func (S) TestFilter(c *C) {
p := pipe.Line(
pipe.System("echo out1; echo err1 1>&2; echo out2; echo err2 1>&2; echo out3"),
pipe.Filter(func(line []byte) bool { return string(line) != "out2" }),
)
output, err := pipe.Output(p)
c.Assert(err, IsNil)
c.Assert(string(output), Equals, "out1\nout3\n")
}
func (S) TestFilterNoNewLine(c *C) {
p := pipe.Line(
pipe.Print("out1\nout2\nout3"),
pipe.Filter(func(line []byte) bool { return string(line) != "out2" }),
)
output, err := pipe.Output(p)
c.Assert(err, IsNil)
c.Assert(string(output), Equals, "out1\nout3")
}
func (S) TestLineNesting(c *C) {
b := &bytes.Buffer{}
p := pipe.Line(
pipe.Print("hello"),
pipe.Line(
pipe.Filter(func(line []byte) bool { return true }),
pipe.Exec("sed", "s/l/k/g"),
),
pipe.Write(b),
)
err := pipe.Run(p)
c.Assert(err, IsNil)
c.Assert(b.String(), Equals, "hekko")
}