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package funk
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestForEach(t *testing.T) {
is := assert.New(t)
results := []int{}
ForEach([]int{1, 2, 3, 4}, func(x int) {
if x%2 == 0 {
results = append(results, x)
}
})
is.Equal(results, []int{2, 4})
toModify := []int{1, 2, 3}
ForEach(toModify, func(x *int) { *x = *x * 2 })
is.Equal(toModify, []int{2, 4, 6})
toModify = []int{}
ForEach(toModify, func(x *int) {})
is.Equal(toModify, []int{})
strModify := []string{"a", "b"}
ForEach(strModify, func(s *string) {
*s = *s + *s
})
is.Equal(strModify, []string{"aa", "bb"})
mapping := map[int]string{
1: "Florent",
2: "Gilles",
}
ForEach(mapping, func(k int, v string) {
is.Equal(v, mapping[k])
})
}
func TestForEachRight(t *testing.T) {
is := assert.New(t)
results := []int{}
ForEachRight([]int{1, 2, 3, 4}, func(x int) {
results = append(results, x*2)
})
is.Equal(results, []int{8, 6, 4, 2})
toModify := []int{1, 2, 3}
ForEach(toModify, func(x *int) { *x = *x * 2 })
is.Equal(toModify, []int{2, 4, 6})
toModify = []int{}
ForEach(toModify, func(x *int) {})
is.Equal(toModify, []int{})
strModify := []string{"a", "b"}
ForEach(strModify, func(s *string) {
*s = *s + *s
})
is.Equal(strModify, []string{"aa", "bb"})
mapping := map[int]string{
1: "Florent",
2: "Gilles",
}
mapKeys := []int{}
ForEachRight(mapping, func(k int, v string) {
is.Equal(v, mapping[k])
mapKeys = append(mapKeys, k)
})
is.Equal(len(mapKeys), 2)
is.Contains(mapKeys, 1)
is.Contains(mapKeys, 2)
}
func TestHead(t *testing.T) {
is := assert.New(t)
is.Equal(Head([]int{1, 2, 3, 4}), 1)
}
func TestLast(t *testing.T) {
is := assert.New(t)
is.Equal(Last([]int{1, 2, 3, 4}), 4)
}
func TestTail(t *testing.T) {
is := assert.New(t)
is.Equal(Tail([]int{}), []int{})
is.Equal(Tail([]int{1}), []int{1})
is.Equal(Tail([]int{1, 2, 3, 4}), []int{2, 3, 4})
}
func TestInitial(t *testing.T) {
is := assert.New(t)
is.Equal(Initial([]int{}), []int{})
is.Equal(Initial([]int{1}), []int{1})
is.Equal(Initial([]int{1, 2, 3, 4}), []int{1, 2, 3})
}
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