Extend UnreachableCode rule: handle control flow (#83)

spec/ameba/ast/visitors/flow_expression_visitor_spec.cr

@@ -25,7 +25,7 @@ module Ameba::AST
           end
         end
       )
-      rule.expressions.size.should eq 2
+      rule.expressions.size.should eq 3
     end
 
     it "properly creates nested flow expressions" do
@@ -40,7 +40,7 @@ module Ameba::AST
           )
         end
       )
-      rule.expressions.size.should eq 3
+      rule.expressions.size.should eq 4
     end
 
     it "creates an expression for break" do

spec/ameba/ast/visitors/node_visitor_spec.cr

@@ -5,14 +5,12 @@ module Ameba::AST
   source = Source.new ""
 
   describe NodeVisitor do
-    {% for name in NODES %}
-      describe "{{name}}" do
-        it "allow to visit {{name}} node" do
-          visitor = NodeVisitor.new rule, source
-          nodes = Crystal::Parser.new("").parse
-          nodes.accept visitor
-        end
+    describe "visit" do
+      it "allow to visit ASTNode" do
+        visitor = NodeVisitor.new rule, source
+        nodes = Crystal::Parser.new("").parse
+        nodes.accept visitor
       end
-    {% end %}
+    end
   end
 end