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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
def test_update_statement
stmt = Nodes::UpdateStatement.new
stmt.relation = :a
stmt.values << :b
stmt.wheres << :c
stmt.orders << :d
stmt.limit = :e
@visitor.accept stmt
assert_equal [:a, :b, stmt.values, :c, stmt.wheres, :d, stmt.orders,
:e, stmt], @collector.calls
end
def test_select_core
core = Nodes::SelectCore.new
core.projections << :a
core.froms = :b
core.wheres << :c
core.groups << :d
core.having = :e
@visitor.accept core
assert_equal [
:a, core.projections,
:b,
:c, core.wheres,
:d, core.groups,
:e,
core], @collector.calls
end
def test_select_statement
ss = Nodes::SelectStatement.new
ss.cores.replace [:a]
ss.orders << :b
ss.limit = :c
ss.lock = :d
ss.offset = :e
@visitor.accept ss
assert_equal [
:a, ss.cores,
:b, ss.orders,
:c,
:d,
:e,
ss], @collector.calls
end
def test_insert_statement
stmt = Nodes::InsertStatement.new
stmt.relation = :a
stmt.columns << :b
stmt.values = :c
@visitor.accept stmt
assert_equal [:a, :b, stmt.columns, :c, stmt], @collector.calls
end
def test_offset
end
end
end
end
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