FrontendUtils { static String parseVersionString(String output) throws IOException { Optional<String> lastOuput = Stream.of(output.split("\n")) .filter(line -> !line.matches("^[ ]*$")) .reduce((first, second) -> second); return lastOuput.map(line -> line.replaceFirst("^v", "")) .orElseThrow(() -> new IOException("No output")); } private  FrontendUtils(); static String getOsName(); static boolean isWindows(); static String streamToString(InputStream inputStream); static ProcessBuilder createProcessBuilder(List<String> command); static String getStatsContent(VaadinService service); static String getIndexHtmlContent(VaadinService service); static String getStatsHash(VaadinService service); static String getStatsAssetsByChunkName(VaadinService service); static String getProjectFrontendDir(
            DeploymentConfiguration configuration); static boolean isWebpackConfigFile(File file); static String getUnixRelativePath(Path source, Path target); static String getUnixPath(Path source); static FallbackChunk readFallbackChunk(JsonObject object); static FrontendVersion parseFrontendVersion(String versionString); static File getVaadinHomeDirectory(); static String commandToString(String baseDir, List<String> command); @SuppressWarnings("squid:S106") static void console(String format, Object message); static final String PROJECT_BASEDIR; static final String DEFAULT_NODE_DIR; static final String NODE_MODULES; static final String FRONTEND; static final String DEFAULT_FRONTEND_DIR; static final String WEBPACK_CONFIG; static final String WEBPACK_GENERATED; static final String TARGET; static final String FLOW_NPM_PACKAGE_NAME; static final String FORM_NPM_PACKAGE_NAME; static final String DEFAULT_FLOW_RESOURCES_FOLDER; @Deprecated
    static final String DEAULT_FLOW_RESOURCES_FOLDER; static final String DEFAULT_GENERATED_DIR; static final String IMPORTS_NAME; static final String IMPORTS_D_TS_NAME; static final String INDEX_HTML; static final String INDEX_TS; static final String INDEX_JS; static final String DEFAULT_CONNECT_JAVA_SOURCE_FOLDER; static final String DEFAULT_CONNECT_APPLICATION_PROPERTIES; static final String DEFAULT_CONNECT_OPENAPI_JSON_FILE; static final String DEFAULT_CONNECT_GENERATED_TS_DIR; static final String FALLBACK_IMPORTS_NAME; static final String PARAM_GENERATED_DIR; static final String PARAM_FRONTEND_DIR; static final String PARAM_IGNORE_VERSION_CHECKS; static final String WEBPACK_PREFIX_ALIAS; static final String TOKEN_FILE; static final String CHUNKS; static final String FALLBACK; static final String EXPORT_CHUNK; static final String CSS_IMPORTS; static final String JS_MODULES; static final String PARAM_TOKEN_FILE; static final String INSTALL_NODE_LOCALLY; static final String DISABLE_CHECK; static final String YELLOW; static final String RED; static final String GREEN; static final String BRIGHT_BLUE; }
@Test public void parseValidToolVersions() throws IOException { Assert.assertEquals("10.11.12", FrontendUtils.parseVersionString("v10.11.12")); Assert.assertEquals("8.0.0", FrontendUtils.parseVersionString("v8.0.0")); Assert.assertEquals("8.0.0", FrontendUtils.parseVersionString("8.0.0")); Assert.assertEquals("6.9.0", FrontendUtils.parseVersionString( "Aktive Codepage: 1252\n" + "6.9.0\n" + "")); }
@Test(expected = IOException.class) public void parseEmptyToolVersions() throws IOException { FrontendUtils.parseVersionString(" \n"); }