Example implementation of Zipwhip's Stop Handling. One file, as it is meant to run on the Go Playground

stopLogic.go

package main

import (
	"fmt"
	"strings"
)

func main() {

	testStop()
}

func stop(input string) bool {
	trimmed := strings.TrimSpace(input)  // Remove whitespace characters: space, tab, newline
	words := strings.Split(trimmed, " ") // Split the input into words by the space character

	if len(words) == 1 { // Only if "STOP" is alone do we count it.
		if strings.ToUpper(words[0]) == "STOP" {
			return true
		}
	}
	return false
}

func testStop() {

	inputs := map[string]bool{
		"stop":          true,
		" stop":         true,
		"\tstop":        true,
		"\nstop":        true,
		"stop ":         true,
		"stop\t":        true,
		"stop\n":        true,
		"stop it":       false,
		"Hey, stop it.": false,
	}

	for input, expectedResult := range inputs {
		actualResult := stop(input)
		if actualResult == expectedResult {
			fmt.Println(formatTestOutput("PASS", input, expectedResult, actualResult))
			continue
		}
		fmt.Print(formatTestOutput("FAIL", input, expectedResult, actualResult))
	}
}

func formatTestOutput(result string, input string, expectedResult bool, actualResult bool) string {

	var strFormat = "[%s] - Input: %-15s %25s %-10s %s {%t}"

	input = strings.Replace(input, "\n", "\\n", -1)
	input = strings.Replace(input, "\t", "\\t", -1)

	return fmt.Sprintf(strFormat, result, fmt.Sprintf("[%s]", input), "ExpectedResult:", fmt.Sprintf("{%t}", expectedResult), "ActualResult:", actualResult)
}