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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Banzai::Filter::TruncateSourceFilter do
include FilterSpecHelper
let(:short_text) { 'foo' * 10 }
let(:long_text) { ([short_text] * 10).join(' ') }
before do
stub_const("#{described_class}::CHARACTER_COUNT_LIMIT", 50)
stub_const("#{described_class}::USER_MSG_LIMIT", 20)
end
context 'when markdown belongs to a blob' do
it 'does nothing when limit is unspecified' do
output = filter(long_text, text_source: :blob)
expect(output).to eq(long_text)
end
it 'truncates normally when limit specified' do
truncated = 'foofoof...'
output = filter(long_text, text_source: :blob, limit: 10)
expect(output).to eq(truncated)
end
end
context 'when markdown belongs to a field (non-blob)' do
it 'does nothing when limit is greater' do
output = filter(long_text, limit: 1.megabyte)
expect(output).to eq(long_text)
end
it 'truncates to the default when limit is unspecified' do
stub_const("#{described_class}::USER_MSG_LIMIT", 200)
truncated = 'foofoofoofoofoofoofoofoofoofoo foofoofoofoofoof...'
output = filter(long_text)
expect(output).to eq(truncated)
end
it 'prepends the user message' do
truncated = <<~TEXT
_The text is longer than 50 characters and has been visually truncated._
foofoofoofoofoofoofoofoofoofoo foofoofoofoofoof...
TEXT
output = filter(long_text)
expect(output).to eq(truncated.strip)
end
it 'does nothing to a short-enough text' do
output = filter(short_text, limit: short_text.bytesize)
expect(output).to eq(short_text)
end
it 'truncates UTF-8 text by bytes, on a character boundary' do
utf8_text = '日本語の文字が大きい'
truncated = '日...'
expect(filter(utf8_text, limit: truncated.bytesize)).to eq(truncated)
expect(filter(utf8_text, limit: utf8_text.bytesize)).to eq(utf8_text)
expect(filter(utf8_text, limit: utf8_text.mb_chars.size)).not_to eq(utf8_text)
end
end
end
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