Add Atoi/Itoa functions and tests

sliceconv.go

@@ -0,0 +1,28 @@
+package sliceconv
+
+import (
+	"github.com/pkg/errors"
+	"strconv"
+)
+
+func Itoa(ints ...int) []string {
+	var str []string
+	for _, i := range ints {
+		str = append(str, strconv.Itoa(i))
+	}
+	return str
+}
+
+func Atoi(str ...string) ([]int, error) {
+	var ints []int
+	for _, s := range str {
+		i, err := strconv.Atoi(s)
+		if err != nil {
+			return nil, errors.Wrap(err, "one or more strings could not be converted to type int")
+		}
+
+		ints = append(ints, i)
+	}
+
+	return ints, nil
+}

sliceconv_test.go

@@ -0,0 +1,55 @@
+package sliceconv
+
+import (
+	"github.com/pkg/errors"
+	"reflect"
+	"testing"
+)
+
+func TestItoa(t *testing.T) {
+	tests := []struct {
+		name        string
+		ints        []int
+		wantStrings []string
+	}{
+		{"Nil slice", nil, nil},
+		{"Empty int slice", []int{}, nil},
+		{"Single int", []int{1}, []string{"1"}},
+		{"Multiple ints", []int{1, 2, 3}, []string{"1", "2", "3"}},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			s := Itoa(test.ints...)
+
+			if !reflect.DeepEqual(s, test.wantStrings) {
+				t.Errorf("got: <%v>, want: <%v>", s, test.wantStrings)
+			}
+		})
+	}
+}
+
+func TestAtoi(t *testing.T) {
+	tests := []struct {
+		name     string
+		strings  []string
+		wantInts []int
+		wantErr  error
+	}{
+		{"Nil slice", nil, nil, nil},
+		{"Empty string slice", []string{}, nil, nil},
+		{"Single string", []string{"1"}, []int{1}, nil},
+		{"Multiple string", []string{"1", "2", "3"}, []int{1, 2, 3}, nil},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			ints, err := Atoi(test.strings...)
+			if errors.Cause(err) != test.wantErr {
+				t.Errorf("got: <%v>, want: <%v>", errors.Cause(err), test.wantErr)
+			}
+
+			if !reflect.DeepEqual(ints, test.wantInts) {
+				t.Errorf("got: <%v>, want: <%v>", ints, test.wantInts)
+			}
+		})
+	}
+}