I have a pretty simple snap that takes an input payload and performs an operation the payload, starting at a node specified using a “mapping root” property exactly like the Mapper snap. The snap works fine when testing it manually in the UI.
I am trying to use JTest to create unit tests for this snap but when I specify the value for the mapping root in the properties file, the code is getting the literal string instead of the Map<String, Object> of the node specified.
My property file looks like this:
{
"settings": {
"mappingRoot": {
"value": "$field2"
}
}
}
In my custom snap, my defineProperties() method does this:
propertyBuilder.describe(MAPPING_ROOT_PROPERTY, MAPPING_ROOT_LABEL, MAPPING_ROOT_DESCRIPTION)
.type(SnapType.STRING)
.expression(SnapProperty.DecoratorType.OFFERS_SCHEMA)
.expression(SnapProperty.DecoratorType.ACCEPTS_SCHEMA)
.expression(SnapProperty.DecoratorType.ENABLED_EXPRESSION)
.required()
.defaultValue(MAPPING_ROOT_DEFAULT_VALUE)
.add();
My configure() method does this (mappingRootProperty is of type ExpressionProperty):
mappingRootProperty = propertyValues.getAsExpression(MAPPING_ROOT_PROPERTY);
And my process() method does this (mappingRoot is of type Object):
mappingRoot = mappingRootProperty.eval(document);
When run in the UI, mapping root is a Map<String, Object> containing the subtree of the payload assigned to field2. In JTest, mappingRoot is the String “$field2”.
What am I doing wrong? Is this a limitation of the JTest framework?
