eggtended-js/test/examples-test.js

A extended version of the Egg programming language from the Eloquent Javascript book.

const fs = require("fs");
const should = require("should");
const sinon = require("sinon");

const { Parser } = require("../lib/parser/parse.js");
const { Semantic } = require("../lib/parser/semantic.js");
const { Eggvm } = require("../lib/interp/eggvm.js");
const parser = new Parser();

describe("Testing programs from 'examples/' folder", () => {
  // Spy calls to 'console.log'
  beforeEach(() => {
    this.logSpy = sinon.spy(console, "log");
  });

  afterEach(() => {
    this.logSpy.restore();
  });

  // Method to test the number and values of 'logSpy' calls
  const assertOutput = outs => {
    this.logSpy.callCount.should.be.eql(outs.length);
    outs.forEach((output, index) => {
      this.logSpy
        .getCall(index)
        .calledWithExactly(output)
        .should.be.true();
    });
  };

  // Method for creating and executing the dynamic tests
  const executeTests = tests => {
    tests.forEach((outputs, file) => {
      // Path to the related .evm file
      const fileEVM = file + ".evm";

      describe(`Test for ${file}`, () => {
        // -- TEST PARSING --
        it("should be parsed correctly", () => {
          const rawData = fs.readFileSync(fileEVM);
          const expectedTree = JSON.parse(rawData);

          const tree = parser.parseFromFile(file);
          Semantic.check(tree);

          tree.should.match(expectedTree);
        });

        // -- TEST EXECUTION --
        if (Array.isArray(outputs)) {
          it("should print the expected output after execution", () => {
            // Eggvm.runFromEVM(fileEVM);
            Eggvm.runFromEVM(fileEVM);
            assertOutput(outputs);
          });
        } else {
          it(`should throw an exception of type ${outputs.name}`, () => {
            should.throws(() => {
              Eggvm.runFromEVM(fileEVM);
            }, outputs);
          });
        }
      });
    });
  };

  // Define tests
  const tests = new Map();

  tests.set("examples/one.egg", [50]);
  tests.set("examples/two.egg", [9]);
  tests.set("examples/scope.egg", [9, 8]);
  tests.set("examples/boolean.egg", ["true"]);

  tests.set("examples/string.egg", ["s"]);
  tests.set("examples/sum.egg", [395.5]);
  tests.set("examples/reto.egg", ["sum(array[1, 2, 3]) := 6"]);

  tests.set("examples/array.egg", [[1, 4], 5]);
  tests.set("examples/array-index.egg", [1, [2, 3], 3, 3, 2]);
  tests.set("examples/array-properties.egg", [1, [5, 3], 3]);

  tests.set("examples/set-error.egg", TypeError);
  tests.set("examples/set-error2.egg", TypeError);

  tests.set("examples/method3.egg", ["A-B-C"]);
  tests.set("examples/method-concatenation.egg", ["1-hello egg"]);
  tests.set("examples/property.egg", [2, 3]);

  tests.set("examples/string-apply.egg", [5, "4.00", 19]);
  tests.set("examples/operators-arithm.egg", [6, 5, 10, -5, 0, -10]);

  tests.set("examples/map.egg", [
    new Map([["x", 4], ["y", new Map([["z", 3]])]]),
    4,
    new Map([["z", 3]]),
    3,
    new Map([["z", 50]])
  ]);

  tests.set("examples/map-colon.egg", [
    new Map([["x", 4], ["y", new Map([["z", 3]])]]),
    4,
    new Map([["z", 3]]),
    3,
    new Map([["z", 50]])
  ]);

  tests.set("examples/multi-sub-set.egg", [
    1,
    new Map([["x", 2], ["y", [3, 4]]]),
    [3, 4],
    new Map([["x", 2], ["y", 5]]),
    [0, 1]
  ]);

  tests.set("examples/map-sub.egg", [1, new Map([["d", 5], ["e", 3]]), 3]);
  tests.set("examples/fun-inside-map.egg", [7, 4]);

  tests.set("examples/missing.egg", [9]);
  tests.set("examples/missing-err.egg", SyntaxError);
  tests.set("examples/objects.egg", [0, 4, 5]);
  tests.set("examples/regex.egg", [true, 0, "2015", "02"]);

  tests.set("examples/dot.egg", ["1-4-5", 5]);
  tests.set("examples/dot-obj-2.egg", [0, 0, 0, 5, 5, 5]);
  tests.set("examples/dot-num.egg", ["4.00", "4.00", "4.00"]);

  tests.set("examples/for.egg", [0, 1, 2, 3, 4]);
  tests.set("examples/foreach.egg", [1, 2, 3, "A", "B", "C"]);

  tests.set("examples/client.egg", ["inside module", 5, 5, 3]);
  tests.set("examples/ects-context.egg", [0, 4, 5]);
  tests.set("examples/child.egg", [5, 5, 5]);

  tests.set("examples/trycatch.egg", ["Caught error! 42", 20, "Finally called"]);
  tests.set("examples/trycatch-2.egg", [
    "Inner catch. Rethrowing...",
    "Outer catch. 42"
  ]);

  // Execute all the defined tests
  executeTests(tests);
});