func (S) TestReadFileNonExistent(c *C) {
path := filepath.Join(c.MkDir(), "file")
p := pipe.Line(
pipe.ReadFile(path),
pipe.Exec("cat"),
)
output, err := pipe.Output(p)
c.Assert(err, ErrorMatches, "open .*/file: no such file or directory")
c.Assert(output, IsNil)
}
func (S) TestReadFileRelative(c *C) {
dir := c.MkDir()
path := filepath.Join(dir, "file")
err := ioutil.WriteFile(path, []byte("hello"), 0644)
c.Assert(err, IsNil)
p := pipe.Line(
pipe.ReadFile(path),
pipe.Exec("sed", "s/l/k/g"),
)
output, err := pipe.Output(p)
c.Assert(err, IsNil)
c.Assert(string(output), Equals, "hekko")
}
// Dump returns an excutable that will read the given file and dump its contents
// as the Executable's stdout.
func Dump(filename string) Executable {
return Executable{pipe.ReadFile(filename)}
}