func TestSplitTweets(t *testing.T) {
	dummyText := `Lorem Ipsum is simply dummy text of the printing and typesetting industry░. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen.`
	split := splitTweets(dummyText, 76)
	if len(split) != 4 {
		t.Fatalf("expected len 4 got %d", len(split))
	}
	if firstChar := string(split[1][0]); firstChar != "i" {
		t.Fatalf("expected first letter of second sentence to begin with i got %s", firstChar)
	}
}
this test is really just to make sure the split happens at a space on or before the breakpoint,
and that the block character (and others like emoji) are counted as two characters,
the split point of 76 is because the 76th character is the block.
package main
import (
	"encoding/json"
	"os"
	"testing"
)