ayushtkn commented on code in PR #408:
URL: https://github.com/apache/tez/pull/408#discussion_r2306937921


##########
tez-common/src/test/java/org/apache/tez/common/TestTezUtils.java:
##########
@@ -291,4 +301,30 @@ public void testPopulateConfProtoFromEntries() {
       assertEquals(confBuilder.getConfKeyValuesList().size(), 1);
   }
 
+  @Test(timeout = 5000)
+  public void testReadTezConfigurationXmlFromClasspath() throws IOException {
+    InputStream is = 
ClassLoader.getSystemResourceAsStream(TezConfiguration.TEZ_SITE_XML);
+    Configuration conf = TezUtilsInternal.readTezConfigurationXml(is);
+    assertEquals(conf.get("tez.lib.uris"), "tez.tar.gz");
+  }
+
+  @Test(timeout = 5000)
+  public void testPluginsDescriptorFromJSON() throws IOException {
+    InputStream is = 
ClassLoader.getSystemResourceAsStream(TezConstants.SERVICE_PLUGINS_DESCRIPTOR_JSON);
+    ServicePluginsDescriptor spd = 
TezClientUtils.createPluginsDescriptorFromJSON(is);
+    TaskSchedulerDescriptor tsd = spd.getTaskSchedulerDescriptors()[0];
+    ContainerLauncherDescriptor cld = spd.getContainerLauncherDescriptors()[0];
+    TaskCommunicatorDescriptor tcd = spd.getTaskCommunicatorDescriptors()[0];
+
+    assertFalse(spd.areContainersEnabled());
+    assertTrue(spd.isUberEnabled());
+    assertEquals(tsd.getClassName(), "testScheduler0_class");
+    assertEquals(tsd.getEntityName(), "testScheduler0");
+    assertEquals(cld.getClassName(), "testLauncher0_class");
+    assertEquals(cld.getEntityName(), "testLauncher0");
+    assertEquals(tcd.getClassName(), "testComm0_class");
+    assertEquals(tcd.getEntityName(), "testComm0");
+    assertEquals(tcd.getUserPayload().getVersion(), 1);
+    assertArrayEquals(tcd.getUserPayload().deepCopyAsArray(), new byte[] {0, 
0, 0, 1});

Review Comment:
    can you check the order of arguments in assertEquals, the expected in first 
argument actual is second, I think it is opposite here



##########
tez-common/src/main/java/org/apache/tez/common/TezUtilsInternal.java:
##########
@@ -74,14 +78,36 @@ public final class TezUtilsInternal {
 
   private TezUtilsInternal() {}
 
-  public static ConfigurationProto readUserSpecifiedTezConfiguration(String 
baseDir) throws
-      IOException {
+  public static ConfigurationProto readUserSpecifiedTezConfiguration(String 
baseDir) throws IOException {
     File confPBFile = new File(baseDir, TezConstants.TEZ_PB_BINARY_CONF_NAME);
     try (FileInputStream fis = new FileInputStream(confPBFile)) {
       return ConfigurationProto.parseFrom(fis);
     }
   }
 
+  public static Configuration readTezConfigurationXml(InputStream is) throws 
IOException {

Review Comment:
   this doesn't throw IOE



##########
tez-common/src/main/java/org/apache/tez/common/TezUtilsInternal.java:
##########
@@ -74,14 +78,36 @@ public final class TezUtilsInternal {
 
   private TezUtilsInternal() {}
 
-  public static ConfigurationProto readUserSpecifiedTezConfiguration(String 
baseDir) throws
-      IOException {
+  public static ConfigurationProto readUserSpecifiedTezConfiguration(String 
baseDir) throws IOException {
     File confPBFile = new File(baseDir, TezConstants.TEZ_PB_BINARY_CONF_NAME);
     try (FileInputStream fis = new FileInputStream(confPBFile)) {
       return ConfigurationProto.parseFrom(fis);
     }
   }
 
+  public static Configuration readTezConfigurationXml(InputStream is) throws 
IOException {
+    Configuration configuration = new Configuration();
+    if (is != null) {
+      configuration.addResource(is);
+    }
+    return configuration;
+  }
+
+  public static ConfigurationProto loadConfProtoFromText() throws IOException {

Review Comment:
   which method call this? this shows as unused. Removing it doesn't make any 
test fail either



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