how to dynamically add jsonpath to a test step using groovy script

Hi, 

I have written a groovy scripts to dynamically add  Xpath assertion to a soap response teststep by writing a code like below

def testst = project.getTestSuiteAt(0).getTestCaseAt(0).getTestStepAt(0)

def assertionxpath = testst.addAssertion("XPath Match")
assertionxpath.name = xpathname
xpathdec = testRunner.testCase.getPropertyValue(xpath)
assertionxpath.setPath(getXapthcontains)
xpathValdec = testRunner.testCase.getPropertyValue(xpathValue)
assertionxpath.setExpectedContent(getXpathValuecontains)
assertionxpath.setAllowWildcards(true)
assertionxpath.setIgnoreNamespaceDifferences(true)

Similarly  for Json response, i have added  , my json resposne is {"ip": "122.15.156.74"}

def assertionJsonpath= testst.addAssertion("JsonPath Match") 

assertionJsonpath.setPath("$['ip']")

assertionJsonpath.setExpectedContent(""122.15.156.74"")

assertionJsonpath.setAllowWildcards(true)

i am getting error as below because of $ symbol in setPath. 

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: Script29.groovy: 11: illegal string body character after dollar sign; solution: either escape a literal dollar sign "\$5" or bracket the value expression "${5}" @ line 11, column 23. assertionxpath.setPath("$['ip']") ^ org.codehaus.groovy.syntax.SyntaxException: illegal string body character after dollar sign; solution: either escape a literal dollar sign "\$5" or bracket the value expression "${5}" @ line 11, column 23. at org.codehaus.groovy.antlr.AntlrParserPlugin.transformCSTIntoAST(AntlrParserPlugin.java:138) at org.codehaus.groovy.antlr.AntlrParserPlugin.parseCST(AntlrParserPlugin.java:111) at org.codehaus.groovy.control.SourceUnit.parse(SourceUnit.java:237) at org.codehaus.groovy.control.CompilationUnit$1.call(CompilationUnit.java:167) at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:931) at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:593) at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:569) at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:546) at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:298) at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:268) at groovy.lang.GroovyShell.parseClass(GroovyShell.java:694) at groovy.lang.GroovyShell.parse(GroovyShell.java:706) at groovy.lang.GroovyShell.parse(GroovyShell.java:742) at groovy.lang.GroovyShell.parse(GroovyShell.java:733) at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.recompileWithNewName(SoapUIGroovyScriptEngine.java:155) at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.compile(SoapUIGroovyScriptEngine.java:146) at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.run(SoapUIGroovyScriptEngine.java:95) at com.eviware.soapui.support.scripting.groovy.SoapUIProGroovyScriptEngineFactory$SoapUIProGroovyScriptEngine.run(SoapUIProGroovyScriptEngineFactory.java:82) at com.eviware.soapui.impl.wsdl.teststeps.WsdlGroovyScriptTestStep.run(WsdlGroovyScriptTestStep.java:156) at com.eviware.soapui.impl.wsdl.panels.teststeps.GroovyScriptStepDesktopPanel$RunAction$1.run(GroovyScriptStepDesktopPanel.java:316) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: Script29.groovy:11:23: illegal string body character after dollar sign; solution: either escape a literal dollar sign "\$5" or bracket the value expression "${5}" at org.codehaus.groovy.antlr.parser.GroovyRecognizer.requireFailed(GroovyRecognizer.java:332) at org.codehaus.groovy.antlr.parser.GroovyLexer.require(GroovyLexer.java:313) at org.codehaus.groovy.antlr.parser.GroovyLexer.mSTRING_CTOR_END(GroovyLexer.java:2333) at org.codehaus.groovy.antlr.parser.GroovyLexer.mSTRING_LITERAL(GroovyLexer.java:1997) at org.codehaus.groovy.antlr.parser.GroovyLexer.nextToken(GroovyLexer.java:478) at org.codehaus.groovy.antlr.parser.GroovyLexer$1.nextToken(GroovyLexer.java:262) at groovyjarjarantlr.TokenBuffer.fill(TokenBuffer.java:69) at groovyjarjarantlr.TokenBuffer.LA(TokenBuffer.java:80) at groovyjarjarantlr.LLkParser.LA(LLkParser.java:52) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.pathExpression(GroovyRecognizer.java:11680) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.postfixExpression(GroovyRecognizer.java:13410) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.unaryExpressionNotPlusMinus(GroovyRecognizer.java:13379) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.powerExpressionNotPlusMinus(GroovyRecognizer.java:13083) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.multiplicativeExpression(GroovyRecognizer.java:13015) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.additiveExpression(GroovyRecognizer.java:12685) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.shiftExpression(GroovyRecognizer.java:9921) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.relationalExpression(GroovyRecognizer.java:12590) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.equalityExpression(GroovyRecognizer.java:12514) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.regexExpression(GroovyRecognizer.java:12462) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.andExpression(GroovyRecognizer.java:12430) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.exclusiveOrExpression(GroovyRecognizer.java:12398) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.inclusiveOrExpression(GroovyRecognizer.java:12366) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.logicalAndExpression(GroovyRecognizer.java:12334) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.logicalOrExpression(GroovyRecognizer.java:12302) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.conditionalExpression(GroovyRecognizer.java:4956) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.assignmentExpression(GroovyRecognizer.java:8122) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.expression(GroovyRecognizer.java:10061) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.expressionStatementNoCheck(GroovyRecognizer.java:8449) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.expressionStatement(GroovyRecognizer.java:8995) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.statement(GroovyRecognizer.java:1278) at org.codehaus.groovy.antlr.parser.GroovyRecognizer.compilationUnit(GroovyRecognizer.java:760) at org.codehaus.groovy.antlr.AntlrParserPlugin.transformCSTIntoAST(AntlrParserPlugin.java:134) ... 22 more 1 error

 Solved by Self: 

I have added escape character \ before $. it works.