local v = require 'semver'

local function checkVersion(ver, major, minor, patch)
  assert_equal(major, ver.major)
  assert_equal(minor, ver.minor)
  assert_equal(patch, ver.patch)
end

context('semver', function()

  context('creation', function()

    context('from numbers', function()
      it('parses 3 numbers correctly', function()
        checkVersion(v(1,2,3), 1,2,3)
      end)

      it('parses 2 numbers correctly', function()
        checkVersion(v(1,2), 1,2,0)
      end)

      it('parses 1 number correctly', function()
        checkVersion(v(1), 1,0,0)
      end)
    end)

    describe("from strings", function()
      test("1.2.3", function()
        checkVersion( v'1.2.3', 1,2,3)
      end)
      test("10.20.123", function()
        checkVersion( v'10.20.123', 10,20,123)
      end)
      test("2.0", function()
        checkVersion( v'2.0', 2,0,0)
      end)
      test("5", function()
        checkVersion( v'5', 5,0,0)
      end)
    end)

    describe('errors are thrown in', function()
      test('no parameters are passed', function()
        assert_error(function() v() end)
      end)
      test('negative numbers', function()
        assert_error(function() v(-1, 0, 0) end)
        assert_error(function() v( 0,-1, 0) end)
        assert_error(function() v( 0, 0,-1) end)
      end)
      test('floats', function()
        assert_error(function() v(.1, 0, 0) end)
        assert_error(function() v( 0,.1, 0) end)
        assert_error(function() v( 0, 0,.1) end)
      end)
      test('empty string', function()
        assert_error(function() v("") end)
      end)
      test('garbage at the beginning of the string', function()
        assert_error(function() v("foobar1.2.3") end)
      end)
      test('garbage at the end of the string', function()
        assert_error(function() v("1.2.3foobar") end)
      end)
    end)

  end)
end)