SERVER-4939 test

1 files changed, 39 insertions, 0 deletions

diff --git a/jstests/repl/repl15.js b/jstests/repl/repl15.js
new file mode 100644
index 00000000000..2545ec0b9d5
--- /dev/null
+++ b/jstests/repl/repl15.js
@@ -0,0 +1,39 @@
+// Test a case were an update can grow a document on master but growth is prevented on slave.
+// SERVER-4939
+
+if ( 0 ) { // SERVER-4939
+
+function doTest( capped ) {
+
+    rt = new ReplTest( "repl15tests" );
+    master = rt.start( true );
+    if ( capped ) {
+        master.getDB( 'd' ).createCollection( 'c', { capped:true, size:5*1024 } );
+    }
+    mc = master.getDB( 'd' )[ 'c' ];
+
+    big = new Array( 1000 ).toString();
+    // Insert a document, then make it slightly smaller.
+    mc.insert( {a:big} );
+    mc.update( {}, {$set:{a:'b'}} );
+    
+    slave = rt.start( false );
+    sc = slave.getDB( 'd' )[ 'c' ];
+
+    // Slave will copy the smaller doc.
+    assert.soon( function() { return sc.count( {a:'b'} ) > 0; } );
+
+    // Update the primary doc to its original size.
+    mc.update( {}, {$set:{a:big}} );
+
+    // Wait for secondary to clone the update.
+    assert.soon( function() { return sc.count( {a:big} ) > 0; } );
+
+    rt.stop();
+
+}
+
+doTest( false );
+doTest( true );
+
+}