Adding []/[]= support to Scope

The interface to scope is much clearer this way anyway,
but this is needed to integrate Puppet with Hiera[1].
It just provides hash-like behavior to Scope, which Hiera
and others can now easily rely on.

I also went through all of the code that used Scope#lookupvar
and Scope#setvar and changed it if possible, and at the same
time cleaned up a lot of tests that were unnecessarily stubbing
(and thus making it difficult to tell if I had actually broken
anything).

1 - https://github.com/ripienaar/hiera

Signed-off-by: Luke Kanies <luke@puppetlabs.com>
Reviewed-by: Nick Lewis <nick@puppetlabs.com>

2 files changed, 7 insertions, 15 deletions

diff --git a/spec/unit/parser/functions/extlookup_spec.rb b/spec/unit/parser/functions/extlookup_spec.rb
index f68daaf3f..30962e137 100755
--- a/spec/unit/parser/functions/extlookup_spec.rb
+++ b/spec/unit/parser/functions/extlookup_spec.rb
@@ -64,7 +64,7 @@ describe "the extlookup function" do
 
   describe "should look in $extlookup_datadir for data files listed by $extlookup_precedence" do
     before do
-      @scope.stubs(:lookupvar).with('::extlookup_datadir').returns("/tmp")
+      @scope.stubs(:[]).with('::extlookup_datadir').returns("/tmp")
       File.open("/tmp/one.csv","w"){|one| one.puts "key,value1" }
       File.open("/tmp/two.csv","w") do |two|
         two.puts "key,value2"
@@ -73,21 +73,21 @@ describe "the extlookup function" do
     end
 
     it "when the key is in the first file" do
-      @scope.stubs(:lookupvar).with('::extlookup_precedence').returns(["one","two"])
+      @scope.stubs(:[]).with('::extlookup_precedence').returns(["one","two"])
       result = @scope.function_extlookup([ "key" ])
       result.should == "value1"
     end
 
     it "when the key is in the second file" do
-      @scope.stubs(:lookupvar).with('::extlookup_precedence').returns(["one","two"])
+      @scope.stubs(:[]).with('::extlookup_precedence').returns(["one","two"])
       result = @scope.function_extlookup([ "key2" ])
       result.should == "value_two"
     end
 
     it "should not modify extlookup_precedence data" do
       variable = '%{fqdn}'
-      @scope.stubs(:lookupvar).with('::extlookup_precedence').returns([variable,"one"])
-      @scope.stubs(:lookupvar).with('::fqdn').returns('myfqdn')
+      @scope.stubs(:[]).with('::extlookup_precedence').returns([variable,"one"])
+      @scope.stubs(:[]).with('::fqdn').returns('myfqdn')
       result = @scope.function_extlookup([ "key" ])
       variable.should == '%{fqdn}'
     end
diff --git a/spec/unit/parser/functions/fqdn_rand_spec.rb b/spec/unit/parser/functions/fqdn_rand_spec.rb
index 90fc0ef41..53c498453 100755
--- a/spec/unit/parser/functions/fqdn_rand_spec.rb
+++ b/spec/unit/parser/functions/fqdn_rand_spec.rb
@@ -8,6 +8,7 @@ describe "the fqdn_rand function" do
 
   before :each do
     @scope = Puppet::Parser::Scope.new
+    @scope[:fqdn] = "127.0.0.1"
   end
 
   it "should exist" do
@@ -15,49 +16,40 @@ describe "the fqdn_rand function" do
   end
 
   it "should handle 0 arguments" do
-    @scope.expects(:lookupvar).with("::fqdn").returns("127.0.0.1")
     lambda { @scope.function_fqdn_rand([]) }.should_not raise_error(Puppet::ParseError)
   end
 
   it "should handle 1 argument'}" do
-    @scope.expects(:lookupvar).with("::fqdn").returns("127.0.0.1")
     lambda { @scope.function_fqdn_rand([3]) }.should_not raise_error(Puppet::ParseError)
   end
 
 
   (1..10).each { |n|
     it "should handle #{n} additional arguments" do
-      @scope.expects(:lookupvar).with("::fqdn").returns("127.0.0.1")
       lambda { @scope.function_fqdn_rand([3,1,2,3,4,5,6,7,8,9,10][0..n]) }.should_not raise_error(Puppet::ParseError)
     end
     it "should handle #{n} additional string arguments" do
-      @scope.expects(:lookupvar).with("::fqdn").returns("127.0.0.1")
       lambda { @scope.function_fqdn_rand([3,%w{ 1 2 3 4 5 6 7 8 9 10}].flatten[0..n]) }.should_not raise_error(Puppet::ParseError)
     end
   }
 
   it "should return a value less than max" do
-    @scope.expects(:lookupvar).with("::fqdn").returns("127.0.0.1")
     @scope.function_fqdn_rand([3]).should satisfy {|n| n.to_i < 3 }
   end
 
   it "should return the same values on subsequent invocations for the same host" do
-    @scope.expects(:lookupvar).with("::fqdn").returns("127.0.0.1").twice
     @scope.function_fqdn_rand([3,4]).should eql(@scope.function_fqdn_rand([3, 4]))
   end
 
   it "should return different sequences of value for different hosts" do
-    @scope.expects(:lookupvar).with("::fqdn").returns("127.0.0.1")
     val1 = @scope.function_fqdn_rand([10000000,4])
-    @scope.expects(:lookupvar).with("::fqdn").returns("127.0.0.2")
+    @scope.expects(:[]).with("::fqdn").returns("127.0.0.2")
     val2 = @scope.function_fqdn_rand([10000000,4])
     val1.should_not eql(val2)
   end
 
   it "should return different values for the same hosts with different seeds" do
-    @scope.expects(:lookupvar).with("::fqdn").returns("127.0.0.1")
     val1 = @scope.function_fqdn_rand([10000000,4])
-    @scope.expects(:lookupvar).with("::fqdn").returns("127.0.0.1")
     val2 = @scope.function_fqdn_rand([10000000,42])
     val1.should_not eql(val2)
   end