public void CachedHashCodeExistsExpr()
{
var x = new BoundVariable(Token.NoToken, new TypedIdent(Token.NoToken, "x", BasicType.Int));
var y = new BoundVariable(Token.NoToken, new TypedIdent(Token.NoToken, "x", BasicType.Int));
var body = Expr.Gt (new IdentifierExpr (Token.NoToken, x, /*immutable=*/true),
new IdentifierExpr(Token.NoToken, y, /*immutable=*/true));
var exists = new ExistsExpr(Token.NoToken, new List<Variable> () {x, y }, body, /*immutable=*/ true);
Assert.AreEqual(exists.ComputeHashCode(), exists.GetHashCode());
}
public void SimpleExists() {
var boundVar = new BoundVariable(Token.NoToken, new TypedIdent(Token.NoToken,"foo",Microsoft.Boogie.Type.Bool));
var id = new IdentifierExpr(Token.NoToken, boundVar);
var exists = new ExistsExpr(Token.NoToken, new List<Variable>() { boundVar }, id);
var id2 = new IdentifierExpr(Token.NoToken, boundVar);
var exists2 = new ExistsExpr(Token.NoToken, new List<Variable>() { boundVar }, id2);
Assert.AreNotSame(exists, exists2); // These are different references
Assert.IsTrue(exists.Equals(exists2)); // These are "structurally equal"
Assert.AreEqual(exists.GetHashCode(), exists2.GetHashCode()); // If the .Equals() is true then hash codes must be the same
}