test.js

import { buildExpression, calculateAst, drawAst} from "./calc.js";

const expressions = [
  ["1 + 1", 2],
  ["1 - 1", 0],
  ["1 * 0", 0],
  ["2 / 2", 1],
  ["(1)", 1],
  ["-1 + 1", 0],
  ["1.1 - 1.1", 0],
  ["1 / 2 + 1 / 2", 1],
  ["2 * 2 / 2 + 2", 4],
  ["(2 + 1) * 2 - 6", 0],
  ["2 * (2 - 1) * 2 - 4", 0],
  ["2 * ((2 - 1) + 2)", 6],
  ["1 + 2 * 3 * ((4 - 5) + 6) * 7 * 8 + 9", 1690],
  ["((2 + 1)) + 1", 4],
  ["++0", 1],
  ["--0", -1],
  ["--0 + 1", 0],
  ["6 - -6", 12],
  ["1 - --0", 2],
  ["1 - ++0", 0],
  ["--(1)", 0],
  ["--(1)", 0],
  ["---1", -2],
  ["---1 - 1", -3],
  ["---1 - --1", -2],
  ["---1 - ---1", 0],
  ["++(- - -6- - - -6)", 1],
]

function main(expressions) {
  for (const [expression, expectedResult] of expressions) {
    const ast = buildExpression(expression);
    const result = calculateAst(ast);
    if (result == expectedResult) {
      console.log("✅", expression, "=", result);
    } else {
      console.log("❌", "Failed to calculate:", expression);
      console.log("\t", "Expected:", expectedResult);
      console.log("\t", "Actual:", result);
      drawAst(ast);
    }
  }
}

main(expressions);