[SPARK-15929] Fix portability of DataFrameSuite path globbing tests

The DataFrameSuite regression tests for SPARK-13774 fail in my environment because they attempt to glob over all of `/mnt` and some of the subdirectories restrictive permissions which cause the test to fail.

This patch rewrites those tests to remove all environment-specific assumptions; the tests now create their own unique temporary paths for use in the tests.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #13649 from JoshRosen/SPARK-15929.

sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala

@@ -19,6 +19,7 @@ package org.apache.spark.sql
 
 import java.io.File
 import java.nio.charset.StandardCharsets
+import java.util.UUID
 
 import scala.language.postfixOps
 import scala.util.Random
@@ -35,6 +36,7 @@ import org.apache.spark.sql.internal.SQLConf
 import org.apache.spark.sql.test.{ExamplePoint, ExamplePointUDT, SharedSQLContext}
 import org.apache.spark.sql.test.SQLTestData.TestData2
 import org.apache.spark.sql.types._
+import org.apache.spark.util.Utils
 
 class DataFrameSuite extends QueryTest with SharedSQLContext {
   import testImplicits._
@@ -1495,18 +1497,43 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
   }
 
   test("SPARK-13774: Check error message for non existent path without globbed paths") {
-    val e = intercept[AnalysisException] (spark.read.format("csv").
-      load("/xyz/file2", "/xyz/file21", "/abc/files555", "a")).getMessage()
-    assert(e.startsWith("Path does not exist"))
+    val uuid = UUID.randomUUID().toString
+    val baseDir = Utils.createTempDir()
+    try {
+      val e = intercept[AnalysisException] {
+        spark.read.format("csv").load(
+          new File(baseDir, "file").getAbsolutePath,
+          new File(baseDir, "file2").getAbsolutePath,
+          new File(uuid, "file3").getAbsolutePath,
+          uuid).rdd
+      }
+      assert(e.getMessage.startsWith("Path does not exist"))
+    } finally {
+
+    }
+
    }
 
   test("SPARK-13774: Check error message for not existent globbed paths") {
-    val e = intercept[AnalysisException] (spark.read.format("text").
-      load( "/xyz/*")).getMessage()
-    assert(e.startsWith("Path does not exist"))
+    // Non-existent initial path component:
+    val nonExistentBasePath = "/" + UUID.randomUUID().toString
+    assert(!new File(nonExistentBasePath).exists())
+    val e = intercept[AnalysisException] {
+      spark.read.format("text").load(s"$nonExistentBasePath/*")
+    }
+    assert(e.getMessage.startsWith("Path does not exist"))
 
-    val e1 = intercept[AnalysisException] (spark.read.json("/mnt/*/*-xyz.json").rdd).
-      getMessage()
-    assert(e1.startsWith("Path does not exist"))
+    // Existent initial path component, but no matching files:
+    val baseDir = Utils.createTempDir()
+    val childDir = Utils.createTempDir(baseDir.getAbsolutePath)
+    assert(childDir.exists())
+    try {
+      val e1 = intercept[AnalysisException] {
+        spark.read.json(s"${baseDir.getAbsolutePath}/*/*-xyz.json").rdd
+      }
+      assert(e1.getMessage.startsWith("Path does not exist"))
+    } finally {
+      Utils.deleteRecursively(baseDir)
+    }
   }
 }