loki/integration/loki_simple_scalable_test.go

package integration

import (
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/grafana/loki/integration/client"
	"github.com/grafana/loki/integration/cluster"
)

func TestSimpleScalableIngestQuery(t *testing.T) {
	clu := cluster.New()
	defer func() {
		assert.NoError(t, clu.Cleanup())
	}()

	var (
		tRead = clu.AddComponent(
			"read",
			"-target=read",
		)
		tWrite = clu.AddComponent(
			"write",
			"-target=write",
		)
	)

	require.NoError(t, clu.Run())

	tenantID := randStringRunes()

	now := time.Now()
	cliWrite := client.New(tenantID, "", tWrite.HTTPURL().String())
	cliWrite.Now = now
	cliRead := client.New(tenantID, "", tRead.HTTPURL().String())
	cliRead.Now = now

	t.Run("ingest logs", func(t *testing.T) {
		// ingest some log lines
		require.NoError(t, cliWrite.PushLogLineWithTimestamp("lineA", now.Add(-45*time.Minute), map[string]string{"job": "fake"}))
		require.NoError(t, cliWrite.PushLogLineWithTimestamp("lineB", now.Add(-45*time.Minute), map[string]string{"job": "fake"}))

		require.NoError(t, cliWrite.PushLogLine("lineC", map[string]string{"job": "fake"}))
		require.NoError(t, cliWrite.PushLogLine("lineD", map[string]string{"job": "fake"}))
	})

	t.Run("query", func(t *testing.T) {
		resp, err := cliRead.RunRangeQuery(`{job="fake"}`)
		require.NoError(t, err)
		assert.Equal(t, "streams", resp.Data.ResultType)

		var lines []string
		for _, stream := range resp.Data.Stream {
			for _, val := range stream.Values {
				lines = append(lines, val[1])
			}
		}
		assert.ElementsMatch(t, []string{"lineA", "lineB", "lineC", "lineD"}, lines)
	})

	t.Run("label-names", func(t *testing.T) {
		resp, err := cliRead.LabelNames()
		require.NoError(t, err)
		assert.ElementsMatch(t, []string{"job"}, resp)
	})

	t.Run("label-values", func(t *testing.T) {
		resp, err := cliRead.LabelValues("job")
		require.NoError(t, err)
		assert.ElementsMatch(t, []string{"fake"}, resp)
	})
}