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// Copyright (C) MongoDB, Inc. 2022-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 driver
import (
"testing"
"time"
"go.mongodb.org/mongo-driver/internal/assert"
)
func TestBatchCursor(t *testing.T) {
t.Parallel()
t.Run("setBatchSize", func(t *testing.T) {
t.Parallel()
var size int32
bc := &BatchCursor{
batchSize: size,
}
assert.Equal(t, size, bc.batchSize, "expected batchSize %v, got %v", size, bc.batchSize)
size = int32(4)
bc.SetBatchSize(size)
assert.Equal(t, size, bc.batchSize, "expected batchSize %v, got %v", size, bc.batchSize)
})
t.Run("calcGetMoreBatchSize", func(t *testing.T) {
t.Parallel()
for _, tcase := range []struct {
name string
size, limit, numReturned, expected int32
ok bool
}{
{
name: "empty",
expected: 0,
ok: true,
},
{
name: "batchSize NEQ 0",
size: 4,
expected: 4,
ok: true,
},
{
name: "limit NEQ 0",
limit: 4,
expected: 0,
ok: true,
},
{
name: "limit NEQ and batchSize + numReturned EQ limit",
size: 4,
limit: 8,
numReturned: 4,
expected: 4,
ok: true,
},
{
name: "limit makes batchSize negative",
numReturned: 4,
limit: 2,
expected: -2,
ok: false,
},
} {
tcase := tcase
t.Run(tcase.name, func(t *testing.T) {
t.Parallel()
bc := &BatchCursor{
limit: tcase.limit,
batchSize: tcase.size,
numReturned: tcase.numReturned,
}
bc.SetBatchSize(tcase.size)
size, ok := calcGetMoreBatchSize(*bc)
assert.Equal(t, tcase.expected, size, "expected batchSize %v, got %v", tcase.expected, size)
assert.Equal(t, tcase.ok, ok, "expected ok %v, got %v", tcase.ok, ok)
})
}
})
}
func TestBatchCursorSetMaxTime(t *testing.T) {
t.Parallel()
tests := []struct {
name string
dur time.Duration
want int64
}{
{
name: "empty",
dur: 0,
want: 0,
},
{
name: "partial milliseconds are truncated",
dur: 10_900 * time.Microsecond,
want: 10,
},
{
name: "millisecond input",
dur: 10 * time.Millisecond,
want: 10,
},
}
for _, test := range tests {
test := test
t.Run(test.name, func(t *testing.T) {
t.Parallel()
bc := BatchCursor{}
bc.SetMaxTime(test.dur)
got := bc.maxTimeMS
assert.Equal(t, test.want, got, "expected and actual maxTimeMS are different")
})
}
}
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