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// Copyright 2018, the Blazer 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 window
import (
"testing"
"time"
)
type epair struct {
e interface{}
t time.Time
}
func adder(i, j interface{}) interface{} {
a, ok := i.(int)
if !ok {
a = 0
}
b, ok := j.(int)
if !ok {
b = 0
}
return a + b
}
func TestWindows(t *testing.T) {
table := []struct {
size, dur time.Duration
incs []epair
look time.Time
reduce Reducer
want interface{}
}{
{
size: time.Minute,
dur: time.Second,
incs: []epair{
// year, month, day, hour, min, sec, nano
{t: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 1, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 2, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 3, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 4, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 5, 0, time.UTC), e: 1},
},
look: time.Date(2000, 1, 1, 0, 1, 0, 0, time.UTC),
want: 5,
reduce: adder,
},
{
incs: []epair{
// year, month, day, hour, min, sec, nano
{t: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 1, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 2, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 3, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 4, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 5, 0, time.UTC), e: 1},
},
want: 6,
reduce: adder,
},
{ // what happens if time goes backwards?
size: time.Minute,
dur: time.Second,
incs: []epair{
{t: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 1, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 2, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 3, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 4, 0, time.UTC), e: 1},
{t: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC), e: 1},
},
look: time.Date(2000, 1, 1, 0, 0, 30, 0, time.UTC),
want: 1,
reduce: adder,
},
}
for _, e := range table {
w := New(e.size, e.dur, e.reduce)
for _, inc := range e.incs {
w.insertAt(inc.t, inc.e)
}
ct := w.reducedAt(e.look)
if ct != e.want {
t.Errorf("reducedAt(%v) got %v, want %v", e.look, ct, e.want)
}
}
}
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