metric_numeric_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"
	"math"
	"testing"
)

func TestNewNumericMetric(t *testing.T) {
	// when
	metric1, err1 := NewNumericMetric("valid", 13.37, "K", nil, "")
	metric2, err2 := NewNumericMetric("", 0, "", nil, "")

	// then
	assert.NoError(t, err1)
	assert.Error(t, err2)
	assert.Implements(t, (*NumericMetric)(nil), metric1)
	assert.Nil(t, metric2)
}

func TestMustNewNumericMetric(t *testing.T) {
	assert.NotPanics(t, func() {
		MustNewNumericMetric("valid", 13.37, "K", nil, "")
	})

	assert.Panics(t, func() {
		MustNewNumericMetric("", 0, "", nil, "")
	})
}

func TestNumericMetric_ToNagiosValue(t *testing.T) {
	// given
	metric1 := MustNewNumericMetric("metric 1", 10, "B", nil, "")
	metric2 := MustNewNumericMetric("metric 2", 13.37, "B", nil, "")
	metric3 := MustNewNumericMetric("metric 3", math.NaN(), "", nil, "")

	// when
	value1 := metric1.ToNagiosValue()
	value2 := metric2.ToNagiosValue()
	value3 := metric3.ToNagiosValue()

	// then
	assert.Equal(t, "10B", value1)
	assert.Equal(t, "13.37B", value2)
	assert.Equal(t, "U", value3)
}

func TestNumericMetric_Value(t *testing.T) {
	// given
	var value = 13.37

	// when
	metric := MustNewNumericMetric("metric", value, "", nil, "")

	// then
	assert.Equal(t, value, metric.Value())
}