Test to check if properties set are properly propogated

hoodie-client/src/test/java/com/uber/hoodie/config/HoodieWriteConfigTest.java

@@ -0,0 +1,42 @@
+package com.uber.hoodie.config;
+
+import static org.junit.Assert.*;
+
+import com.google.common.collect.Maps;
+import com.uber.hoodie.config.HoodieWriteConfig.Builder;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Date;
+import java.util.Map;
+import java.util.Properties;
+import org.junit.Test;
+
+public class HoodieWriteConfigTest {
+  @Test
+  public void testPropertyLoading() throws IOException {
+    Builder builder = HoodieWriteConfig.newBuilder().withPath("/tmp");
+    Map<String, String> params = Maps.newHashMap();
+    params.put(HoodieCompactionConfig.MAX_COMMITS_TO_KEEP, "5");
+    params.put(HoodieCompactionConfig.MIN_COMMITS_TO_KEEP, "2");
+    ByteArrayOutputStream outStream = saveParamsIntoOutputStream(params);
+    ByteArrayInputStream inputStream = new ByteArrayInputStream(outStream.toByteArray());
+    try {
+      builder = builder.fromInputStream(inputStream);
+    } finally {
+      outStream.close();
+      inputStream.close();
+    }
+    HoodieWriteConfig config = builder.build();
+    assertEquals(config.getMaxCommitsToKeep(), 5);
+    assertEquals(config.getMinCommitsToKeep(), 2);
+}
+
+  private ByteArrayOutputStream saveParamsIntoOutputStream(Map<String, String> params) throws IOException {
+    Properties properties = new Properties();
+    properties.putAll(params);
+    ByteArrayOutputStream outStream = new ByteArrayOutputStream();
+    properties.store(outStream, "Saved on " + new Date(System.currentTimeMillis()));
+    return outStream;
+  }
+}