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package writer
import (
"bytes"
"io/ioutil"
"os"
"os/exec"
"testing"
"gitea.com/noerw/unidiff-comments"
)
func TestWillOmitDanglingWhitespaceOnRender(t *testing.T) {
changeset := unidiff.Changeset{
Diffs: []*unidiff.Diff{
{
FileComments: unidiff.CommentsTree{
{
Text: "\n\nevery dangling whitespace \n\n" +
" should be removed\n\n\n",
},
},
},
},
}
buf := bytes.Buffer{}
err := WriteChangeset(changeset, &buf)
if err != nil {
t.Fatal(err)
}
output, err := ioutil.ReadFile(
"../_test/no_dangling_whitespaces.diff")
if string(output) != buf.String() {
t.Log("all dangling whitespaces should be trimmed")
t.Fatal("\n" + makeDiff(buf.String(), string(output)))
}
}
func makeDiff(actual, expected string) string {
a, _ := ioutil.TempFile(os.TempDir(), "actual")
defer func() {
os.Remove(a.Name())
}()
b, _ := ioutil.TempFile(os.TempDir(), "expected")
defer func() {
os.Remove(b.Name())
}()
a.WriteString(actual)
b.WriteString(expected)
cmd := exec.Command("diff", "-u", b.Name(), a.Name())
buf := bytes.NewBuffer([]byte{})
cmd.Stdout = buf
cmd.Run()
return buf.String()
}
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