view/test/test_buffer.rb

# test_buffer.rb: Test suites of Edmaru::Buffer based on Test::Unit.
#
# Copyright (C) 2007 Takashi Nakamoto
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA.
#
require "test/unit"
require "buffer"

module EdmaruTest
  class TC_Buffer < Test::Unit::TestCase
    def setup
      @obj = Edmaru::Buffer.new("test buffer")
    end

    def test_initilization
      assert_instance_of(Edmaru::Buffer, @obj)
      assert_instance_of(Array, @obj.lines)
      assert_equal(1, @obj.lines.size)
      assert_equal("", @obj.lines[0])
    end

    def test_manipulation
      # Tests for appending a string.
      @obj.append("test")
      assert_equal(1, @obj.lines.size)
      assert_equal("test", @obj.lines[0])

      # Tests for appending "\n".
      @obj.append("\n")
      assert_equal(2, @obj.lines.size)
      assert_equal("test", @obj.lines[0])
      assert_equal("", @obj.lines[1])

      # Tests for appending a string including "\n"
      @obj.append("abc\ndef")
      assert_equal(3, @obj.lines.size)
      assert_equal("test", @obj.lines[0])
      assert_equal("abc", @obj.lines[1])
      assert_equal("def", @obj.lines[2])

      # Now the buffer contains the following text:
      #test
      #abc
      #def

      # Validations for the specified position.
      assert_equal(true, @obj.valid_position?(0, 0))
      assert_equal(true, @obj.valid_position?(0, 4))
      assert_equal(true, @obj.valid_position?(2, 0))
      assert_equal(true, @obj.valid_position?(2, 3))
      assert_equal(false, @obj.valid_position?(-1, 0))
      assert_equal(false, @obj.valid_position?(0, -1))
      assert_equal(false, @obj.valid_position?(0, 5))
      assert_equal(false, @obj.valid_position?(3, 0))
      assert_equal(false, @obj.valid_position?(2, 4))

      # Tests for inserting an empty string.
      @obj.insert(0, 0, "")
      assert_equal(3, @obj.lines.size)
      assert_equal("test", @obj.lines[0])
      assert_equal("abc", @obj.lines[1])
      assert_equal("def", @obj.lines[2])

      # Tests for inserting a string that doesn't contain "\n".
      @obj.insert(1, 2, "ghi")
      assert_equal(3, @obj.lines.size)
      assert_equal("test", @obj.lines[0])
      assert_equal("abghic", @obj.lines[1])
      assert_equal("def", @obj.lines[2])

      @obj.insert(2, 3, "ine")
      assert_equal(3, @obj.lines.size)
      assert_equal("test", @obj.lines[0])
      assert_equal("abghic", @obj.lines[1])
      assert_equal("define", @obj.lines[2])

      # Tests for inserting a string that contains "\n".
      @obj.insert(2, 3, "ine\nf")
      assert_equal(4, @obj.lines.size)
      assert_equal("test", @obj.lines[0])
      assert_equal("abghic", @obj.lines[1])
      assert_equal("define", @obj.lines[2])
      assert_equal("fine", @obj.lines[3])

      # Tests for inserting a string at an invalid position.
      assert_raise(RuntimeError){
        @obj.insert(4, 0, " ")
      }

      # Now the buffer contains the following text:
      #test
      #abghic
      #define
      #fine

      # Tests for clear all strings.
      @obj.clear
      assert_equal(1, @obj.lines.size)
      assert_equal("", @obj.lines[0])
    end
  end
end