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commands_test.go
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commands_test.go
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package expr
import (
"context"
"encoding/json"
"fmt"
"math/rand"
"testing"
"github.com/grafana/grafana-plugin-sdk-go/data"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
ptr "github.com/xorcare/pointer"
"github.com/grafana/grafana/pkg/expr/mathexp"
"github.com/grafana/grafana/pkg/util"
)
func Test_UnmarshalReduceCommand_Settings(t *testing.T) {
var tests = []struct {
name string
querySettings string
isError bool
expectedMapper mathexp.ReduceMapper
}{
{
name: "no mapper function when settings is not specified",
querySettings: ``,
expectedMapper: nil,
},
{
name: "no mapper function when mode is not specified",
querySettings: `, "settings" : { }`,
expectedMapper: nil,
},
{
name: "error when settings is not object",
querySettings: `, "settings" : "drop-nan"`,
isError: true,
},
{
name: "no mapper function when mode is empty",
querySettings: `, "settings" : { "mode": "" }`,
expectedMapper: nil,
},
{
name: "error when mode is not known",
querySettings: `, "settings" : { "mode": "test" }`,
isError: true,
},
{
name: "filterNonNumber function when mode is 'dropNN'",
querySettings: `, "settings" : { "mode": "dropNN" }`,
expectedMapper: mathexp.DropNonNumber{},
},
{
name: "replaceNanWithValue function when mode is 'dropNN'",
querySettings: `, "settings" : { "mode": "replaceNN" , "replaceWithValue": -12 }`,
expectedMapper: mathexp.ReplaceNonNumberWithValue{Value: -12},
},
{
name: "error if mode is 'replaceNN' but field replaceWithValue is not specified",
querySettings: `, "settings" : { "mode": "replaceNN" }`,
isError: true,
},
{
name: "error if mode is 'replaceNN' but field replaceWithValue is not a number",
querySettings: `, "settings" : { "mode": "replaceNN", "replaceWithValue" : "-12" }`,
isError: true,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
q := fmt.Sprintf(`{ "expression" : "$A", "reducer": "sum"%s }`, test.querySettings)
var qmap = make(map[string]interface{})
require.NoError(t, json.Unmarshal([]byte(q), &qmap))
cmd, err := UnmarshalReduceCommand(&rawNode{
RefID: "A",
Query: qmap,
QueryType: "",
TimeRange: TimeRange{},
DataSource: nil,
})
if test.isError {
require.Error(t, err)
return
}
require.NotNil(t, cmd)
require.Equal(t, test.expectedMapper, cmd.seriesMapper)
})
}
}
func TestReduceExecute(t *testing.T) {
varToReduce := util.GenerateShortUID()
cmd, err := NewReduceCommand(util.GenerateShortUID(), randomReduceFunc(), varToReduce, nil)
require.NoError(t, err)
t.Run("should noop if Number", func(t *testing.T) {
var numbers mathexp.Values = []mathexp.Value{
mathexp.GenerateNumber(ptr.Float64(rand.Float64())),
mathexp.GenerateNumber(ptr.Float64(rand.Float64())),
mathexp.GenerateNumber(ptr.Float64(rand.Float64())),
}
vars := map[string]mathexp.Results{
varToReduce: {
Values: numbers,
},
}
execute, err := cmd.Execute(context.Background(), vars)
require.NoError(t, err)
require.Len(t, execute.Values, len(numbers))
for i, value := range execute.Values {
expected := numbers[i]
require.Equal(t, expected.Type(), value.Type())
require.Equal(t, expected.GetLabels(), value.GetLabels())
expectedValue := expected.Value().(*mathexp.Number).GetFloat64Value()
actualValue := value.Value().(*mathexp.Number).GetFloat64Value()
require.Equal(t, expectedValue, actualValue)
}
t.Run("should add warn notices to every frame", func(t *testing.T) {
frames := execute.Values.AsDataFrames("test")
for _, frame := range frames {
require.Len(t, frame.Meta.Notices, 1)
notice := frame.Meta.Notices[0]
require.Equal(t, data.NoticeSeverityWarning, notice.Severity)
}
})
})
t.Run("should return new NoData", func(t *testing.T) {
var noData mathexp.Values = []mathexp.Value{
mathexp.NoData{Frame: data.NewFrame("no data")},
}
vars := map[string]mathexp.Results{
varToReduce: {
Values: noData,
},
}
results, err := cmd.Execute(context.Background(), vars)
require.NoError(t, err)
require.Len(t, results.Values, 1)
v := results.Values[0]
assert.Equal(t, v, mathexp.NoData{}.New())
// should not be able to change the original frame
v.AsDataFrame().Name = "there is still no data"
assert.NotEqual(t, v, mathexp.NoData{}.New())
assert.NotEqual(t, v, noData[0])
assert.Equal(t, "no data", noData[0].AsDataFrame().Name)
})
}
func randomReduceFunc() string {
res := mathexp.GetSupportedReduceFuncs()
return res[rand.Intn(len(res)-1)]
}