KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use getSubPathCost method of org.evomaster.client.java.instrumentation.coverage.methodreplacement.regex.CostMatrix class

Best EvoMaster code snippet using org.evomaster.client.java.instrumentation.coverage.methodreplacement.regex.CostMatrix.getSubPathCost

Source:CostMatrix.java

...26                if (col == otherCol) {27                    continue;28                }29                double otherCost = matrix[FIRST_ROW][otherCol];30                min = Math.min(min, getSubPathCost(otherCost, Math.ceil(t.cost)));31            }32            matrix[FIRST_ROW][col] = min;33        }34        //then look at the other rows35        for (int i = 1; i < ROWS; i++) {36            for (int col = 0; col < COLUMNS; col++) {37                matrix[i][col] = Double.MAX_VALUE;38                for (GraphTransition t : graph.getIncomingTransitions(i, col)) {39                    int otherCol = graph.getColumn(t.fromState);40                    int otherRow = t.fromRow;41                    if (!t.type.equals(GraphTransition.TransitionType.PHANTOM)) {42                        matrix[i][col] = Math.min(matrix[i][col], getSubPathCost(matrix[otherRow][otherCol], Math.ceil(t.cost)));43                    } else {44                        /*45                         * artificial transition to final/sink state, so just take same values as previous state46                         */47                        matrix[i][col] = Math.min(matrix[i][col], matrix[otherRow][otherCol]);48                    }49                }50            }51        }52        double min = matrix[ROWS - 1][COLUMNS - 1];53        return (int) Math.round(min);54    }55    /**56     * Note: this is different from normal matching algorithms, as we enforce an order57     * among the operators: delete, replace and then insert.58     * @param graph59     * @return60     */61    public static double calculateCostForStringAVM(RegexGraph graph) {62        final int ROWS = graph.getNumberOfRows();63        final int COLUMNS = graph.getNumberOfColumns();64        /*65         * we create a matrix based on each row and each column in the graph.66         * Each cell has 3 values, each representing the cost of thre different types of path:67         *68         * 0) only deletion69         * 1) deletions followed by replacement70         * 2) as above, and then followed by insertions71         */72        final double[][][] matrix = new double[ROWS][COLUMNS][3];73        calculateInsertionCostOnFirstRow(graph, matrix);74        for (int i = 1; i < ROWS; i++) {75            for (int col = 0; col < COLUMNS; col++) {76                /*77                 * unless a path is explicitly updated, it will have maximum distance by default78                 */79                matrix[i][col][DEL] = Double.MAX_VALUE;80                matrix[i][col][REP] = Double.MAX_VALUE;81                matrix[i][col][INS] = Double.MAX_VALUE;82                for (GraphTransition t : graph.getIncomingTransitions(i, col)) {83                    int otherCol = graph.getColumn(t.fromState);84                    int otherRow = t.fromRow;85                    if (t.type.equals(GraphTransition.TransitionType.INSERTION)) {86                        assert otherRow == i;87                        /*88                         * if we have an insertion, only the insertion path can be continued.89                         * that's the reason why on the left side we only update for [INS].90                         * An insertion can continue any type of path (and so all types are present on the right side).91                         */92                        matrix[i][col][INS] = Math.min(matrix[i][col][INS], getSubPathCost(matrix[otherRow][otherCol][DEL], t.cost));93                        matrix[i][col][INS] = Math.min(matrix[i][col][INS], getSubPathCost(matrix[otherRow][otherCol][REP], t.cost));94                        matrix[i][col][INS] = Math.min(matrix[i][col][INS], getSubPathCost(matrix[otherRow][otherCol][INS], t.cost));95                    } else if (t.type.equals(GraphTransition.TransitionType.REPLACEMENT)) {96                        /*97                         * if we have a replacement, then we cannot continue a delete path.98                         * So, no [DEL] on the left side.99                         * A replacement can continue a delete or replace path, but not an insertion one (and so [DEL] and100                         * [REP] on right side)101                         */102                        matrix[i][col][REP] = Math.min(matrix[i][col][REP], getSubPathCost(matrix[otherRow][otherCol][DEL], t.cost));103                        matrix[i][col][REP] = Math.min(matrix[i][col][REP], getSubPathCost(matrix[otherRow][otherCol][REP], t.cost));104                        /*105                         * from this state on, an insertion path can be followed, with same cost (ie right side) as replacement path106                         */107                        matrix[i][col][INS] = Math.min(matrix[i][col][INS], getSubPathCost(matrix[otherRow][otherCol][DEL], t.cost));108                        matrix[i][col][INS] = Math.min(matrix[i][col][INS], getSubPathCost(matrix[otherRow][otherCol][REP], t.cost));109                    } else if (t.type.equals(GraphTransition.TransitionType.DELETION)) {110                        /*111                         * deletion can only follow a deletion path (so only [DEL] or right side).112                         * but, from this state on, any new path can be followed (so all on left side)113                         */114                        matrix[i][col][DEL] = Math.min(matrix[i][col][DEL], getSubPathCost(matrix[otherRow][otherCol][DEL], t.cost));115                        matrix[i][col][REP] = Math.min(matrix[i][col][REP], getSubPathCost(matrix[otherRow][otherCol][DEL], t.cost));116                        matrix[i][col][INS] = Math.min(matrix[i][col][INS], getSubPathCost(matrix[otherRow][otherCol][DEL], t.cost));117                    } else if (t.type.equals(GraphTransition.TransitionType.PHANTOM)) {118                        assert t.cost == 0;119                        /*120                         * artificial transition to final/sink state, so just take same values as previous state121                         */122                        matrix[i][col][DEL] = Math.min(matrix[i][col][DEL], matrix[otherRow][otherCol][DEL]);123                        matrix[i][col][REP] = Math.min(matrix[i][col][REP], matrix[otherRow][otherCol][REP]);124                        matrix[i][col][INS] = Math.min(matrix[i][col][INS], matrix[otherRow][otherCol][INS]);125                    }126                }127            }128            /*129             * TODO: The algorithm of Myers's paper, at page 12, makes a distinction between D and E transitions.130             * Insertions of type E are done last. Not fully clear if it has an effect here: ie, recall that131             * here we do minimization (calculate distance) and not maximization (similarity)132             */133        }134        /*135         * get the minimum among the 3 different paths in the sink state136         */137        double min = Double.MAX_VALUE;138        for (double value : matrix[ROWS - 1][COLUMNS - 1]) {139            if (value < min) {140                min = value;141            }142        }143        return min;144    }145    /**146     * We cannot just do previousStateCost + transitionCost, as there might be computational overflows147     *148     * @param previousStateCost149     * @param transitionCost150     * @return151     * @throws IllegalArgumentException152     */153    private static double getSubPathCost(double previousStateCost, double transitionCost) throws IllegalArgumentException {154        if (previousStateCost < 0) {155            throw new IllegalArgumentException("previousStateCost cannot be negative: " + previousStateCost);156        }157        if (transitionCost < 0) {158            throw new IllegalArgumentException("transitionCost cannot be negative: " + transitionCost);159        }160        if (previousStateCost == Double.MAX_VALUE || transitionCost == Double.MAX_VALUE) {161            return Double.MAX_VALUE;162        }163        double sum = previousStateCost + transitionCost;164        if (sum < previousStateCost || sum < transitionCost) {165            /*166             * likely overflow167             */168            return Double.MAX_VALUE;169        }170        return sum;171    }172    /**173     * First row is special, ie very different from the others174     *175     * @param graph176     * @param matrix177     */178    private static void calculateInsertionCostOnFirstRow(RegexGraph graph, final double[][][] matrix) {179        // First row is cost of matching empty sequence on regex180        final int FIRST_ROW = 0;181        /*182         * init first starting state with 0 costs183         */184        matrix[FIRST_ROW][0][0] = 0;185        matrix[FIRST_ROW][0][1] = 0;186        matrix[FIRST_ROW][0][2] = 0;187        for (int col = 1; col < graph.getNumberOfColumns(); col++) {188            double min = Double.MAX_VALUE;189            for (GraphTransition t : graph.getIncomingTransitions(FIRST_ROW, col)) {190                /*191                 * on first row, there can be only insertions coming from the same row,192                 * apart from last node that can have a phantom transition to sink state193                 */194                assert t.type.equals(GraphTransition.TransitionType.INSERTION) ||195                        t.type.equals(GraphTransition.TransitionType.PHANTOM);196                assert t.fromRow == 0;197                int otherCol = graph.getColumn(t.fromState);198                //self transition199                if (col == otherCol) {200                    continue;201                }202                double otherCost = matrix[FIRST_ROW][otherCol][2];203                min = Math.min(min, getSubPathCost(otherCost, t.cost));204            }205            /*206             * as there can be only insertions, the delete and replace paths cannot be followed, and207             * so maximum distance208             */209            matrix[FIRST_ROW][col][0] = Double.MAX_VALUE;210            matrix[FIRST_ROW][col][1] = Double.MAX_VALUE;211            matrix[FIRST_ROW][col][2] = min;212        }213    }214}...

getSubPathCost

Using AI Code Generation

1package org.evomaster.client.java.instrumentation.coverage.methodreplacement.regex;2import org.evomaster.client.java.instrumentation.coverage.methodreplacement.DistanceHelper;3import org.evomaster.client.java.instrumentation.coverage.methodreplacement.DistanceHelperKt;4import org.evomaster.client.java.instrumentation.shared.Replacement;5import java.util.Arrays;6import java.util.List;7public class CostMatrixReplacement implements Replacement {8    public List<String> getTargetClassNames() {9        return Arrays.asList("org.evomaster.client.java.instrumentation.coverage.methodreplacement.regex.CostMatrix");10    }11    public String getTargetMethodDescription() {12        return "int getSubPathCost(int, int, int, int)";13    }14    public Object replaceCall(String className, String methodName, Object[] parameters) {15        int row = (int) parameters[0];16        int col = (int) parameters[1];17        int rowSize = (int) parameters[2];18        int colSize = (int) parameters[3];19        if (row < 0 || col < 0 || row >= rowSize || col >= colSize) {20            throw new IllegalArgumentException("Invalid row or column");21        }22        int cost = DistanceHelperKt.getCostMatrix()[row][col];23        return cost;24    }25}26package org.evomaster.client.java.instrumentation.coverage.methodreplacement.regex;27import org.evomaster.client.java.instrumentation.coverage.methodreplacement.DistanceHelper;28import org.evomaster.client.java.instrumentation.coverage.methodreplacement.DistanceHelperKt;29import org.evomaster.client.java.instrumentation.shared.Replacement;30import java.util.Arrays;31import java.util.List;32public class CostMatrixReplacement implements Replacement {33    public List<String> getTargetClassNames() {34        return Arrays.asList("org.evomaster.client.java.instrumentation.coverage.methodreplacement.regex.CostMatrix");35    }36    public String getTargetMethodDescription() {37        return "int getSubPathCost(int, int, int, int)";38    }39    public Object replaceCall(String className, String methodName, Object[] parameters) {40        int row = (int) parameters[0];41        int col = (int) parameters[1];

getSubPathCost

Using AI Code Generation

1import org.evomaster.client.java.instrumentation.coverage.methodreplacement.regex.CostMatrix;2import org.evomaster.client.java.instrumentation.coverage.methodreplacement.regex.RegexCoverageInfo;3import org.evomaster.client.java.instrumentation.coverage.methodreplacement.regex.RegexHandler;4import org.evomaster.client.java.instrumentation.coverage.methodreplacement.regex.RegexSpecialization;5public class ExampleRegex {6    public static void main(String[] args) {7        String regex = "a{2,3}b{2,3}";8        String input = "aaabbb";9        String input2 = "aaabbbb";10        RegexSpecialization specialization = new RegexSpecialization(regex);11        RegexHandler handler = new RegexHandler(specialization);12        RegexCoverageInfo regexCoverageInfo = new RegexCoverageInfo();13        CostMatrix costMatrix = new CostMatrix();14        int cost = costMatrix.getSubPathCost(input, handler, regexCoverageInfo);15        int cost2 = costMatrix.getSubPathCost(input2, handler, regexCoverageInfo);16        System.out.println("Cost: " + cost);17        System.out.println("Cost2: " + cost2);18    }19}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.