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// Copyright (C) MongoDB, Inc. 2014-present.
//
// 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
package progress
import (
"bytes"
"github.com/mongodb/mongo-tools/common/testtype"
. "github.com/smartystreets/goconvey/convey"
"strconv"
"strings"
"sync"
"testing"
"time"
)
type safeBuffer struct {
sync.Mutex
bytes.Buffer
}
func (b *safeBuffer) Write(p []byte) (n int, err error) {
b.Lock()
defer b.Unlock()
return b.Buffer.Write(p)
}
func (b *safeBuffer) String() string {
b.Lock()
defer b.Unlock()
return b.Buffer.String()
}
func (b *safeBuffer) Reset() {
b.Lock()
defer b.Unlock()
b.Buffer.Reset()
}
func TestManagerAttachAndDetach(t *testing.T) {
testtype.SkipUnlessTestType(t, testtype.UnitTestType)
writeBuffer := new(safeBuffer)
var manager *BarWriter
Convey("With an empty progress.BarWriter", t, func() {
manager = NewBarWriter(writeBuffer, time.Second, 10, false)
So(manager, ShouldNotBeNil)
Convey("adding 3 bars", func() {
progressor := NewCounter(10)
progressor.Inc(5)
manager.Attach("TEST1", progressor)
manager.Attach("TEST2", progressor)
manager.Attach("TEST3", progressor)
So(len(manager.bars), ShouldEqual, 3)
Convey("should write all three bars ar once", func() {
manager.renderAllBars()
writtenString := writeBuffer.String()
So(writtenString, ShouldContainSubstring, "TEST1")
So(writtenString, ShouldContainSubstring, "TEST2")
So(writtenString, ShouldContainSubstring, "TEST3")
})
Convey("detaching the second bar", func() {
manager.Detach("TEST2")
So(len(manager.bars), ShouldEqual, 2)
Convey("should print 1,3", func() {
manager.renderAllBars()
writtenString := writeBuffer.String()
So(writtenString, ShouldContainSubstring, "TEST1")
So(writtenString, ShouldNotContainSubstring, "TEST2")
So(writtenString, ShouldContainSubstring, "TEST3")
So(
strings.Index(writtenString, "TEST1"),
ShouldBeLessThan,
strings.Index(writtenString, "TEST3"),
)
})
Convey("but adding a new bar should print 1,2,4", func() {
manager.Attach("TEST4", progressor)
So(len(manager.bars), ShouldEqual, 3)
manager.renderAllBars()
writtenString := writeBuffer.String()
So(writtenString, ShouldContainSubstring, "TEST1")
So(writtenString, ShouldNotContainSubstring, "TEST2")
So(writtenString, ShouldContainSubstring, "TEST3")
So(writtenString, ShouldContainSubstring, "TEST4")
So(
strings.Index(writtenString, "TEST1"),
ShouldBeLessThan,
strings.Index(writtenString, "TEST3"),
)
So(
strings.Index(writtenString, "TEST3"),
ShouldBeLessThan,
strings.Index(writtenString, "TEST4"),
)
})
Reset(func() { writeBuffer.Reset() })
})
Reset(func() { writeBuffer.Reset() })
})
})
}
func TestManagerStartAndStop(t *testing.T) {
testtype.SkipUnlessTestType(t, testtype.UnitTestType)
writeBuffer := new(safeBuffer)
var manager *BarWriter
Convey("With a progress.BarWriter with a waitTime of 10 ms and one bar", t, func() {
manager = NewBarWriter(writeBuffer, time.Millisecond*10, 10, false)
So(manager, ShouldNotBeNil)
watching := NewCounter(10)
watching.Inc(5)
manager.Attach("TEST", watching)
So(manager.waitTime, ShouldEqual, time.Millisecond*10)
So(len(manager.bars), ShouldEqual, 1)
Convey("running the manager for 45 ms and stopping", func() {
manager.Start()
time.Sleep(time.Millisecond * 45) // enough time for the manager to write 4 times
manager.Stop()
Convey("should generate 4 writes of the bar", func() {
output := writeBuffer.String()
So(strings.Count(output, "TEST"), ShouldEqual, 4)
})
Convey("starting and stopping the manager again should not panic", func() {
So(manager.Start, ShouldNotPanic)
So(manager.Stop, ShouldNotPanic)
})
})
})
}
func TestNumberOfWrites(t *testing.T) {
testtype.SkipUnlessTestType(t, testtype.UnitTestType)
var cw *CountWriter
var manager *BarWriter
Convey("With a test manager and counting writer", t, func() {
cw = new(CountWriter)
manager = NewBarWriter(cw, time.Millisecond*10, 10, false)
So(manager, ShouldNotBeNil)
manager.Attach("1", NewCounter(10))
Convey("with one attached bar", func() {
So(len(manager.bars), ShouldEqual, 1)
Convey("only one write should be made per render", func() {
manager.renderAllBars()
So(cw.Count(), ShouldEqual, 1)
})
})
Convey("with two bars attached", func() {
manager.Attach("2", NewCounter(10))
So(len(manager.bars), ShouldEqual, 2)
Convey("three writes should be made per render, since an empty write is added", func() {
manager.renderAllBars()
So(cw.Count(), ShouldEqual, 3)
})
})
Convey("with 57 bars attached", func() {
for i := 2; i <= 57; i++ {
manager.Attach(strconv.Itoa(i), NewCounter(10))
}
So(len(manager.bars), ShouldEqual, 57)
Convey("58 writes should be made per render, since an empty write is added", func() {
manager.renderAllBars()
So(cw.Count(), ShouldEqual, 58)
})
})
})
}
// helper type for counting calls to a writer
type CountWriter int
func (cw CountWriter) Count() int {
return int(cw)
}
func (cw *CountWriter) Write(b []byte) (int, error) {
*cw++
return len(b), nil
}
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