Examples with StringVariable org.evosuite.symbolic.expr.str.StringVariable used on opensource projects

Example 16 with StringVariable

use of org.evosuite.symbolic.expr.str.StringVariable 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 17 with StringVariable

use of org.evosuite.symbolic.expr.str.StringVariable 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 18 with StringVariable

use of org.evosuite.symbolic.expr.str.StringVariable 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 19 with StringVariable

use of org.evosuite.symbolic.expr.str.StringVariable in project evosuite by EvoSuite.

the class Z3Solver method buildSmtQuery.

private static SmtCheckSatQuery buildSmtQuery(Collection<Constraint<?>> constraints, Set<Variable<?>> variables) {
    List<SmtConstantDeclaration> constantDeclarations = new LinkedList<SmtConstantDeclaration>();
    for (Variable<?> v : variables) {
        String varName = v.getName();
        if (v instanceof IntegerVariable) {
            SmtConstantDeclaration intVar = SmtExprBuilder.mkIntConstantDeclaration(varName);
            constantDeclarations.add(intVar);
        } else if (v instanceof RealVariable) {
            SmtConstantDeclaration realVar = SmtExprBuilder.mkRealConstantDeclaration(varName);
            constantDeclarations.add(realVar);
        } else if (v instanceof StringVariable) {
        // ignore string variables
        } else {
            throw new RuntimeException("Unknown variable type " + v.getClass().getCanonicalName());
        }
    }
    List<SmtAssertion> assertions = new LinkedList<SmtAssertion>();
    for (Constraint<?> c : constraints) {
        ConstraintToZ3Visitor v = new ConstraintToZ3Visitor();
        SmtExpr bool_expr = c.accept(v, null);
        if (bool_expr != null && bool_expr.isSymbolic()) {
            SmtAssertion newAssertion = new SmtAssertion(bool_expr);
            assertions.add(newAssertion);
        }
    }
    SmtCheckSatQuery smtCheckSatQuery = new SmtCheckSatQuery(constantDeclarations, assertions);
    return smtCheckSatQuery;
}

Example 20 with StringVariable

use of org.evosuite.symbolic.expr.str.StringVariable 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;
    }
}