Feature/s3 jsonata support

[mikewongblinx]

No description provided.

[zirkelc]

Hey @mikewongblinx please add a test case for this.
You can chnage/extend one of the existing tests for S3.
here is an example covering both JSONPath and JSONata:

serverless-step-functions/lib/deploy/stepFunctions/compileIamRole.test.js

Lines 3380 to 3490 in ab6f6e6

	describe('should give step functions permission to * whenever StateMachineArn.$ (JSONPath) or {% $arn %} (JSONata) is seen', () => {
	it('jsonpath', () => {
	const stateMachineArn = 'arn:aws:states:us-east-1:123456789:stateMachine:HelloStateMachine';
	const genStateMachine = id => ({
	id,
	definition: {
	StartAt: 'A',
	States: {
	A: {
	Type: 'Task',
	Resource: 'arn:aws:states:::states:startExecution',
	Parameters: {
	'StateMachineArn.$': '$.arn',
	Input: {},
	},
	Next: 'B',
	},
	B: {
	Type: 'Task',
	Resource: 'arn:aws:states:::states:startExecution.sync',
	Parameters: {
	StateMachineArn: stateMachineArn,
	Input: {},
	},
	Next: 'C',
	},
	C: {
	Type: 'Task',
	Resource: 'arn:aws:states:::states:startExecution.waitForTaskToken',
	Parameters: {
	StateMachineArn: stateMachineArn,
	Input: {},
	},
	End: true,
	},
	},
	},
	});
	serverless.service.stepFunctions = {
	stateMachines: {
	myStateMachine1: genStateMachine('StateMachine1'),
	},
	};
	serverlessStepFunctions.compileIamRole();
	const statements = serverlessStepFunctions.serverless.service
	.provider.compiledCloudFormationTemplate.Resources.StateMachine1Role
	.Properties.Policies[0].PolicyDocument.Statement;
	const stateMachinePermissions = statements.filter(s => _.includes(s.Action, 'states:StartExecution'));
	expect(stateMachinePermissions).to.have.lengthOf(1);
	expect(stateMachinePermissions[0].Resource).to.equal('*');
	});
	it('jsonata', () => {
	const stateMachineArn = 'arn:aws:states:us-east-1:123456789:stateMachine:HelloStateMachine';
	const genStateMachine = id => ({
	id,
	definition: {
	QueryLanguage: 'JSONata', // JSONPath is default
	StartAt: 'A',
	States: {
	A: {
	Type: 'Task',
	Resource: 'arn:aws:states:::states:startExecution',
	Arguments: {
	StateMachineArn: '{% $arn %}',
	Input: {},
	},
	Next: 'B',
	},
	B: {
	Type: 'Task',
	Resource: 'arn:aws:states:::states:startExecution.sync',
	Arguments: {
	StateMachineArn: stateMachineArn,
	Input: {},
	},
	Next: 'C',
	},
	C: {
	Type: 'Task',
	Resource:
	'arn:aws:states:::states:startExecution.waitForTaskToken',
	Arguments: {
	StateMachineArn: stateMachineArn,
	Input: {},
	},
	End: true,
	},
	},
	},
	});
	serverless.service.stepFunctions = {
	stateMachines: {
	myStateMachine1: genStateMachine('StateMachine1'),
	},
	};
	serverlessStepFunctions.compileIamRole();
	const statements = serverlessStepFunctions.serverless.service.provider
	.compiledCloudFormationTemplate.Resources.StateMachine1Role
	.Properties.Policies[0].PolicyDocument.Statement;
	const stateMachinePermissions = statements.filter(s => _.includes(s.Action, 'states:StartExecution'));
	expect(stateMachinePermissions).to.have.lengthOf(1);
	expect(stateMachinePermissions[0].Resource).to.equal('*');
	});
	});