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moby--moby/runconfig/opts/envfile_test.go

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package opts
import (
"bufio"
"fmt"
"io/ioutil"
"os"
"reflect"
"strings"
"testing"
)
func tmpFileWithContent(content string, t *testing.T) string {
tmpFile, err := ioutil.TempFile("", "envfile-test")
if err != nil {
t.Fatal(err)
}
defer tmpFile.Close()
tmpFile.WriteString(content)
return tmpFile.Name()
}
// Test ParseEnvFile for a file with a few well formatted lines
func TestParseEnvFileGoodFile(t *testing.T) {
content := `foo=bar
baz=quux
# comment
_foobar=foobaz
with.dots=working
and_underscore=working too
`
// Adding a newline + a line with pure whitespace.
// This is being done like this instead of the block above
// because it's common for editors to trim trailing whitespace
// from lines, which becomes annoying since that's the
// exact thing we need to test.
content += "\n \t "
tmpFile := tmpFileWithContent(content, t)
defer os.Remove(tmpFile)
lines, err := ParseEnvFile(tmpFile)
if err != nil {
t.Fatal(err)
}
expectedLines := []string{
"foo=bar",
"baz=quux",
"_foobar=foobaz",
"with.dots=working",
"and_underscore=working too",
}
if !reflect.DeepEqual(lines, expectedLines) {
t.Fatal("lines not equal to expected_lines")
}
}
// Test ParseEnvFile for an empty file
func TestParseEnvFileEmptyFile(t *testing.T) {
tmpFile := tmpFileWithContent("", t)
defer os.Remove(tmpFile)
lines, err := ParseEnvFile(tmpFile)
if err != nil {
t.Fatal(err)
}
if len(lines) != 0 {
t.Fatal("lines not empty; expected empty")
}
}
// Test ParseEnvFile for a non existent file
func TestParseEnvFileNonExistentFile(t *testing.T) {
_, err := ParseEnvFile("foo_bar_baz")
if err == nil {
t.Fatal("ParseEnvFile succeeded; expected failure")
}
if _, ok := err.(*os.PathError); !ok {
t.Fatalf("Expected a PathError, got [%v]", err)
}
}
// Test ParseEnvFile for a badly formatted file
func TestParseEnvFileBadlyFormattedFile(t *testing.T) {
content := `foo=bar
f =quux
`
tmpFile := tmpFileWithContent(content, t)
defer os.Remove(tmpFile)
_, err := ParseEnvFile(tmpFile)
if err == nil {
t.Fatalf("Expected a ErrBadEnvVariable, got nothing")
}
if _, ok := err.(ErrBadEnvVariable); !ok {
t.Fatalf("Expected a ErrBadEnvVariable, got [%v]", err)
}
expectedMessage := "poorly formatted environment: variable 'f ' has white spaces"
if err.Error() != expectedMessage {
t.Fatalf("Expected [%v], got [%v]", expectedMessage, err.Error())
}
}
// Test ParseEnvFile for a file with a line exceeding bufio.MaxScanTokenSize
func TestParseEnvFileLineTooLongFile(t *testing.T) {
content := strings.Repeat("a", bufio.MaxScanTokenSize+42)
content = fmt.Sprint("foo=", content)
tmpFile := tmpFileWithContent(content, t)
defer os.Remove(tmpFile)
_, err := ParseEnvFile(tmpFile)
if err == nil {
t.Fatal("ParseEnvFile succeeded; expected failure")
}
}
// ParseEnvFile with a random file, pass through
func TestParseEnvFileRandomFile(t *testing.T) {
content := `first line
another invalid line`
tmpFile := tmpFileWithContent(content, t)
defer os.Remove(tmpFile)
_, err := ParseEnvFile(tmpFile)
if err == nil {
t.Fatalf("Expected a ErrBadEnvVariable, got nothing")
}
if _, ok := err.(ErrBadEnvVariable); !ok {
t.Fatalf("Expected a ErrBadEnvvariable, got [%v]", err)
}
expectedMessage := "poorly formatted environment: variable 'first line' has white spaces"
if err.Error() != expectedMessage {
t.Fatalf("Expected [%v], got [%v]", expectedMessage, err.Error())
}
}