How to write 100MB string to STDOUT

[Const V]

I'm submitting as a separate post to focus on the following problem I have:

writing 100MB string to STDOUT

w io.Writer

w.Write([]byte(s))

For smaller size string it is working. For bigger

like 100MB it is not.

I'm looking to submit chunks of the string like 1KB subsequently to STDOUT

until all string content is sent.

[Amnon]

How did you reach the conclusion that it is not working?
What is your stdout connected to?

[Const V]

In order to test I temporarily use a pipe in order to get the string from the stdout.

tempStdout := os.Stdout

r, w, _ := os.Pipe()

os.Stdout = w

r1 := bufio.NewReader(file)

s := ReadWithReadLine(r1)

// output to stdout is intercepted in order to get it as a string for testing

InputProcessing(strings.NewReader(s), os.Stdout)

 w.Close()

out, _ := ioutil.ReadAll(r)

os.Stdout = tempStdout

observed := string(out)

later - testing expected and observed outcome

....

if observed == expected {

t.Fatalf("\n%s, \nwant: %s\n", observed, expected)

}

[Amnon]

Why not upload your entire unit test to https://go.dev/play/ so we can have a look at what you are doing?

[Amnon]

From what you did post, the InputProcessing()
line would deadlock, because it is writing a lot of data to tempStdout, while noone is reading it.

I would instead do something like

out := new(bytes.Buffer)
InputProcessing(strings.NewReader(s), out)

observed := out.String()