@ribajs/core/src/parsers.spec.ts

Core module of Riba.js

import { Riba } from "./index.js";

const riba = new Riba();

describe("Parsers", () => {
  describe("parseTemplate()", () => {
    it("tokenizes a text template", () => {
      const template =
        "Hello {{ user.name }}, you have {{ user.messages.unread | length }} unread messages.";

      const expected = [
        { type: 0, value: "Hello " },
        { type: 1, value: "user.name" },
        { type: 0, value: ", you have " },
        { type: 1, value: "user.messages.unread | length" },
        { type: 0, value: " unread messages." },
      ];

      const results = riba.parseTemplate(template, ["{{", "}}"]);
      if (!results) {
        throw new Error("No result!");
      }
      expect(results).toHaveLength(5);

      for (let i = 0; i < results.length; i++) {
        if (!results[i]) {
          throw new Error("results[i] is not defined!");
        }
        expect(results[i].type).toEqual(expected[i].type);
        expect(results[i].value).toEqual(expected[i].value);
      }
    });

    describe("with no binding fragments", () => {
      it("should return undefined", () => {
        const template = "Hello World!";

        const results = riba.parseTemplate(template, ["{{", "}}"]);
        expect(results).toBeNull();
      });
    });

    describe("with only a binding fragment", () => {
      it("should return a single binding token", () => {
        const template = "{{ user.name }}";
        const expected = [{ type: 1, value: "user.name" }];

        const results = riba.parseTemplate(template, ["{{", "}}"]);
        if (!results) {
          throw new Error("No result!");
        }
        expect(results.length).toEqual(1);

        for (let i = 0; i < results.length; i++) {
          if (!results[i]) {
            throw new Error("results[i] is not defined!");
          }
          expect(results[i].type).toEqual(expected[i].type);
          expect(results[i].value).toEqual(expected[i].value);
        }
      });
    });
  });

  describe("parseType", () => {
    it("parses string primitives", () => {
      let token = riba.parseType("'TEST'");
      expect(token.type).toEqual(0);
      expect(token.value).toEqual("TEST");

      token = riba.parseType("'hello'");
      expect(token.type).toEqual(0);
      expect(token.value).toEqual("hello");

      token = riba.parseType("");
      expect(token.type).toEqual(0);
      // expect(token.value).toEqual('');
    });

    it("parses number primitives", () => {
      let token = riba.parseType("3");
      expect(token.type).toEqual(0);
      expect(token.value).toEqual(3);

      token = riba.parseType("3.14");
      expect(token.type).toEqual(0);
      expect(token.value).toEqual(3.14);
    });

    it("parses boolean primitives", () => {
      let token = riba.parseType("true");
      expect(token.type).toEqual(0);
      expect(token.value).toEqual(true);

      token = riba.parseType("false");
      expect(token.type).toEqual(0);
      expect(token.value).toEqual(false);
    });

    it("parses pathes", () => {
      let token = riba.parseType("path");
      expect(token.type).toEqual(1);
      expect(token.value).toEqual("path");

      token = riba.parseType("dotted.path");
      expect(token.type).toEqual(1);
      expect(token.value).toEqual("dotted.path");

      token = riba.parseType("3a");
      expect(token.type).toEqual(1);
      expect(token.value).toEqual("3a");
    });
  });
});