Add test for analysis barrier.

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala

@@ -441,4 +441,17 @@ class AnalysisSuite extends AnalysisTest with ShouldMatchers {
 
     checkAnalysis(SubqueryAlias("tbl", testRelation).as("tbl2"), testRelation)
   }
+
+  test("analysis barrier") {
+    // [[AnalysisBarrier]] will be removed after analysis
+    checkAnalysis(
+      Project(Seq(UnresolvedAttribute("tbl.a")),
+        AnalysisBarrier(SubqueryAlias("tbl", testRelation))),
+      Project(testRelation.output, testRelation))
+
+    // Make sure we won't resolve the plans wrapped in an [[AnalysisBarrier]]
+    val barrier = AnalysisBarrier(Project(Seq(UnresolvedAttribute("tbl.b")),
+      SubqueryAlias("tbl", testRelation)))
+    assertAnalysisError(barrier, Seq("cannot resolve '`tbl.b`'"))
+  }
 }