// Disallow $ in field names
var res;

t = db.jstest_updateh
t.drop()

t.insert( {x:1} )

res = t.update( {x:1}, {$set: {y:1}} ) // ok
assert.writeOK( res )

res = t.update( {x:1}, {$set: {$z:1}} ) // not ok
assert.writeError( res )

res = t.update( {x:1}, {$set: {'a.$b':1}} ) // not ok
assert.writeError( res )

res = t.update( {x:1}, {$inc: {$z:1}} ) // not ok
assert.writeError( res )

res = t.update( {x:1}, {$pushAll: {$z:[1,2,3]}} ) // not ok
assert.writeError( res )

//Second section
t.drop()

t.save( {_id:0, n: 0} )

// Test that '$' cannot be the first character in a field.
// SERVER-7150
res = t.update({ n: 0 }, { $set: { $x: 1 }});
assert.writeError(res);

res = t.update({ n: 0 }, { $set: { $$$: 1 }});
assert.writeError(res);

res = t.update({ n: 0 }, { $set: { "sneaky.$x": 1 }});
assert.writeError(res);

res = t.update({ n: 0 }, { $set: { "secret.agent$.$x": 1 }});
assert.writeError(res);

res = t.update({ n: 0 }, { $set: { "secret.agent$": 1 }});
assert.writeOK(res);
t.save( {_id:0, n: 0} )

// Test that you cannot update database references into top level fields
// Enable after SERVER-14252 fixed: currently validation does not catch DBRef
// fields at the top level for update and will not cause an error here
//res = t.update({ n: 0 }, { $set: {$ref: "1", $id: 1, $db: "1"}});
//assert.writeError(res);

//res = t.update({ n: 0 }, { $set: {$ref: "1", $id: 1}});
//assert.writeError(res);

// SERVER-11241: Validation used to allow any DBRef field name as a prefix
// thus allowing things like $idXXX
res = t.update({ n: 0 }, { $set: { $reffoo: 1 }});
assert.writeError(res);

res = t.update({ n: 0 }, { $set: { $idbar: 1 }});
assert.writeError(res);

res = t.update({ n: 0 }, { $set: { $dbbaz: 1 }});
assert.writeError(res);

// Test that '$id', '$db', and '$ref' are acceptable field names in
// the correct case ( subdoc)
// SERVER-3231
res = t.update({ n: 0 }, { $set: { 'x.$ref': '1', 'x.$id': 1, 'x.$db': '1' }});
assert.writeOK(res);
t.save( {_id:0, n: 0} )

// Test that '$' can occur elsewhere in a field name.
// SERVER-7557
res = t.update({n: 0 }, { $set: { ke$sha: 1 }});
assert.writeOK(res);
t.save( {_id:0, n: 0} )

res = t.update({n: 0 }, { $set: { more$$moreproblem$: 1 }});
assert.writeOK(res);
t.save( {_id:0, n: 0} )