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// Copyright (C) MongoDB, Inc. 2017-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 mongo
import (
"errors"
"testing"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/internal/testutil/assert"
)
func TestSingleResult(t *testing.T) {
t.Run("Decode", func(t *testing.T) {
t.Run("decode twice", func(t *testing.T) {
// Test that Decode and DecodeBytes can be called more than once
c, err := newCursor(newTestBatchCursor(1, 1), bson.DefaultRegistry)
assert.Nil(t, err, "newCursor error: %v", err)
sr := &SingleResult{cur: c, reg: bson.DefaultRegistry}
var firstDecode, secondDecode bson.Raw
err = sr.Decode(&firstDecode)
assert.Nil(t, err, "Decode error: %v", err)
err = sr.Decode(&secondDecode)
assert.Nil(t, err, "Decode error: %v", err)
decodeBytes, err := sr.DecodeBytes()
assert.Nil(t, err, "DecodeBytes error: %v", err)
assert.Equal(t, firstDecode, secondDecode, "expected contents %v, got %v", firstDecode, secondDecode)
assert.Equal(t, firstDecode, decodeBytes, "expected contents %v, got %v", firstDecode, decodeBytes)
})
t.Run("decode with error", func(t *testing.T) {
r := []byte("foo")
sr := &SingleResult{rdr: r, err: errors.New("DecodeBytes error")}
res, err := sr.DecodeBytes()
resBytes := []byte(res)
assert.Equal(t, r, resBytes, "expected contents %v, got %v", r, resBytes)
assert.Equal(t, sr.err, err, "expected error %v, got %v", sr.err, err)
})
})
t.Run("Err", func(t *testing.T) {
sr := &SingleResult{}
assert.Equal(t, ErrNoDocuments, sr.Err(), "expected error %v, got %v", ErrNoDocuments, sr.Err())
})
}
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