You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: condition_test.go
    path of file: ./repos/aws-sdk-go-v2/feature/dynamodb/expression
    
    the code of the file until where you have to start completion: package expression

import (
	"reflect"
	"strings"
	"testing"

	"github.com/aws/aws-sdk-go-v2/service/dynamodb/types"
)

// condErrorMode will help with error cases and checking error types
type condErrorMode string

const (
	noConditionError condErrorMode = ""
	// unsetCondition error will occur when BuildExpression is called on an empty
	// ConditionBuilder
	unsetCondition = "unset parameter: ConditionBuilder"
	// invalidOperand error will occur when an invalid Operand
    
func TestInBuildCondition(t *testing.T) {
	cases := []struct {
		name      string
		inputCond ConditionBuilder
		expected  string
	}{
		{
			name: "in",
			inputCond: ConditionBuilder{
				operandList: []OperandBuilder{
					NameBuilder{},
					NameBuilder{},
					NameBuilder{},
					NameBuilder{},
					NameBuilder{},
					NameBuilder{},
					NameBuilder{},
				},
				mode: andCond,
			},
			expected: "$c IN ($c, $c, $c, $c, $c, $c)",
		},
	}

	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			en, err := inBuildCondition(c.inputCond, exprNode{})
			if err != nil {
				t.Errorf("expect no error, got unexpected Error %q", err)
			}

			if e, a := c.expected, en.fmtExpr; !reflect.DeepEqual(a, e) {
				t.Errorf("expect %v, got %v", e, a)
			}
		})
	}
}