq [1,3]
+    end
   end
 
-  it "should coerce zero padded digits to integers" do
-    expected = (0..10).to_a
-    scope.function_range(["00", "10"]).should eq expected
+  describe 'with a numeric-like string range' do
+    it "works with padded hostname like strings" do
+      expected = ("host01".."host10").to_a
+      scope.function_range(["host01","host10"]).should eq expected
+    end
+
+    it "coerces zero padded digits to integers" do
+      expected = (0..10).to_a
+      scope.function_range(["00", "10"]).should eq expected
+    end
   end
 end