JS: Update ImportEquals test

Author: asgerf

javascript/ql/test/library-tests/TypeScript/ImportEquals/tests.expected

@@ -1,3 +1,4 @@
+legacyDataFlowDifference
 dataFlowModuleImports
 | ./esDefaultExport | tst.ts:1:26:1:53 | require ... xport') |
 | ./esNamedExports | tst.ts:2:18:2:44 | require ... ports') |
@@ -29,4 +30,4 @@ resolution
 | tst.ts:10:1:10:20 | new NodeFullExport() | nodeFullExport.ts:3:18:3:40 | class N ... port {} | tst.ts | NodeFullExport | nodeFullExport.ts |
 | tst.ts:11:1:11:31 | new nod ... xport() | nodeNamedExport.ts:3:27:3:50 | class N ... port {} | tst.ts | NodeNamedExport | nodeNamedExport.ts |
 taint
-| test taint config | taintSource.ts:3:27:3:47 | externa ... ource() | tst.ts:18:19:18:42 | taintSo ... edValue |
+| taintSource.ts:3:27:3:47 | externa ... ource() | tst.ts:18:19:18:42 | taintSo ... edValue |

javascript/ql/test/library-tests/TypeScript/ImportEquals/tests.ql

@@ -38,18 +38,26 @@ query predicate resolution(
   klassFile = klass.getFile().getBaseName()
 }
 
-class TaintConfig extends TaintTracking::Configuration {
-  TaintConfig() { this = "test taint config" }
-
-  override predicate isSource(DataFlow::Node node) {
+module TestConfig implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node node) {
     node = DataFlow::moduleImport("externalTaintSource").getACall()
   }
 
-  override predicate isSink(DataFlow::Node node) {
+  predicate isSink(DataFlow::Node node) {
     node = DataFlow::moduleImport("externalTaintSink").getACall().getArgument(0)
   }
 }
 
-query predicate taint(TaintConfig cfg, DataFlow::Node source, DataFlow::Node sink) {
-  cfg.hasFlow(source, sink)
+module TestFlow = TaintTracking::Global<TestConfig>;
+
+query predicate taint = TestFlow::flow/2;
+
+class LegacyConfig extends TaintTracking::Configuration {
+  LegacyConfig() { this = "LegacyConfig" }
+
+  override predicate isSource(DataFlow::Node source) { TestConfig::isSource(source) }
+
+  override predicate isSink(DataFlow::Node sink) { TestConfig::isSink(sink) }
 }
+
+import testUtilities.LegacyDataFlowDiff::DataFlowDiff<TestFlow, LegacyConfig>