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optional_metric_test.go
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optional_metric_test.go
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/*
* 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 TestOptionalMetric_Empty(t *testing.T) {
// when
optionalMetric := OptionalMetric{}
actualMetric, err := optionalMetric.Get()
// then
assert.Error(t, err)
assert.Empty(t, actualMetric)
}
func TestNewOptionalMetric(t *testing.T) {
// given
expectedMetric, _ := NewStringMetric("expected", "", "")
// when
optionalMetric := NewOptionalMetric(expectedMetric)
actualMetric, err := optionalMetric.Get()
// then
assert.NoError(t, err)
assert.Equal(t, true, optionalMetric.Present())
assert.Equal(t, expectedMetric, actualMetric)
}
func TestOptionalMetric_OrElse(t *testing.T) {
// given
expectedMetric, _ := NewStringMetric("expected", "", "")
alternativeMetric, _ := NewStringMetric("alternative", "", "")
// when
optionalMetric1 := NewOptionalMetric(expectedMetric)
optionalMetric2 := OptionalMetric{}
// then
assert.Equal(t, expectedMetric, optionalMetric1.OrElse(alternativeMetric))
assert.Equal(t, alternativeMetric, optionalMetric2.OrElse(alternativeMetric))
}
func TestOptionalMetric_Set(t *testing.T) {
// given
metric1, _ := NewStringMetric("metric 1", "", "")
metric2, _ := NewStringMetric("metric 2", "", "")
alternativeMetric, _ := NewStringMetric("alternative", "", "")
// when
optionalMetric := NewOptionalMetric(metric1)
optionalMetric.Set(metric2)
// then
assert.Equal(t, true, optionalMetric.Present())
assert.Equal(t, metric2, optionalMetric.OrElse(alternativeMetric))
}
func TestOptionalMetric_If(t *testing.T) {
// given
var actualMetricPtr *Metric
var expectedMetric Metric
expectedMetric, _ = NewStringMetric("expected", "", "")
// when
optionalMetric := NewOptionalMetric(expectedMetric)
optionalMetric.If(func(metric Metric) {
actualMetricPtr = &metric
})
// then
assert.Equal(t, &expectedMetric, actualMetricPtr)
}