Я пытаюсь протестировать метод public void set(char letter, int value) в моем классе ArrayIntList.
public class LetterInventory {
private int[] count; //list of letters a to z
private int size;
public static final int MAX = 26;
public LetterInventory(String data) {
count = new int[MAX];
data = data.toLowerCase();
size = 0;
for (int i = 0; i < data.length(); i++) {
if (Character.isLetter(data.charAt(i))) {
count[data.charAt(i) - 'a']++;
size++;
}
}
}
public int size() {
return size;
}
public boolean isEmpty() {
return size == 0;
}
public int get(char letter) {
if(!Character.isLetter(letter)) {
throw new IllegalArgumentException("nonalphabetic character: " + letter);
}
return count[Character.toLowerCase(letter) - 'a'];
}
public String toString() {
String represent = "[";
for (int i = 0; i < MAX; i++) {
for (int j = 0; j < count[i]; j++) {
represent += (char) ('a' + i);
}
}
represent += "]";
return represent;
}
public void set(char letter, int value) {
if (!Character.isLetter(letter) || value < 0) {
throw new IllegalArgumentException("nonalphabetic character: " + letter,
"negative value " + value);
}
letter = Character.toLowerCase(letter);
size += value - count[letter - 'a'];
count[letter - 'a'] = value;
}
/*
public LetterInventory add(LetterInventory other) {
LetterInventory total = new LetterInventory();
}
*/
}
В этом классе метод set устанавливает счет для данной буквы в заданное значение.
При попытке проверить его из моего основного класса:
// This program tests stage 2 of the LetterInventory class. The program reads
// from the file test2.txt which has a series of test cases with the correct
// answers.
import java.util.*;
import java.io.*;
public class Test2 {
public static void main(String[] args) {
Scanner input = null;
try {
input = new Scanner(new File("test2.txt"));
} catch (FileNotFoundException e) {
System.out.println("You must copy test2.txt to this directory" +
" before running the testing program.");
System.exit(1);
}
LetterInventory tester = new LetterInventory("");
System.out.println("Starting with empty inventory");
check(tester, input);
while (input.hasNext()) {
char ch = input.next().charAt(0);
int count = input.nextInt();
System.out.println("setting count for " + ch + " to " + count);
try {
tester.set(ch, count);
} catch(Exception e) {
System.out.println("failed");
System.out.println(" threw exception: " + e);
int line = e.getStackTrace()[0].getLineNumber();
System.out.println(" in LetterInventory line#" + line);
System.exit(1);
}
check(tester, input);
}
System.out.println("All tests passed.");
}
// pre : input file contains a 2-line test case that contains the state
// that the given inventory should be in after performing the given
// call on get
// post: reports whether or not test was passed
public static void check(LetterInventory tester, Scanner input) {
testSize(tester, input);
testToString(tester, input);
testIsEmpty(tester, input);
testGet(tester, input);
System.out.println("size, toString, isEmpty, and count all passed");
System.out.println();
}
// pre : input file contains correct toString
// post: reports whether or not test was passed
public static void testToString(LetterInventory tester, Scanner input) {
String correct = input.next();
System.out.println("inventory = " + correct);
String test = "";
try {
test = tester.toString();
} catch (Exception e) {
System.out.println("toString failed");
System.out.println(" threw exception: " + e);
int line = e.getStackTrace()[0].getLineNumber();
System.out.println(" in LetterInventory line#" + line);
System.exit(1);
}
if (!correct.equals(test)) {
System.out.println("toString failed");
System.out.println(" correct toString = " + correct);
System.out.println(" your toString = " + test);
System.exit(1);
}
}
// pre : input file contains correct size
// post: reports whether or not test was passed
public static void testSize(LetterInventory tester, Scanner input) {
int correct = input.nextInt();
int test = 0;
try {
test = tester.size();
} catch (Exception e) {
System.out.println("size failed");
System.out.println(" threw exception: " + e);
int line = e.getStackTrace()[0].getLineNumber();
System.out.println(" in LetterInventory line#" + line);
System.exit(1);
}
if (correct != test) {
System.out.println("size failed");
System.out.println(" correct size = " + correct);
System.out.println(" your size = " + test);
System.exit(1);
}
}
// pre : input file contains correct isEmpty
// post: reports whether or not test was passed
public static void testIsEmpty(LetterInventory tester, Scanner input) {
boolean correct = input.nextBoolean();
boolean test = false;
try {
test = tester.isEmpty();
} catch (Exception e) {
System.out.println("isEmpty failed");
System.out.println(" threw exception: " + e);
int line = e.getStackTrace()[0].getLineNumber();
System.out.println(" in LetterInventory line#" + line);
System.exit(1);
}
if (correct != test) {
System.out.println("isEmpty failed");
System.out.println(" correct isEmpty = " + correct);
System.out.println(" your isEmpty = " + test);
System.exit(1);
}
}
// pre : input file contains correct get values (26 of them)
// post: reports whether or not test was passed
public static void testGet(LetterInventory tester, Scanner input) {
for (char ch = 'a'; ch <= 'z'; ch++) {
int correct = input.nextInt();
int test = 0;
try {
test = tester.get(ch);
} catch (Exception e) {
System.out.println("get failed for '" + ch + "'");
System.out.println(" threw exception: " + e);
int line = e.getStackTrace()[0].getLineNumber();
System.out.println(" in LetterInventory line#" + line);
System.exit(1);
}
if (correct != test) {
System.out.println("get failed for '" + ch + "'");
System.out.println(" correct get = " + correct);
System.out.println(" your get = " + test);
System.exit(1);
}
}
}
}
я получаю следующую ошибку:
Starting with empty inventory
inventory = []
size, toString, isEmpty, and count all passed
setting count for g to 3
Exception in thread "main" java.lang.NoSuchMethodError: LetterInventory.set(CI)V
test2.txt файл для справки:
0 [] true 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
g 3
3 [ggg] false 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
a 2
5 [aaggg] false 2 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
h 4
9 [aaggghhhh] false 2 0 0 0 0 0 3 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
m 1
10 [aaggghhhhm] false 2 0 0 0 0 0 3 4 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
g 0
7 [aahhhhm] false 2 0 0 0 0 0 0 4 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
b 2
9 [aabbhhhhm] false 2 2 0 0 0 0 0 4 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
z 1
10 [aabbhhhhmz] false 2 2 0 0 0 0 0 4 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1
p 4
14 [aabbhhhhmppppz] false 2 2 0 0 0 0 0 4 0 0 0 0 1 0 0 4 0 0 0 0 0 0 0 0 0 1
z 0
13 [aabbhhhhmpppp] false 2 2 0 0 0 0 0 4 0 0 0 0 1 0 0 4 0 0 0 0 0 0 0 0 0 0
b 0
11 [aahhhhmpppp] false 2 0 0 0 0 0 0 4 0 0 0 0 1 0 0 4 0 0 0 0 0 0 0 0 0 0
a 0
9 [hhhhmpppp] false 0 0 0 0 0 0 0 4 0 0 0 0 1 0 0 4 0 0 0 0 0 0 0 0 0 0
h 0
5 [mpppp] false 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 4 0 0 0 0 0 0 0 0 0 0
p 0
1 [m] false 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
m 0
0 [] true 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
G 3
3 [ggg] false 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
A 2
5 [aaggg] false 2 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
H 4
9 [aaggghhhh] false 2 0 0 0 0 0 3 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
M 1
10 [aaggghhhhm] false 2 0 0 0 0 0 3 4 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0