refactor(task): make setting now on every execution

By switching to passing a spec it allows us more control

task/backend/executor/executor.go

@@ -5,6 +5,7 @@ package executor
 import (
 	"context"
 	"sync"
+	"time"
 
 	"github.com/influxdata/influxdb/logger"
 	"github.com/influxdata/platform/query"
@@ -116,7 +117,13 @@ func (p *syncRunPromise) finish(res *runResult, err error) {
 }
 
 func (p *syncRunPromise) doQuery() {
-	it, err := p.svc.QueryWithCompile(p.ctx, p.t.Org, p.t.Script)
+	spec, err := query.Compile(p.ctx, p.t.Script, time.Unix(p.qr.Now, 0))
+	if err != nil {
+		p.finish(nil, err)
+		return
+	}
+
+	it, err := p.svc.Query(p.ctx, p.t.Org, spec)
 	if err != nil {
 		// Assume the error should not be part of the runResult.
 		p.finish(nil, err)
@@ -164,7 +171,12 @@ func (e *asyncQueryServiceExecutor) Execute(ctx context.Context, run backend.Que
 		return nil, err
 	}
 
-	q, err := e.svc.QueryWithCompile(ctx, t.Org, t.Script)
+	spec, err := query.Compile(ctx, t.Script, time.Unix(run.Now, 0))
+	if err != nil {
+		return nil, err
+	}
+
+	q, err := e.svc.Query(ctx, t.Org, spec)
 	if err != nil {
 		return nil, err
 	}

task/backend/executor/executor_test.go

@@ -2,6 +2,7 @@ package executor_test
 
 import (
 	"context"
+	"encoding/json"
 	"errors"
 	"math"
 	"reflect"
@@ -27,12 +28,43 @@ type fakeQueryService struct {
 
 var _ query.AsyncQueryService = (*fakeQueryService)(nil)
 
+func makeSpec(q string) *query.Spec {
+	qs, err := query.Compile(context.Background(), q, time.Unix(123, 0))
+	if err != nil {
+		panic(err)
+	}
+	return qs
+}
+
+func makeSpecString(q *query.Spec) string {
+	b, err := json.Marshal(q)
+	if err != nil {
+		panic(err)
+	}
+	return string(b)
+}
+
 func newFakeQueryService() *fakeQueryService {
 	return &fakeQueryService{queries: make(map[string]*fakeQuery)}
 }
 
-func (s *fakeQueryService) Query(ctx context.Context, orgID platform.ID, query *query.Spec) (query.Query, error) {
-	panic("not implemented")
+func (s *fakeQueryService) Query(ctx context.Context, orgID platform.ID, q *query.Spec) (query.Query, error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.queryErr != nil {
+		err := s.queryErr
+		s.queryErr = nil
+		return nil, err
+	}
+
+	fq := &fakeQuery{
+		wait:  make(chan struct{}),
+		ready: make(chan map[string]query.Result),
+	}
+	s.queries[makeSpecString(q)] = fq
+	go fq.run()
+
+	return fq, nil
 }
 
 func (s *fakeQueryService) QueryWithCompile(ctx context.Context, orgID platform.ID, q string) (query.Query, error) {
@@ -48,7 +80,7 @@ func (s *fakeQueryService) QueryWithCompile(ctx context.Context, orgID platform.
 		wait:  make(chan struct{}),
 		ready: make(chan map[string]query.Result),
 	}
-	s.queries[q] = fq
+	s.queries[makeSpecString(makeSpec(q))] = fq
 	go fq.run()
 
 	return fq, nil
@@ -60,8 +92,9 @@ func (s *fakeQueryService) SucceedQuery(script string) {
 	defer s.mu.Unlock()
 
 	// Unblock the query.
-	close(s.queries[script].wait)
-	delete(s.queries, script)
+	spec := makeSpecString(makeSpec(script))
+	close(s.queries[spec].wait)
+	delete(s.queries, spec)
 }
 
 // FailQuery closes the running query's Ready channel and sets its error to the given value.
@@ -70,9 +103,10 @@ func (s *fakeQueryService) FailQuery(script string, forced error) {
 	defer s.mu.Unlock()
 
 	// Unblock the query.
-	s.queries[script].forcedError = forced
-	close(s.queries[script].wait)
-	delete(s.queries, script)
+	spec := makeSpecString(makeSpec(script))
+	s.queries[spec].forcedError = forced
+	close(s.queries[spec].wait)
+	delete(s.queries, spec)
 }
 
 // FailNextQuery causes the next call to QueryWithCompile to return the given error.
@@ -85,13 +119,14 @@ func (s *fakeQueryService) FailNextQuery(forced error) {
 // because the execution starts on a separate goroutine.
 func (s *fakeQueryService) WaitForQueryLive(t *testing.T, script string) {
 	const attempts = 10
+	spec := makeSpecString(makeSpec(script))
 	for i := 0; i < attempts; i++ {
 		if i != 0 {
 			time.Sleep(5 * time.Millisecond)
 		}
 
 		s.mu.Lock()
-		_, ok := s.queries[script]
+		_, ok := s.queries[spec]
 		s.mu.Unlock()
 		if ok {
 			return