[llgo] cmd/llgoi: use line editor
Summary:
This diff adds line-editing to llgoi, by
vendoring and using github.com/peterh/liner.
I have only implemented the basics here;
follow-ups will come later to add persisted
history, and completion,
Reviewers: pcc
Reviewed By: pcc
Subscribers: axw, llvm-commits
Differential Revision: http://reviews.llvm.org/D9811
llvm-svn: 238100
diff --git a/llgo/third_party/liner/width_test.go b/llgo/third_party/liner/width_test.go
new file mode 100644
index 0000000..add779c
--- /dev/null
+++ b/llgo/third_party/liner/width_test.go
@@ -0,0 +1,102 @@
+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")
+ }
+ }
+}