assertTrue(DefaultMirrorSelector.matchPattern(getRepo("a"), "a,"));

        assertFalse(DefaultMirrorSelector.matchPattern(getRepo("b"), "a"));
        assertFalse(DefaultMirrorSelector.matchPattern(getRepo("b"), "a,"));
        assertFalse(DefaultMirrorSelector.matchPattern(getRepo("b"), ",a"));
        assertFalse(DefaultMirrorSelector.matchPattern(getRepo("b"), ",a,"));

                    return mirror;
                }
            }

            for (Mirror mirror : mirrors) {
                if (matchPattern(repository, mirror.getMirrorOf()) && matchesLayout(repository, mirror)) {
                    return mirror;
                }
            }
        }

        return null;
    }

    /**

        ArtifactRepository repository = new DefaultArtifactRepository("snapshots.repo", "http://whatever", null);
        String pattern = "external:*, !snapshots.repo";
        assertFalse(DefaultMirrorSelector.matchPattern(repository, pattern));
    }

                    return mirror;
                }
            }

            for (Mirror mirror : mirrors) {
                if (matchPattern(repository, mirror.getMirrorOf()) && matchesLayout(repository, mirror)) {
                    return mirror;
                }
            }
        }

        return null;
    }

    /**