add hash_merge function

1 files changed, 34 insertions, 0 deletions

diff --git a/spec/unit/parser/functions/hash_merge.rb b/spec/unit/parser/functions/hash_merge.rb
new file mode 100644
index 0000000..0bd8fc1
--- /dev/null
+++ b/spec/unit/parser/functions/hash_merge.rb
@@ -0,0 +1,34 @@
+#! /usr/bin/env ruby
+
+require File.dirname(__FILE__) + '/../../../spec_helper'
+
+describe "the hash_merge function" do
+
+  before :each do
+    @scope = Puppet::Parser::Scope.new
+  end
+
+  it "should exist" do
+    Puppet::Parser::Functions.function("hash_merge").should == "function_hash_merge"
+  end
+
+  it "should raise a ParseError if there is less than 2 arguments" do
+    lambda { @scope.function_hash_merge(["foo"]) }.should( raise_error(Puppet::ParseError))
+  end
+
+  it "should raise a ParseError if there is more than 2 arguments" do
+    lambda { @scope.function_hash_merge(["foo", "bar", "gazonk"]) }.should( raise_error(Puppet::ParseError))
+  end
+
+  it "should merge the two hashes" do
+    result = @scope.function_hash_merge([{'a' => 1 ,'b' => 2},{'b' => 3, 'c' => 4}])
+    result.should == {'a' => 1 ,'b' => 3, 'c' => 4}
+  end
+
+  it "should leave the argument untouched" do
+    a = {'a' => 1 ,'b' => 2}
+    result = @scope.function_hash_merge([{'a' => 1 ,'b' => 2},{'b' => 3, 'c' => 4}])
+    a.should == {'a' => 1 ,'b' => 2}
+  end
+
+end