Issue #2971 display names #3055

manjarekarsudip · 2025-11-17T19:16:55Z

Pull request

Description

Added @DisplayName annotations to test methods based on canonical data

Changes

Added DisplayName annotations to the following exercises:

dnd-character
error-handling
hangman
markdown
matching-brackets
mazy-mice
parallel-letter-frequency
pascals-triangle
perfect-numbers
phone-number
piecing-it-together
poker
robot-name
simple-linked-list

Testing

All tests pass successfully (verified with ./gradlew test)

Related Issue

Addresses #2971 (DisplayName annotations initiative)

Note

Below 2 exercises are the ones that i observed have the changes done as per the requirement but the checkbox is bot ticked.

luhn
square-root

Reviewer Resources:

Track Policies

github-actions · 2025-11-17T19:17:03Z

This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

If this PR does not affect the result of the test (or, for example, adds an edge case that is not worth rerunning all tests for), please add the following to the merge-commit message which will stops student's tests from re-running. Please copy-paste to avoid typos.

[no important files changed]

For more information, refer to the documentation. If you are unsure whether to add the message or not, please ping @exercism/maintainers-admin in a comment. Thank you!

jagdish-15

Can you apply these small changes:

jagdish-15 · 2025-11-18T04:47:30Z

exercises/practice/hangman/src/test/java/HangmanTest.java

 import io.reactivex.disposables.Disposable;
 import org.junit.jupiter.api.BeforeEach;


Suggested change

import io.reactivex.disposables.Disposable;

import org.junit.jupiter.api.BeforeEach;

import io.reactivex.disposables.Disposable;

import org.junit.jupiter.api.BeforeEach;

jagdish-15 · 2025-11-18T04:49:25Z

exercises/practice/pascals-triangle/src/test/java/PascalsTriangleGeneratorTest.java

 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.DisplayName;


Suggested change

import org.junit.jupiter.api.Disabled;

import org.junit.jupiter.api.Test;

import org.junit.jupiter.api.DisplayName;

import org.junit.jupiter.api.Disabled;

import org.junit.jupiter.api.DisplayName;

import org.junit.jupiter.api.Test;

jagdish-15

@kahgoh, I need your suggestion on a few of these:

jagdish-15 · 2025-11-18T05:19:01Z

exercises/practice/dnd-character/src/test/java/DnDCharacterTest.java

    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Ability modifier for score 18 is 4")
    public void testAbilityModifierForScore18Is4() {
        assertThat(dndCharacter.modifier(18)).isEqualTo(4);
    }


Can you please keep all of them the same as the descriptions in the canonical-data.json file?

And something to discuss, @kahgoh: only the tests up to this one are fully in sync with the canonical data. There are three more tests after this: random character is valid, random ability is within range, and each ability is only calculated once. But there are several extra tests in this file that are not present in the canonical data. Do you think we should keep them or make this file consistent with the canonical data?

jagdish-15 · 2025-11-18T05:23:12Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws a checked exception (not a RuntimeException)")


@kahgoh
This exercise doesn't have a canonical-data.json file, and I think we can go ahead with these descriptions. Do you have any nits for these?

jagdish-15 · 2025-11-18T05:26:00Z

exercises/practice/hangman/src/test/java/HangmanTest.java

    }

    @Test
+    @DisplayName("Initial game state is set correctly for a new word")


The same goes with this one!
@kahgoh Do you have any nits for the descriptions?

jagdish-15 · 2025-11-18T05:27:53Z

exercises/practice/markdown/src/test/java/MarkdownTest.java

    }

    @Test
+    @DisplayName("Plain text is wrapped in a paragraph")


@manjarekarsudip
All these should be in line with the canonical-data.json file

jagdish-15 · 2025-11-18T05:28:49Z

exercises/practice/matching-brackets/src/test/java/BracketCheckerTest.java

 public class BracketCheckerTest {

    @Test
+    @DisplayName("Paired square brackets are matched and valid")


Here-
https://github.com/exercism/problem-specifications/blob/main/exercises/matching-brackets/canonical-data.json

jagdish-15 · 2025-11-18T05:38:13Z

exercises/practice/perfect-numbers/src/test/java/NaturalNumberTest.java

 public class NaturalNumberTest {

    @Test
+    @DisplayName("Small perfect number (6) is classified as PERFECT")


https://github.com/exercism/problem-specifications/blob/main/exercises/perfect-numbers/canonical-data.json#L9

jagdish-15 · 2025-11-18T05:38:53Z

exercises/practice/phone-number/src/test/java/PhoneNumberTest.java

 public class PhoneNumberTest {

    @Test
+    @DisplayName("Cleans common formatted number to digits only")


https://github.com/exercism/problem-specifications/blob/main/exercises/phone-number/canonical-data.json

jagdish-15 · 2025-11-18T05:40:00Z

exercises/practice/piecing-it-together/src/test/java/PiecingItTogetherTest.java

    private static final double DOUBLE_EQUALITY_TOLERANCE = 1e-9;

    @Test
+    @DisplayName("Complete information from pieces and aspect ratio is calculated")


https://github.com/exercism/problem-specifications/blob/main/exercises/piecing-it-together/canonical-data.json#L12

jagdish-15 · 2025-11-18T05:40:49Z

exercises/practice/poker/src/test/java/PokerTest.java


 public class PokerTest {
    @Test
+    @DisplayName("Single hand returns itself as best hand")


https://github.com/exercism/problem-specifications/blob/main/exercises/poker/canonical-data.json#L6

jagdish-15 · 2025-11-18T05:46:35Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Generated maze with seed is perfect (single path, no isolated cells)")


Again, this one seems to be a Java track-specific exercise, so it has no mention in the problem-specifications repo. I think we can go ahead with this one. Let's see what @kahgoh says about this

manjarekarsudip · 2025-11-20T16:49:52Z

Is any other change required in any file? @jagdish-15

jagdish-15

For the exercises that don’t have a canonical-data.json file, I’ll need to give detailed changes for each of them. And for all the exercises that do have a canonical-data.json file, here’s the only change required:

jagdish-15 · 2025-11-20T18:07:44Z

exercises/practice/parallel-letter-frequency/src/test/java/ParallelLetterFrequencyTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("many small texts")


Can you replace this test and the one below it with each other, so the order is the same as that in the canonical data

jagdish-15

This is done for the error-handling exercise. Now the descriptions will be more consistent with each other and follow a similar (standardised) format like the canonical data

jagdish-15 · 2025-11-20T19:00:05Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java

    private ErrorHandling errorHandling = new ErrorHandling();

    @Test
+    @DisplayName("Throws a general exception when requested")


Suggested change

@DisplayName("Throws a general exception when requested")

@DisplayName("Throws IllegalArgumentException")

jagdish-15 · 2025-11-20T19:01:32Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws a checked exception (not a RuntimeException)")


Suggested change

@DisplayName("Throws a checked exception (not a RuntimeException)")

@DisplayName("Throws any checked exception")

jagdish-15 · 2025-11-20T19:03:26Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws a checked exception with the provided detail message")


Suggested change

@DisplayName("Throws a checked exception with the provided detail message")

@DisplayName("Throws any checked exception with provided detail message")

jagdish-15 · 2025-11-20T19:05:50Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws an unchecked RuntimeException when requested")


Suggested change

@DisplayName("Throws an unchecked RuntimeException when requested")

@DisplayName("Throws any unchecked exception")

jagdish-15 · 2025-11-20T19:06:36Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws an unchecked RuntimeException with provided detail message")


Suggested change

@DisplayName("Throws an unchecked RuntimeException with provided detail message")

@DisplayName("Throws any unchecked exception with provided detail message")

jagdish-15 · 2025-11-20T19:08:35Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws a custom checked exception")


Suggested change

@DisplayName("Throws a custom checked exception")

@DisplayName("Throws custom checked exception")

jagdish-15 · 2025-11-20T19:09:06Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws a custom checked exception with provided message")


Suggested change

@DisplayName("Throws a custom checked exception with provided message")

@DisplayName("Throws custom checked exception with provided detail message")

jagdish-15 · 2025-11-20T19:09:36Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws a custom unchecked exception")


Suggested change

@DisplayName("Throws a custom unchecked exception")

@DisplayName("Throws custom unchecked exception")

jagdish-15 · 2025-11-20T19:10:05Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws a custom unchecked exception with provided message")


Suggested change

@DisplayName("Throws a custom unchecked exception with provided message")

@DisplayName("Throws custom unchecked exception with provided detail message")

jagdish-15 · 2025-11-20T19:17:16Z

exercises/practice/error-handling/src/test/java/ErrorHandlingTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Returns Optional<Integer> for valid input and empty Optional for invalid input")


Suggested change

@DisplayName("Returns Optional<Integer> for valid input and empty Optional for invalid input")

@DisplayName("Handles error by throwing Optional instance")

jagdish-15

This one doesn’t have many changes. The few that are there are to make the descriptions a bit more compact

jagdish-15 · 2025-11-20T19:27:03Z

exercises/practice/hangman/src/test/java/HangmanTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Cannot play the same correct guess twice")


Suggested change

@DisplayName("Cannot play the same correct guess twice")

@DisplayName("Cannot play the same guess twice")

jagdish-15 · 2025-11-20T19:27:39Z

exercises/practice/hangman/src/test/java/HangmanTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Losing the game results in LOSS status and all parts present")


Suggested change

@DisplayName("Losing the game results in LOSS status and all parts present")

@DisplayName("Losing the game results in LOSS status")

jagdish-15 · 2025-11-20T19:28:15Z

exercises/practice/hangman/src/test/java/HangmanTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Winning the game reveals full word and marks WIN status")


Suggested change

@DisplayName("Winning the game reveals full word and marks WIN status")

@DisplayName("Winning the game results in WIN status")

jagdish-15 · 2025-11-20T19:30:03Z

exercises/practice/hangman/src/test/java/HangmanTest.java

    }

    @Test
+    @DisplayName("Initial game state is set correctly for a new word")


Suggested change

@DisplayName("Initial game state is set correctly for a new word")

@DisplayName("Initial game state is set correctly")

jagdish-15

After these changes, you’ll notice some test descriptions start with Maze, some with Mazes, and some with Throws. Please move the two perfect checking tests whose descriptions start with Maze above the ones whose start with Mazes, so the groups are ordered cleanly.

jagdish-15 · 2025-11-20T19:36:17Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java

    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Maze has a single entrance on the left side")
    public void theMazeHasOnlyOneEntranceOnTheLeftSide() {


Suggested change

public void theMazeHasOnlyOneEntranceOnTheLeftSide() {

public void theMazeHasSingleEntranceOnTheLeftSide() {

jagdish-15 · 2025-11-20T19:36:37Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java

    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Maze has a single exit on the right side")
    public void theMazeHasSingleExitOnTheRightSideOfTheMaze() {


Suggested change

public void theMazeHasSingleExitOnTheRightSideOfTheMaze() {

public void theMazeHasSingleExitOnTheRightSide() {

jagdish-15 · 2025-11-20T19:37:07Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java

    }

    @Test
+    @DisplayName("Generated maze has correct overall dimensions")


Suggested change

@DisplayName("Generated maze has correct overall dimensions")

@DisplayName("Maze has correct overall dimensions")

jagdish-15 · 2025-11-20T19:37:43Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Maze contains only allowed characters")


Suggested change

@DisplayName("Maze contains only allowed characters")

@DisplayName("Maze contains only valid characters")

Let's keep the keyword the same in the test name and the description

jagdish-15 · 2025-11-20T19:46:12Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Consecutive maze generations produce different mazes")


Suggested change

@DisplayName("Consecutive maze generations produce different mazes")

@DisplayName("Maze is different each time it is generated")

Let's try to keep it consistent with the others

jagdish-15 · 2025-11-20T19:50:28Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Generated maze with seed is perfect (single path, no isolated cells)")


Suggested change

@DisplayName("Generated maze with seed is perfect (single path, no isolated cells)")

@DisplayName("Maze with a seed is generated perfectly (single path, no isolated cells)")

jagdish-15 · 2025-11-20T19:54:37Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws when rows less than minimum allowed")


Suggested change

@DisplayName("Throws when rows less than minimum allowed")

@DisplayName("Throws when rows are less than five")

jagdish-15 · 2025-11-20T19:55:02Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws when columns less than minimum allowed")


Suggested change

@DisplayName("Throws when columns less than minimum allowed")

@DisplayName("Throws when columns are less than five")

jagdish-15 · 2025-11-20T19:55:27Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws when rows exceed maximum allowed")


Suggested change

@DisplayName("Throws when rows exceed maximum allowed")

@DisplayName("Throws when rows exceed hundred")

jagdish-15 · 2025-11-20T19:55:47Z

exercises/practice/mazy-mice/src/test/java/MazeGeneratorTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Throws when columns exceed maximum allowed")


Suggested change

@DisplayName("Throws when columns exceed maximum allowed")

@DisplayName("Throws when columns exceed hundred")

jagdish-15

Just a few nits:

jagdish-15 · 2025-11-20T20:03:06Z

exercises/practice/robot-name/src/test/java/RobotTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Robot names are unique in a large sample")


Suggested change

@DisplayName("Robot names are unique in a large sample")

@DisplayName("Robot names are unique")

jagdish-15 · 2025-11-20T20:03:24Z

exercises/practice/robot-name/src/test/java/RobotTest.java

    }

    @Test
+    @DisplayName("Robot has a valid name matching the pattern")


Suggested change

@DisplayName("Robot has a valid name matching the pattern")

@DisplayName("Robot has a valid name")

jagdish-15 · 2025-11-20T20:06:09Z

exercises/practice/simple-linked-list/src/test/java/SimpleLinkedListTest.java

 public class SimpleLinkedListTest {

    @Test
+    @DisplayName("A new list is empty with size zero")


Suggested change

@DisplayName("A new list is empty with size zero")

@DisplayName("A new list is empty")

jagdish-15 · 2025-11-20T20:06:47Z

exercises/practice/simple-linked-list/src/test/java/SimpleLinkedListTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Create list from array sets correct size")


Suggested change

@DisplayName("Create list from array sets correct size")

@DisplayName("Create list from array")

jagdish-15 · 2025-11-20T20:09:30Z

exercises/practice/simple-linked-list/src/test/java/SimpleLinkedListTest.java


    @Disabled("Remove to run test")
    @Test
+    @DisplayName("Convert list to array returns correct element order")


Suggested change

@DisplayName("Convert list to array returns correct element order")

@DisplayName("Can return list as an array")

exercises/practice/simple-linked-list/src/test/java/SimpleLinkedListTest.java

jagdish-15 · 2025-11-20T20:14:55Z

Just a general tip: instead of clicking Commit suggestion for each one, use Add suggestion to batch and make a single commit per exercise. Or you can make the changes locally and commit each exercise separately.
Please make sure not to miss any changes.

…ssue-2971-display-names

jagdish-15 · 2025-11-23T16:04:23Z

Looks good to me, thanks!

manjarekarsudip · 2025-11-23T17:12:47Z

Looks good to me, thanks!

Welcome

manjarekarsudip added 14 commits November 17, 2025 23:46

Added DisplayName to DnDCharacterTest

29f2d68

Added DisplayName to SimpleLinkedListTest

cf13ec2

Added DisplayName to RobotTest

1ec5bfa

Added DisplayName to PokerTest

abeab3c

Added DisplayName to PiecingItTogetherTest

240a2d2

Added DisplayName to PhoneNumberTest

b78d58c

Added DisplayName to NaturalNumberTest

8947790

Added DisplayName to PascalsTriangleGeneratorTest

d742b56

Added DisplayName to ParallelLetterFrequencyTest

0911db6

Added DisplayName to MazeGeneratorTest

3263b85

Added DisplayName to ErrorHandlingTest

b00d461

Added DisplayName to BracketCheckerTest

4b9f11a

Added DisplayName to HangmanTest

caa9560

Added DisplayName to MarkdownTest

d96f651

jagdish-15 requested changes Nov 18, 2025

View reviewed changes

jagdish-15 requested a review from kahgoh November 18, 2025 10:47

manjarekarsudip and others added 3 commits November 19, 2025 00:21

Changes done as per canonical-data.json

991ec6c

Merge branch 'main' into issue-2971-display-names

7b1165b

Merge branch 'main' into issue-2971-display-names

b382016

jagdish-15 requested changes Nov 20, 2025

View reviewed changes

manjarekarsudip added 2 commits November 22, 2025 11:25

Add suggestion to ErrorHandlingTest

a51cf75

Add suggestion to HangmanTest

5f39489

manjarekarsudip added 5 commits November 22, 2025 11:26

Add suggestion to MazeGeneratorTest

44618f2

Add suggestion to ParallelLetterFrequencyTest

37981c3

Add suggestion to RobotTest

6db2931

Add suggestion to SimpleLinkedListTest

9805fec

Merge remote-tracking branch 'origin/issue-2971-display-names' into i…

311de45

…ssue-2971-display-names

manjarekarsudip requested a review from jagdish-15 November 22, 2025 06:03

jagdish-15 removed the request for review from kahgoh November 23, 2025 15:44

Changing orders of tests to keep similar tests together

40302ea

jagdish-15 approved these changes Nov 23, 2025

View reviewed changes

jagdish-15 merged commit 7b72f07 into exercism:main Nov 23, 2025
6 checks passed

		import io.reactivex.disposables.Disposable;
		import org.junit.jupiter.api.BeforeEach;

	@DisplayName("Throws a general exception when requested")
	@DisplayName("Throws IllegalArgumentException")

	@DisplayName("Throws a checked exception (not a RuntimeException)")
	@DisplayName("Throws any checked exception")

	@DisplayName("Throws an unchecked RuntimeException when requested")
	@DisplayName("Throws any unchecked exception")

	@DisplayName("Throws a custom checked exception")
	@DisplayName("Throws custom checked exception")

	@DisplayName("Throws a custom unchecked exception")
	@DisplayName("Throws custom unchecked exception")

	@DisplayName("Returns Optional<Integer> for valid input and empty Optional for invalid input")
	@DisplayName("Handles error by throwing Optional instance")

	@DisplayName("Cannot play the same correct guess twice")
	@DisplayName("Cannot play the same guess twice")

	@DisplayName("Losing the game results in LOSS status and all parts present")
	@DisplayName("Losing the game results in LOSS status")

	@DisplayName("Winning the game reveals full word and marks WIN status")
	@DisplayName("Winning the game results in WIN status")

	@DisplayName("Initial game state is set correctly for a new word")
	@DisplayName("Initial game state is set correctly")

	public void theMazeHasOnlyOneEntranceOnTheLeftSide() {
	public void theMazeHasSingleEntranceOnTheLeftSide() {

	public void theMazeHasSingleExitOnTheRightSideOfTheMaze() {
	public void theMazeHasSingleExitOnTheRightSide() {

	@DisplayName("Generated maze has correct overall dimensions")
	@DisplayName("Maze has correct overall dimensions")

	@DisplayName("Maze contains only allowed characters")
	@DisplayName("Maze contains only valid characters")

	@DisplayName("Consecutive maze generations produce different mazes")
	@DisplayName("Maze is different each time it is generated")

	@DisplayName("Generated maze with seed is perfect (single path, no isolated cells)")
	@DisplayName("Maze with a seed is generated perfectly (single path, no isolated cells)")

	@DisplayName("Throws when rows less than minimum allowed")
	@DisplayName("Throws when rows are less than five")

	@DisplayName("Throws when columns less than minimum allowed")
	@DisplayName("Throws when columns are less than five")

	@DisplayName("Throws when rows exceed maximum allowed")
	@DisplayName("Throws when rows exceed hundred")

Uh oh!

Issue #2971 display names #3055

Issue #2971 display names #3055

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Conversation

manjarekarsudip commented Nov 17, 2025

Pull request

Description

Changes

Testing

Related Issue

Note

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github-actions bot commented Nov 17, 2025

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manjarekarsudip commented Nov 20, 2025

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jagdish-15 Nov 18, 2025 •

edited

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jagdish-15 Nov 18, 2025 •

edited

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	@DisplayName("Throws when columns exceed maximum allowed")
	@DisplayName("Throws when columns exceed hundred")

	@DisplayName("Robot names are unique in a large sample")
	@DisplayName("Robot names are unique")

	@DisplayName("Robot has a valid name matching the pattern")
	@DisplayName("Robot has a valid name")

	@DisplayName("A new list is empty with size zero")
	@DisplayName("A new list is empty")

	@DisplayName("Create list from array sets correct size")
	@DisplayName("Create list from array")

	@DisplayName("Convert list to array returns correct element order")
	@DisplayName("Can return list as an array")