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require 'abstract_unit'
class MiddlewareStackTest < ActiveSupport::TestCase
class FooMiddleware; end
class BarMiddleware; end
class BazMiddleware; end
class BlockMiddleware
attr_reader :block
def initialize(&block)
@block = block
end
end
def setup
@stack = ActionDispatch::MiddlewareStack.new
@stack.use FooMiddleware
@stack.use BarMiddleware
end
test "use should push middleware as class onto the stack" do
assert_difference "@stack.size" do
@stack.use BazMiddleware
end
assert_equal BazMiddleware, @stack.last.klass
end
test "use should push middleware as a string onto the stack" do
assert_difference "@stack.size" do
@stack.use "MiddlewareStackTest::BazMiddleware"
end
assert_equal BazMiddleware, @stack.last.klass
end
test "use should push middleware as a symbol onto the stack" do
assert_difference "@stack.size" do
@stack.use :"MiddlewareStackTest::BazMiddleware"
end
assert_equal BazMiddleware, @stack.last.klass
end
test "use should push middleware class with arguments onto the stack" do
assert_difference "@stack.size" do
@stack.use BazMiddleware, true, :foo => "bar"
end
assert_equal BazMiddleware, @stack.last.klass
assert_equal([true, {:foo => "bar"}], @stack.last.args)
end
test "use should push middleware class with block arguments onto the stack" do
proc = Proc.new {}
assert_difference "@stack.size" do
@stack.use(BlockMiddleware, &proc)
end
assert_equal BlockMiddleware, @stack.last.klass
assert_equal proc, @stack.last.block
end
test "insert inserts middleware at the integer index" do
@stack.insert(1, BazMiddleware)
assert_equal BazMiddleware, @stack[1].klass
end
test "insert_after inserts middleware after the integer index" do
@stack.insert_after(1, BazMiddleware)
assert_equal BazMiddleware, @stack[2].klass
end
test "insert_before inserts middleware before another middleware class" do
@stack.insert_before(BarMiddleware, BazMiddleware)
assert_equal BazMiddleware, @stack[1].klass
end
test "insert_after inserts middleware after another middleware class" do
@stack.insert_after(BarMiddleware, BazMiddleware)
assert_equal BazMiddleware, @stack[2].klass
end
test "swaps one middleware out for another" do
assert_equal FooMiddleware, @stack[0].klass
@stack.swap(FooMiddleware, BazMiddleware)
assert_equal BazMiddleware, @stack[0].klass
end
test "swaps one middleware out for same middleware class" do
assert_equal FooMiddleware, @stack[0].klass
@stack.swap(FooMiddleware, FooMiddleware, Proc.new { |env| [500, {}, ['error!']] })
assert_equal FooMiddleware, @stack[0].klass
end
test "raise an error on invalid index" do
assert_raise RuntimeError do
@stack.insert("HiyaMiddleware", BazMiddleware)
end
assert_raise RuntimeError do
@stack.insert_after("HiyaMiddleware", BazMiddleware)
end
end
test "lazy evaluates middleware class" do
assert_difference "@stack.size" do
@stack.use "MiddlewareStackTest::BazMiddleware"
end
assert_equal BazMiddleware, @stack.last.klass
end
test "lazy compares so unloaded constants are not loaded" do
@stack.use "UnknownMiddleware"
@stack.use :"MiddlewareStackTest::BazMiddleware"
assert @stack.include?("::MiddlewareStackTest::BazMiddleware")
end
end
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