KAFKA-5744; ShellTest: add tests for attempting to run nonexistent program, error return

cmccabe · ijuma · commit a4720b25a372 · 2017-08-18T11:38:45.000+01:00
Author: Colin P. Mccabe <cmccabe@confluent.io> Reviewers: Ismael Juma <ismael@juma.me.uk> Closes apache#3679 from cmccabe/KAFKA-5744
diff --git a/clients/src/test/java/org/apache/kafka/common/utils/ShellTest.java b/clients/src/test/java/org/apache/kafka/common/utils/ShellTest.java
@@ -20,7 +20,11 @@
 import org.junit.Test;
 import org.junit.rules.Timeout;
 
+import java.io.IOException;
+
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
 import static org.junit.Assume.assumeTrue;
 
 public class ShellTest {
@@ -41,4 +45,28 @@ public void testHeadDevZero() throws Exception {
         String output = Shell.execCommand("head", "-c", Integer.toString(length), "/dev/zero");
         assertEquals(length, output.length());
     }
+
+    private final static String NONEXISTENT_PATH = "/dev/a/path/that/does/not/exist/in/the/filesystem";
+
+    @Test
+    public void testAttemptToRunNonExistentProgram() throws Exception {
+        assumeTrue(!OperatingSystem.IS_WINDOWS);
+        try {
+            Shell.execCommand(NONEXISTENT_PATH);
+            fail("Expected to get an exception when trying to run a program that does not exist");
+        } catch (IOException e) {
+            assertTrue(e.getMessage().contains("No such file"));
+        }
+    }
+
+    @Test
+    public void testRunProgramWithErrorReturn() throws Exception {
+        assumeTrue(!OperatingSystem.IS_WINDOWS);
+        try {
+            Shell.execCommand("head", "-c", "0", NONEXISTENT_PATH);
+            fail("Expected to get an exception when trying to head a nonexistent file");
+        } catch (Shell.ExitCodeException e) {
+            assertTrue(e.getMessage().contains("No such file"));
+        }
+    }
 }
