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io: add ErrBadWriteCount

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Change-Id: I04aebbaeb504f3b856b351bb924b1bce9a015083
This commit is contained in:
Tao Qingyun 2020-10-13 13:54:17 +08:00
parent 838d6bac72
commit 19cbb1461c
1 changed files with 6 additions and 8 deletions
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14
src/io/io_test.go
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@ -431,7 +431,7 @@ func TestSectionReader_Size(t *testing.T) {
} }
// largeWriter returns an invalid count that is larger than the number // largeWriter returns an invalid count that is larger than the number
// of bytes requested (issue 39978). // of bytes provided (issue 39978).
type largeWriter struct { type largeWriter struct {
err error err error
} }
@ -446,16 +446,14 @@ func TestCopyLargeWriter(t *testing.T) {
wb := largeWriter{} wb := largeWriter{}
rb.WriteString("hello, world.") rb.WriteString("hello, world.")
if _, err := Copy(wb, rb); err != want { if _, err := Copy(wb, rb); err != want {
t.Errorf("Copy Error: got %v, want %v", err, want) t.Errorf("Copy error: got %v, want %v", err, want)
} }
}
func TestCopyLargeWriterError(t *testing.T) { want = errors.New("largeWriterError")
want := errors.New("largerWriteError") rb = new(Buffer)
rb := new(Buffer) wb = largeWriter{err: want}
wb := largeWriter{err: want}
rb.WriteString("hello, world.") rb.WriteString("hello, world.")
if _, err := Copy(wb, rb); err != want { if _, err := Copy(wb, rb); err != want {
t.Errorf("Copy Error: got %v, want %v", err, want) t.Errorf("Copy error: got %v, want %v", err, want)
} }
} }