ideal • runtime • channels • test_output

static string test transform(string source) pure

return base string • new("+", source, "!")

test case test appender()

the appender : appender[string] • new()

the appender • write("foo")

the appender • write("bar")

the appender • write("baz")

elements : the appender • elements()

assert elements • size == 3

assert elements[0] == "foo"

assert elements[1] == "bar"

assert elements[2] == "baz"

the appender • write all(elements)

more elements : the appender • elements()

assert more elements • size == 6

assert more elements[0] == "foo"

assert more elements[1] == "bar"

assert more elements[2] == "baz"

assert more elements[3] == "foo"

assert more elements[4] == "bar"

assert more elements[5] == "baz"

test case test transformer()

the appender : appender[string] • new()

the transformer : output transformer[string, string] • new(test transform, the appender)

the transformer • write("foo")

the transformer • write("bar")

the transformer • write("baz")

elements : the appender • elements()

assert elements • size == 3

assert elements[0] == "+foo!"

assert elements[1] == "+bar!"

assert elements[2] == "+baz!"