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require 'helper'
require 'arel/visitors/bind_visitor'
require 'support/fake_record'
module Arel
module Visitors
class TestBindVisitor < MiniTest::Unit::TestCase
##
# Tests visit_Arel_Nodes_Assignment correctly
# substitutes binds with values from block
def test_assignment_binds_are_substituted
table = Table.new(:users)
um = Arel::UpdateManager.new Table.engine
bp = Nodes::BindParam.new '?'
um.set [[table[:name], bp]]
visitor = Class.new(Arel::Visitors::ToSql) {
include Arel::Visitors::BindVisitor
}.new Table.engine.connection
assignment = um.ast.values[0]
actual = visitor.accept(assignment) { "replace" }
actual.must_be_like "\"name\" = replace"
end
def test_visitor_yields_on_binds
visitor = Class.new(Arel::Visitors::Visitor) {
def initialize omg
end
include Arel::Visitors::BindVisitor
}.new nil
bp = Nodes::BindParam.new 'omg'
called = false
visitor.accept(bp) { called = true }
assert called
end
def test_visitor_only_yields_on_binds
visitor = Class.new(Arel::Visitors::Visitor) {
def initialize omg
end
include Arel::Visitors::BindVisitor
}.new(nil)
bp = Arel.sql 'omg'
called = false
assert_raises(TypeError) {
visitor.accept(bp) { called = true }
}
refute called
end
end
end
end
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