func TestRel(t *testing.T) {
// To randomize.
cases := map[string]struct{}{
"/": {},
"C:/": {},
"/a": {},
"X:/a": {},
"/tmp": {},
"C:/Windows/Temp": {},
"/private/var/tmp": {},
"C:/Program Files (x86)": {},
}
for cas := range cases {
cas = filepath.FromSlash(cas)
for i, tree := range trees {
// This is a hack, which emulates:
//
// func EqualFilesystem(lhs memfs.FS, rhs fs.FS) bool
//
// Which should probably hit memfs/util.go file eventually.
exp, spy := move(tree, cas), memfs.New()
if n := Copy(tree, Rel(spy, cas)); n == 0 {
t.Errorf("want n!=0 (cas=%s, i=%d)", cas, i)
continue
}
if !memfs.Equal(spy, exp) {
t.Errorf("want spy=exp (cas=%s, i=%d)", cas, i)
}
return
}
}
}
// TODO(rjeczalik): Split into TestTeeOpen and TestTeeReaddir
func TestTeeOpen(t *testing.T) {
cases := [...]struct {
open []string
read []string
fs []byte
}{
0: {
open: []string{"/w/x/y/z"},
fs: []byte(".\nw\n\tx\n\t\ty\n\t\t\tz/"),
},
1: {
open: []string{"/a.txt", "/w/w.txt", "/a"},
fs: []byte(".\na/\na.txt\nw\n\tw.txt"),
},
2: {
read: []string{"/a/b2/c1"},
fs: []byte(".\na\n\tb2\n\t\tc1\n\t\t\td1.txt\n\t\t\td2/\n\t\t\td3.txt"),
},
3: {
read: []string{"/a/b1/c1", "/a/b1/c2", "/a/b1/c3"},
fs: []byte(".\na\n\tb1\n\t\tc1\n\t\t\tc1.txt\n\t\tc2\n\t\t\tc2.txt\n\t\t" +
"c3\n\t\t\tc3.txt\n\t\t\td1/"),
},
4: {
read: []string{"/w", "/w/x/y", "/w/x/y/z", "/w/x"},
fs: []byte(".\nw\n\tw.txt\n\tx\n\t\ty\n\t\t\tz\n\t\t\t\t1.txt\n\t\ty.txt"),
}}
Test:
for i, cas := range cases {
spy := memfs.New()
tee := Tee(tree, spy)
for j, path := range cas.open {
if _, err := tee.Open(filepath.FromSlash(path)); err != nil {
t.Errorf("want err=nil; got %q (i=%d, j=%d)", err, i, j)
continue Test
}
}
for j, path := range cas.read {
f, err := tee.Open(filepath.FromSlash(path))
if err != nil {
t.Errorf("want err=nil; got %q (i=%d, j=%d)", err, i, j)
continue Test
}
if _, err = f.Readdir(0); err != nil {
t.Errorf("want err=nil; got %q (i=%d, j=%d)", err, i, j)
continue Test
}
}
if !memfs.Equal(spy, memfs.Must(memfs.UnmarshalTab(cas.fs))) {
t.Errorf("want Compare(...)=true; got false (i=%d)", i)
}
}
}