--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stdlib/spec/functions/is_float_spec.rb	Sat Mar 14 20:09:45 2015 +0000
@@ -0,0 +1,33 @@
+#! /usr/bin/env ruby -S rspec
+require 'spec_helper'
+
+describe "the is_float function" do
+  let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
+
+  it "should exist" do
+    expect(Puppet::Parser::Functions.function("is_float")).to eq("function_is_float")
+  end
+
+  it "should raise a ParseError if there is less than 1 arguments" do
+    expect { scope.function_is_float([]) }.to( raise_error(Puppet::ParseError))
+  end
+
+  it "should return true if a float" do
+    result = scope.function_is_float(["0.12"])
+    expect(result).to(eq(true))
+  end
+
+  it "should return false if a string" do
+    result = scope.function_is_float(["asdf"])
+    expect(result).to(eq(false))
+  end
+
+  it "should return false if an integer" do
+    result = scope.function_is_float(["3"])
+    expect(result).to(eq(false))
+  end
+  it "should return true if a float is created from an arithmetical operation" do
+    result = scope.function_is_float([3.2*2])
+    expect(result).to(eq(true))
+  end
+end