@carrotsearch/gatsby-transformer-html/src/replace-variables.test.js

A Gatsby transformer plugin for authoring content in HTML. Supports ToC generation, responsive images, section anchors and HighlightJS code highlighting.

const {
  replaceVariables,
  validateVariables,
  createMapReplacer
} = require("./replace-variables.js");
require("must/register");

describe("validateVariables", function () {
  it("must not allow special characters in variable names", function () {
    let exception;
    try {
      validateVariables({
        NAME_OK: "",
        "$NOT_OK$": "",
        SPECIAL$: ""
      });
    } catch (e) {
      exception = e;
    }

    exception.must.not.be.undefined();
    exception.must.contain("$NOT_OK$");
    exception.must.contain("SPECIAL");
    exception.must.not.contain("NAME_OK");
  });
});

describe("replaceVariables", function () {
  it("must make individual replacements", function () {
    const input = "Something $to_replace$";
    const replaced = replaceVariables(
      input,
      createMapReplacer({
        to_replace: "to replace"
      })
    );

    replaced.must.be.equal("Something to replace");
  });

  it("must make multiple replacements", function () {
    const input = "$sth$ $to_replace$$00$with$00$$sth$";
    const replaced = replaceVariables(
      input,
      createMapReplacer({
        sth: "something",
        to_replace: "to replace",
        "00": " "
      })
    );

    replaced.must.be.equal("something to replace with something");
  });
});