I need help for this java programming, struggling. Thank you

I posted requirements and instruction, please help me with detailed explanation.

I posted the code and junit tests, pls do the junit tests (I cannot pass it)

public class TestAnalytics {

// ALREADY IMPLEMENTED; DO NOT MODIFY

private final static int NUMOFQUESTIONs = 50;

private final static int MARKFORQUESTION = 2;

private final static int NUMOFQUESTIONCHOICES = 4;

private final static String TESTCORRECTANSWER = "D,C,A,D,A,B,C,D,B,C,A,B,D,C,A,A,"

+ "A,C,A,B,B,D,B,D,A,B,B,A,C,B,C,A,C,B,B,C,C,C," + "A,B,A,B,B,C,A,B,A,A,D,C";

// TODO: Your implementation starts here

// TODO: Your implementation starts here

/* Your implementation starts here

* Recall that :

* 1. No System.out.println statements should appear here.

* Instead, you need to return the result.

* 2. No Scanner operations should appear here (e.g., input.nextInt()).

* Instead, refer to the input parameters of this method.

*/

}

import static org.junit.Assert.*;

import org.junit.Test; import java.lang.reflect.Field; import java.lang.reflect.Modifier;

import org.junit.rules.Timeout; import org.junit.runners.MethodSorters; import org.junit.FixMethodOrder; import org.junit.Rule; import j..>@FixMethodOrder(MethodSorters.NAME_ASCENDING)

//ALREADY IMPLEMENTED; DO NOT MODIFY //NO NEED TO SUBMIT THIS FILE

/* * Tests included in this class serve as documentation on how instances of a * Test Analytics work. * * Be sure to also read the Lab instructions PDF carefully * * Programming IDEs such as Eclipse are able to fix such compilation errors for * you. However, you are advised to follow the guidance as specified in the * written Lab instructions PDF to fix these compilation errors manually, * because: 1) it helps you better understand how the intended classes and * methods work together; and 2) you may be tested in a written test or exam * without the assistance of IDEs. * */

public class JunitTest_TestAnalyticsTest { @Rule public Timeout globalTimeout = Timeout.seconds(1);

// test the number of static attributes @Test public void test_0_0_staticFields() { try { List fields = Arrays.asList(TestAnalytics.class.getDeclaredFields());

int nStatic = 0; for (Field f : fields) { int mod = f.getModifiers(); if (Modifier.isStatic(mod)) {

nStatic++; } } assertTrue("there should be four static fields", nStatic == 4); } catch (Exception x) { fail("exception occurred trying to get the fields of this class"); } }

@Test public void test_1_0() { //The test system generates this string as a result of student's attempt String stdtest = "James,789654,A,C,B,A,C,B,B,A,D,B,D,A,D,B,C,B,D,B," + "B,A,D,A,C,B,A,A,C,A,A,D,D,C,C,D,C,A,D,A,D,C,A,C,A,D,D,C,C,B,B,D";

// construct the TestAnalytics object TestAnalytics t1 = new TestAnalytics(stdtest); String expectedstdName = "James";

String errorMsg = String.format( " Test arg constructor failed. Returned stduent name (%s) " + "but correct name is (%s)", t1.getStudentName(), expectedstdName); assertTrue(errorMsg, t1.getStudentName().equals(expectedstdName));

}

@Test public void test_1_2() { String stdtest = "James,789654,A,C,B,A,C,B,B,A,D,B,D,A,D,B,C,B,D,B," + "B,A,D,A,C,B,A,A,C,A,A,D,D,C,C,D,C,A,D,A,D,C,A,C,A,D,D,C,C,B,B,D";

TestAnalytics t1 = new TestAnalytics(stdtest);

String expectedstdID = "789654";

String errorMsg = String.format( " Test arg constructor failed. Returned stduent ID (%s) " + "but correct ID is (%s)", t1.getStudentID(), expectedstdID); assertTrue(errorMsg, t1.getStudentID().equals(expectedstdID));

}

@Test public void test_1_3() { String stdtest = "James,789654,A,C,B,A,C,B,B,A,D,B,D,A,D,B,C,B,D,B," + "B,A,D,A,C,B,A,A,C,A,A,D,D,C,C,D,C,A,D,A,D,C,A,C,A,D,D,C,C,B,B,D";

TestAnalytics t1 = new TestAnalytics(stdtest); // make sure you extracted the student answers correctly

String expectedstdAns = "A,C,B,A,C,B,B,A,D,B,D,A,D,B,C,B,D,B,B,A,D,A,C,B," + "A,A,C,A,A,D,D,C,C,D,C,A,D,A,D,C,A,C,A,D,D,C,C,B,B,D";

String errorMsg = String.format( " Test arg constructor failed. Returned stduent Answer (%s) " + "but correct Answer is (%s)", t1.getStudentAnswer(), expectedstdAns);

assertTrue(errorMsg, t1.getStudentAnswer().equals(expectedstdAns));

}

@Test public void test_2_0() { String stdtest = "James,789654,D,C,A,D,A,B,C,D,B,C,A,B,D,C,A,A," + "A,C,A,B,B,D,B,D,A,B,B,A,C,B,C,A,C,B,B,C,C,C,A,B,A,B,B,C,A,B,A,A,D,C";

TestAnalytics t1 = new TestAnalytics(stdtest);

double expectedstdGrade = 100.0; final double THRESHOLD = .01; // test the student grade double stdGrade = t1.calculateStudentGrade(); String errorMsg = String.format( " Test findStudentGrade failed. Returned stduent Answer (%6.2f) " + "but correct Answer is (%6.2f)", stdGrade, expectedstdGrade);

assertTrue(errorMsg, Math.abs(expectedstdGrade - stdGrade)

}

@Test public void test_2_1() { String stdtest = "Robert,124554,D,C,A,D,A,B,C,C,B,C,A,B,D,C,A,A," + "A,C,A,B,B,D,B,D,A,B,B,A,C,B,C,A,C,B,B,C,C,C,A,B,A,B,B,C,A,B,A,A,D,C";

TestAnalytics t1 = new TestAnalytics(stdtest);

double expectedstdGrade = 98.0; final double THRESHOLD = .01; double stdGrade = t1.calculateStudentGrade(); String errorMsg = String.format( " Test findStudentGrade failed. Returned stduent Answer (%6.2f) " + "but correct Answer is (%6.2f)", stdGrade, expectedstdGrade); assertTrue(errorMsg, Math.abs(expectedstdGrade - stdGrade)

}

@Test public void test_2_3() { String stdtest = "David,9632587,D,C,A,D,A,B,C,C,B,C,A,B,D,C,A,A," + "A,C,A,B,B,D,B,D,A,B,B,A,C,B,C,A,C,B,B,c,c,c,a,b,b,b,c,a,b,a,a,d,a,d";

TestAnalytics t1 = new TestAnalytics(stdtest);

double expectedstdGrade = 82.0; final double THRESHOLD = .01; double stdGrade = t1.calculateStudentGrade();

String errorMsg = String.format( " Test findStudentGrade failed. Returned stduent Answer (%6.2f) " + "but correct Answer is (%6.2f)", stdGrade, expectedstdGrade); assertTrue(errorMsg, Math.abs(expectedstdGrade - stdGrade)

}

@Test public void test_2_4() {

String stdtest = "Richard,852369,d,a,a,D,D,d,b,D,b,c,d,D,d,B,B,D,b,d," + "c,D,A,B,a,D,b,a,C,a,C,C,c,c,b,b,a,a,c,C,d,b,d,b,A,d,D,c,A,C,c,C";

TestAnalytics t1 = new TestAnalytics(stdtest);

double expectedstdGrade = 36.0; final double THRESHOLD = .01; double stdGrade = t1.calculateStudentGrade();

String errorMsg = String.format( " Test findStudentGrade failed. Returned stduent Answer (%6.2f) " + "but correct Answer is (%6.2f)", stdGrade, expectedstdGrade); assertTrue(errorMsg, Math.abs(expectedstdGrade - stdGrade)

}

@Test public void test_2_5() {

String stdtest = "William,7854123,d,a,d,d,b,d,a,b,d,b,b,d,b,b," + "b,b,d,d,a,c,b,a,d,b,d,c,c,a,a,c,a,c,c,a,d,c,d,c,c,a,a,c,d,d,b,a,a,a,a,b";

TestAnalytics t1 = new TestAnalytics(stdtest);

double expectedstdGrade = 22.0; final double THRESHOLD = .01; double stdGrade = t1.calculateStudentGrade();

String errorMsg = String.format( " Test findStudentGrade failed. Returned stduent Answer (%6.2f) " + "but correct Answer is (%6.2f)", stdGrade, expectedstdGrade); assertTrue(errorMsg, Math.abs(expectedstdGrade - stdGrade)

}

@Test public void test_3_0() {

String stdtest = "William,85974,b,d,a,c,d,c,b,d,b,c,d,b,d,c,a,a,d,b,d,b,d,c,d,b," + "d,d,d,d,c,c,a,b,d,c,a,d,c,d,c,b,c,c,d,b,b,c,a,a,b,d";

TestAnalytics t1 = new TestAnalytics(stdtest);

String expectedstdfrq = "The frequency of the student(William) answer is A(7), B(12), C(13) and D(18)."; String stdfrq = t1.getStudentAnswerFrequency();

String errorMsg = String.format( " Test getStudentAnswerFrequency failed. Returned stduent answer frequency (%s) " + "but correct frq is (%s)", stdfrq, expectedstdfrq); assertTrue(errorMsg, stdfrq.equals(expectedstdfrq));

} @Test public void test_3_1() {

String stdtest = "Daniel,852369,C,B,C,A,A,D,B,C,C,A,B,C,C,D,B,A,C,B,C,C,D,C," + "C,A,B,C,C,D,D,D,D,C,A,A,D,B,C,D,C,C,C,A,A,B,D,D,C,B,D,C";

TestAnalytics t1 = new TestAnalytics(stdtest);

String expectedstdfrq = "The frequency of the student(Daniel) answer is A(9), B(9), C(20) and D(12)."; String stdfrq = t1.getStudentAnswerFrequency();

String errorMsg = String.format( " Test getStudentAnswerFrequency failed. Returned stduent answer frequency (%s) " + "but correct frq is (%s)", stdfrq, expectedstdfrq); assertTrue(errorMsg, stdfrq.equals(expectedstdfrq));

}

@Test public void test_3_2() {

String stdtest = "Matthew,12548796,a,C,B,a,a,a,c,D,a,D,C,d,c,B,D,c,D,A," + "b,D,a,D,c,d,A,c,C,a,D,a,D,d,A,D,A,A,B,d,B,C,B,D,d,B,C,B,c,C,D,B";

TestAnalytics t1 = new TestAnalytics(stdtest);

String expectedstdfrq = "The frequency of the student(Matthew) answer is A(13), B(9), C(12) and D(16)."; String stdfrq = t1.getStudentAnswerFrequency();

String errorMsg = String.format( " Test getStudentAnswerFrequency failed. Returned stduent answer frequency (%s) " + "but correct frq is (%s)", stdfrq, expectedstdfrq); assertTrue(errorMsg, stdfrq.equals(expectedstdfrq));

} @Test public void test_4_0() {

String stdtest = "William,85974,b,d,a,c,d,c,b,d,b,c,d,b,d,c,a,a,d,b,d,b,d,c,d,b," + "d,d,d,d,c,c,a,b,d,c,a,d,c,d,c,b,c,c,d,b,b,c,a,a,b,d";

TestAnalytics t1 = new TestAnalytics(stdtest);

String expectedteststr = "Student(William) failed the test. William answered (15) correct questions and scored ( 30.00) out of 100."; String testAnaStr = t1.toString();

String errorMsg = String.format( " Test toString failed. Returned string (%s) " + "but correct string is (%s)", testAnaStr, expectedteststr); assertTrue(errorMsg, testAnaStr.equals(expectedteststr));

} @Test public void test_4_2() {

String stdtest = "Anthony,852364,a,A,A,A,B,c,D,c,a,d,d,D,b,b,A,B,D,d,c,b,b,c," + "a,d,b,D,D,d,A,b,A,d,B,b,b,c,c,B,C,D,C,b,d,B,c,c,d,B,d,D";

TestAnalytics t1 = new TestAnalytics(stdtest);

String expectedteststr = "Student(Anthony) failed the test. Anthony answered (12) correct questions and scored ( 24.00) out of 100."; String testAnaStr = t1.toString();

String errorMsg = String.format( " Test toString failed. Returned string (%s) " + "but correct string is (%s)", testAnaStr, expectedteststr); assertTrue(errorMsg, testAnaStr.equals(expectedteststr));

} @Test public void test_4_3() {

String stdtest = "Robert,124554,D,C,A,D,A,B,C,C,B,C,A,B,D,C,A,A," + "A,C,A,B,B,D,B,D,A,B,B,A,C,B,C,A,C,B,B,C,C,C,A,B,A,B,B,C,A,B,A,A,D,C";

TestAnalytics t1 = new TestAnalytics(stdtest);

String expectedteststr = "Student(Robert) passed the test. Robert answered (49) correct questions and scored ( 98.00) out of 100."; String testAnaStr = t1.toString();

String errorMsg = String.format( " Test toString failed. Returned string (%s) " + "but correct string is (%s)", testAnaStr, expectedteststr); assertTrue(errorMsg, testAnaStr.equals(expectedteststr));

} }

Requirements:

Any use of Java library classes or methods (e.g., ArrayList, System.arraycopy) is forbidden. That is, there must not be any import statement at the beginning of this class.

For the JUnit test cases class JunitTest_TestAnalyticsTest.java given to you a. Do not modify the test methods given to you. b. You are allowed to add new test cases by creating new test methods.

For each method which you are required to implement, derived from the JUnit test methods:

a. No System.out.println statements should appear in it. b. No Scanner operations (e.g., input.nextInt()) should appear in it. Instead, declare

the method's input parameters as indicated by the JUnit tests.

Hint: You may use java.util.Arrays class, class Character or Class String. 2

We have a test of 50 multiple-choice questions where each question has four choices (A/a, B/b, C/c, D/d). Students used a test system to attempt the test. At the end of the test, the system generated a string containing the following information: student name, student ID, and the student answers for the 50 questions. Note that the generated string is comma separated. For examples: Examplel: Liam,463636,A,B,c,c,D,d,c,a,b,A,c,a,D,b,a,A,d,B,C,C,D,d,d,C,A,A,A,a,A,c,C,D,C,B,D,B,C,A,a,b,d,B,b,c, C,A,b,C,a,C Example2: Ava,58585,b,d,b,D,D,a,c,b,a,D,D,d,c,d,d,D,d,a,D,A,b,d,c,d,D,D,a,d,d,d,D,b,d,d,d,c,A,d,d,a,c,b,D,d,c,a,a,D, b,b Note that the generated string contains uppercase and lowercase to represent student answer for each multiple-choice question. There are 50 answers. Your task is to extract useful information and generate the grade for the student using the following facts: . Test key or correct answers: D,C,A,D,A,B,C,D,B,C,A,B,D,C,A,A,A,C,A,B,B,D,B,D,A,B,B,A,C,B,C,A, C,B,B,C,C,C,A,B,A,B, B,C,A,B,A,A, D,C 3 . The student will receive two marks for each correct answer and zero for each wrong answer. . The student's final grade on this test will be out of 100