public void TestDelimitedStringBuilder()
{
DelimitedStringBuilder exceptions = new DelimitedStringBuilder();
Assert.IsTrue(exceptions.IsEmpty(), "No string built.");
exceptions.Add("blah");
Assert.IsFalse(exceptions.IsEmpty(), "String built.");
}
public void It_accepts_a_custom_empty_value()
{
var builder = new DelimitedStringBuilder<int>
{
EmptyValue = "-empty-"
};
var value = builder
.ToString();
Assert.AreEqual("-empty-", value);
}
public void It_accepts_a_custom_separator()
{
var builder = new DelimitedStringBuilder<int>
{
Separator = "|"
};
var value = builder
.Append(1)
.Append(2)
.Append(3)
.ToString();
Assert.AreEqual("1|2|3", value);
}
public void It_accepts_a_custom_formatter()
{
var builder = new DelimitedStringBuilder<int>
{
Formatter = i => i.ToString("x")
};
var value = builder
.Append(1)
.Append(127)
.Append(255)
.ToString();
Assert.AreEqual("1, 7f, ff", value);
}
public void It_accepts_a_prefix_and_suffix_for_each_item()
{
var builder = new DelimitedStringBuilder<int>
{
Prefix = "(",
Suffix = ")"
};
var value = builder
.Append(1)
.Append(2)
.Append(3)
.ToString();
Assert.AreEqual("(1), (2), (3)", value);
}
public void It_accepts_a_header_and_a_prefix_for_the_whole_string()
{
var builder = new DelimitedStringBuilder<int>
{
Header = "{ ",
Footer = " }"
};
var value = builder
.Append(1)
.Append(2)
.Append(3)
.ToString();
Assert.AreEqual("{ 1, 2, 3 }", value);
}
public void TestIsEmpty()
{
DelimitedStringBuilder builder = null;
Assert.IsTrue(builder.IsEmpty(), "Null instance is empty.");
builder = new DelimitedStringBuilder();
Assert.IsTrue(builder.IsEmpty(), "Empty contents is empty.");
builder.AddIfNotEmpty(null);
Assert.IsTrue(builder.IsEmpty(), "Adding null is supported but still empty.");
builder.AddIfNotEmpty("");
Assert.IsTrue(builder.IsEmpty(), "Adding empty to this method is still empty.");
builder.AddIfNotEmpty("something");
Assert.IsTrue(!builder.IsEmpty(), "Finally this is not empty.");
}
public void It_can_be_used_to_create_SQL_statements()
{
var andBuilder = new DelimitedStringBuilder<object>
{
Separator = " AND ",
Prefix = "(",
Suffix = ")",
};
var orBuilder = new DelimitedStringBuilder<string>
{
Separator = " OR ",
Prefix = "(",
Suffix = ")",
};
andBuilder.Append("a = 1").Append("b = 2");
orBuilder.Append("c = 3").Append("d = 4");
andBuilder.Append(orBuilder);
var whereClause = andBuilder.ToString();
Assert.AreEqual("(a = 1) AND (b = 2) AND ((c = 3) OR (d = 4))", whereClause);
}
public void It_uses_ToString_as_the_default_formatter()
{
var builder = new DelimitedStringBuilder<object>();
var value = builder
.Append(new { x = 1 })
.Append(new { x = 2 })
.Append(new { x = 3 })
.ToString();
Assert.AreEqual("{ x = 1 }, { x = 2 }, { x = 3 }", value);
}
public void It_uses_a_comma_as_the_default_separator()
{
var builder = new DelimitedStringBuilder<int>();
var value = builder
.Append(1)
.Append(2)
.Append(3)
.ToString();
Assert.AreEqual("1, 2, 3", value);
}
public void It_skips_null_items()
{
var builder = new DelimitedStringBuilder<string>();
var value = builder
.Append("a")
.Append(null)
.Append("b")
.ToString();
Assert.AreEqual("a, b", value);
}
public void It_skips_nested_builders_that_are_empty()
{
var andBuilder = new DelimitedStringBuilder<object>
{
Separator = " AND ",
Prefix = "(",
Suffix = ")",
};
var orBuilder = new DelimitedStringBuilder<string>
{
Separator = " OR ",
Prefix = "(",
Suffix = ")",
};
andBuilder.Append("a = 1").Append("b = 2");
andBuilder.Append(orBuilder);
var whereClause = andBuilder.ToString();
Assert.AreEqual("(a = 1) AND (b = 2)", whereClause);
}
public void It_skips_items_that_format_as_the_empty_string()
{
var builder = new DelimitedStringBuilder<string>();
var value = builder
.Append("a")
.Append("")
.Append("b")
.ToString();
Assert.AreEqual("a, b", value);
}
public void It_returns_the_empty_string_when_no_items_are_added()
{
var builder = new DelimitedStringBuilder<int>();
var value = builder
.ToString();
Assert.AreEqual("", value);
}
public void It_has_a_ToString_overload_that_uses_the_specified_items()
{
var builder = new DelimitedStringBuilder<int>
{
Separator = "|"
};
var value = builder.ToString(new List<int> { 1, 2, 3 });
Assert.AreEqual("1|2|3", value);
}
public void It_has_a_Clear_method_that_clears_the_builder()
{
var builder = new DelimitedStringBuilder<int>();
var value = builder
.Append(1)
.Append(2)
.Append(3)
.Clear()
.Append(4)
.Append(5)
.Append(6)
.ToString();
Assert.AreEqual("4, 5, 6", value);
}
