PS: Add an inline expectations test library for flow sources.

Author: MathiasVP

powershell/ql/test/TestUtilities/InlineFlowSourceTest.qll

@@ -0,0 +1,29 @@
+/**
+ * Inline flow source tests for Powershell.
+ */
+
+import powershell
+private import codeql.util.test.InlineExpectationsTest
+private import internal.InlineExpectationsTestImpl
+private import semmle.code.powershell.dataflow.flowsources.FlowSources
+import Make<Impl>
+
+module InlineFlowSourceTest implements TestSig {
+  string getARelevantTag() { result = "type" }
+
+  bindingset[s]
+  private string quote(string s) {
+    if s.matches("% %") then result = "\"" + s + "\"" else result = s
+  }
+
+  predicate hasActualResult(Location location, string element, string tag, string value) {
+    exists(SourceNode sourceNode |
+      sourceNode.getLocation() = location and
+      tag = "type" and
+      quote(sourceNode.getSourceType()) = value and
+      element = sourceNode.toString()
+    )
+  }
+}
+
+import MakeTest<InlineFlowSourceTest>