added MEMBEREXPRESSION to massWeight
test: call instance method without value
modified callExpression condition
added memberExpression condition
test call instance method with value
test: call instance property
test while statement without condition
added WHILESTATEMENT to massweight and whileStatement condition
test: while loop with condition
added BINARYEXPRESSION to mass.weight and binaryExpression condition
test assignment expression
implemented ASSIGNMENT EXPRESSION to massWeight and condition
test assignment expression with binary expression
test call expression and binary expression
test conditon
implemented condition if statement
test condition with binary expression
renaming tests