optional_bounds_test.go

/*
 * nagopher - Library for writing Nagios plugins in Go
 * Copyright (C) 2018-2019  Pascal Mathis
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

package nagopher

import (
	"github.com/stretchr/testify/assert"
	"testing"
)

func TestOptionalBounds_Empty(t *testing.T) {
	// when
	optionalBounds := OptionalBounds{}
	actualBounds, err := optionalBounds.Get()

	// then
	assert.Error(t, err)
	assert.Empty(t, actualBounds)
}

func TestNewOptionalBounds(t *testing.T) {
	// given
	expectedBounds := NewBounds()

	// when
	optionalBounds := NewOptionalBounds(expectedBounds)
	actualBounds, err := optionalBounds.Get()

	// then
	assert.NoError(t, err)
	assert.Equal(t, true, optionalBounds.Present())
	assert.Equal(t, expectedBounds, actualBounds)
}

func TestOptionalBounds_OrElse(t *testing.T) {
	// given
	expectedBounds := NewBounds()
	alternativeBounds := NewBounds()

	// when
	optionalBounds1 := NewOptionalBounds(expectedBounds)
	optionalBounds2 := OptionalBounds{}

	// then
	assert.Equal(t, expectedBounds, optionalBounds1.OrElse(alternativeBounds))
	assert.Equal(t, alternativeBounds, optionalBounds2.OrElse(alternativeBounds))
}

func TestOptionalBounds_Set(t *testing.T) {
	// given
	bounds1 := NewBounds()
	bounds2 := NewBounds()
	alternativeBounds := NewBounds()
	optionalBounds := NewOptionalBounds(bounds1)

	// when
	optionalBounds.Set(bounds2)

	// then
	assert.Equal(t, true, optionalBounds.Present())
	assert.Equal(t, bounds2, optionalBounds.OrElse(alternativeBounds))
}

func TestOptionalBounds_If(t *testing.T) {
	// given
	var actualBoundsPtr *Bounds
	expectedBounds := NewBounds()
	optionalBounds := NewOptionalBounds(expectedBounds)

	// when
	optionalBounds.If(func(bounds Bounds) {
		actualBoundsPtr = &bounds
	})

	// then
	assert.Equal(t, &expectedBounds, actualBoundsPtr)
}