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package mounts // import "github.com/docker/docker/volume/mounts"
import (
"fmt"
"strings"
"testing"
"github.com/docker/docker/api/types/mount"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func TestLinuxParseMountRaw(t *testing.T) {
valid := []string{
"/home",
"/home:/home",
"/home:/something/else",
"/with space",
"/home:/with space",
"relative:/absolute-path",
"hostPath:/containerPath:ro",
"/hostPath:/containerPath:rw",
"/rw:/ro",
"/hostPath:/containerPath:shared",
"/hostPath:/containerPath:rshared",
"/hostPath:/containerPath:slave",
"/hostPath:/containerPath:rslave",
"/hostPath:/containerPath:private",
"/hostPath:/containerPath:rprivate",
"/hostPath:/containerPath:ro,shared",
"/hostPath:/containerPath:ro,slave",
"/hostPath:/containerPath:ro,private",
"/hostPath:/containerPath:ro,z,shared",
"/hostPath:/containerPath:ro,Z,slave",
"/hostPath:/containerPath:Z,ro,slave",
"/hostPath:/containerPath:slave,Z,ro",
"/hostPath:/containerPath:Z,slave,ro",
"/hostPath:/containerPath:slave,ro,Z",
"/hostPath:/containerPath:rslave,ro,Z",
"/hostPath:/containerPath:ro,rshared,Z",
"/hostPath:/containerPath:ro,Z,rprivate",
}
invalid := map[string]string{
"": "invalid volume specification",
"./": "mount path must be absolute",
"../": "mount path must be absolute",
"/:../": "mount path must be absolute",
"/:path": "mount path must be absolute",
":": "invalid volume specification",
"/tmp:": "invalid volume specification",
":test": "invalid volume specification",
":/test": "invalid volume specification",
"tmp:": "invalid volume specification",
":test:": "invalid volume specification",
"::": "invalid volume specification",
":::": "invalid volume specification",
"/tmp:::": "invalid volume specification",
":/tmp::": "invalid volume specification",
"/path:rw": "invalid volume specification",
"/path:ro": "invalid volume specification",
"/rw:rw": "invalid volume specification",
"path:ro": "invalid volume specification",
"/path:/path:sw": `invalid mode`,
"/path:/path:rwz": `invalid mode`,
"/path:/path:ro,rshared,rslave": `invalid mode`,
"/path:/path:ro,z,rshared,rslave": `invalid mode`,
"/path:shared": "invalid volume specification",
"/path:slave": "invalid volume specification",
"/path:private": "invalid volume specification",
"name:/absolute-path:shared": "invalid volume specification",
"name:/absolute-path:rshared": "invalid volume specification",
"name:/absolute-path:slave": "invalid volume specification",
"name:/absolute-path:rslave": "invalid volume specification",
"name:/absolute-path:private": "invalid volume specification",
"name:/absolute-path:rprivate": "invalid volume specification",
}
parser := NewLinuxParser()
if p, ok := parser.(*linuxParser); ok {
p.fi = mockFiProvider{}
}
for _, path := range valid {
if _, err := parser.ParseMountRaw(path, "local"); err != nil {
t.Errorf("ParseMountRaw(`%q`) should succeed: error %q", path, err)
}
}
for path, expectedError := range invalid {
if mp, err := parser.ParseMountRaw(path, "local"); err == nil {
t.Errorf("ParseMountRaw(`%q`) should have failed validation. Err '%v' - MP: %v", path, err, mp)
} else {
if !strings.Contains(err.Error(), expectedError) {
t.Errorf("ParseMountRaw(`%q`) error should contain %q, got %v", path, expectedError, err.Error())
}
}
}
}
func TestLinuxParseMountRawSplit(t *testing.T) {
cases := []struct {
bind string
driver string
expType mount.Type
expDest string
expSource string
expName string
expDriver string
expRW bool
fail bool
}{
{
bind: "/tmp:/tmp1",
expType: mount.TypeBind,
expDest: "/tmp1",
expSource: "/tmp",
expRW: true,
},
{
bind: "/tmp:/tmp2:ro",
expType: mount.TypeBind,
expDest: "/tmp2",
expSource: "/tmp",
},
{
bind: "/tmp:/tmp3:rw",
expType: mount.TypeBind,
expDest: "/tmp3",
expSource: "/tmp",
expRW: true,
},
{
bind: "/tmp:/tmp4:foo",
expType: mount.TypeBind,
fail: true,
},
{
bind: "name:/named1",
expType: mount.TypeVolume,
expDest: "/named1",
expName: "name",
expRW: true,
},
{
bind: "name:/named2",
driver: "external",
expType: mount.TypeVolume,
expDest: "/named2",
expName: "name",
expDriver: "external",
expRW: true,
},
{
bind: "name:/named3:ro",
driver: "local",
expType: mount.TypeVolume,
expDest: "/named3",
expName: "name",
expDriver: "local",
},
{
bind: "local/name:/tmp:rw",
expType: mount.TypeVolume,
expDest: "/tmp",
expName: "local/name",
expRW: true,
},
{
bind: "/tmp:tmp",
expType: mount.TypeBind,
expRW: true,
fail: true,
},
}
parser := NewLinuxParser()
if p, ok := parser.(*linuxParser); ok {
p.fi = mockFiProvider{}
}
for _, tc := range cases {
tc := tc
t.Run(tc.bind, func(t *testing.T) {
m, err := parser.ParseMountRaw(tc.bind, tc.driver)
if tc.fail {
assert.Check(t, is.ErrorContains(err, ""), "expected an error")
return
}
assert.NilError(t, err)
assert.Check(t, is.Equal(m.Destination, tc.expDest))
assert.Check(t, is.Equal(m.Source, tc.expSource))
assert.Check(t, is.Equal(m.Name, tc.expName))
assert.Check(t, is.Equal(m.Driver, tc.expDriver))
assert.Check(t, is.Equal(m.RW, tc.expRW))
assert.Check(t, is.Equal(m.Type, tc.expType))
})
}
}
// TestLinuxParseMountSpecBindWithFileinfoError makes sure that the parser returns
// the error produced by the fileinfo provider.
//
// Some extra context for the future in case of changes and possible wtf are we
// testing this for:
//
// Currently this "fileInfoProvider" returns (bool, bool, error)
// The 1st bool is "does this path exist"
// The 2nd bool is "is this path a dir"
// Then of course the error is an error.
//
// The issue is the parser was ignoring the error and only looking at the
// "does this path exist" boolean, which is always false if there is an error.
// Then the error returned to the caller was a (slightly, maybe) friendlier
// error string than what comes from `os.Stat`
// So ...the caller was always getting an error saying the path doesn't exist
// even if it does exist but got some other error (like a permission error).
// This is confusing to users.
func TestLinuxParseMountSpecBindWithFileinfoError(t *testing.T) {
parser := NewLinuxParser()
testErr := fmt.Errorf("some crazy error")
if pr, ok := parser.(*linuxParser); ok {
pr.fi = &mockFiProviderWithError{err: testErr}
}
_, err := parser.ParseMountSpec(mount.Mount{
Type: mount.TypeBind,
Source: `/bananas`,
Target: `/bananas`,
})
assert.ErrorContains(t, err, testErr.Error())
}
func TestConvertTmpfsOptions(t *testing.T) {
type testCase struct {
opt mount.TmpfsOptions
readOnly bool
expectedSubstrings []string
unexpectedSubstrings []string
err bool
}
cases := []testCase{
{
opt: mount.TmpfsOptions{SizeBytes: 1024 * 1024, Mode: 0o700},
readOnly: false,
expectedSubstrings: []string{"size=1m", "mode=700"},
unexpectedSubstrings: []string{"ro"},
},
{
opt: mount.TmpfsOptions{},
readOnly: true,
expectedSubstrings: []string{"ro"},
unexpectedSubstrings: []string{},
},
{
opt: mount.TmpfsOptions{Options: [][]string{{"exec"}}},
readOnly: true,
expectedSubstrings: []string{"ro", "exec"},
unexpectedSubstrings: []string{"noexec"},
},
{
opt: mount.TmpfsOptions{Options: [][]string{{"INVALID"}}},
err: true,
},
}
p := NewLinuxParser()
for _, tc := range cases {
data, err := p.ConvertTmpfsOptions(&tc.opt, tc.readOnly)
if tc.err {
if err == nil {
t.Fatalf("expected error for %+v, got nil", tc.opt)
}
continue
}
if err != nil {
t.Fatalf("could not convert %+v (readOnly: %v) to string: %v",
tc.opt, tc.readOnly, err)
}
t.Logf("data=%q", data)
for _, s := range tc.expectedSubstrings {
if !strings.Contains(data, s) {
t.Fatalf("expected substring: %s, got %v (case=%+v)", s, data, tc)
}
}
for _, s := range tc.unexpectedSubstrings {
if strings.Contains(data, s) {
t.Fatalf("unexpected substring: %s, got %v (case=%+v)", s, data, tc)
}
}
}
}
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