forked from TrueCloudLab/restic
361 lines
8.7 KiB
Go
361 lines
8.7 KiB
Go
// Copyright 2015 Google Inc. All Rights Reserved.
|
|
//
|
|
// 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 bigquery
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"testing"
|
|
|
|
"cloud.google.com/go/internal/testutil"
|
|
|
|
"golang.org/x/net/context"
|
|
"google.golang.org/api/iterator"
|
|
)
|
|
|
|
type fetchResponse struct {
|
|
result *fetchPageResult // The result to return.
|
|
err error // The error to return.
|
|
}
|
|
|
|
// pageFetcherStub services fetch requests by returning data from an in-memory list of values.
|
|
type pageFetcherStub struct {
|
|
fetchResponses map[string]fetchResponse
|
|
err error
|
|
}
|
|
|
|
func (pf *pageFetcherStub) fetchPage(ctx context.Context, _ *Table, _ Schema, _ uint64, _ int64, pageToken string) (*fetchPageResult, error) {
|
|
call, ok := pf.fetchResponses[pageToken]
|
|
if !ok {
|
|
pf.err = fmt.Errorf("Unexpected page token: %q", pageToken)
|
|
}
|
|
return call.result, call.err
|
|
}
|
|
|
|
func TestIterator(t *testing.T) {
|
|
var (
|
|
iiSchema = Schema{
|
|
{Type: IntegerFieldType},
|
|
{Type: IntegerFieldType},
|
|
}
|
|
siSchema = Schema{
|
|
{Type: StringFieldType},
|
|
{Type: IntegerFieldType},
|
|
}
|
|
)
|
|
fetchFailure := errors.New("fetch failure")
|
|
|
|
testCases := []struct {
|
|
desc string
|
|
pageToken string
|
|
fetchResponses map[string]fetchResponse
|
|
want [][]Value
|
|
wantErr error
|
|
wantSchema Schema
|
|
}{
|
|
{
|
|
desc: "Iteration over single empty page",
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {
|
|
result: &fetchPageResult{
|
|
pageToken: "",
|
|
rows: [][]Value{},
|
|
schema: Schema{},
|
|
},
|
|
},
|
|
},
|
|
want: [][]Value{},
|
|
wantSchema: Schema{},
|
|
},
|
|
{
|
|
desc: "Iteration over single page",
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {
|
|
result: &fetchPageResult{
|
|
pageToken: "",
|
|
rows: [][]Value{{1, 2}, {11, 12}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
},
|
|
want: [][]Value{{1, 2}, {11, 12}},
|
|
wantSchema: iiSchema,
|
|
},
|
|
{
|
|
desc: "Iteration over single page with different schema",
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {
|
|
result: &fetchPageResult{
|
|
pageToken: "",
|
|
rows: [][]Value{{"1", 2}, {"11", 12}},
|
|
schema: siSchema,
|
|
},
|
|
},
|
|
},
|
|
want: [][]Value{{"1", 2}, {"11", 12}},
|
|
wantSchema: siSchema,
|
|
},
|
|
{
|
|
desc: "Iteration over two pages",
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {
|
|
result: &fetchPageResult{
|
|
pageToken: "a",
|
|
rows: [][]Value{{1, 2}, {11, 12}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
"a": {
|
|
result: &fetchPageResult{
|
|
pageToken: "",
|
|
rows: [][]Value{{101, 102}, {111, 112}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
},
|
|
want: [][]Value{{1, 2}, {11, 12}, {101, 102}, {111, 112}},
|
|
wantSchema: iiSchema,
|
|
},
|
|
{
|
|
desc: "Server response includes empty page",
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {
|
|
result: &fetchPageResult{
|
|
pageToken: "a",
|
|
rows: [][]Value{{1, 2}, {11, 12}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
"a": {
|
|
result: &fetchPageResult{
|
|
pageToken: "b",
|
|
rows: [][]Value{},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
"b": {
|
|
result: &fetchPageResult{
|
|
pageToken: "",
|
|
rows: [][]Value{{101, 102}, {111, 112}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
},
|
|
want: [][]Value{{1, 2}, {11, 12}, {101, 102}, {111, 112}},
|
|
wantSchema: iiSchema,
|
|
},
|
|
{
|
|
desc: "Fetch error",
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {
|
|
result: &fetchPageResult{
|
|
pageToken: "a",
|
|
rows: [][]Value{{1, 2}, {11, 12}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
"a": {
|
|
// We returns some data from this fetch, but also an error.
|
|
// So the end result should include only data from the previous fetch.
|
|
err: fetchFailure,
|
|
result: &fetchPageResult{
|
|
pageToken: "b",
|
|
rows: [][]Value{{101, 102}, {111, 112}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
},
|
|
want: [][]Value{{1, 2}, {11, 12}},
|
|
wantErr: fetchFailure,
|
|
wantSchema: iiSchema,
|
|
},
|
|
|
|
{
|
|
desc: "Skip over an entire page",
|
|
pageToken: "a",
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {
|
|
result: &fetchPageResult{
|
|
pageToken: "a",
|
|
rows: [][]Value{{1, 2}, {11, 12}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
"a": {
|
|
result: &fetchPageResult{
|
|
pageToken: "",
|
|
rows: [][]Value{{101, 102}, {111, 112}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
},
|
|
want: [][]Value{{101, 102}, {111, 112}},
|
|
wantSchema: iiSchema,
|
|
},
|
|
|
|
{
|
|
desc: "Skip beyond all data",
|
|
pageToken: "b",
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {
|
|
result: &fetchPageResult{
|
|
pageToken: "a",
|
|
rows: [][]Value{{1, 2}, {11, 12}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
"a": {
|
|
result: &fetchPageResult{
|
|
pageToken: "b",
|
|
rows: [][]Value{{101, 102}, {111, 112}},
|
|
schema: iiSchema,
|
|
},
|
|
},
|
|
"b": {
|
|
result: &fetchPageResult{},
|
|
},
|
|
},
|
|
// In this test case, Next will return false on its first call,
|
|
// so we won't even attempt to call Get.
|
|
want: [][]Value{},
|
|
wantSchema: Schema{},
|
|
},
|
|
}
|
|
|
|
for _, tc := range testCases {
|
|
pf := &pageFetcherStub{
|
|
fetchResponses: tc.fetchResponses,
|
|
}
|
|
it := newRowIterator(context.Background(), nil, pf.fetchPage)
|
|
it.PageInfo().Token = tc.pageToken
|
|
values, schema, err := consumeRowIterator(it)
|
|
if err != tc.wantErr {
|
|
t.Fatalf("%s: got %v, want %v", tc.desc, err, tc.wantErr)
|
|
}
|
|
if (len(values) != 0 || len(tc.want) != 0) && !testutil.Equal(values, tc.want) {
|
|
t.Errorf("%s: values:\ngot: %v\nwant:%v", tc.desc, values, tc.want)
|
|
}
|
|
if (len(schema) != 0 || len(tc.wantSchema) != 0) && !testutil.Equal(schema, tc.wantSchema) {
|
|
t.Errorf("%s: iterator.Schema:\ngot: %v\nwant: %v", tc.desc, schema, tc.wantSchema)
|
|
}
|
|
}
|
|
}
|
|
|
|
type valueListWithSchema struct {
|
|
vals valueList
|
|
schema Schema
|
|
}
|
|
|
|
func (v *valueListWithSchema) Load(vs []Value, s Schema) error {
|
|
v.vals.Load(vs, s)
|
|
v.schema = s
|
|
return nil
|
|
}
|
|
|
|
// consumeRowIterator reads the schema and all values from a RowIterator and returns them.
|
|
func consumeRowIterator(it *RowIterator) ([][]Value, Schema, error) {
|
|
var got [][]Value
|
|
var schema Schema
|
|
for {
|
|
var vls valueListWithSchema
|
|
err := it.Next(&vls)
|
|
if err == iterator.Done {
|
|
return got, schema, nil
|
|
}
|
|
if err != nil {
|
|
return got, schema, err
|
|
}
|
|
got = append(got, vls.vals)
|
|
schema = vls.schema
|
|
}
|
|
}
|
|
|
|
func TestNextDuringErrorState(t *testing.T) {
|
|
pf := &pageFetcherStub{
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {err: errors.New("bang")},
|
|
},
|
|
}
|
|
it := newRowIterator(context.Background(), nil, pf.fetchPage)
|
|
var vals []Value
|
|
if err := it.Next(&vals); err == nil {
|
|
t.Errorf("Expected error after calling Next")
|
|
}
|
|
if err := it.Next(&vals); err == nil {
|
|
t.Errorf("Expected error calling Next again when iterator has a non-nil error.")
|
|
}
|
|
}
|
|
|
|
func TestNextAfterFinished(t *testing.T) {
|
|
testCases := []struct {
|
|
fetchResponses map[string]fetchResponse
|
|
want [][]Value
|
|
}{
|
|
{
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {
|
|
result: &fetchPageResult{
|
|
pageToken: "",
|
|
rows: [][]Value{{1, 2}, {11, 12}},
|
|
},
|
|
},
|
|
},
|
|
want: [][]Value{{1, 2}, {11, 12}},
|
|
},
|
|
{
|
|
fetchResponses: map[string]fetchResponse{
|
|
"": {
|
|
result: &fetchPageResult{
|
|
pageToken: "",
|
|
rows: [][]Value{},
|
|
},
|
|
},
|
|
},
|
|
want: [][]Value{},
|
|
},
|
|
}
|
|
|
|
for _, tc := range testCases {
|
|
pf := &pageFetcherStub{
|
|
fetchResponses: tc.fetchResponses,
|
|
}
|
|
it := newRowIterator(context.Background(), nil, pf.fetchPage)
|
|
|
|
values, _, err := consumeRowIterator(it)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if (len(values) != 0 || len(tc.want) != 0) && !testutil.Equal(values, tc.want) {
|
|
t.Errorf("values: got:\n%v\nwant:\n%v", values, tc.want)
|
|
}
|
|
// Try calling Get again.
|
|
var vals []Value
|
|
if err := it.Next(&vals); err != iterator.Done {
|
|
t.Errorf("Expected Done calling Next when there are no more values")
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestIteratorNextTypes(t *testing.T) {
|
|
it := newRowIterator(context.Background(), nil, nil)
|
|
for _, v := range []interface{}{3, "s", []int{}, &[]int{},
|
|
map[string]Value{}, &map[string]interface{}{},
|
|
struct{}{},
|
|
} {
|
|
if err := it.Next(v); err == nil {
|
|
t.Error("%v: want error, got nil", v)
|
|
}
|
|
}
|
|
}
|