prometheus/storage/errors_test.go
Arve Knudsen 3c44ca757d
storage: fix ToError() to return nil for empty partial errors (#18002)
Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>
2026-02-03 16:58:02 +01:00

56 lines
1.9 KiB
Go

// Copyright 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 storage
import (
"fmt"
"testing"
"github.com/stretchr/testify/require"
)
func TestAppendPartialErrorToError(t *testing.T) {
// nil receiver returns nil.
var nilErr *AppendPartialError
require.NoError(t, nilErr.ToError())
// Empty ExemplarErrors returns nil.
emptyErr := &AppendPartialError{}
require.NoError(t, emptyErr.ToError())
// Also test explicitly empty slice.
emptySliceErr := &AppendPartialError{ExemplarErrors: []error{}}
require.NoError(t, emptySliceErr.ToError())
// Non-empty ExemplarErrors returns the error.
nonEmptyErr := &AppendPartialError{ExemplarErrors: []error{ErrOutOfOrderExemplar}}
require.ErrorIs(t, nonEmptyErr.ToError(), nonEmptyErr)
}
func TestErrDuplicateSampleForTimestamp(t *testing.T) {
// All errDuplicateSampleForTimestamp are ErrDuplicateSampleForTimestamp
require.ErrorIs(t, ErrDuplicateSampleForTimestamp, errDuplicateSampleForTimestamp{})
// Same type only is if it has same properties.
err := NewDuplicateFloatErr(1_000, 10, 20)
sameErr := NewDuplicateFloatErr(1_000, 10, 20)
differentErr := NewDuplicateFloatErr(1_001, 30, 40)
require.ErrorIs(t, err, sameErr)
require.NotErrorIs(t, err, differentErr)
// Also works when err is wrapped.
require.ErrorIs(t, fmt.Errorf("failed: %w", err), sameErr)
require.NotErrorIs(t, fmt.Errorf("failed: %w", err), differentErr)
}