package link

import (
	"strings"
	"testing"
)

func TestValidateHTTPURL(t *testing.T) {
	tests := []struct {
		name    string
		value   string
		wantErr string
	}{
		{name: "http", value: "http://reports.example.com/archive"},
		{name: "https", value: "https://reports.example.com/archive"},
		{name: "missing host", value: "https:///archive", wantErr: "must include a host"},
		{name: "unsupported scheme", value: "ftp://reports.example.com/archive", wantErr: "must use http or https"},
		{name: "query string", value: "https://reports.example.com/archive?preview=1", wantErr: "must not include a query string"},
		{name: "fragment", value: "https://reports.example.com/archive#top", wantErr: "must not include a fragment"},
		{name: "parse failure", value: "http://[::1", wantErr: "must be a valid URL"},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := ValidateHTTPURL(tt.value)
			if tt.wantErr == "" {
				if err != nil {
					t.Fatalf("ValidateHTTPURL() error = %v", err)
				}
				return
			}
			if err == nil {
				t.Fatal("ValidateHTTPURL() error = nil, want error")
			}
			if !strings.Contains(err.Error(), tt.wantErr) {
				t.Fatalf("ValidateHTTPURL() error = %q, want %q", err, tt.wantErr)
			}
		})
	}
}