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require 'abstract_unit'
class CaptureHelperTest < ActionView::TestCase
def setup
super
@av = ActionView::Base.new
@view_flow = ActionView::OutputFlow.new
end
def test_capture_captures_the_temporary_output_buffer_in_its_block
assert_nil @av.output_buffer
string = @av.capture do
@av.output_buffer << 'foo'
@av.output_buffer << 'bar'
end
assert_nil @av.output_buffer
assert_equal 'foobar', string
end
def test_capture_captures_the_value_returned_by_the_block_if_the_temporary_buffer_is_blank
string = @av.capture('foo', 'bar') do |a, b|
a + b
end
assert_equal 'foobar', string
end
def test_capture_returns_nil_if_the_returned_value_is_not_a_string
assert_nil @av.capture { 1 }
end
def test_capture_escapes_html
string = @av.capture { '<em>bar</em>' }
assert_equal '<em>bar</em>', string
end
def test_capture_doesnt_escape_twice
string = @av.capture { '<em>bar</em>'.html_safe }
assert_equal '<em>bar</em>', string
end
def test_capture_used_for_read
content_for :foo, "foo"
assert_equal "foo", content_for(:foo)
content_for(:bar){ "bar" }
assert_equal "bar", content_for(:bar)
end
def test_content_for_with_multiple_calls
assert ! content_for?(:title)
content_for :title, 'foo'
content_for :title, 'bar'
assert_equal 'foobar', content_for(:title)
end
def test_content_for_with_block
assert ! content_for?(:title)
content_for :title do
output_buffer << 'foo'
output_buffer << 'bar'
nil
end
assert_equal 'foobar', content_for(:title)
end
def test_content_for_with_whitespace_block
assert ! content_for?(:title)
content_for :title, 'foo'
content_for :title do
output_buffer << " \n "
nil
end
content_for :title, 'bar'
assert_equal 'foobar', content_for(:title)
end
def test_content_for_returns_nil_when_writing
assert ! content_for?(:title)
assert_equal nil, content_for(:title, 'foo')
assert_equal nil, content_for(:title) { output_buffer << 'bar'; nil }
assert_equal nil, content_for(:title) { output_buffer << " \n "; nil }
assert_equal 'foobar', content_for(:title)
end
def test_content_for_question_mark
assert ! content_for?(:title)
content_for :title, 'title'
assert content_for?(:title)
assert ! content_for?(:something_else)
end
def test_provide
assert !content_for?(:title)
provide :title, "hi"
assert content_for?(:title)
assert_equal "hi", content_for(:title)
provide :title, "<p>title</p>"
assert_equal "hi<p>title</p>", content_for(:title)
@view_flow = ActionView::OutputFlow.new
provide :title, "hi"
provide :title, "<p>title</p>".html_safe
assert_equal "hi<p>title</p>", content_for(:title)
end
def test_with_output_buffer_swaps_the_output_buffer_given_no_argument
assert_nil @av.output_buffer
buffer = @av.with_output_buffer do
@av.output_buffer << '.'
end
assert_equal '.', buffer
assert_nil @av.output_buffer
end
def test_with_output_buffer_swaps_the_output_buffer_with_an_argument
assert_nil @av.output_buffer
buffer = ActionView::OutputBuffer.new('.')
@av.with_output_buffer(buffer) do
@av.output_buffer << '.'
end
assert_equal '..', buffer
assert_nil @av.output_buffer
end
def test_with_output_buffer_restores_the_output_buffer
buffer = ActionView::OutputBuffer.new
@av.output_buffer = buffer
@av.with_output_buffer do
@av.output_buffer << '.'
end
assert buffer.equal?(@av.output_buffer)
end
def test_with_output_buffer_sets_proper_encoding
@av.output_buffer = ActionView::OutputBuffer.new
# Ensure we set the output buffer to an encoding different than the default one.
alt_encoding = alt_encoding(@av.output_buffer)
@av.output_buffer.force_encoding(alt_encoding)
@av.with_output_buffer do
assert_equal alt_encoding, @av.output_buffer.encoding
end
end
def test_with_output_buffer_does_not_assume_there_is_an_output_buffer
assert_nil @av.output_buffer
assert_equal "", @av.with_output_buffer {}
end
def test_flush_output_buffer_concats_output_buffer_to_response
view = view_with_controller
assert_equal [], view.response.body_parts
view.output_buffer << 'OMG'
view.flush_output_buffer
assert_equal ['OMG'], view.response.body_parts
assert_equal '', view.output_buffer
view.output_buffer << 'foobar'
view.flush_output_buffer
assert_equal ['OMG', 'foobar'], view.response.body_parts
assert_equal '', view.output_buffer
end
def test_flush_output_buffer_preserves_the_encoding_of_the_output_buffer
view = view_with_controller
alt_encoding = alt_encoding(view.output_buffer)
view.output_buffer.force_encoding(alt_encoding)
flush_output_buffer
assert_equal alt_encoding, view.output_buffer.encoding
end
def alt_encoding(output_buffer)
output_buffer.encoding == Encoding::US_ASCII ? Encoding::UTF_8 : Encoding::US_ASCII
end
def view_with_controller
TestController.new.view_context.tap do |view|
view.output_buffer = ActionView::OutputBuffer.new
end
end
end
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