public void FixedStringBuilder_TryAppend_Rolls_Back_When_Capacity_Is_Reached_With_String_And_Reserve()
{
FixedStringBuilder target = new FixedStringBuilder(4);
Assert.IsTrue(target.TryAppend("XX", 1, 0));
Assert.IsFalse(target.TryAppend("XX", 1, 0));
Assert.AreEqual(string.Empty, target.ToString());
}
public void FixedStringBuilder_TryAppend_Does_Not_Exceed_Capacity_With_Character()
{
FixedStringBuilder target = new FixedStringBuilder(1);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsFalse(target.TryAppend('X', 0));
Assert.AreEqual("X", target.ToString());
}
public void FixedStringBuilder_TryAppend_Does_Not_Exceed_Capacity_With_String_And_Reserve()
{
FixedStringBuilder target = new FixedStringBuilder(4);
Assert.IsTrue(target.TryAppend("XX", 1));
Assert.IsFalse(target.TryAppend("XX", 1));
Assert.AreEqual("XX", target.ToString());
}
public void FixedStringBuilder_TryResize_Can_Always_Expand_Capacity()
{
FixedStringBuilder target = new FixedStringBuilder(1);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsTrue(target.TryResize(2, 0));
Assert.IsTrue(target.TryAppend('X', 0));
Assert.AreEqual("XX", target.ToString());
}
public void FixedStringBuilder_TryAppend_Does_Nothing_With_Null_Strings()
{
FixedStringBuilder target = new FixedStringBuilder(0);
Assert.IsTrue(target.TryAppend(null, 0));
Assert.AreEqual(0, target.Length);
Assert.IsTrue(target.TryAppend(null, 0, 0));
Assert.AreEqual(0, target.Length);
}
public void FixedStringBuilder_Length_Returns_Current_Length()
{
FixedStringBuilder target = new FixedStringBuilder(2);
Assert.AreEqual(0, target.Length);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.AreEqual(1, target.Length);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.AreEqual(2, target.Length);
}
public void FixedStringBuilder_TryResize_Only_Reduces_Capacity_If_There_Is_Room()
{
FixedStringBuilder target = new FixedStringBuilder(3);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsFalse(target.TryResize(1, 0));
Assert.IsTrue(target.TryResize(2, 0));
Assert.AreEqual("XX", target.ToString());
}
public void FixedStringBuilder_TryExpand_Does_Nothing_If_Capacity_Is_Already_Larger()
{
FixedStringBuilder target = new FixedStringBuilder(3);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsFalse(target.TryExpand(2));
Assert.IsTrue(target.TryAppend('X', 0));
Assert.IsTrue(target.TryAppend('X', 0));
Assert.AreEqual("XXX", target.ToString());
}
public void FixedStringBuilder_TryAppend_Keeps_Rollback_When_Capacity_Is_Reached_With_Character_And_Reserve()
{
FixedStringBuilder target = new FixedStringBuilder(2);
Assert.IsTrue(target.TryAppend('X', 1));
int actual = 0;
Assert.IsFalse(target.TryAppend('X', 1, out actual));
Assert.AreEqual(1, actual);
Assert.AreEqual("X", target.ToString());
}
public void FixedStringBuilder_TryAppend_Sets_Rollback_With_Character_And_Reserve()
{
FixedStringBuilder target = new FixedStringBuilder(3);
Assert.IsTrue(target.TryAppend('X', 0));
int actual = 0;
Assert.IsTrue(target.TryAppend('X', 1, out actual));
Assert.IsFalse(target.TryAppend('X', 1, actual));
Assert.AreEqual(1, actual);
Assert.AreEqual("X", target.ToString());
}
public void FixedStringBuilder_Last_Returns_Last_Character()
{
FixedStringBuilder target = new FixedStringBuilder(2);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.AreEqual('X', target.Last);
}
public void FixedStringBuilder_Clear_Resets_Builder()
{
FixedStringBuilder target = new FixedStringBuilder(1);
Assert.IsTrue(target.TryAppend('X', 0));
Assert.AreEqual("X", target.ToString());
target.Clear();
Assert.AreEqual(string.Empty, target.ToString());
}
public void FixedStringBuilder_TryAppend_Rejects_Negative_Reserve()
{
FixedStringBuilder target = new FixedStringBuilder(2);
try
{
target.TryAppend('X', -1);
Assert.Fail();
}
catch (ArgumentOutOfRangeException ex)
{
Assert.AreEqual(typeof(ArgumentOutOfRangeException), ex.GetType());
}
try
{
target.TryAppend("XX", -1);
Assert.Fail();
}
catch (ArgumentOutOfRangeException ex)
{
Assert.AreEqual(typeof(ArgumentOutOfRangeException), ex.GetType());
}
try
{
target.TryAppend('X', -1, 0);
Assert.Fail();
}
catch (ArgumentOutOfRangeException ex)
{
Assert.AreEqual(typeof(ArgumentOutOfRangeException), ex.GetType());
}
try
{
target.TryAppend("XX", -1, 0);
Assert.Fail();
}
catch (ArgumentOutOfRangeException ex)
{
Assert.AreEqual(typeof(ArgumentOutOfRangeException), ex.GetType());
}
}
