public void IsOpenXml_EmptyString_ReturnsFalse()
{
string filename = string.Empty;
const bool expected = false;
bool result = ExcelFileType.IsOpenXml(filename);
result.Should().Be(expected);
}
public void IsOpenXml_xlsxExtensionUppercase_ReturnsTrue()
{
string filename = "file.XLSX";
const bool expected = true;
bool result = ExcelFileType.IsOpenXml(filename);
result.Should().Be(expected);
}
public void IsOpenXml_xlsExtensionLowercase_ReturnsFalse()
{
string filename = "file.xls";
const bool expected = false;
bool result = ExcelFileType.IsOpenXml(filename);
result.Should().Be(expected);
}
public void IsOpenXml_NonExcelExtension_ReturnsFalse()
{
string filename = "file.txt";
const bool expected = false;
bool result = ExcelFileType.IsOpenXml(filename);
result.Should().Be(expected);
}