Examples with Constraint org.evosuite.symbolic.expr.Constraint used on opensource projects

Example 96 with Constraint

use of org.evosuite.symbolic.expr.Constraint in project evosuite by EvoSuite.

the class TestStringSearch method testStartsWithFalseConstant.

@Test
public void testStartsWithFalseConstant() {
    List<Constraint<?>> constraints = new ArrayList<Constraint<?>>();
    String var1 = "footest";
    String const2 = "test";
    StringVariable strVar = new StringVariable("test1", var1);
    StringConstant strConst = new StringConstant(const2);
    IntegerConstant offs_expr = new IntegerConstant(3);
    ArrayList<Expression<?>> other = new ArrayList<Expression<?>>();
    other.add(offs_expr);
    StringMultipleComparison strComp = new StringMultipleComparison(strVar, Operator.STARTSWITH, strConst, other, 0L);
    constraints.add(new StringConstraint(strComp, Comparator.EQ, new IntegerConstant(0)));
    EvoSuiteSolver skr = new EvoSuiteSolver();
    Map<String, Object> result;
    try {
        result = solve(skr, constraints);
        assertNotNull(result);
        assertNotNull(result.get("test1"));
        assertFalse((result.get("test1").toString()).startsWith(const2, 3));
    } catch (SolverTimeoutException e) {
        fail();
    }
}

Example 97 with Constraint

use of org.evosuite.symbolic.expr.Constraint in project evosuite by EvoSuite.

the class TestStringSearch method testEndsWithFalseConstant.

@Test
public void testEndsWithFalseConstant() {
    List<Constraint<?>> constraints = new ArrayList<Constraint<?>>();
    String var1 = "footest";
    String const2 = "test";
    StringVariable strVar = new StringVariable("test1", var1);
    StringConstant strConst = new StringConstant(const2);
    StringBinaryComparison strComp = new StringBinaryComparison(strVar, Operator.ENDSWITH, strConst, 0L);
    constraints.add(new StringConstraint(strComp, Comparator.EQ, new IntegerConstant(0)));
    EvoSuiteSolver skr = new EvoSuiteSolver();
    Map<String, Object> result;
    try {
        result = solve(skr, constraints);
        assertNotNull(result);
        assertNotNull(result.get("test1"));
        assertFalse((result.get("test1").toString()).endsWith(const2));
    } catch (SolverTimeoutException e) {
        fail();
    }
}

Example 98 with Constraint

use of org.evosuite.symbolic.expr.Constraint in project evosuite by EvoSuite.

the class TestStringSearch method testIndexOfC2.

@Test
public void testIndexOfC2() {
    String var1value = ":cc]#0l";
    StringVariable var1 = new StringVariable("var0", var1value);
    IntegerConstant colon_code = new IntegerConstant(58);
    IntegerConstant numeral_code = new IntegerConstant(35);
    IntegerConstant minus_one = new IntegerConstant(-1);
    StringBinaryToIntegerExpression index_of_colon = new StringBinaryToIntegerExpression(var1, Operator.INDEXOFC, colon_code, -1L);
    StringBinaryToIntegerExpression index_of_numeral = new StringBinaryToIntegerExpression(var1, Operator.INDEXOFC, numeral_code, -1L);
    /*
		 * Here we are trying to modify the string such that the first '#' comes
		 * before the first ':', and both are present
		 */
    IntegerConstraint constr1 = new IntegerConstraint(index_of_colon, Comparator.NE, minus_one);
    IntegerConstraint constr2 = new IntegerConstraint(index_of_numeral, Comparator.NE, minus_one);
    IntegerConstraint constr3 = new IntegerConstraint(index_of_numeral, Comparator.LT, index_of_colon);
    List<Constraint<?>> constraints = new ArrayList<Constraint<?>>();
    constraints.add(constr1);
    constraints.add(constr2);
    constraints.add(constr3);
    EvoSuiteSolver solver = new EvoSuiteSolver();
    Map<String, Object> solution = null;
    try {
        /*
			 * The constraint is not trivial, as there are search plateaus. So
			 * it is ok if sometimes it fails (tried 10 times, failed 3).
			 */
        final int TRIES = 20;
        for (int i = 0; i < TRIES; i++) {
            solution = solve(solver, constraints);
            if (solution != null) {
                break;
            }
        }
        assertNotNull(solution);
        String result = solution.get("var0").toString();
        int colonPos = result.indexOf(':');
        int numeralPos = result.indexOf('#');
        assertTrue("Colon not found in " + result, colonPos >= 0);
        assertTrue("Numeral not found in " + result, numeralPos >= 0);
        assertTrue(colonPos > numeralPos);
    } catch (SolverTimeoutException e) {
        fail();
    }
}

Example 99 with Constraint

use of org.evosuite.symbolic.expr.Constraint in project evosuite by EvoSuite.

the class ConstraintNormalizer method normalizeIntegerConstriant.

private static Constraint<?> normalizeIntegerConstriant(IntegerConstraint c) {
    if (c.getLeftOperand() instanceof IntegerComparison) {
        IntegerComparison cmp = (IntegerComparison) c.getLeftOperand();
        int value = ((Number) c.getRightOperand().getConcreteValue()).intValue();
        Comparator op = c.getComparator();
        Expression<Long> cmp_left = cmp.getLeftOperant();
        Expression<Long> cmp_right = cmp.getRightOperant();
        return createIntegerConstraint(cmp_left, op, cmp_right, value);
    } else {
        assert (c.getRightOperand() instanceof IntegerComparison);
        IntegerComparison cmp = (IntegerComparison) c.getRightOperand();
        int value = ((Number) c.getLeftOperand().getConcreteValue()).intValue();
        Comparator op = c.getComparator();
        Expression<Long> cmp_left = cmp.getLeftOperant();
        Expression<Long> cmp_right = cmp.getRightOperant();
        Comparator swap_op = op.swap();
        int swap_value = -value;
        return createIntegerConstraint(cmp_left, swap_op, cmp_right, swap_value);
    }
}

Example 100 with Constraint

use of org.evosuite.symbolic.expr.Constraint in project evosuite by EvoSuite.

the class EvoSuiteSolver method solve.

@Override
public SolverResult solve(Collection<Constraint<?>> constraints) throws SolverTimeoutException, SolverEmptyQueryException {
    long timeout = Properties.DSE_CONSTRAINT_SOLVER_TIMEOUT_MILLIS;
    long startTimeMillis = System.currentTimeMillis();
    Set<Variable<?>> variables = getVariables(constraints);
    Map<String, Object> initialValues = getConcreteValues(variables);
    double distance = DistanceEstimator.getDistance(constraints);
    if (distance == 0.0) {
        log.info("Initial distance already is 0.0, skipping search");
        SolverResult satResult = SolverResult.newSAT(initialValues);
        return satResult;
    }
    for (int attempt = 0; attempt <= Properties.DSE_VARIABLE_RESETS; attempt++) {
        for (Variable<?> v : variables) {
            long currentTimeMillis = System.currentTimeMillis();
            long elapsed_solving_time = currentTimeMillis - startTimeMillis;
            if (elapsed_solving_time > timeout) {
                throw new SolverTimeoutException();
            }
            log.debug("Variable: " + v + ", " + variables);
            if (v instanceof IntegerVariable) {
                IntegerVariable integerVariable = (IntegerVariable) v;
                IntegerAVM avm = new IntegerAVM(integerVariable, constraints, startTimeMillis, timeout);
                avm.applyAVM();
            } else if (v instanceof RealVariable) {
                RealVariable realVariable = (RealVariable) v;
                RealAVM avm = new RealAVM(realVariable, constraints, startTimeMillis, timeout);
                avm.applyAVM();
            } else if (v instanceof StringVariable) {
                StringVariable strVariable = (StringVariable) v;
                StringAVM avm = new StringAVM(strVariable, constraints, startTimeMillis, timeout);
                avm.applyAVM();
            } else {
                throw new RuntimeException("Unknown variable type " + v.getClass().getName());
            }
            distance = DistanceEstimator.getDistance(constraints);
            if (distance <= 0.0) {
                log.info("Distance is 0, ending search");
                break;
            }
        }
        if (distance <= 0.0) {
            log.info("Distance is 0, ending search");
            break;
        } else {
            log.info("Randomizing variables");
            randomizeValues(variables, getConstants(constraints));
        }
    }
    // distance = DistanceEstimator.getDistance(constraints);
    if (distance <= 0) {
        log.debug("Distance is " + distance + ", found solution");
        Map<String, Object> new_model = getConcreteValues(variables);
        setConcreteValues(variables, initialValues);
        SolverResult satResult = SolverResult.newSAT(new_model);
        return satResult;
    } else {
        setConcreteValues(variables, initialValues);
        log.debug("Returning null, search was not successful");
        SolverResult unsatResult = SolverResult.newUNSAT();
        return unsatResult;
    }
}