file_test.go•1.62 kB
package osutil_test
import (
"testing"
"github.com/yoheimuta/protolint/internal/osutil"
)
func TestDetectLineEnding(t *testing.T) {
tests := []struct {
name string
input string
want string
wantExistErr bool
}{
{
name: "An empty string has no line ending",
input: ``,
},
{
name: "a line string has no line ending",
input: `first line`,
},
{
name: "two lines have \n",
input: `first line
second line`,
want: "\n",
},
{
name: "two lines have \r",
input: `first line` + "\r" + `second line`,
want: "\r",
},
{
name: "two lines have \r\n",
input: `first line` + "\r\n" + `second line`,
want: "\r\n",
},
{
name: "two lines have a mix of \n and \r, and \n is more",
input: `first line
second line
third line` + "\r" + `forth line`,
want: "\n",
},
{
name: "two lines have a mix of \n and \r, and \r is more",
input: `first line
second line` + "\r" + `third line` + "\r" + `forth line`,
want: "\r",
},
{
name: "two lines have a mix of \r\n and \r, and \r\n is more",
input: `first line` + "\r\n" + `second line` + "\r\n" + `third line` +
"\r" + `forth line`,
want: "\r\n",
},
}
for _, test := range tests {
test := test
t.Run(test.name, func(t *testing.T) {
got, err := osutil.DetectLineEnding(test.input)
if test.wantExistErr && err == nil {
t.Errorf("got err nil, but want err")
return
} else if err != nil {
t.Errorf("got err, but want nil")
return
}
if got != test.want {
t.Errorf("got %v, but want %v", got, test.want)
}
})
}
}