问题：
JUnit5测试空洞法。获取org.opentest4j.assertionFailedError：需要：
郭志
package com.*.text;
import com.*.math.Divider;
import com.*.model.Result;
/**
* text sub package - for formatters
*/
public class Formatter {
Result result;
Divider divider;
private int firstIndexPartialDividend = 0; // find the beginning of the number
private int countSpace = 0; // space counter
public Formatter(Result result) {
this.result = result;
this.divider = new Divider(result);
}
public void format() {
// print the first row
printFirstRow();
String dividendText = Integer.toString(result.getDividend());
for (int i = 1; i <= dividendText.length(); i++) {
result.setFirstPartialDividend(Integer.parseInt(dividendText.substring(firstIndexPartialDividend, i)));
// print the second row
if (result.getFirstPartialDividend() >= result.getDivisor()
&& firstIndexPartialDividend == 0) {
countSpace = dividendText.length() - i;
printSecondRow(result.getFirstPartialDividend());
result.setRemainder(result.getFirstPartialDividend()
- result.getProduct());
firstIndexPartialDividend = i;
// To align the space in the next row.
if (Integer.toString(result.getProduct()).length()
> Integer.toString(result.getRemainder()).length()
&& result.getRemainder() > 0) {
countSpace = Integer.toString(result.getProduct()).length()
- Integer.toString(result.getRemainder()).length();
} else {
countSpace = 0;
}
// print following row
} else if (firstIndexPartialDividend > 0) {
if (Integer.toString(result.getProduct()).length() / 2
== Integer.toString(result.getRemainder()).length()
&& Integer.toString(result.getRemainder()).length() > 1) {
countSpace++;
}
int nextPartialDividend
= Integer.parseInt(Integer.toString(result.getRemainder())
+ dividendText.substring(firstIndexPartialDividend, i));
printFollowingRow(nextPartialDividend, dividendText, i);
// print last row
printLastRow(dividendText, i);
}
}
}
/**
* printFirstRow method - print the first row of an application
*/
public void printFirstRow() {
System.out.printf("%d|%d\n", result.getDividend(), result.getDivisor());
}
/**
* printSecondRow method - print the second row of an application
*/
public void printSecondRow(int firstPartialDividend) {
divider.calculateProduct(firstPartialDividend);
System.out.println(result.getProduct() + getSpace(countSpace) + "|"
+ (result.getQuotient()));
}
/**
* printFollowingRow method - print all following row of an application
* except for the last row
*/
public void printFollowingRow(int nextPartialDividend, String dividendText, int i) {
if (nextPartialDividend >= result.getDivisor()) {
divider.calculateProduct(nextPartialDividend);
alignFollowingRowSpace(nextPartialDividend, dividendText, i);
result.setRemainder(nextPartialDividend - result.getProduct());
firstIndexPartialDividend = i;
}
}
/**
* alignFollowingRowSpace method - align following rows by space
*/
public void alignFollowingRowSpace(int nextPartialDividend, String dividendText, int i) {
if (Integer.toString(nextPartialDividend).length()
> 0 && result.getRemainder() > 0) {
if (Integer.toString(result.getProduct()).length()
!= Integer.toString(nextPartialDividend).length()) {
if (i == dividendText.length()) {
countSpace = Integer.toString(result.getProduct()).length()
- Integer.toString(result.getRemainder()).length();
} else {
countSpace = Integer.toString(result.getProduct()).length()
- Integer.toString(result.getRemainder()).length()
+ countSpace;
}
System.out.println(getSpace(countSpace) + nextPartialDividend);
countSpace++;
System.out.println(getSpace(countSpace) + result.getProduct());
countSpace--;
} else if (Integer.toString(nextPartialDividend).length()
!= Integer.toString(result.getRemainder()).length()
&& Integer.toString(result.getRemainder()).length() > 0) {
System.out.println(getSpace(countSpace) + nextPartialDividend);
System.out.println(getSpace(countSpace) + result.getProduct());
if (Integer.toString(nextPartialDividend).length()
== Integer.toString(nextPartialDividend - result.getProduct()).length()
&& Integer.toString(result.getProduct()).length()
== Integer.toString(nextPartialDividend - result.getProduct()).length()) {
// Stub for save value countSpace
} else {
countSpace++;
}
} else {
countSpace = Integer.toString(result.getProduct()).length()
- Integer.toString(result.getRemainder()).length()
+ countSpace;
System.out.println(getSpace(countSpace) + nextPartialDividend);
System.out.println(getSpace(countSpace) + result.getProduct());
}
} else if (Integer.toString(nextPartialDividend).length() > 0
&& result.getRemainder() == 0) {
countSpace = Integer.toString(result.getProduct()).length()
+ countSpace;
System.out.println(getSpace(countSpace) + nextPartialDividend);
System.out.println(getSpace(countSpace) + result.getProduct());
}
}
/**
* printLastRow method - print the last line of the application
*/
public void printLastRow(String dividendText, int i) {
if (i == dividendText.length() && result.getRemainder() > 0) {
countSpace = dividendText.length() - Integer.toString(result.getRemainder()).length();
System.out.println(getSpace(countSpace) + result.getRemainder());
} else if (i == dividendText.length()) {
countSpace = dividendText.length() - dividendText.substring(firstIndexPartialDividend, i).length();
System.out.println(getSpace(countSpace) + dividendText.substring(firstIndexPartialDividend, i));
}
}
/**
* getSpace method to get the number of spaces you want
*/
public String getSpace(int count) {
String space = "";
for (int i = 0; i < count; i++)
space += " ";
return space;
}
}
78454|4
4 |19613
38
36
24
24
5
4
14
12
2
package com.*.text;
import com.*.math.Divider;
import com.*.model.Result;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class FormatterTest {
Result result;
Divider divider;
Formatter formatter;
private final ByteArrayOutputStream outputStreamCaptor = new ByteArrayOutputStream();
@BeforeEach
public void setUp(){
System.setOut(new PrintStream(outputStreamCaptor));
this.result = new Result();
this.formatter = new Formatter(this.result);
this.divider = new Divider(result);
String[] testArray = new String[] {"78454", "4"};
this.divider.divide(Integer.parseInt(testArray[0]), Integer.parseInt(testArray[1]));
}
@Test
void format() {
String expectedResult = "78454|4\n4 |19613\n38\n36\n 24\n 24\n 5\n 4\n 14\n 12\n 2";
formatter.format();
String actualResult = outputStreamCaptor.toString().trim();
assertEquals(expectedResult, actualResult);
}
}
expected: <78454|4
4 |19613
38
36
24
24
5
4
14
12
2> but was: <78454|4
4 |19613
38
36
24
24
5
4
14
12
2>
<Click to see difference>
org.opentest4j.AssertionFailedError: expected: <78454|4
4 |19613
38
36
24
24
5
4
14
12
2> but was: <78454|4
4 |19613
38
36
24
24
5
4
14
12
2>
at app//org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
at app//org.junit.jupiter.api.AssertionUtils.failNotEqual(AssertionUtils.java:62)
at app//org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:182)
at app//org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:177)
at app//org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:1124)
at app//com.gmail.smaglenko.division.text.FormatterTest.format(FormatterTest.java:37)
at java.base@16.0.2/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base@16.0.2/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
at java.base@16.0.2/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base@16.0.2/java.lang.reflect.Method.invoke(Method.java:567)
at app//org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:686)
at app//org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
at app//org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
at app//org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
at app//org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)
at app//org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)
at app//org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
at app//org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
at app//org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
at app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
at app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
at app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
at app//org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
at app//org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
at app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:205)
at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:201)
at app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:137)
at app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:71)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)
at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
at app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at java.base@16.0.2/java.util.ArrayList.forEach(ArrayList.java:1511)
at app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
at app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at java.base@16.0.2/java.util.ArrayList.forEach(ArrayList.java:1511)
at app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
at app//org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at app//org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at app//org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:99)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:79)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:75)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:61)
at java.base@16.0.2/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base@16.0.2/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
at java.base@16.0.2/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base@16.0.2/java.lang.reflect.Method.invoke(Method.java:567)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at jdk.proxy1/jdk.proxy1.$Proxy2.stop(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run(TestWorker.java:193)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:133)
at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:71)
at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
FormatterTest > format() FAILED
org.opentest4j.AssertionFailedError at FormatterTest.java:37
请分享你对它可能是什么的想法
提前感谢！
共有1个答案
梅安平
我使用debug找到了答案。我的期望应该是
String expectedResult = "78454|4\n4 |19613\r\n38\r\n36\r\n 24\r\n 24\r\n 5\r\n 4\r\n 14\r\n 12\r\n 2";
而不是
String expectedResult = "78454|4\n4 |19613\n38\n36\n 24\n 24\n 5\n 4\n 14\n 12\n 2";
因为我用的是windows
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