assertEquals("(a == b)" , ctx.mapFunction("equal","a","b"));
assertEquals("(a != b)" , ctx.mapFunction("notEqual","a","b"));
assertEquals("(a < b)" , ctx.mapFunction("lessThan","a","b"));
assertEquals("(a <= b)" , ctx.mapFunction("lessOrEqual","a","b"));
assertEquals("(a > b)" , ctx.mapFunction("greaterThan","a","b"));
assertEquals("(a >= b)" , ctx.mapFunction("greaterOrEqual","a","b"));
assertEquals("(a.contains(b))" , ctx.mapFunction("isIn","a","b"));
assertEquals("((! a.contains(b)))" , ctx.mapFunction("isNotIn","a","b"));
assertEquals("(( ! a ))" , ctx.mapFunction("not","a"));
assertEquals("(a && b && c)" , ctx.mapFunction("and","a","b","c"));