apache/gravitino

[Improvement] Creating a namespace from just white space should not be allowed

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#7,958 opened on Aug 7, 2025

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 (8 comments) (0 reactions) (1 assignee)Java (887 forks)auto 404
good first issueimprovement

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Description

What would you like to be improved?

Update this test to the following, and the test will fail.

  @Test
  public void testFromStringInvalidArgs() {
    Assertions.assertThrows(IllegalArgumentException.class, () -> Namespace.fromString(null));
    Assertions.assertThrows(IllegalArgumentException.class, () -> Namespace.fromString(".a"));
    Assertions.assertThrows(IllegalArgumentException.class, () -> Namespace.fromString("a."));
    Assertions.assertThrows(IllegalArgumentException.class, () -> Namespace.fromString("a..b"));
    Assertions.assertThrows(IllegalArgumentException.class, () -> Namespace.fromString(" "));
  }

How should we improve?

Update Namespace.fromString to throw a IllegalArgumentException if given a namespace that is just whitespace

Contributor guide

Research direction
Add a check in Namespace.fromString to reject whitespace only strings and update the corresponding test method testFromStringInvalidArgs to include the new assertion.
Tech stack
java
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Java
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80