testing my code with junit tester did not work i get errors

Question

hi there I am trying to test my code java code with JUnit test case
but there is a problem with the tester I don't know what it is, happy to get from your review and guides

here is the code>>

import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;

class Ex2_Test {
static double[] po1={2,0,3, -1,0}, 
        po2 = {0.1,0,1, 0.1,3};
static final double EPS = 0.0001;

@Test
void testF() {
    double fx0 = Ex2.f(po1, 0);
    double fx1 = Ex2.f(po1, 1);
    double fx2 = Ex2.f(po1, 2);
    assertEquals()
    assertEquals(fx0,2);
    assertEquals(fx1,4);
    assertEquals(fx2,6);
}



@Test
void testRoot() {
    double x12 = Ex2.root(po1, 0, 10, EPS);
    assertEquals(x12, 3.1958, 0.001);
}

@Test
void testDerivativeArrayDoubleArray() {
    double[] p = {1,2,3}; // 3X^2+2x+1
    double[] dp1 = {2,6}; // 6x+2
    double[] dp2 = Ex2.derivative(p);
    assertEquals(dp1[0], dp2[0],EPS);
    assertEquals(dp1[1], dp2[1],EPS);
    assertEquals(dp1.length, dp2.length);
}
}

and here is the errors messages>>

The method assertEquals() is undefined for the type Ex2_Test The import org.junit cannot be resolved

The method assertEquals(double, int) is undefined for the type Ex2_Test

Test cannot be resolved to a type

The method assertEquals(double, double, double) is undefined for the type Ex2_Test

The method assertEquals(int, int) is undefined for the type Ex2_Test

The method assertEquals(double, double, double) is undefined for the type Ex2_Test

please check the image here>>

Could you please add some information about how you build/run your project. Do you use Maven for dependencies or do you import them through your IDE? — olovholm, Nov 29 '20 at 20:46
You need to include / import JUnit as a dependency in your project. — stridecolossus, Nov 29 '20 at 20:49
can you guide me how? @stridecolossus i have added this extension "Java Test Runner" https://marketplace.visualstudio.com/items?itemName=vscjava.vscode-java-test — loai shark, Nov 29 '20 at 20:51
@loaishark Never used VS for Java (didn't realise you could tbh) but maybe [this](https://stackoverflow.com/questions/56674827/junit-in-visual-studio-code) helps? — stridecolossus, Nov 29 '20 at 20:54
i am using the "Java Test Runner" extension to test my code here is the link>> https://marketplace.visualstudio.com/items?itemName=vscjava.vscode-java-test @olovholm — loai shark, Nov 29 '20 at 20:57
https://stackoverflow.com/questions/56674827/junit-in-visual-studio-code — Polygnome, Nov 29 '20 at 20:57
i am getting this error on the import >The import org.junit cannot be resolvedJava(268435846) @Polygnome — loai shark, Nov 29 '20 at 21:07

Molly Wang · Answer 1 · 2020-11-30T08:43:42.100

2

Download JUnit.jar and add it to referenced library;

Add the following import sentences;

 import org.junit.Test;
 import static org.junit.Assert.*;

About testing, you can refer to Testing Java with Visual Studio Code.

edited Nov 30 '20 at 08:43

answered Nov 30 '20 at 07:27

Molly Wang

2,246
1
1
9

@loai shark, does my answer solve your question? – Molly Wang Dec 01 '20 at 01:57
check this image >>https://prnt.sc/w3g6ei it is testing the function sum return x+y here but there is an error here are the tester result >> https://prnt.sc/w3g7q5 – loai shark Dec 15 '20 at 20:11

score 0 · Answer 2 · edited Nov 30 '20 at 14:38

0

Check you added package the jUnit.jar or testNG.rar
Import sentences: import org.junit.Test; import static org.junit.Assert.*;

edited Nov 30 '20 at 14:38

Thân LƯƠNG

2,269
2
9
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answered Nov 30 '20 at 12:26

Hamza Ze

1

check this image >>https://prnt.sc/w3g6ei it is testing the function sum return x+y here but there is an error here are the tester result >> https://prnt.sc/w3g7q5 – loai shark Dec 15 '20 at 20:09

testing my code with junit tester did not work i get errors

2 Answers2