core: Remove StringList

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This commit is contained in:
James Nugent 2016-04-24 00:59:43 -05:00
parent f49583d25a
commit 244da895cd
2 changed files with 0 additions and 141 deletions

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@ -1,89 +0,0 @@
package config
import (
"fmt"
"strings"
)
// StringList represents the "poor man's list" that terraform uses
// internally
type StringList string
// This is the delimiter used to recognize and split StringLists
//
// It plays two semantic roles:
// * It introduces a list
// * It terminates each element
//
// Example representations:
// [] => SLD
// [""] => SLDSLD
// [" "] => SLD SLD
// ["foo"] => SLDfooSLD
// ["foo", "bar"] => SLDfooSLDbarSLD
// ["", ""] => SLDSLDSLD
const stringListDelim = `B780FFEC-B661-4EB8-9236-A01737AD98B6`
// Takes a Stringlist and returns one without empty strings in it
func (sl StringList) Compact() StringList {
parts := sl.Slice()
newlist := []string{}
// drop the empty strings
for i := range parts {
if parts[i] != "" {
newlist = append(newlist, parts[i])
}
}
return NewStringList(newlist)
}
// Build a StringList from a slice
func NewStringList(parts []string) StringList {
// We have to special case the empty list representation
if len(parts) == 0 {
return StringList(stringListDelim)
}
return StringList(fmt.Sprintf("%s%s%s",
stringListDelim,
strings.Join(parts, stringListDelim),
stringListDelim,
))
}
// Returns an element at the index, wrapping around the length of the string
// when index > list length
func (sl StringList) Element(index int) string {
if sl.Length() == 0 {
return ""
}
return sl.Slice()[index%sl.Length()]
}
// Returns the length of the StringList
func (sl StringList) Length() int {
return len(sl.Slice())
}
// Returns a slice of strings as represented by this StringList
func (sl StringList) Slice() []string {
parts := strings.Split(string(sl), stringListDelim)
// split on an empty StringList will have a length of 2, since there is
// always at least one deliminator
if len(parts) <= 2 {
return []string{}
}
// strip empty elements generated by leading and trailing delimiters
return parts[1 : len(parts)-1]
}
func (sl StringList) String() string {
return string(sl)
}
// Determines if a given string represents a StringList
func IsStringList(s string) bool {
return strings.Contains(s, stringListDelim)
}

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@ -1,52 +0,0 @@
package config
import (
"reflect"
"testing"
)
func TestStringList_slice(t *testing.T) {
expected := []string{"apple", "banana", "pear"}
l := NewStringList(expected)
actual := l.Slice()
if !reflect.DeepEqual(expected, actual) {
t.Fatalf("Expected %q, got %q", expected, actual)
}
}
func TestStringList_element(t *testing.T) {
list := []string{"apple", "banana", "pear"}
l := NewStringList(list)
actual := l.Element(1)
expected := "banana"
if actual != expected {
t.Fatalf("Expected 2nd element from %q to be %q, got %q",
list, expected, actual)
}
}
func TestStringList_empty_slice(t *testing.T) {
expected := []string{}
l := NewStringList(expected)
actual := l.Slice()
if !reflect.DeepEqual(expected, actual) {
t.Fatalf("Expected %q, got %q", expected, actual)
}
}
func TestStringList_empty_slice_length(t *testing.T) {
list := []string{}
l := NewStringList([]string{})
actual := l.Length()
expected := 0
if actual != expected {
t.Fatalf("Expected length of %q to be %d, got %d",
list, expected, actual)
}
}