[SYSTEMDS-3842] Improve test coverage of API components: ScriptExecutorUtils & JMLConnection

Closes #2253.

Author: e-strauss

src/main/java/org/apache/sysds/api/jmlc/Connection.java

@@ -827,19 +827,6 @@ public FrameBlock convertToFrame(InputStream input, int rows, int cols, String f
 	// Read transform meta data
 	////////////////////////////////////////////
 
-	/**
-	 * Reads transform meta data from an HDFS file path and converts it into an in-memory
-	 * FrameBlock object. The column names in the meta data file 'column.names' is processed
-	 * with default separator ','.
-	 * 
-	 * @param metapath  hdfs file path to meta data directory
-	 * @return FrameBlock object representing transform metadata
-	 * @throws IOException if IOException occurs
-	 */
-	public FrameBlock readTransformMetaDataFromFile(String metapath) throws IOException {
-		return readTransformMetaDataFromFile(null, metapath, TfUtils.TXMTD_SEP);
-	}
-	
 	/**
 	 * Reads transform meta data from an HDFS file path and converts it into an in-memory
 	 * FrameBlock object. The column names in the meta data file 'column.names' is processed

src/test/java/org/apache/sysds/test/component/misc/DMLScriptTest.java

@@ -21,18 +21,24 @@
 package org.apache.sysds.test.component.misc;
 
 
+import org.apache.commons.cli.ParseException;
 import org.apache.log4j.Level;
 import org.apache.log4j.Logger;
 import org.apache.log4j.spi.LoggingEvent;
 import org.apache.sysds.api.DMLScript;
+import org.apache.sysds.api.ScriptExecutorUtils;
+import org.apache.sysds.conf.ConfigurationManager;
 import org.apache.sysds.parser.LanguageException;
+import org.apache.sysds.runtime.controlprogram.context.ExecutionContext;
+import org.apache.sysds.runtime.controlprogram.context.ExecutionContextFactory;
 import org.apache.sysds.test.LoggingUtils;
 import org.junit.Assert;
 import org.junit.Test;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.PrintStream;
+import java.util.Arrays;
 import java.util.List;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -359,5 +365,44 @@ public void executeDMLWithScriptAndDebugTest() throws IOException {
     public void createDMLScriptInstance(){
         DMLScript script = new DMLScript();
         Assert.assertTrue(script != null);
+
+    }
+
+    @Test
+    public void testLineageScriptExecutorUtilTestTest() throws IOException {
+        // just for code coverage
+        new ScriptExecutorUtils();
+
+        String cl = "systemds -lineage estimate -s \"print('hello')\"";
+        String[] args = cl.split(" ");
+        final PrintStream originalOut = System.out;
+        try {
+            final ByteArrayOutputStream outputStreamCaptor = new ByteArrayOutputStream();
+            System.setOut(new PrintStream(outputStreamCaptor));
+            executeScript(args);
+            System.setOut(originalOut);
+            String[] lines = outputStreamCaptor.toString().split(System.lineSeparator());
+            Assert.assertTrue(lines[0].startsWith("hello"));
+            Assert.assertTrue(Arrays.stream(lines).anyMatch(s -> s.startsWith("Compute Time (Elapsed/Saved):")));
+            Assert.assertTrue(Arrays.stream(lines).anyMatch(s -> s.startsWith("Space Used (C/R/L):")));
+            Assert.assertTrue(Arrays.stream(lines).anyMatch(s -> s.startsWith("Cache Full Timestamp:")));
+        } finally {
+            System.setOut(originalOut);
+        }
+    }
+
+    @Test
+    public void testScriptExecutorUtilTestTest() throws IOException, ParseException {
+        boolean old = DMLScript.USE_ACCELERATOR;
+        DMLScript.USE_ACCELERATOR = true;
+        try {
+            ExecutionContext ec = ExecutionContextFactory.createContext();
+            ScriptExecutorUtils.executeRuntimeProgram(null, ec, ConfigurationManager.getDMLConfig(), 0, null);
+        } catch (Error e){
+            Assert.assertTrue("Expecting Message starting with \"Error while loading native library. Instead got:"
+                    + e.getMessage(), e.getMessage().startsWith("Error while loading native library"));
+        } finally {
+            DMLScript.USE_ACCELERATOR = old;
+        }
     }
 }