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watchScalingObject_test.go
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watchScalingObject_test.go
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package scaler
import (
"fmt"
"testing"
"github.com/golang/mock/gomock"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
mock_metrics "github.com/thomasobenaus/sokar/test/mocks/metrics"
mock_scaler "github.com/thomasobenaus/sokar/test/mocks/scaler"
)
func TestCountMeetsExpectations(t *testing.T) {
desired := optionalValue{value: 1, isKnown: true}
asExpected, expected := countMeetsExpectations(1, 1, 2, desired)
assert.True(t, asExpected)
assert.Equal(t, uint(1), expected)
// min violated
asExpected, expected = countMeetsExpectations(0, 1, 2, desired)
assert.False(t, asExpected)
assert.Equal(t, uint(1), expected)
// max violated
asExpected, expected = countMeetsExpectations(3, 1, 2, desired)
assert.False(t, asExpected)
assert.Equal(t, uint(2), expected)
// no desired
asExpected, expected = countMeetsExpectations(1, 1, 2, optionalValue{isKnown: false})
assert.True(t, asExpected)
assert.Equal(t, uint(1), expected, "Expected to stay at current count since desired is nil.")
// desired over max
desired.setValue(10)
asExpected, expected = countMeetsExpectations(3, 1, 2, desired)
assert.False(t, asExpected)
assert.Equal(t, uint(2), expected)
// desired under min
desired.setValue(0)
asExpected, expected = countMeetsExpectations(3, 1, 2, desired)
assert.False(t, asExpected)
assert.Equal(t, uint(2), expected)
}
func TestEnsureScalingObjectCount_NoScale(t *testing.T) {
mockCtrl := gomock.NewController(t)
defer mockCtrl.Finish()
metrics, _ := NewMockedMetrics(mockCtrl)
scaTgt := mock_scaler.NewMockScalingTarget(mockCtrl)
sObjName := "any"
sObj := ScalingObject{Name: sObjName, MinCount: 1, MaxCount: 5}
scaler, err := New(scaTgt, sObj, metrics)
require.NoError(t, err)
require.NotNil(t, scaler)
// Error in scaling target
scaTgt.EXPECT().GetScalingObjectCount(sObjName).Return(uint(0), fmt.Errorf("Unable to determine scalingObject count"))
err = scaler.ensureScalingObjectCount()
assert.Error(t, err)
// No scale
scaler.desiredScale.setValue(1)
scaTgt.EXPECT().GetScalingObjectCount(sObjName).Return(uint(1), nil)
err = scaler.ensureScalingObjectCount()
assert.NoError(t, err)
}
func TestEnsureScalingObjectCount_MinViolated(t *testing.T) {
mockCtrl := gomock.NewController(t)
defer mockCtrl.Finish()
metrics, mocks := NewMockedMetrics(mockCtrl)
scaTgt := mock_scaler.NewMockScalingTarget(mockCtrl)
sObjName := "any"
sObj := ScalingObject{Name: sObjName, MinCount: 1, MaxCount: 5}
scaler, err := New(scaTgt, sObj, metrics)
require.NoError(t, err)
require.NotNil(t, scaler)
// Scale - min violated
scaler.desiredScale.setValue(1)
scalingTicketCounter := mock_metrics.NewMockCounter(mockCtrl)
scalingTicketCounter.EXPECT().Inc()
mocks.scalingTicketCount.EXPECT().WithLabelValues("added").Return(scalingTicketCounter)
scaTgt.EXPECT().GetScalingObjectCount("any").Return(uint(0), nil)
err = scaler.ensureScalingObjectCount()
assert.NoError(t, err)
}
func TestEnsureScalingObjectCount_MaxViolated(t *testing.T) {
mockCtrl := gomock.NewController(t)
defer mockCtrl.Finish()
metrics, mocks := NewMockedMetrics(mockCtrl)
scaTgt := mock_scaler.NewMockScalingTarget(mockCtrl)
sObjName := "any"
sObj := ScalingObject{Name: sObjName, MinCount: 1, MaxCount: 5}
scaler, err := New(scaTgt, sObj, metrics)
require.NoError(t, err)
require.NotNil(t, scaler)
// Scale - max violated
scaler.desiredScale.setValue(1)
scalingTicketCounter := mock_metrics.NewMockCounter(mockCtrl)
scalingTicketCounter.EXPECT().Inc()
mocks.scalingTicketCount.EXPECT().WithLabelValues("added").Return(scalingTicketCounter)
scaTgt.EXPECT().GetScalingObjectCount(sObjName).Return(uint(10), nil)
err = scaler.ensureScalingObjectCount()
assert.NoError(t, err)
}