public void CreateInstance_TokensEmpty_IsAtEnd()
{
// Arrange
// Act
var target = new FragmentTokenSource(new FragmentToken[0]);
// Assert
Assert.IsTrue(target.IsEnd);
}
public void CreateInstance_TokensNotEmpty_IsNotAtEnd()
{
// Arrange
// Act
var target = new FragmentTokenSource(new[] { FragmentTokenSourceTests.CreateFragmentToken("E") });
// Assert
Assert.IsFalse(target.IsEnd);
}
public void CreateInstance_TokensNotEmpty_TokenThrows()
{
// Arrange
var tokens = new[] { FragmentTokenSourceTests.CreateFragmentToken("A"), FragmentTokenSourceTests.CreateFragmentToken("B") };
var target = new FragmentTokenSource(tokens);
// Act
var t = target.Token;
// Assert
}
public void MoveNext_FirstCall_IsEndIsFalse()
{
// Arrange
var tokens = new[] { FragmentTokenSourceTests.CreateFragmentToken("A"), FragmentTokenSourceTests.CreateFragmentToken("B") };
var target = new FragmentTokenSource(tokens);
// Act
target.MoveNext();
// Assert
Assert.IsFalse(target.IsEnd);
}
public void MoveNext_FirstCall_TokenIsFirstToken()
{
// Arrange
var tokens = new[] { FragmentTokenSourceTests.CreateFragmentToken("A"), FragmentTokenSourceTests.CreateFragmentToken("B") };
var target = new FragmentTokenSource(tokens);
// Act
target.MoveNext();
// Assert
Assert.AreEqual(tokens[0], target.Token);
}
public void CreateInstance_LookAhead_ContainsAllTokens()
{
// Arrange
var tokens = new[] { FragmentTokenSourceTests.CreateFragmentToken("A"), FragmentTokenSourceTests.CreateFragmentToken("B") };
var target = new FragmentTokenSource(tokens);
// Act
var lookAhead = target.LookAhead.ToArray();
// Assert
Assert.IsTrue(tokens.SequenceEqual(lookAhead));
}
public void MoveNext_FirstCall_LookAheadSkipsFirstToken()
{
// Arrange
var tokens = new[] { FragmentTokenSourceTests.CreateFragmentToken("A"), FragmentTokenSourceTests.CreateFragmentToken("B") };
var target = new FragmentTokenSource(tokens);
// Act
target.MoveNext();
var lookAhead = target.LookAhead.ToArray();
// Assert
Assert.IsTrue(tokens.Skip(1).SequenceEqual(lookAhead));
}
public void FragmentTokenSource_IntegrationTest_BehavesAsExpected()
{
// Arrange
var tokens = new[]
{
FragmentTokenSourceTests.CreateFragmentToken("A"),
FragmentTokenSourceTests.CreateFragmentToken("B"),
FragmentTokenSourceTests.CreateFragmentToken("C"),
FragmentTokenSourceTests.CreateFragmentToken("D")
};
var target = new FragmentTokenSource(tokens);
// Integration
Assert.IsFalse(target.IsEnd);
Assert.AreEqual(tokens.Length, target.LookAhead.Count());
Assert.IsTrue(target.MoveNext());
Assert.IsFalse(target.IsEnd);
Assert.AreEqual(tokens[0], target.Token);
Assert.AreEqual(tokens.Length - 1, target.LookAhead.Count());
Assert.IsTrue(target.MoveNext());
Assert.IsFalse(target.IsEnd);
Assert.AreEqual(tokens[1], target.Token);
Assert.AreEqual(tokens.Length - 2, target.LookAhead.Count());
Assert.IsTrue(target.MoveNext());
Assert.IsFalse(target.IsEnd);
Assert.AreEqual(tokens[2], target.Token);
Assert.AreEqual(tokens.Length - 3, target.LookAhead.Count());
Assert.IsTrue(target.MoveNext());
Assert.IsFalse(target.IsEnd);
Assert.AreEqual(tokens[3], target.Token);
Assert.AreEqual(tokens.Length - 4, target.LookAhead.Count());
Assert.IsFalse(target.MoveNext());
Assert.IsTrue(target.IsEnd);
}