# frozen_string_literal: true

RSpec.describe TruncateLogsFormatter do
  describe "#call" do
    describe "when the formatter is initialized with `log_line_max_chars` of 10" do
      let(:formatter) { TruncateLogsFormatter.new(log_line_max_chars: 10) }

      describe "when the messages is 5 characters long" do
        it "does not truncate the message" do
          expect(formatter.call(nil, nil, nil, "abcde")).to eq("abcde")
        end
      end

      describe "when the message is 10 characters long" do
        it "does not truncate the message" do
          expect(formatter.call(nil, nil, nil, "aaaaaaaaaa")).to eq("aaaaaaaaaa")
        end
      end

      describe "when the message is 11 characters long" do
        it "truncates the message with the configured postfix" do
          expect(formatter.call(nil, nil, nil, "aaaaaaaaaaa")).to eq("aaaaaaaaaa...(truncated)")
        end

        it "truncates the message while preserving newlines" do
          expect(formatter.call(nil, nil, nil, "aaaaaaaaaaa\n")).to eq("aaaaaaaaaa...(truncated)\n")
        end
      end
    end
  end
end