}
        };

        try {
            errorHelper.getAvailableArtifacts(ArtifactType.DATA_STORE);
            fail("Expected PluginException");
        } catch (PluginException e) {
            assertTrue(e.getMessage().contains("Failed to access"));
        }
    }

    public void test_getInstalledArtifacts_unknown() {

     * @return an array of available artifacts
     * @throws PluginException if failed to access the artifact repository
     */
    public Artifact[] getAvailableArtifacts(final ArtifactType artifactType) {
        try {
            return availableArtifacts.get(artifactType);
        } catch (final Exception e) {
            throw new PluginException("Failed to access " + artifactType, e);
        }
    }

    /**