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Copy pathsession_fs_range_test.go
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88 lines (81 loc) · 3.2 KB
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// Copyright (c) Microsoft Corporation. All rights reserved.
package copilot
import (
"encoding/base64"
"os"
"testing"
"github.com/github/copilot-sdk/go/rpc"
)
type rangeOnlyProvider struct {
SessionFSProvider
read func(string, int64, *int64) (*SessionFSByteRange, error)
}
func (p rangeOnlyProvider) ReadFileRange(path string, offset int64, length *int64) (*SessionFSByteRange, error) {
return p.read(path, offset, length)
}
func TestSessionFSByteRanges(t *testing.T) {
data := []byte("a☃🚀z")
two, zero, twenty := int64(2), int64(0), int64(20)
for _, tc := range []struct {
offset int64
length *int64
}{
{2, &two}, {4, nil}, {3, &zero}, {7, &twenty}, {9, nil}, {100, &two},
} {
start := min(tc.offset, int64(len(data)))
end := int64(len(data))
if tc.length != nil {
end = min(end, start+*tc.length)
}
want := data[start:end]
called := false
adapter := newSessionFSAdapter(rangeOnlyProvider{read: func(path string, offset int64, length *int64) (*SessionFSByteRange, error) {
called = true
if path != "/file" || offset != tc.offset || length != tc.length {
t.Fatal("range request was altered")
}
return &SessionFSByteRange{Content: want, ByteLength: int64(len(data))}, nil
}})
result, err := adapter.ReadFileRange(&rpc.SessionFSReadFileRangeRequest{Path: "/file", Offset: tc.offset, Length: tc.length})
if err != nil || result.Error != nil || !called {
t.Fatalf("ReadFileRange = %+v, %v", result, err)
}
if result.Content != base64.StdEncoding.EncodeToString(want) || result.ByteLength != int64(len(data)) {
t.Fatalf("unexpected range: %+v", result)
}
}
}
func TestSessionFSByteRangeValidationAndErrors(t *testing.T) {
called := false
adapter := newSessionFSAdapter(rangeOnlyProvider{read: func(string, int64, *int64) (*SessionFSByteRange, error) {
called = true
return nil, os.ErrNotExist
}})
for _, position := range []int64{-1, 9_007_199_254_740_992} {
for _, request := range []*rpc.SessionFSReadFileRangeRequest{
{Offset: position}, {Length: &position},
} {
result, err := adapter.ReadFileRange(request)
if err != nil || result.Error == nil || called {
t.Fatalf("invalid range reached provider: %+v, %v", result, err)
}
}
}
result, err := adapter.ReadFileRange(&rpc.SessionFSReadFileRangeRequest{})
if err != nil || result.Error == nil || result.Error.Code != rpc.SessionFSErrorCodeENOENT {
t.Fatalf("lost filesystem error: %+v, %v", result, err)
}
legacy := newSessionFSAdapter(failingWriteProvider{})
result, err = legacy.ReadFileRange(&rpc.SessionFSReadFileRangeRequest{})
if err != nil || result.Error == nil {
t.Fatalf("legacy range did not fail: %+v, %v", result, err)
}
for _, invalid := range []*SessionFSByteRange{nil, {Content: []byte{1}, ByteLength: 5}, {Content: []byte{1, 2, 3}, ByteLength: 5}, {ByteLength: -1}, {ByteLength: 9_007_199_254_740_992}} {
adapter := newSessionFSAdapter(rangeOnlyProvider{read: func(string, int64, *int64) (*SessionFSByteRange, error) { return invalid, nil }})
length := int64(2)
result, err := adapter.ReadFileRange(&rpc.SessionFSReadFileRangeRequest{Offset: 1, Length: &length})
if err != nil || result.Error == nil {
t.Fatalf("accepted invalid provider range: %+v, %v", result, err)
}
}
}