spec/front_end/parser_spec.rb in loxxy-0.0.9 vs spec/front_end/parser_spec.rb in loxxy-0.0.10

@@ -253,12 +253,29 @@
           expect(expr.operands[1].literal.value).to eq('ve')
         end
       end # context
 
       context 'Parsing comparison expressions' do
-        it 'should parse the comparison of two number literals' do
-          %w[> >= < <=].each do |predicate|
+      it 'should parse the comparison of two number literals' do
+        %w[> >= < <=].each do |predicate|
+          input = "3 #{predicate} 2;"
+          ptree = subject.parse(input)
+          parent = ptree.root.subnodes[0]
+          expect(parent).to be_kind_of(Rley::PTree::NonTerminalNode)
+          expect(parent.symbol.name).to eq('exprStmt')
+          expr = parent.subnodes[0]
+          expect(expr).to be_kind_of(Ast::LoxBinaryExpr)
+          expect(expr.operator).to eq(predicate.to_sym)
+          expect(expr.operands[0].literal.value).to eq(3)
+          expect(expr.operands[1].literal.value).to eq(2)
+        end
+      end
+      end # context
+
+      context 'Parsing equality expressions' do
+        it 'should parse the equality of two number literals' do
+          %w[!= ==].each do |predicate|
             input = "3 #{predicate} 2;"
             ptree = subject.parse(input)
             parent = ptree.root.subnodes[0]
             expect(parent).to be_kind_of(Rley::PTree::NonTerminalNode)
             expect(parent.symbol.name).to eq('exprStmt')
@@ -266,9 +283,25 @@
             expect(expr).to be_kind_of(Ast::LoxBinaryExpr)
             expect(expr.operator).to eq(predicate.to_sym)
             expect(expr.operands[0].literal.value).to eq(3)
             expect(expr.operands[1].literal.value).to eq(2)
           end
+        end
+
+        it 'should parse combination of equality expressions' do
+          input = '5 != 2 == false; // A bit contrived example'
+          ptree = subject.parse(input)
+          parent = ptree.root.subnodes[0]
+          expect(parent).to be_kind_of(Rley::PTree::NonTerminalNode)
+          expect(parent.symbol.name).to eq('exprStmt')
+          expr = parent.subnodes[0]
+          expect(expr).to be_kind_of(Ast::LoxBinaryExpr)
+          expect(expr.operator).to eq(:==)
+          expect(expr.operands[0]).to be_kind_of(Ast::LoxBinaryExpr)
+          expect(expr.operands[0].operator).to eq(:!=)
+          expect(expr.operands[0].operands[0].literal.value).to eq(5)
+          expect(expr.operands[0].operands[1].literal.value).to eq(2)
+          expect(expr.operands[1].literal.value).to be_falsey
         end
       end # context
     end # describe
   end # module
 end # module