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collections.go
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collections.go
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// MIT License. Copyright (c) 2020 CQFN
// https://github.com/g4s8/go-matchers/blob/master/LICENSE
package matchers
import (
"fmt"
r "reflect"
)
type mLen struct {
expect Matcher
}
func (m *mLen) Check(target interface{}) bool {
val := r.ValueOf(target)
// val.Len() panics if v's Kind is not Array, Chan, Map, Slice, or String.
if !kindAnyOf(val.Kind(), r.Array, r.Chan, r.Map, r.Slice, r.String) {
return false
}
return m.expect.Check(val.Len())
}
func (m *mLen) String() string {
return fmt.Sprintf("has length %s", m.expect)
}
// LenIs of array, map, chan, slice or string exact matcher
func LenIs(expect int) Matcher {
return Len(Is(expect))
}
// Len of array, map, chan, slice or string matcher
func Len(matcher Matcher) Matcher {
return &mLen{matcher}
}
type mHasItem struct {
m Matcher
}
func (m *mHasItem) Check(target interface{}) bool {
val := r.ValueOf(target)
if !kindAnyOf(val.Kind(), r.Array, r.Slice, r.String) {
return false
}
isStr := val.Kind() == r.String
size := val.Len()
for i := 0; i < size; i++ {
idx := val.Index(i).Interface()
if isStr {
idx = rune(idx.(uint8))
}
if m.m.Check(idx) {
return true
}
}
return false
}
func (m *mHasItem) String() string {
return fmt.Sprintf("has item %s", m.m)
}
// HasItem checks if collection has an item matches to item matcher
func HasItem(m Matcher) Matcher {
return &mHasItem{m}
}
// HasItemEq checks if collection has an item equal to expected
func HasItemEq(item interface{}) Matcher {
return HasItem(Eq(item))
}