53: combinatoric selections

53_combinatoric_selections/main_test.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"math/big"
+	"reflect"
+	"testing"
+)
+
+func Test_factorialOf(t *testing.T) {
+	type args struct {
+		n *big.Int
+	}
+	tests := []struct {
+		name string
+		args args
+		want *big.Int
+	}{
+		{
+			"test1",
+			args{(&big.Int{}).SetInt64(0)},
+			(&big.Int{}).SetInt64(1),
+		},
+		{
+			"test2",
+			args{(&big.Int{}).SetInt64(3)},
+			(&big.Int{}).SetInt64(6),
+		},
+		{
+			"test2",
+			args{(&big.Int{}).SetInt64(5)},
+			(&big.Int{}).SetInt64(120),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := factorialOf(tt.args.n); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("factorialOf() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}