private static void AssertHasExpression(string content, bool expectExpression, int index = -1, PythonLanguageVersion version = PythonLanguageVersion.V35)
{
var buffer = new MockTextBuffer(content);
if (index < 0)
{
index += content.Length + 1;
}
var pt = new SnapshotPoint(buffer.CurrentSnapshot, index);
var actual = PythonTextBufferInfo.IsPossibleExpressionAtPoint(pt, version);
if (expectExpression)
{
Assert.IsTrue(actual, content);
}
else
{
Assert.IsFalse(actual, content);
}
}