From c86c37e5f32ca76fa7aa77e62018e368dbb37a54 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Mon, 29 Nov 2010 14:11:28 -0800
Subject: mostly implemented depth-first traversal

---
 test/visitors/test_depth_first.rb | 76 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 test/visitors/test_depth_first.rb

(limited to 'test')

diff --git a/test/visitors/test_depth_first.rb b/test/visitors/test_depth_first.rb
new file mode 100644
index 0000000000..eff60576fc
--- /dev/null
+++ b/test/visitors/test_depth_first.rb
@@ -0,0 +1,76 @@
+require 'helper'
+
+module Arel
+  module Visitors
+    class TestDepthFirst < MiniTest::Unit::TestCase
+      Collector = Struct.new(:calls) do
+        def call object
+          calls << object
+        end
+      end
+
+      def setup
+        @collector = Collector.new []
+        @visitor = Visitors::DepthFirst.new @collector
+      end
+
+      [
+        Arel::Nodes::And,
+        Arel::Nodes::Assignment,
+        Arel::Nodes::Between,
+        Arel::Nodes::DoesNotMatch,
+        Arel::Nodes::Equality,
+        Arel::Nodes::GreaterThan,
+        Arel::Nodes::GreaterThanOrEqual,
+        Arel::Nodes::In,
+        Arel::Nodes::LessThan,
+        Arel::Nodes::LessThanOrEqual,
+        Arel::Nodes::Matches,
+        Arel::Nodes::NotEqual,
+        Arel::Nodes::NotIn,
+        Arel::Nodes::Or,
+      ].each do |klass|
+        define_method("test_#{klass.name.gsub('::', '_')}") do
+          binary = klass.new(:a, :b)
+          @visitor.accept binary
+          assert_equal [:a, :b, binary], @collector.calls
+        end
+      end
+
+      [
+        Arel::Attributes::Integer,
+        Arel::Attributes::Float,
+        Arel::Attributes::String,
+        Arel::Attributes::Time,
+        Arel::Attributes::Boolean,
+        Arel::Attributes::Attribute
+      ].each do |klass|
+        define_method("test_#{klass.name.gsub('::', '_')}") do
+          binary = klass.new(:a, :b)
+          @visitor.accept binary
+          assert_equal [:a, :b, binary], @collector.calls
+        end
+      end
+
+      def test_table
+        relation = Arel::Table.new(:users)
+        @visitor.accept relation
+        assert_equal ['users', relation], @collector.calls
+      end
+
+      def test_array
+        node = Nodes::Or.new(:a, :b)
+        list = [node]
+        @visitor.accept list
+        assert_equal [:a, :b, node, list], @collector.calls
+      end
+
+      def test_hash
+        node = Nodes::Or.new(:a, :b)
+        hash = { node => node }
+        @visitor.accept hash
+        assert_equal [:a, :b, node, :a, :b, node, hash], @collector.calls
+      end
+    end
+  end
+end
-- 
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