adding a bind value collector

1 files changed, 62 insertions, 0 deletions

diff --git a/test/collectors/test_bind_collector.rb b/test/collectors/test_bind_collector.rb
new file mode 100644
index 0000000000..c7748d7d10
--- /dev/null
+++ b/test/collectors/test_bind_collector.rb
@@ -0,0 +1,62 @@
+require 'helper'
+require 'arel/collectors/bind'
+
+module Arel
+  module Collectors
+    class TestBindCollector < Arel::Test
+      def setup
+        @conn = FakeRecord::Base.new
+        @visitor = Visitors::ToSql.new @conn.connection
+        super
+      end
+
+      def collect node
+        @visitor.accept(node, Collectors::Bind.new)
+      end
+
+      def compile node
+        collect(node).value
+      end
+
+      def ast_with_binds bv
+        table = Table.new(:users)
+        manager = Arel::SelectManager.new Table.engine, table
+        manager.where(table[:age].eq(bv))
+        manager.where(table[:name].eq(bv))
+        manager.ast
+      end
+
+      def test_leaves_binds
+        node = Nodes::BindParam.new 'omg'
+        list = compile node
+        assert_equal node, list.first
+        assert_equal node.class, list.first.class
+      end
+
+      def test_adds_strings
+        bv = Nodes::BindParam.new('?')
+        list = compile ast_with_binds bv
+        assert_operator list.length, :>, 0
+        assert_equal bv, list.grep(Nodes::BindParam).first
+        assert_equal bv.class, list.grep(Nodes::BindParam).first.class
+      end
+
+      def test_substitute_binds
+        bv = Nodes::BindParam.new('?')
+        collector = collect ast_with_binds bv
+
+        values = collector.value
+
+        offsets = values.map.with_index { |v,i|
+          [v,i]
+        }.find_all { |(v,i)| Nodes::BindParam === v }.map(&:last)
+
+        list = collector.substitute_binds ["hello", "world"]
+        assert_equal "hello", list[offsets[0]]
+        assert_equal "world", list[offsets[1]]
+
+        assert_equal 'SELECT FROM "users" WHERE "users"."age" = hello AND "users"."name" = world', list.join
+      end
+    end
+  end
+end