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package asciiset
import (
"strings"
"testing"
)
func TestMakeASCIISet(t *testing.T) {
if _, ok := MakeASCIISet("@J"); !ok {
t.Errorf(`MakeASCIISet should identify "@J" as all ASCII`)
}
if _, ok := MakeASCIISet("@\u00f8"); ok {
t.Errorf(`MakeASCIISet should identify "@\u00f8" as not all ASCII`)
}
}
func TestAdd(t *testing.T) {
chars := "@J"
var as ASCIISet
for _, c := range chars {
as.Add(byte(c))
if !as.Contains(byte(c)) {
t.Errorf("ASCIISet should contain %s", string(c))
}
}
britishPound := byte('£')
as.Add(britishPound)
if as.Contains(britishPound) {
t.Errorf("ASCIISet should not contain %s", string(britishPound))
}
}
func TestContains(t *testing.T) {
as, _ := MakeASCIISet("@J")
if as.Contains('5') {
t.Errorf("ASCIISet should not contain 5")
}
}
func TestRemove(t *testing.T) {
chars := "@J"
as, _ := MakeASCIISet(chars)
as.Remove('@')
if as.Contains('@') {
t.Errorf("ASCIISet should not contain @")
}
if !as.Contains('J') {
t.Errorf("ASCIISet should contain J")
}
}
func TestSize(t *testing.T) {
as, _ := MakeASCIISet("ABCD")
if size := as.Size(); size != 4 {
t.Errorf("Expected Size 4, got %d", size)
}
}
func TestUnion(t *testing.T) {
as, _ := MakeASCIISet("ABCD")
as2, _ := MakeASCIISet("CDEF")
as3 := as.Union(as2)
for _, c := range "ABCDEF" {
if !as3.Contains(byte(c)) {
t.Errorf("ASCIISet should contain %s", string(c))
}
}
}
func TestIntersection(t *testing.T) {
as, _ := MakeASCIISet("ABCD")
as2, _ := MakeASCIISet("CDEF")
as3 := as.Intersection(as2)
for _, c := range "CD" {
if !as3.Contains(byte(c)) {
t.Errorf("ASCIISet should contain %s", string(c))
}
}
for _, c := range "ABEF" {
if as3.Contains(byte(c)) {
t.Errorf("ASCIISet should not contain %s", string(c))
}
}
}
func TestSubtract(t *testing.T) {
as, _ := MakeASCIISet("ABCD")
as2, _ := MakeASCIISet("CDEF")
as3 := as.Subtract(as2)
for _, c := range "AB" {
if !as3.Contains(byte(c)) {
t.Errorf("ASCIISet should contain %s", string(c))
}
}
for _, c := range "CDEF" {
if as3.Contains(byte(c)) {
t.Errorf("ASCIISet should not contain %s", string(c))
}
}
}
func TestEquals(t *testing.T) {
as, _ := MakeASCIISet("ABCD")
as2, _ := MakeASCIISet("ABCD")
if !as.Equals(as2) {
t.Errorf("as should be equal to as2")
}
}
func TestVisit(t *testing.T) {
// chars must be all unique and in ascending order
chars := "123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ"
as, _ := MakeASCIISet(chars)
// scenario: visit every character in the set
output := make([]byte, 0, len(chars))
as.Visit(func(n byte) bool {
if as.Contains(n) {
output = append(output, n)
}
return false
})
if len(output) != len(chars) {
t.Errorf("output length must be %d; visit every character. Got %d", len(chars), len(output))
}
for i := 0; i < len(chars); i++ {
if output[i] != byte(chars[i]) {
t.Errorf("%d %d", output[i], byte(chars[i]))
}
}
// scenario: stop early at 'T'
output = make([]byte, 0, strings.Index(chars, "T")+1)
as.Visit(func(n byte) bool {
if as.Contains(n) {
output = append(output, n)
}
return n == 'T'
})
if len(output) != strings.Index(chars, "T")+1 {
t.Errorf("output length must be %d; stop early at 'T'. Got %d", strings.Index(chars, "T")+1, len(output))
}
for i := 0; i < strings.Index(chars, "T")+1; i++ {
if output[i] != byte(chars[i]) {
t.Errorf("%d %d", output[i], byte(chars[i]))
}
}
// scenario: Add extra '\n'
output = make([]byte, 0, len(chars))
as.Visit(func(n byte) bool {
as.Add('\n')
if as.Contains(n) {
output = append(output, n)
}
return false
})
if as.Size() != len(chars)+1 {
t.Errorf("as.Size() must be %d; visit every character and add extra '\n'. Got %d", len(chars)+1, as.Size())
}
if len(output) != len(chars) {
t.Errorf("output length must be %d; visit every character and add extra '\n'. Got %d", len(chars), len(output))
}
for i := 0; i < len(chars); i++ {
if output[i] != byte(chars[i]) {
t.Errorf("%d %d", output[i], byte(chars[i]))
}
}
// scenario: Remove extra '\n'
output = make([]byte, 0, len(chars))
as.Visit(func(n byte) bool {
as.Remove('\n')
if as.Contains(n) {
output = append(output, n)
}
return false
})
if as.Size() != len(chars) {
t.Errorf("as.Size() must be %d; visit every character and remove extra '\n'. Got %d", len(chars), as.Size())
}
if len(output) != len(chars) {
t.Errorf("output length must be %d; visit every character and remove extra '\n'. Got %d", len(chars), len(output))
}
for i := 0; i < len(chars); i++ {
if output[i] != byte(chars[i]) {
t.Errorf("%d %d", output[i], byte(chars[i]))
}
}
}
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