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File read-able check should ignore file creation flags #8

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File read-able check should ignore file creation flags #8

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2 changes: 1 addition & 1 deletion memfs/memory.go
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Original file line number Diff line number Diff line change
Expand Up @@ -229,7 +229,7 @@ func (f *file) ReadAt(b []byte, off int64) (int, error) {
return 0, os.ErrClosed
}

if !isReadAndWrite(f.flag) && !isReadOnly(f.flag) {
if isWriteOnly(f.flag) {
return 0, errors.New("read not supported")
}

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6 changes: 6 additions & 0 deletions test/basic.go
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Expand Up @@ -116,6 +116,12 @@ func (s *BasicSuite) TestOpenFile(c *C) {
c.Assert(f.Name(), Equals, "foo1")
s.testReadClose(c, f, "foo1overwritten")

// Read-only if it exists
f, err = s.FS.OpenFile("foo1", os.O_RDONLY|os.O_CREATE, defaultMode)
c.Assert(err, IsNil)
c.Assert(f.Name(), Equals, "foo1")
s.testReadClose(c, f, "foo1overwritten")

// Create when it does exist
f, err = s.FS.OpenFile("foo1", os.O_CREATE|os.O_WRONLY|os.O_TRUNC, defaultMode)
c.Assert(err, IsNil)
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