### Question:
StepDefinitionUtil { public static String simulateMatchingStepDefinition(String stepName, Argument[] arguments) { StringBuilder builder = new StringBuilder(); builder.append("^"); int lastIndex = 0; for (Argument argument : arguments) { if (argument.getOffset() > lastIndex) { builder.append(escapeRegularExpression(stepName.substring(lastIndex, argument.getOffset()))); } boolean isNumeric = StringUtils.isNotEmpty(argument.getVal()) && StringUtils.isNumeric(argument.getVal()); if (isNumeric && argument.getOffset() > 0 && stepName.charAt(argument.getOffset() - 1) == '"') { isNumeric = false; } if (isNumeric) { builder.append("(\\d+)"); } else { builder.append("([^\"]*)"); } lastIndex = argument.getOffset() + argument.getVal().length(); } if (lastIndex < stepName.length()) { builder.append(escapeRegularExpression(stepName.substring(lastIndex))); } builder.append("$"); return builder.toString(); }  static List<String> parseStepDefinitionsJson(String stepDefinitionsJson); static String extractStepDefinition(ResultsWithMatch stepOrHook, String hookName, List<String> stepDefinitions); static String simulateMatchingStepDefinition(String stepName, Argument[] arguments);  }### Answer:
@Test public void testSimulateMatchingStepDefinition() { String stepName = "A step number 1 that fails with error \"string parameter 1\""; Argument[] arguments = { new Argument("1", 14), new Argument("string parameter 1", 39) }; String simulatedStepDefinition = StepDefinitionUtil.simulateMatchingStepDefinition(stepName, arguments); assertThat(simulatedStepDefinition).isEqualTo("^A step number (\\d+) that fails with error \"([^\"]*)\"$"); }
@Test public void testArgumentAtStart() { String stepName = "A1"; Argument[] arguments = { new Argument("1", 1) }; String simulatedStepDefinition = StepDefinitionUtil.simulateMatchingStepDefinition(stepName, arguments); assertThat(simulatedStepDefinition).isEqualTo("^A(\\d+)$"); }
@Test public void testArgumentAtEnd() { String stepName = "1A"; Argument[] arguments = { new Argument("1", 0) }; String simulatedStepDefinition = StepDefinitionUtil.simulateMatchingStepDefinition(stepName, arguments); assertThat(simulatedStepDefinition).isEqualTo("^(\\d+)A$"); }
@Test public void testIntegerArgumentAsString() { String stepName = "A\"1\"B"; Argument[] arguments = { new Argument("1", 2) }; String simulatedStepDefinition = StepDefinitionUtil.simulateMatchingStepDefinition(stepName, arguments); assertThat(simulatedStepDefinition).isEqualTo("^A\"([^\"]*)\"B$"); }
@Test public void testNoArgument() { String simulatedStepDefinition = StepDefinitionUtil.simulateMatchingStepDefinition("abc", new Argument[0]); assertThat(simulatedStepDefinition).isEqualTo("^abc$"); }
@Test public void testSpecialCharacters() { String original = "Test <([{\\^-=$!|]})?*+.>"; String replaced = "Test " + "\\<" + "\\(" + "\\[" + "\\{" + "\\\\" + "\\^" + "\\-" + "\\=" + "\\$" + "\\!" + "\\|" + "\\]" + "\\}" + "\\)" + "\\?" + "\\*" + "\\+" + "\\." + "\\>"; assertThat(StepDefinitionUtil.simulateMatchingStepDefinition(original, new Argument[0])).isEqualTo("^" + replaced + "$"); }