Gotest-不能在字段值中将[] int文字（类型[] int）用作args类型

Question

I am trying to test a basic sum function with a table test. Here is the function:

func Sum(nums []int) int {
    sum := 0
    for _, n := range nums {
        sum += n
    }
    return sum
}

I do know that the error is with the table args, but I don't understand why Golang will not accept the tests. It would be great to have some clarity. See test below and error:

import (
    "testing"
)

func TestSum(t *testing.T) {

    type args struct {
        nums []int
    }
    tests := []struct {
        name string
        args args
        want int
    }{
        {"test", []int{3, 4}, 7},
        {"test", []int{3, 3}, 6},

    }
    for _, tt := range tests {
        t.Run(tt.name, func(t *testing.T) {
            if got := Sum(tt.args.nums); got != tt.want {
                t.Errorf("Sum() = %v, want %v", got, tt.want)
            }
        })
    }
}

cannot use []int literal (type []int) as type args in field value

Answer 1

It's because the second field of your anonymous structure is args, not []nums

You should initialize it as with an explicitly typed args value.

{"test", args{nums: []int{3, 4}}, 7},

Or, if you prefer the field-less struct literals:

{"test", args{[]int{3, 4}}, 7},