Merge branch 'reversemap' into 'master'

Add reversemap task

See merge request slon/shad-go-private!27
This commit is contained in:
Fedor Korotkiy 2020-04-16 11:23:12 +00:00
commit 82ce3ce8ab
3 changed files with 77 additions and 0 deletions

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reversemap/README.md Normal file
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# reversemap
Реализуйте функцию reversemap, которая принимает на вход любой `map[K]V`,
и возвращает обращённый `map[V]K`.
Считайте, что все ключи и значения в исходном `map` уникальны.

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reversemap/reversemap.go Normal file
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// +build !solution
package reversemap
func ReverseMap(forward interface{}) interface{} {
panic("implement me")
}

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package reversemap
import (
"reflect"
"testing"
"github.com/stretchr/testify/assert"
)
func TestReverseMap(t *testing.T) {
data := []struct {
forward interface{}
backward interface{}
}{
{
forward: map[string]string{
"k1": "v1",
"k2": "v2",
"k3": "v3",
},
backward: map[string]string{
"v1": "k1",
"v2": "k2",
"v3": "k3",
},
},
{
forward: map[int]string{
1: "v1",
2: "v2",
3: "v3",
},
backward: map[string]int{
"v1": 1,
"v2": 2,
"v3": 3,
},
},
{
forward: map[int]int{
1: 4,
2: 5,
3: 6,
},
backward: map[int]int{
4: 1,
5: 2,
6: 3,
},
},
}
for _, d := range data {
t.Run(reflect.TypeOf(d.forward).String(), func(t *testing.T) {
assert.Equal(t, d.backward, ReverseMap(d.forward))
assert.Equal(t, d.forward, ReverseMap(d.backward))
})
}
}
func TestReverseInt(t *testing.T) {
assert.Panics(t, func() {
ReverseMap(new(int))
})
}