New rule: RedundantNext

closes #131

spec/ameba/ast/visitors/redundant_control_expression_visitor_spec.cr

@@ -0,0 +1,26 @@
+require "../../../spec_helper"
+
+module Ameba::AST
+  source = Source.new ""
+  rule = RedundantControlExpressionRule.new
+
+  describe RedundantControlExpressionVisitor do
+    node = as_node %(
+      a = 1
+      b = 2
+      return a + b
+    )
+    subject = RedundantControlExpressionVisitor.new(rule, source, node)
+
+    it "assigns valid attributes" do
+      subject.rule.should eq rule
+      subject.source.should eq source
+      subject.node.should eq node
+    end
+
+    it "fires a callback with a valid node" do
+      rule.nodes.size.should eq 1
+      rule.nodes.first.to_s.should eq "return a + b"
+    end
+  end
+end