Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/8537#discussion_r38582751
--- Diff:
mllib/src/test/java/org/apache/spark/ml/source/JavaLibSVMRelationSuite.java ---
@@ -0,0 +1,59 @@
+package org.apache.spark.ml.source;
+
+import com.google.common.base.Charsets;
+import com.google.common.io.Files;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.mllib.linalg.Vectors;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.SQLContext;
+import org.apache.spark.util.Utils;
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.File;
+import java.io.IOException;
+
+/**
+ * Test LibSVMRelation in Java.
+ */
+public class JavaLibSVMRelationSuite {
+ private transient JavaSparkContext jsc;
+ private transient SQLContext jsql;
+ private transient DataFrame dataset;
+
+ private File path;
+
+ @Before
+ public void setUp() throws IOException {
+ jsc = new JavaSparkContext("local", "JavaLibSVMRelationSuite");
+ jsql = new SQLContext(jsc);
+
+ path = Utils.createTempDir(System.getProperty("java.io.tmpdir"),
+ "datasource").getCanonicalFile();
+ if (path.exists()) {
+ path.delete();
+ }
+
+ String s = "1 1:1.0 3:2.0 5:3.0\n0\n0 2:4.0 4:5.0 6:6.0";
+ Files.write(s, path, Charsets.US_ASCII);
+ }
+
+ @After
+ public void tearDown() {
+ jsc.stop();
+ jsc = null;
+ }
+
+ @Test
+ public void verifyLibSvmDF() {
+ dataset = jsql.read().format("libsvm").load();
+ Assert.assertEquals(dataset.columns()[0], "label");
+ Assert.assertEquals(dataset.columns()[1], "features");
+ Row r = dataset.first();
+ Assert.assertTrue(r.getDouble(0) == 1.0);
--- End diff --
use `assertEquals`
---
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