122 lines
2.5 KiB
Go
122 lines
2.5 KiB
Go
package awstesting
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import (
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"io"
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"os"
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"strings"
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"time"
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"github.com/aws/aws-sdk-go/private/util"
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)
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// ZeroReader is a io.Reader which will always write zeros to the byte slice provided.
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type ZeroReader struct{}
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// Read fills the provided byte slice with zeros returning the number of bytes written.
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func (r *ZeroReader) Read(b []byte) (int, error) {
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for i := 0; i < len(b); i++ {
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b[i] = 0
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}
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return len(b), nil
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}
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// ReadCloser is a io.ReadCloser for unit testing.
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// Designed to test for leaks and whether a handle has
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// been closed
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type ReadCloser struct {
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Size int
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Closed bool
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set bool
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FillData func(bool, []byte, int, int)
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}
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// Read will call FillData and fill it with whatever data needed.
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// Decrements the size until zero, then return io.EOF.
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func (r *ReadCloser) Read(b []byte) (int, error) {
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if r.Closed {
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return 0, io.EOF
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}
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delta := len(b)
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if delta > r.Size {
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delta = r.Size
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}
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r.Size -= delta
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for i := 0; i < delta; i++ {
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b[i] = 'a'
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}
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if r.FillData != nil {
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r.FillData(r.set, b, r.Size, delta)
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}
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r.set = true
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if r.Size > 0 {
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return delta, nil
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}
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return delta, io.EOF
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}
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// Close sets Closed to true and returns no error
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func (r *ReadCloser) Close() error {
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r.Closed = true
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return nil
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}
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// SortedKeys returns a sorted slice of keys of a map.
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func SortedKeys(m map[string]interface{}) []string {
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return util.SortedKeys(m)
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}
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// A FakeContext provides a simple stub implementation of a Context
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type FakeContext struct {
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Error error
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DoneCh chan struct{}
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}
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// Deadline always will return not set
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func (c *FakeContext) Deadline() (deadline time.Time, ok bool) {
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return time.Time{}, false
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}
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// Done returns a read channel for listening to the Done event
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func (c *FakeContext) Done() <-chan struct{} {
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return c.DoneCh
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}
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// Err returns the error, is nil if not set.
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func (c *FakeContext) Err() error {
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return c.Error
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}
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// Value ignores the Value and always returns nil
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func (c *FakeContext) Value(key interface{}) interface{} {
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return nil
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}
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// StashEnv stashes the current environment variables and returns an array of
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// all environment values as key=val strings.
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func StashEnv() []string {
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env := os.Environ()
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os.Clearenv()
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return env
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}
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// PopEnv takes the list of the environment values and injects them into the
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// process's environment variable data. Clears any existing environment values
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// that may already exist.
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func PopEnv(env []string) {
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os.Clearenv()
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for _, e := range env {
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p := strings.SplitN(e, "=", 2)
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k, v := p[0], ""
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if len(p) > 1 {
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v = p[1]
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}
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os.Setenv(k, v)
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}
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}
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