Golang deep.Equal函數代碼示例

// Ensure a cursor with a single ref value can be converted into an iterator.
func TestFloatCursorIterator_SingleValue(t *testing.T) {
	cur := NewCursor([]CursorItem{
		{Key: 0, Value: float64(100)},
		{Key: 3, Value: float64(200)},
	}, true)

	opt := influxql.IteratorOptions{
		Expr:      &influxql.VarRef{Val: "value"},
		Ascending: true,
		StartTime: influxql.MinTime,
		EndTime:   influxql.MaxTime,
	}
	itr := tsdb.NewFloatCursorIterator("series0", map[string]string{"host": "serverA"}, cur, opt)
	defer itr.Close()

	if p := itr.Next(); !deep.Equal(p, &influxql.FloatPoint{
		Name:  "series0",
		Time:  0,
		Value: float64(100),
	}) {
		t.Fatalf("unexpected point(0): %s", spew.Sdump(p))
	}

	if p := itr.Next(); !deep.Equal(p, &influxql.FloatPoint{
		Name:  "series0",
		Time:  3,
		Value: float64(200),
	}) {
		t.Fatalf("unexpected point(1): %s", spew.Sdump(p))
	}

	if p := itr.Next(); p != nil {
		t.Fatalf("expected eof, got: %s", spew.Sdump(p))
	}
}

// Ensure shards can create iterators.
func TestShards_CreateIterator(t *testing.T) {
	s := MustOpenStore()
	defer s.Close()

	// Create shard #0 with data.
	s.MustCreateShardWithData("db0", "rp0", 0,
		`cpu,host=serverA value=1  0`,
		`cpu,host=serverA value=2 10`,
		`cpu,host=serverB value=3 20`,
	)

	// Create shard #1 with data.
	s.MustCreateShardWithData("db0", "rp0", 1,
		`cpu,host=serverA value=1 30`,
		`mem,host=serverA value=2 40`, // skip: wrong source
		`cpu,host=serverC value=3 60`,
	)

	// Create iterator.
	itr, err := tsdb.Shards(s.Shards([]uint64{0, 1})).CreateIterator(influxql.IteratorOptions{
		Expr:       influxql.MustParseExpr(`value`),
		Dimensions: []string{"host"},
		Sources:    []influxql.Source{&influxql.Measurement{Name: "cpu"}},
		Ascending:  true,
		StartTime:  influxql.MinTime,
		EndTime:    influxql.MaxTime,
	})
	if err != nil {
		t.Fatal(err)
	}
	defer itr.Close()
	fitr := itr.(influxql.FloatIterator)

	// Read values from iterator. The host=serverA points should come first.
	if p := fitr.Next(); !deep.Equal(p, &influxql.FloatPoint{Name: "cpu", Tags: ParseTags("host=serverA"), Time: time.Unix(0, 0).UnixNano(), Value: 1}) {
		t.Fatalf("unexpected point(0): %s", spew.Sdump(p))
	} else if p = fitr.Next(); !deep.Equal(p, &influxql.FloatPoint{Name: "cpu", Tags: ParseTags("host=serverA"), Time: time.Unix(10, 0).UnixNano(), Value: 2}) {
		t.Fatalf("unexpected point(1): %s", spew.Sdump(p))
	} else if p = fitr.Next(); !deep.Equal(p, &influxql.FloatPoint{Name: "cpu", Tags: ParseTags("host=serverA"), Time: time.Unix(30, 0).UnixNano(), Value: 1}) {
		t.Fatalf("unexpected point(2): %s", spew.Sdump(p))
	}

	// Next the host=serverB point.
	if p := fitr.Next(); !deep.Equal(p, &influxql.FloatPoint{Name: "cpu", Tags: ParseTags("host=serverB"), Time: time.Unix(20, 0).UnixNano(), Value: 3}) {
		t.Fatalf("unexpected point(3): %s", spew.Sdump(p))
	}

	// And finally the host=serverC point.
	if p := fitr.Next(); !deep.Equal(p, &influxql.FloatPoint{Name: "cpu", Tags: ParseTags("host=serverC"), Time: time.Unix(60, 0).UnixNano(), Value: 3}) {
		t.Fatalf("unexpected point(4): %s", spew.Sdump(p))
	}

	// Then an EOF should occur.
	if p := fitr.Next(); p != nil {
		t.Fatalf("expected eof, got: %s", spew.Sdump(p))
	}
}

// Ensure a shard can create iterators for its underlying data.
func TestShard_CreateIterator(t *testing.T) {
	sh := MustOpenShard()
	defer sh.Close()

	sh.MustWritePointsString(`
cpu,host=serverA,region=uswest value=100 0
cpu,host=serverA,region=uswest value=50,val2=5  10
cpu,host=serverB,region=uswest value=25  0
`)

	// Create iterator.
	itr, err := sh.CreateIterator(influxql.IteratorOptions{
		Expr:       influxql.MustParseExpr(`value`),
		Aux:        []string{"val2"},
		Dimensions: []string{"host"},
		Sources:    []influxql.Source{&influxql.Measurement{Name: "cpu"}},
		Ascending:  true,
		StartTime:  influxql.MinTime,
		EndTime:    influxql.MaxTime,
	})
	if err != nil {
		t.Fatal(err)
	}
	defer itr.Close()
	fitr := itr.(influxql.FloatIterator)

	// Read values from iterator.
	if p := fitr.Next(); !deep.Equal(p, &influxql.FloatPoint{
		Name:  "cpu",
		Tags:  influxql.NewTags(map[string]string{"host": "serverA"}),
		Time:  time.Unix(0, 0).UnixNano(),
		Value: 100,
		Aux:   []interface{}{(*float64)(nil)},
	}) {
		t.Fatalf("unexpected point(0): %s", spew.Sdump(p))
	}

	if p := fitr.Next(); !deep.Equal(p, &influxql.FloatPoint{
		Name:  "cpu",
		Tags:  influxql.NewTags(map[string]string{"host": "serverA"}),
		Time:  time.Unix(10, 0).UnixNano(),
		Value: 50,
		Aux:   []interface{}{float64(5)},
	}) {
		t.Fatalf("unexpected point(1): %s", spew.Sdump(p))
	}

	if p := fitr.Next(); !deep.Equal(p, &influxql.FloatPoint{
		Name:  "cpu",
		Tags:  influxql.NewTags(map[string]string{"host": "serverB"}),
		Time:  time.Unix(0, 0).UnixNano(),
		Value: 25,
		Aux:   []interface{}{math.NaN()},
	}) {
		t.Fatalf("unexpected point(1): %s", spew.Sdump(p))
	}
}

// Ensure engine can create an iterator with auxilary fields.
func TestEngine_CreateIterator_Aux(t *testing.T) {
	t.Parallel()

	e := MustOpenEngine()
	defer e.Close()

	e.Index().CreateMeasurementIndexIfNotExists("cpu")
	e.MeasurementFields("cpu").CreateFieldIfNotExists("value", influxql.Float, false)
	e.MeasurementFields("cpu").CreateFieldIfNotExists("F", influxql.Float, false)
	si := e.Index().CreateSeriesIndexIfNotExists("cpu", tsdb.NewSeries("cpu,host=A", models.NewTags(map[string]string{"host": "A"})))
	si.AssignShard(1)

	if err := e.WritePointsString(
		`cpu,host=A value=1.1 1000000000`,
		`cpu,host=A F=100 1000000000`,
		`cpu,host=A value=1.2 2000000000`,
		`cpu,host=A value=1.3 3000000000`,
		`cpu,host=A F=200 3000000000`,
	); err != nil {
		t.Fatalf("failed to write points: %s", err.Error())
	}

	itr, err := e.CreateIterator(influxql.IteratorOptions{
		Expr:       influxql.MustParseExpr(`value`),
		Aux:        []influxql.VarRef{{Val: "F"}},
		Dimensions: []string{"host"},
		Sources:    []influxql.Source{&influxql.Measurement{Name: "cpu"}},
		StartTime:  influxql.MinTime,
		EndTime:    influxql.MaxTime,
		Ascending:  true,
	})
	if err != nil {
		t.Fatal(err)
	}
	fitr := itr.(influxql.FloatIterator)

	if p, err := fitr.Next(); err != nil {
		t.Fatalf("unexpected error(0): %v", err)
	} else if !deep.Equal(p, &influxql.FloatPoint{Name: "cpu", Tags: ParseTags("host=A"), Time: 1000000000, Value: 1.1, Aux: []interface{}{float64(100)}}) {
		t.Fatalf("unexpected point(0): %v", p)
	}
	if p, err := fitr.Next(); err != nil {
		t.Fatalf("unexpected error(1): %v", err)
	} else if !deep.Equal(p, &influxql.FloatPoint{Name: "cpu", Tags: ParseTags("host=A"), Time: 2000000000, Value: 1.2, Aux: []interface{}{(*float64)(nil)}}) {
		t.Fatalf("unexpected point(1): %v", p)
	}
	if p, err := fitr.Next(); err != nil {
		t.Fatalf("unexpected error(2): %v", err)
	} else if !deep.Equal(p, &influxql.FloatPoint{Name: "cpu", Tags: ParseTags("host=A"), Time: 3000000000, Value: 1.3, Aux: []interface{}{float64(200)}}) {
		t.Fatalf("unexpected point(2): %v", p)
	}
	if p, err := fitr.Next(); err != nil {
		t.Fatalf("expected eof, got error: %v", err)
	} else if p != nil {
		t.Fatalf("expected eof: %v", p)
	}
}

// Ensure the emitter can group iterators together into rows.
func TestEmitter_Emit(t *testing.T) {
	// Build an emitter that pulls from two iterators.
	e := influxql.NewEmitter([]influxql.Iterator{
		&FloatIterator{Points: []influxql.FloatPoint{
			{Name: "cpu", Tags: ParseTags("region=west"), Time: 0, Value: 1},
			{Name: "cpu", Tags: ParseTags("region=west"), Time: 1, Value: 2},
		}},
		&FloatIterator{Points: []influxql.FloatPoint{
			{Name: "cpu", Tags: ParseTags("region=west"), Time: 1, Value: 4},
			{Name: "cpu", Tags: ParseTags("region=north"), Time: 0, Value: 4},
			{Name: "mem", Time: 4, Value: 5},
		}},
	}, true)
	e.Columns = []string{"col1", "col2"}

	// Verify the cpu region=west is emitted first.
	if row := e.Emit(); !deep.Equal(row, &models.Row{
		Name:    "cpu",
		Tags:    map[string]string{"region": "west"},
		Columns: []string{"col1", "col2"},
		Values: [][]interface{}{
			{time.Unix(0, 0).UTC(), float64(1), nil},
			{time.Unix(0, 1).UTC(), float64(2), float64(4)},
		},
	}) {
		t.Fatalf("unexpected row(0): %s", spew.Sdump(row))
	}

	// Verify the cpu region=north is emitted next.
	if row := e.Emit(); !deep.Equal(row, &models.Row{
		Name:    "cpu",
		Tags:    map[string]string{"region": "north"},
		Columns: []string{"col1", "col2"},
		Values: [][]interface{}{
			{time.Unix(0, 0).UTC(), nil, float64(4)},
		},
	}) {
		t.Fatalf("unexpected row(1): %s", spew.Sdump(row))
	}

	// Verify the mem series is emitted last.
	if row := e.Emit(); !deep.Equal(row, &models.Row{
		Name:    "mem",
		Columns: []string{"col1", "col2"},
		Values: [][]interface{}{
			{time.Unix(0, 4).UTC(), nil, float64(5)},
		},
	}) {
		t.Fatalf("unexpected row(2): %s", spew.Sdump(row))
	}

	// Verify EOF.
	if row := e.Emit(); row != nil {
		t.Fatalf("unexpected eof: %s", spew.Sdump(row))
	}
}

// Ensure limit iterator returns a subset of points.
func TestLimitIterator(t *testing.T) {
	itr := influxql.NewLimitIterator(
		&FloatIterator{Points: []influxql.FloatPoint{
			{Time: 0, Value: 0},
			{Time: 1, Value: 1},
			{Time: 2, Value: 2},
			{Time: 3, Value: 3},
		}},
		influxql.IteratorOptions{
			Limit:     2,
			Offset:    1,
			StartTime: influxql.MinTime,
			EndTime:   influxql.MaxTime,
		},
	)

	if a, err := (Iterators{itr}).ReadAll(); err != nil {
		t.Fatalf("unexpected error: %s", err)
	} else if !deep.Equal(a, [][]influxql.Point{
		{&influxql.FloatPoint{Time: 1, Value: 1}},
		{&influxql.FloatPoint{Time: 2, Value: 2}},
	}) {
		t.Fatalf("unexpected points: %s", spew.Sdump(a))
	}
}

// Ensure limit iterators work with limit and offset.
func TestLimitIterator_Boolean(t *testing.T) {
	input := &BooleanIterator{Points: []influxql.BooleanPoint{
		{Name: "cpu", Time: 0, Value: true},
		{Name: "cpu", Time: 5, Value: false},
		{Name: "cpu", Time: 10, Value: true},
		{Name: "mem", Time: 5, Value: false},
		{Name: "mem", Time: 7, Value: true},
	}}

	itr := influxql.NewLimitIterator(input, influxql.IteratorOptions{
		Limit:  1,
		Offset: 1,
	})

	if a := Iterators([]influxql.Iterator{itr}).ReadAll(); !deep.Equal(a, [][]influxql.Point{
		{&influxql.BooleanPoint{Name: "cpu", Time: 5, Value: false}},
		{&influxql.BooleanPoint{Name: "mem", Time: 7, Value: true}},
	}) {
		t.Fatalf("unexpected points: %s", spew.Sdump(a))
	}

	if !input.Closed {
		t.Error("iterator not closed")
	}
}

// Ensure that a float iterator can be created for a last() call.
func TestCallIterator_Last_Float(t *testing.T) {
	itr, _ := influxql.NewCallIterator(
		&FloatIterator{Points: []influxql.FloatPoint{
			{Time: 1, Value: 11, Tags: ParseTags("region=us-west,host=hostB")},
			{Time: 2, Value: 10, Tags: ParseTags("region=us-east,host=hostA")},
			{Time: 0, Value: 15, Tags: ParseTags("region=us-east,host=hostA")},
			{Time: 1, Value: 10, Tags: ParseTags("region=us-west,host=hostA")},

			{Time: 6, Value: 20, Tags: ParseTags("region=us-east,host=hostA")},

			{Time: 23, Value: 8, Tags: ParseTags("region=us-west,host=hostB")},
		}},
		influxql.IteratorOptions{
			Expr:       MustParseExpr(`last("value")`),
			Dimensions: []string{"host"},
			Interval:   influxql.Interval{Duration: 5 * time.Nanosecond},
		},
	)

	if a, err := Iterators([]influxql.Iterator{itr}).ReadAll(); err != nil {
		t.Fatalf("unexpected error: %s", err)
	} else if !deep.Equal(a, [][]influxql.Point{
		{&influxql.FloatPoint{Time: 2, Value: 10, Tags: ParseTags("host=hostA"), Aggregated: 3}},
		{&influxql.FloatPoint{Time: 1, Value: 11, Tags: ParseTags("host=hostB"), Aggregated: 1}},
		{&influxql.FloatPoint{Time: 6, Value: 20, Tags: ParseTags("host=hostA"), Aggregated: 1}},
		{&influxql.FloatPoint{Time: 23, Value: 8, Tags: ParseTags("host=hostB"), Aggregated: 1}},
	}) {
		t.Fatalf("unexpected points: %s", spew.Sdump(a))
	}
}

// Ensure that a integer iterator can be created for a min() call.
func TestCallIterator_Min_Integer(t *testing.T) {
	itr, _ := influxql.NewCallIterator(
		&IntegerIterator{Points: []influxql.IntegerPoint{
			{Time: 0, Value: 15, Tags: ParseTags("region=us-east,host=hostA")},
			{Time: 1, Value: 11, Tags: ParseTags("region=us-west,host=hostB")},
			{Time: 2, Value: 10, Tags: ParseTags("region=us-east,host=hostA")},
			{Time: 4, Value: 12, Tags: ParseTags("region=us-east,host=hostA")},
			{Time: 1, Value: 10, Tags: ParseTags("region=us-west,host=hostA")},

			{Time: 5, Value: 20, Tags: ParseTags("region=us-east,host=hostA")},

			{Time: 23, Value: 8, Tags: ParseTags("region=us-west,host=hostB")},
		}},
		influxql.IteratorOptions{
			Expr:       MustParseExpr(`min("value")`),
			Dimensions: []string{"host"},
			Interval:   influxql.Interval{Duration: 5 * time.Nanosecond},
		},
	)

	if a := Iterators([]influxql.Iterator{itr}).ReadAll(); !deep.Equal(a, [][]influxql.Point{
		{&influxql.IntegerPoint{Time: 1, Value: 10, Tags: ParseTags("host=hostA"), Aggregated: 4}},
		{&influxql.IntegerPoint{Time: 1, Value: 11, Tags: ParseTags("host=hostB"), Aggregated: 1}},
		{&influxql.IntegerPoint{Time: 5, Value: 20, Tags: ParseTags("host=hostA"), Aggregated: 1}},
		{&influxql.IntegerPoint{Time: 23, Value: 8, Tags: ParseTags("host=hostB"), Aggregated: 1}},
	}) {
		t.Fatalf("unexpected points: %s", spew.Sdump(a))
	}
}

// TestSample_AllSamplesSeen attempts to verify that it is possible
// to get every subsample in a reasonable number of iterations.
//
// The idea here is that 30 iterations should be enough to hit every possible
// sequence at least once.
func TestSample_AllSamplesSeen(t *testing.T) {
	ps := []influxql.FloatPoint{
		{Time: 1, Value: 1},
		{Time: 2, Value: 2},
		{Time: 3, Value: 3},
	}

	// List of all the possible subsamples
	samples := [][]influxql.FloatPoint{
		{
			{Time: 1, Value: 1},
			{Time: 2, Value: 2},
		},
		{
			{Time: 1, Value: 1},
			{Time: 3, Value: 3},
		},
		{
			{Time: 2, Value: 2},
			{Time: 3, Value: 3},
		},
	}

	// 30 iterations should be sufficient to guarantee that
	// we hit every possible subsample.
	for i := 0; i < 30; i++ {
		s := influxql.NewFloatSampleReducer(2)
		for _, p := range ps {
			s.AggregateFloat(&p)
		}

		points := s.Emit()

		for i, sample := range samples {
			// if we find a sample that it matches, remove it from
			// this list of possible samples
			if deep.Equal(sample, points) {
				samples = append(samples[:i], samples[i+1:]...)
				break
			}
		}

		// if samples is empty we've seen every sample, so we're done
		if len(samples) == 0 {
			return
		}

		// The FloatSampleReducer is seeded with time.Now().UnixNano(), and without this sleep,
		// this test will fail on machines where UnixNano doesn't return full resolution.
		// Specifically, some Windows machines will only return timestamps accurate to 100ns.
		// While iterating through this test without an explicit sleep,
		// we would only see one or two unique seeds across all the calls to NewFloatSampleReducer.
		time.Sleep(time.Millisecond)
	}

	// If we missed a sample, report the error
	if len(samples) != 0 {
		t.Fatalf("expected all samples to be seen; unseen samples: %#v", samples)
	}
}

// Ensure that a boolean iterator can be created for a last() call.
func TestCallIterator_Last_Boolean(t *testing.T) {
	itr, _ := influxql.NewCallIterator(
		&BooleanIterator{Points: []influxql.BooleanPoint{
			{Time: 1, Value: true, Tags: ParseTags("region=us-west,host=hostB")},
			{Time: 2, Value: false, Tags: ParseTags("region=us-east,host=hostA")},
			{Time: 0, Value: true, Tags: ParseTags("region=us-east,host=hostA")},
			{Time: 1, Value: false, Tags: ParseTags("region=us-west,host=hostA")},

			{Time: 6, Value: false, Tags: ParseTags("region=us-east,host=hostA")},

			{Time: 23, Value: false, Tags: ParseTags("region=us-west,host=hostB")},
		}},
		influxql.IteratorOptions{
			Expr:       MustParseExpr(`last("value")`),
			Dimensions: []string{"host"},
			Interval:   influxql.Interval{Duration: 5 * time.Nanosecond},
		},
	)

	if a := Iterators([]influxql.Iterator{itr}).ReadAll(); !deep.Equal(a, [][]influxql.Point{
		{&influxql.BooleanPoint{Time: 2, Value: false, Tags: ParseTags("host=hostA"), Aggregated: 3}},
		{&influxql.BooleanPoint{Time: 1, Value: true, Tags: ParseTags("host=hostB"), Aggregated: 1}},
		{&influxql.BooleanPoint{Time: 6, Value: false, Tags: ParseTags("host=hostA"), Aggregated: 1}},
		{&influxql.BooleanPoint{Time: 23, Value: false, Tags: ParseTags("host=hostB"), Aggregated: 1}},
	}) {
		t.Fatalf("unexpected points: %s", spew.Sdump(a))
	}
}

// Ensure that a boolean iterator can be created for a modBooleanl.
func TestCallIterator_Mode_Boolean(t *testing.T) {
	itr, _ := influxql.NewModeIterator(&BooleanIterator{Points: []influxql.BooleanPoint{
		{Time: 0, Value: true, Tags: ParseTags("region=us-east,host=hostA")},
		{Time: 1, Value: false, Tags: ParseTags("region=us-west,host=hostB")},
		{Time: 1, Value: true, Tags: ParseTags("region=us-west,host=hostA")},
		{Time: 2, Value: true, Tags: ParseTags("region=us-east,host=hostA")},
		{Time: 3, Value: true, Tags: ParseTags("region=us-east,host=hostA")},
		{Time: 4, Value: false, Tags: ParseTags("region=us-east,host=hostA")},
		{Time: 6, Value: false, Tags: ParseTags("region=us-east,host=hostA")},
		{Time: 7, Value: false, Tags: ParseTags("region=us-east,host=hostA")},
		{Time: 8, Value: false, Tags: ParseTags("region=us-east,host=hostA")},
		{Time: 22, Value: false, Tags: ParseTags("region=us-west,host=hostB")},
		{Time: 23, Value: true, Tags: ParseTags("region=us-west,host=hostB")},
		{Time: 24, Value: true, Tags: ParseTags("region=us-west,host=hostB")},
	}},
		influxql.IteratorOptions{
			Expr:       MustParseExpr(`mode("value")`),
			Dimensions: []string{"host"},
			Interval:   influxql.Interval{Duration: 5 * time.Nanosecond},
		},
	)

	if a, err := Iterators([]influxql.Iterator{itr}).ReadAll(); err != nil {
		t.Fatalf("unexpected error: %s", err)
	} else if !deep.Equal(a, [][]influxql.Point{
		{&influxql.BooleanPoint{Time: 0, Value: true, Tags: ParseTags("host=hostA")}},
		{&influxql.BooleanPoint{Time: 1, Value: false, Tags: ParseTags("host=hostB")}},
		{&influxql.BooleanPoint{Time: 5, Value: false, Tags: ParseTags("host=hostA")}},
		{&influxql.BooleanPoint{Time: 20, Value: true, Tags: ParseTags("host=hostB")}},
	}) {
		t.Fatalf("unexpected points: %s", spew.Sdump(a))
	}
}

// Ensure limit iterators work with limit and offset.
func TestLimitIterator_String(t *testing.T) {
	input := &StringIterator{Points: []influxql.StringPoint{
		{Name: "cpu", Time: 0, Value: "a"},
		{Name: "cpu", Time: 5, Value: "b"},
		{Name: "cpu", Time: 10, Value: "c"},
		{Name: "mem", Time: 5, Value: "d"},
		{Name: "mem", Time: 7, Value: "e"},
	}}

	itr := influxql.NewLimitIterator(input, influxql.IteratorOptions{
		Limit:  1,
		Offset: 1,
	})

	if a, err := Iterators([]influxql.Iterator{itr}).ReadAll(); err != nil {
		t.Fatalf("unexpected error: %s", err)
	} else if !deep.Equal(a, [][]influxql.Point{
		{&influxql.StringPoint{Name: "cpu", Time: 5, Value: "b"}},
		{&influxql.StringPoint{Name: "mem", Time: 7, Value: "e"}},
	}) {
		t.Fatalf("unexpected points: %s", spew.Sdump(a))
	}

	if !input.Closed {
		t.Error("iterator not closed")
	}
}

// Ensure that a string iterator can be created for a count() call.
func TestCallIterator_Count_String(t *testing.T) {
	itr, _ := influxql.NewCallIterator(
		&StringIterator{Points: []influxql.StringPoint{
			{Name: "cpu", Time: 0, Value: "d", Tags: ParseTags("region=us-east,host=hostA")},
			{Name: "cpu", Time: 1, Value: "c", Tags: ParseTags("region=us-west,host=hostB")},
			{Name: "cpu", Time: 2, Value: "b", Tags: ParseTags("region=us-east,host=hostA")},
			{Name: "cpu", Time: 1, Value: "b", Tags: ParseTags("region=us-west,host=hostA")},

			{Name: "cpu", Time: 5, Value: "e", Tags: ParseTags("region=us-east,host=hostA")},

			{Name: "cpu", Time: 23, Value: "a", Tags: ParseTags("region=us-west,host=hostB")},
			{Name: "mem", Time: 23, Value: "b", Tags: ParseTags("region=us-west,host=hostB")},
		}},
		influxql.IteratorOptions{
			Expr:       MustParseExpr(`count("value")`),
			Dimensions: []string{"host"},
			Interval:   influxql.Interval{Duration: 5 * time.Nanosecond},
		},
	)

	if a := Iterators([]influxql.Iterator{itr}).ReadAll(); !deep.Equal(a, [][]influxql.Point{
		{&influxql.IntegerPoint{Name: "cpu", Time: 0, Value: 3, Tags: ParseTags("host=hostA"), Aggregated: 3}},
		{&influxql.IntegerPoint{Name: "cpu", Time: 0, Value: 1, Tags: ParseTags("host=hostB"), Aggregated: 1}},
		{&influxql.IntegerPoint{Name: "cpu", Time: 5, Value: 1, Tags: ParseTags("host=hostA"), Aggregated: 1}},
		{&influxql.IntegerPoint{Name: "cpu", Time: 20, Value: 1, Tags: ParseTags("host=hostB"), Aggregated: 1}},
		{&influxql.IntegerPoint{Name: "mem", Time: 20, Value: 1, Tags: ParseTags("host=hostB"), Aggregated: 1}},
	}) {
		t.Fatalf("unexpected points: %s", spew.Sdump(a))
	}
}

// Ensure the emitter will limit the chunked output from a series.
func TestEmitter_ChunkSize(t *testing.T) {
	// Build an emitter that pulls from one iterator with multiple points in the same series.
	e := influxql.NewEmitter([]influxql.Iterator{
		&FloatIterator{Points: []influxql.FloatPoint{
			{Name: "cpu", Tags: ParseTags("region=west"), Time: 0, Value: 1},
			{Name: "cpu", Tags: ParseTags("region=west"), Time: 1, Value: 2},
		}},
	}, true, 1)
	e.Columns = []string{"col1"}

	// Verify the cpu region=west is emitted first.
	if row, _, err := e.Emit(); err != nil {
		t.Fatalf("unexpected error(0): %s", err)
	} else if !deep.Equal(row, &models.Row{
		Name:    "cpu",
		Tags:    map[string]string{"region": "west"},
		Columns: []string{"col1"},
		Values: [][]interface{}{
			{time.Unix(0, 0).UTC(), float64(1)},
		},
		Partial: true,
	}) {
		t.Fatalf("unexpected row(0): %s", spew.Sdump(row))
	}

	// Verify the cpu region=north is emitted next.
	if row, _, err := e.Emit(); err != nil {
		t.Fatalf("unexpected error(1): %s", err)
	} else if !deep.Equal(row, &models.Row{
		Name:    "cpu",
		Tags:    map[string]string{"region": "west"},
		Columns: []string{"col1"},
		Values: [][]interface{}{
			{time.Unix(0, 1).UTC(), float64(2)},
		},
	}) {
		t.Fatalf("unexpected row(1): %s", spew.Sdump(row))
	}

	// Verify EOF.
	if row, _, err := e.Emit(); err != nil {
		t.Fatalf("unexpected error(eof): %s", err)
	} else if row != nil {
		t.Fatalf("unexpected eof: %s", spew.Sdump(row))
	}
}