fs_test.go

package main

import (
	"io/ioutil"
	"os/exec"
	"strings"
	"testing"
)

func ReadTestFile(arg string) []string {
	data, err := ioutil.ReadFile(arg)
	if err != nil {
		panic(err)
	}

	contentString := string(data)

	contentSplit := strings.Split(contentString, "#")

	return contentSplit
}

func TestAsciiArt(t *testing.T) {
	testCases := []string{
		"hello",
		"HELLO",
		"HeLlo HuMaN",
		"1Hello 2There",
		"Hello\\nThere",
		"{Hello & There #}",
		"hello There 1 to 2!",
		"MaD3IrA&LiSboN",
		"1a\"#FdwHywR&/()=",
		"{|}~",
		"[\\]^_ 'a",
		"RGB",
		":;<=>?@",
		"\\!\" #$%&'()*+,-./",
		"ABCDEFGHIJKLMNOPQRSTUVWXYZ",
		"abcdefghijklmnopqrstuvwxyz",
		"nice 2 meet you",
		"It's Working",
	}

	banner := []string{
		"standard",
		"shadow",
		"thinkertoy",
	}
	filename := []string{
		"standardoutput.txt",
		"shadowoutput.txt",
		"thinkertoyoutput.txt",
	}
	for i := range banner {
		expectedOutput := ReadTestFile(filename[i])

		for index, testCase := range testCases {
			cmd := exec.Command("go", "run", ".", testCase, banner[i])

			output, _ := cmd.Output()

			if string(output) != expectedOutput[index] {
				t.Errorf("\nTest fails when given case:\n\t\"%s\","+"\nThe test should show:\n%s\nInstead it shows:\n%s", testCase, expectedOutput[index], output)
			}
		}
	}
}