/**
     * Deletes an installed artifact.
     *
     * @param artifact the artifact to delete
     * @throws PluginException if the artifact does not exist or deletion fails
     */
    public void deleteInstalledArtifact(final Artifact artifact) {
        final String fileName = artifact.getFileName();
        final Path jarPath = Paths.get(ResourceUtil.getPluginPath().toString(), fileName);
        if (!Files.exists(jarPath)) {

        PluginHelper testHelper = new PluginHelper();
        Artifact artifact = new Artifact("non-existent", "1.0.0");

        try {
            testHelper.deleteInstalledArtifact(artifact);
            fail("Expected PluginException");
        } catch (PluginException e) {
            assertTrue(e.getMessage().contains("does not exist"));
        }
    }

    @Test