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// SPDX-License-Identifier: GPL-3.0-or-later
package example
import (
"os"
"testing"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
var (
dataConfigJSON, _ = os.ReadFile("testdata/config.json")
dataConfigYAML, _ = os.ReadFile("testdata/config.yaml")
)
func Test_testDataIsValid(t *testing.T) {
for name, data := range map[string][]byte{
"dataConfigJSON": dataConfigJSON,
"dataConfigYAML": dataConfigYAML,
} {
require.NotNil(t, data, name)
}
}
func TestExample_ConfigurationSerialize(t *testing.T) {
module.TestConfigurationSerialize(t, &Example{}, dataConfigJSON, dataConfigYAML)
}
func TestNew(t *testing.T) {
// We want to ensure that module is a reference type, nothing more.
assert.IsType(t, (*Example)(nil), New())
}
func TestExample_Init(t *testing.T) {
// 'Init() bool' initializes the module with an appropriate config, so to test it we need:
// - provide the config.
// - set module.Config field with the config.
// - call Init() and compare its return value with the expected value.
// 'test' map contains different test cases.
tests := map[string]struct {
config Config
wantFail bool
}{
"success on default config": {
config: New().Config,
},
"success when only 'charts' set": {
config: Config{
Charts: ConfigCharts{
Num: 1,
Dims: 2,
},
},
},
"success when only 'hidden_charts' set": {
config: Config{
HiddenCharts: ConfigCharts{
Num: 1,
Dims: 2,
},
},
},
"success when 'charts' and 'hidden_charts' set": {
config: Config{
Charts: ConfigCharts{
Num: 1,
Dims: 2,
},
HiddenCharts: ConfigCharts{
Num: 1,
Dims: 2,
},
},
},
"fails when 'charts' and 'hidden_charts' set, but 'num' == 0": {
wantFail: true,
config: Config{
Charts: ConfigCharts{
Num: 0,
Dims: 2,
},
HiddenCharts: ConfigCharts{
Num: 0,
Dims: 2,
},
},
},
"fails when only 'charts' set, 'num' > 0, but 'dimensions' == 0": {
wantFail: true,
config: Config{
Charts: ConfigCharts{
Num: 1,
Dims: 0,
},
},
},
"fails when only 'hidden_charts' set, 'num' > 0, but 'dimensions' == 0": {
wantFail: true,
config: Config{
HiddenCharts: ConfigCharts{
Num: 1,
Dims: 0,
},
},
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
example := New()
example.Config = test.config
if test.wantFail {
assert.Error(t, example.Init())
} else {
assert.NoError(t, example.Init())
}
})
}
}
func TestExample_Check(t *testing.T) {
// 'Check() bool' reports whether the module is able to collect any data, so to test it we need:
// - provide the module with a specific config.
// - initialize the module (call Init()).
// - call Check() and compare its return value with the expected value.
// 'test' map contains different test cases.
tests := map[string]struct {
prepare func() *Example
wantFail bool
}{
"success on default": {prepare: prepareExampleDefault},
"success when only 'charts' set": {prepare: prepareExampleOnlyCharts},
"success when only 'hidden_charts' set": {prepare: prepareExampleOnlyHiddenCharts},
"success when 'charts' and 'hidden_charts' set": {prepare: prepareExampleChartsAndHiddenCharts},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
example := test.prepare()
require.NoError(t, example.Init())
if test.wantFail {
assert.Error(t, example.Check())
} else {
assert.NoError(t, example.Check())
}
})
}
}
func TestExample_Charts(t *testing.T) {
// We want to ensure that initialized module does not return 'nil'.
// If it is not 'nil' we are ok.
// 'test' map contains different test cases.
tests := map[string]struct {
prepare func(t *testing.T) *Example
wantNil bool
}{
"not initialized collector": {
wantNil: true,
prepare: func(t *testing.T) *Example {
return New()
},
},
"initialized collector": {
prepare: func(t *testing.T) *Example {
example := New()
require.NoError(t, example.Init())
return example
},
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
example := test.prepare(t)
if test.wantNil {
assert.Nil(t, example.Charts())
} else {
assert.NotNil(t, example.Charts())
}
})
}
}
func TestExample_Cleanup(t *testing.T) {
// Since this module has nothing to clean up,
// we want just to ensure that Cleanup() not panics.
assert.NotPanics(t, New().Cleanup)
}
func TestExample_Collect(t *testing.T) {
// 'Collect() map[string]int64' returns collected data, so to test it we need:
// - provide the module with a specific config.
// - initialize the module (call Init()).
// - call Collect() and compare its return value with the expected value.
// 'test' map contains different test cases.
tests := map[string]struct {
prepare func() *Example
wantCollected map[string]int64
}{
"default config": {
prepare: prepareExampleDefault,
wantCollected: map[string]int64{
"random_0_random0": 1,
"random_0_random1": -1,
"random_0_random2": 1,
"random_0_random3": -1,
},
},
"only 'charts' set": {
prepare: prepareExampleOnlyCharts,
wantCollected: map[string]int64{
"random_0_random0": 1,
"random_0_random1": -1,
"random_0_random2": 1,
"random_0_random3": -1,
"random_0_random4": 1,
"random_1_random0": 1,
"random_1_random1": -1,
"random_1_random2": 1,
"random_1_random3": -1,
"random_1_random4": 1,
},
},
"only 'hidden_charts' set": {
prepare: prepareExampleOnlyHiddenCharts,
wantCollected: map[string]int64{
"hidden_random_0_random0": 1,
"hidden_random_0_random1": -1,
"hidden_random_0_random2": 1,
"hidden_random_0_random3": -1,
"hidden_random_0_random4": 1,
"hidden_random_1_random0": 1,
"hidden_random_1_random1": -1,
"hidden_random_1_random2": 1,
"hidden_random_1_random3": -1,
"hidden_random_1_random4": 1,
},
},
"'charts' and 'hidden_charts' set": {
prepare: prepareExampleChartsAndHiddenCharts,
wantCollected: map[string]int64{
"hidden_random_0_random0": 1,
"hidden_random_0_random1": -1,
"hidden_random_0_random2": 1,
"hidden_random_0_random3": -1,
"hidden_random_0_random4": 1,
"hidden_random_1_random0": 1,
"hidden_random_1_random1": -1,
"hidden_random_1_random2": 1,
"hidden_random_1_random3": -1,
"hidden_random_1_random4": 1,
"random_0_random0": 1,
"random_0_random1": -1,
"random_0_random2": 1,
"random_0_random3": -1,
"random_0_random4": 1,
"random_1_random0": 1,
"random_1_random1": -1,
"random_1_random2": 1,
"random_1_random3": -1,
"random_1_random4": 1,
},
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
example := test.prepare()
require.NoError(t, example.Init())
collected := example.Collect()
assert.Equal(t, test.wantCollected, collected)
ensureCollectedHasAllChartsDimsVarsIDs(t, example, collected)
})
}
}
func ensureCollectedHasAllChartsDimsVarsIDs(t *testing.T, e *Example, collected map[string]int64) {
for _, chart := range *e.Charts() {
if chart.Obsolete {
continue
}
for _, dim := range chart.Dims {
_, ok := collected[dim.ID]
assert.Truef(t, ok,
"collected metrics has no data for dim '%s' chart '%s'", dim.ID, chart.ID)
}
for _, v := range chart.Vars {
_, ok := collected[v.ID]
assert.Truef(t, ok,
"collected metrics has no data for var '%s' chart '%s'", v.ID, chart.ID)
}
}
}
func prepareExampleDefault() *Example {
return prepareExample(New().Config)
}
func prepareExampleOnlyCharts() *Example {
return prepareExample(Config{
Charts: ConfigCharts{
Num: 2,
Dims: 5,
},
})
}
func prepareExampleOnlyHiddenCharts() *Example {
return prepareExample(Config{
HiddenCharts: ConfigCharts{
Num: 2,
Dims: 5,
},
})
}
func prepareExampleChartsAndHiddenCharts() *Example {
return prepareExample(Config{
Charts: ConfigCharts{
Num: 2,
Dims: 5,
},
HiddenCharts: ConfigCharts{
Num: 2,
Dims: 5,
},
})
}
func prepareExample(cfg Config) *Example {
example := New()
example.Config = cfg
example.randInt = func() int64 { return 1 }
return example
}
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