width_test.go
2.54 KB
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package liner
import (
"strconv"
"testing"
)
func accent(in []rune) []rune {
var out []rune
for _, r := range in {
out = append(out, r)
out = append(out, '\u0301')
}
return out
}
type testCase struct {
s []rune
glyphs int
}
var testCases = []testCase{
{[]rune("query"), 5},
{[]rune("私"), 2},
{[]rune("hello世界"), 9},
}
func TestCountGlyphs(t *testing.T) {
for _, testCase := range testCases {
count := countGlyphs(testCase.s)
if count != testCase.glyphs {
t.Errorf("ASCII count incorrect. %d != %d", count, testCase.glyphs)
}
count = countGlyphs(accent(testCase.s))
if count != testCase.glyphs {
t.Errorf("Accent count incorrect. %d != %d", count, testCase.glyphs)
}
}
}
func compare(a, b []rune, name string, t *testing.T) {
if len(a) != len(b) {
t.Errorf(`"%s" != "%s" in %s"`, string(a), string(b), name)
return
}
for i := range a {
if a[i] != b[i] {
t.Errorf(`"%s" != "%s" in %s"`, string(a), string(b), name)
return
}
}
}
func TestPrefixGlyphs(t *testing.T) {
for _, testCase := range testCases {
for i := 0; i <= len(testCase.s); i++ {
iter := strconv.Itoa(i)
out := getPrefixGlyphs(testCase.s, i)
compare(out, testCase.s[:i], "ascii prefix "+iter, t)
out = getPrefixGlyphs(accent(testCase.s), i)
compare(out, accent(testCase.s[:i]), "accent prefix "+iter, t)
}
out := getPrefixGlyphs(testCase.s, 999)
compare(out, testCase.s, "ascii prefix overflow", t)
out = getPrefixGlyphs(accent(testCase.s), 999)
compare(out, accent(testCase.s), "accent prefix overflow", t)
out = getPrefixGlyphs(testCase.s, -3)
if len(out) != 0 {
t.Error("ascii prefix negative")
}
out = getPrefixGlyphs(accent(testCase.s), -3)
if len(out) != 0 {
t.Error("accent prefix negative")
}
}
}
func TestSuffixGlyphs(t *testing.T) {
for _, testCase := range testCases {
for i := 0; i <= len(testCase.s); i++ {
iter := strconv.Itoa(i)
out := getSuffixGlyphs(testCase.s, i)
compare(out, testCase.s[len(testCase.s)-i:], "ascii suffix "+iter, t)
out = getSuffixGlyphs(accent(testCase.s), i)
compare(out, accent(testCase.s[len(testCase.s)-i:]), "accent suffix "+iter, t)
}
out := getSuffixGlyphs(testCase.s, 999)
compare(out, testCase.s, "ascii suffix overflow", t)
out = getSuffixGlyphs(accent(testCase.s), 999)
compare(out, accent(testCase.s), "accent suffix overflow", t)
out = getSuffixGlyphs(testCase.s, -3)
if len(out) != 0 {
t.Error("ascii suffix negative")
}
out = getSuffixGlyphs(accent(testCase.s), -3)
if len(out) != 0 {
t.Error("accent suffix negative")
}
}
}