Better XPath evaluation tests for numbers.

spec/oga/xpath/evaluator/types/float_spec.rb

@@ -4,16 +4,19 @@ describe Oga::XPath::Evaluator do
   context 'float types' do
     before do
       document   = parse('<a></a>')
-      evaluator = described_class.new(document)
-      @number   = evaluator.evaluate('1.2')
+      @evaluator = described_class.new(document)
     end
 
-    example 'return literal integers' do
-      @number.should == 1.2
+    example 'return a float' do
+      @evaluator.evaluate('1.2').should == 1.2
     end
 
-    example 'return integers as floats' do
-      @number.is_a?(Float).should == true
+    example 'return a negative float' do
+      @evaluator.evaluate('-1.2').should == -1.2
+    end
+
+    example 'return floats as a Float' do
+      @evaluator.evaluate('1.2').is_a?(Float).should == true
     end
   end
 end

spec/oga/xpath/evaluator/types/int_spec.rb

@@ -4,16 +4,19 @@ describe Oga::XPath::Evaluator do
   context 'integer types' do
     before do
       document   = parse('<a></a>')
-      evaluator = described_class.new(document)
-      @number   = evaluator.evaluate('1')
+      @evaluator = described_class.new(document)
     end
 
-    example 'return literal integers' do
-      @number.should == 1
+    example 'return an integer' do
+      @evaluator.evaluate('1').should == 1
     end
 
-    example 'return integers as floats' do
-      @number.is_a?(Float).should == true
+    example 'return a negative integer' do
+      @evaluator.evaluate('-2').should == -2
+    end
+
+    example 'return integers as a Float' do
+      @evaluator.evaluate('1').is_a?(Float).should == true
     end
   end
 end