import javascript

module TestConfig implements DataFlow::ConfigSig {

predicate isSource(DataFlow::Node source) {

source.asExpr().getStringValue() = "source" or

source.(DataFlow::CallNode).getCalleeName() = "source"

}

predicate isSink(DataFlow::Node sink) {

sink = any(DataFlow::CallNode call | call.getCalleeName() = "sink").getAnArgument()

}

}

module TestFlow = DataFlow::Global<TestConfig>;

deprecated class LegacyConfig extends DataFlow::Configuration {

LegacyConfig() { this = "LegacyConfig" }

override predicate isSource(DataFlow::Node source) { TestConfig::isSource(source) }

override predicate isSink(DataFlow::Node sink) { TestConfig::isSink(sink) }

}

deprecated import utils.test.LegacyDataFlowDiff::DataFlowDiff<TestFlow, LegacyConfig>

query predicate flow = TestFlow::flow/2;