added InlineExpectationsTest query

Author: chanel-y

powershell/ql/lib/utils/test/InlineExpectationsTest.qll

@@ -0,0 +1,8 @@
+/**
+ * Inline expectation tests for Powershell.
+ * See `shared/util/codeql/util/test/InlineExpectationsTest.qll`
+ */
+
+private import codeql.util.test.InlineExpectationsTest
+private import internal.InlineExpectationsTestImpl
+import Make<Impl>

powershell/ql/lib/utils/test/InlineExpectationsTestQuery.ql

@@ -0,0 +1,21 @@
+/**
+ * @kind test-postprocess
+ */
+
+private import powershell
+private import codeql.util.test.InlineExpectationsTest as T
+private import internal.InlineExpectationsTestImpl
+import T::TestPostProcessing
+import T::TestPostProcessing::Make<Impl, Input>
+
+private module Input implements T::TestPostProcessing::InputSig<Impl> {
+  string getRelativeUrl(Location location) {
+    exists(File f, int startline, int startcolumn, int endline, int endcolumn |
+      location.hasLocationInfo(_, startline, startcolumn, endline, endcolumn) and
+      f = location.getFile()
+    |
+      result =
+        f.getRelativePath() + ":" + startline + ":" + startcolumn + ":" + endline + ":" + endcolumn
+    )
+  }
+}

powershell/ql/lib/utils/test/internal/InlineExpectationsTestImpl.qll

@@ -0,0 +1,13 @@
+private import powershell as P
+private import codeql.util.test.InlineExpectationsTest
+
+module Impl implements InlineExpectationsTestSig {
+  /**
+   * A class representing line comments in Powershell.
+   */
+  class ExpectationComment extends P::SingleLineComment {
+    string getContents() { result = this.getCommentContents().getValue().suffix(1) }
+  }
+
+  class Location = P::Location;
+}