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package libhosty
import (
"runtime"
"strings"
"testing"
)
//TestParseHostsFile implicitly tests parser()
// assuming the test is executed on a computer,
// we should be able to load the default hosts file
func TestParseHostsFile(t *testing.T) {
var path string
// check for invalid path
path = "/my/custom/invalid/path/hosts"
_, err := ParseHostsFile(path)
if err == nil {
t.Fatalf("should fail with invalid path: %s", path)
}
// define file path
switch runtime.GOOS {
case "win":
path = "C:\\Windows\\System32\\drivers\\etc\\hosts"
default:
path = "/etc/hosts"
}
// parse file
hf, err := ParseHostsFile(path)
// check for errors
if err != nil {
t.Fatalf("error parsing hosts file: %s", err)
}
// check for unknown lines
// this can be a false positive if the line is actually invalid
// also we assume to have no unknown line in a standard system
// but we left it to ensure correct lines are not recognized as unknown lines
//
// edit: this now breaks the github automatic build due to https://github.com/actions/virtual-environments/issues/3353
// so we must comment this out
//
// for k, v := range hf {
// if v.Type == LineTypeUnknown {
// t.Fatalf("unable to parse line at index %d: %s", k, v.Raw)
// }
// }
// for every address line, ensure we have a valid ip address
for k, v := range hf {
if v.Type == LineTypeAddress {
if v.Address == nil {
t.Fatalf("address line without address at index %d: %v", k, v)
}
}
}
// for every comment line ensure it starts with #
for k, v := range hf {
if v.Type == LineTypeComment {
if !strings.HasPrefix(v.Raw, "#") {
t.Fatalf("comment line does not starts with # at index %d: %v", k, v)
}
}
}
}
//TestParseHostsFileAsString test unknown line type
// actual parsing is already tested in TestParseHostsFile()
func TestParseHostsFileAsString(t *testing.T) {
// define a custom hosts file with an address line and an invalid line"
var fakeHostsFile = `1.1.1.1 my.hosts.file # With Comment
129dj120isdj12i0 1092jd 210dk`
hf, err := ParseHostsFileAsString(fakeHostsFile)
if err != nil {
t.Fatalf("error parsing fakeHostsFile: %s", err)
}
// we expect the 1st line to be of type address
if hf[0].Type != LineTypeAddress {
t.Fatalf("line should be of type address: %v", hf[0])
}
// and the 2nd line to be of type unknown
if hf[1].Type != LineTypeUnknown {
t.Fatalf("line should be of type address: %v", hf[1])
}
}
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