public async Task ShouldChangeText_InvalidRange_ThrowsArgumentOutOfRangeException()
{
var result = Helpers.RunOnUIThreadAsync(() =>
{
var textField = new UITextField();
var filter = new LengthFilter(0);
var range = new NSRange(0, 1000);
return(filter.ShouldChangeText(textField, "old", range, "new"));
});
await Assert.ThrowsAsync <ArgumentOutOfRangeException>(() => result);
}
public async Task ShouldChangeText_UITextField_ReturnsExpected(
string oldText,
int insertPosition,
string newText,
int maxLength,
bool expectedResult)
{
var result = await Helpers.RunOnUIThreadAsync(() =>
{
var textField = new UITextField();
var range = new NSRange(insertPosition, 0);
var filter = new LengthFilter(maxLength);
return(filter.ShouldChangeText(textField, oldText, range, newText));
});
Assert.Equal(expectedResult, result);
}
public async Task ShouldChangeText_UITextFieldWithCharacterOverwritingEnabled_ReturnsExpected(
string oldText,
int insertPosition,
string newText,
int maxLength,
string expectedResult)
{
var result = await Helpers.RunOnUIThreadAsync(() =>
{
var textField = new UITextField {
Text = oldText
};
var range = new NSRange(insertPosition, 0);
var filter = new LengthFilter(maxLength);
filter.IsCharacterOverwritingEnabled = true;
filter.ShouldChangeText(textField, oldText, range, newText);
return(textField.Text);
});
Assert.Equal(expectedResult, result);
}