chore: temporarily fix test to cater for maven cache issue (#6020)

* chore: temporarily fix test to cater for maven cache issue * include source code comment and fix syntax

Author: mpeddada1

tests/src/test/java/com/google/cloud/BomContentTest.java

@@ -110,13 +110,22 @@ static void checkBomReachable(Path bomPath) throws Exception {
  }
 
  private static String buildMavenCentralUrl(Artifact artifact) {
+ // Due to a maven caching issue, accessing an artifact using the directory link (e.g
+ // https://repo1.maven.org/maven2/com/google/cloud/google-cloud-bigtable/2.23.2)
+ // results in a `404 Not Found` error even if the artifact is published but using a
+ // nested file within the directory works (e.g.
+ // https://repo1.maven.org/maven2/com/google/cloud/google-cloud-bigtable/2.23.2/google-cloud-bigtable-2.23.2.pom)
  return "https://repo1.maven.org/maven2/"
  + artifact.getGroupId().replace('.', '/')
  + "/"
  + artifact.getArtifactId()
  + "/"
  + artifact.getVersion()
- + "/";
+ + "/"
+ + artifact.getArtifactId()
+ + "-"
+ + artifact.getVersion()
+ + ".pom";
  }
 
  /** Asserts that the BOM only provides JARs which contains unique class names to the classpath. */