package validation

import (
	"testing"
)

func TestRequired(t *testing.T) {
	cfg := &ComponentConfig{}
	Required()(cfg)

	if len(cfg.Validators) != 1 {
		t.Fatalf("expect 1 validator, got %d", len(cfg.Validators))
	}

	validate := cfg.Validators[0]

	tests := []struct {
		name    string
		value   any
		wantErr bool
	}{
		{"nil value", nil, true},
		{"empty string", "", true},
		{"non-empty string", "hello", false},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := validate(tt.value)
			if (err != nil) != tt.wantErr {
				t.Errorf("validate(%v) error = %v, wantErr %v", tt.value, err, tt.wantErr)
			}
		})
	}
}