package importer

import (
	"compress/gzip"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestValidateHeader(t *testing.T) {
	t.Parallel()
	tests := []struct {
		name    string
		header  string
		wantErr bool
	}{
		{name: "approved header", header: strings.Join(expectedHeader, ",")},
		{name: "unknown column", header: "wrong", wantErr: true},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			path := filepath.Join(t.TempDir(), "input.csv.gz")
			file, err := os.Create(path)
			if err != nil {
				t.Fatal(err)
			}
			writer := gzip.NewWriter(file)
			if _, err := writer.Write([]byte(tt.header + "\n")); err != nil {
				t.Fatal(err)
			}
			if err := writer.Close(); err != nil {
				t.Fatal(err)
			}
			if err := file.Close(); err != nil {
				t.Fatal(err)
			}
			err = validateHeader(path)
			if (err != nil) != tt.wantErr {
				t.Fatalf("validateHeader() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}