Duplicate method to untangle dependency

We *could* have added a helper class, but it’s a lot of boilerplate for a single, simple method.

Author: alanpaxton

java/src/test/java/org/rocksdb/SharedTempFileLoaderTest.java

@@ -29,7 +29,7 @@ static BufferedReader mockContentReader() {
     return new BufferedReader(new InputStreamReader(is));
   }
 
-  static void compare(BufferedReader expected, BufferedReader actual) throws IOException {
+  static private void compare(BufferedReader expected, BufferedReader actual) throws IOException {
     String expectedLine = expected.readLine();
     String actualLine = actual.readLine();
     while (expectedLine != null) {

java/src/test/java/org/rocksdb/SharedTempFileMockMain.java

@@ -1,7 +1,6 @@
 package org.rocksdb;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.rocksdb.SharedTempFileLoaderTest.compare;
 
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -45,4 +44,15 @@ public static void main(final String[] args) throws IOException, InterruptedExce
 
     Thread.sleep(2000);
   }
+
+  static private void compare(BufferedReader expected, BufferedReader actual) throws IOException {
+    String expectedLine = expected.readLine();
+    String actualLine = actual.readLine();
+    while (expectedLine != null) {
+      assertThat(actualLine).isEqualTo(expectedLine);
+      expectedLine = expected.readLine();
+      actualLine = actual.readLine();
+    }
+    assertThat(actualLine).isNull();
+  }
 }