mirror of
https://github.com/prometheus/prometheus
synced 2024-12-29 02:02:17 +00:00
81 lines
2.4 KiB
Go
81 lines
2.4 KiB
Go
// Copyright 2015 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package promql
|
|
|
|
import (
|
|
"context"
|
|
"math"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
|
|
"github.com/prometheus/prometheus/pkg/labels"
|
|
"github.com/prometheus/prometheus/pkg/timestamp"
|
|
"github.com/prometheus/prometheus/promql/parser"
|
|
"github.com/prometheus/prometheus/util/teststorage"
|
|
)
|
|
|
|
func TestDeriv(t *testing.T) {
|
|
// https://github.com/prometheus/prometheus/issues/2674#issuecomment-315439393
|
|
// This requires more precision than the usual test system offers,
|
|
// so we test it by hand.
|
|
storage := teststorage.New(t)
|
|
defer storage.Close()
|
|
opts := EngineOpts{
|
|
Logger: nil,
|
|
Reg: nil,
|
|
MaxSamples: 10000,
|
|
Timeout: 10 * time.Second,
|
|
}
|
|
engine := NewEngine(opts)
|
|
|
|
a := storage.Appender(context.Background())
|
|
|
|
metric := labels.FromStrings("__name__", "foo")
|
|
a.Append(0, metric, 1493712816939, 1.0)
|
|
a.Append(0, metric, 1493712846939, 1.0)
|
|
|
|
require.NoError(t, a.Commit())
|
|
|
|
query, err := engine.NewInstantQuery(storage, "deriv(foo[30m])", timestamp.Time(1493712846939))
|
|
require.NoError(t, err)
|
|
|
|
result := query.Exec(context.Background())
|
|
require.NoError(t, result.Err)
|
|
|
|
vec, _ := result.Vector()
|
|
require.Equal(t, 1, len(vec), "Expected 1 result, got %d", len(vec))
|
|
require.Equal(t, 0.0, vec[0].V, "Expected 0.0 as value, got %f", vec[0].V)
|
|
}
|
|
|
|
func TestFunctionList(t *testing.T) {
|
|
// Test that Functions and parser.Functions list the same functions.
|
|
for i := range FunctionCalls {
|
|
_, ok := parser.Functions[i]
|
|
require.True(t, ok, "function %s exists in promql package, but not in parser package", i)
|
|
}
|
|
|
|
for i := range parser.Functions {
|
|
_, ok := FunctionCalls[i]
|
|
require.True(t, ok, "function %s exists in parser package, but not in promql package", i)
|
|
}
|
|
}
|
|
|
|
func TestKahanSum(t *testing.T) {
|
|
vals := []float64{1.0, math.Pow(10, 100), 1.0, -1 * math.Pow(10, 100)}
|
|
expected := 2.0
|
|
require.Equal(t, expected, kahanSum(vals))
|
|
}
|