diff2html/src/__tests__/printer-utils-tests.js

const PrinterUtils = require("../printer-utils.js").PrinterUtils;

describe("Utils", function() {
  describe("getHtmlId", function() {
    it("should generate file unique id", function() {
      const result = PrinterUtils.getHtmlId({
        oldName: "sample.js",
        newName: "sample.js"
      });
      expect("d2h-960013").toEqual(result);
    });
    it("should generate file unique id for empty hashes", function() {
      const result = PrinterUtils.getHtmlId({
        oldName: "sample.js",
        newName: "sample.js"
      });
      expect("d2h-960013").toEqual(result);
    });
  });

  describe("getDiffName", function() {
    it("should generate the file name for a changed file", function() {
      const result = PrinterUtils.getDiffName({
        oldName: "sample.js",
        newName: "sample.js"
      });
      expect("sample.js").toEqual(result);
    });
    it("should generate the file name for a changed file and full rename", function() {
      const result = PrinterUtils.getDiffName({
        oldName: "sample1.js",
        newName: "sample2.js"
      });
      expect("sample1.js → sample2.js").toEqual(result);
    });
    it("should generate the file name for a changed file and prefix rename", function() {
      const result = PrinterUtils.getDiffName({
        oldName: "src/path/sample.js",
        newName: "source/path/sample.js"
      });
      expect("{src → source}/path/sample.js").toEqual(result);
    });
    it("should generate the file name for a changed file and suffix rename", function() {
      const result = PrinterUtils.getDiffName({
        oldName: "src/path/sample1.js",
        newName: "src/path/sample2.js"
      });
      expect("src/path/{sample1.js → sample2.js}").toEqual(result);
    });
    it("should generate the file name for a changed file and middle rename", function() {
      const result = PrinterUtils.getDiffName({
        oldName: "src/really/big/path/sample.js",
        newName: "src/small/path/sample.js"
      });
      expect("src/{really/big → small}/path/sample.js").toEqual(result);
    });
    it("should generate the file name for a deleted file", function() {
      const result = PrinterUtils.getDiffName({
        oldName: "src/my/file.js",
        newName: "/dev/null"
      });
      expect("src/my/file.js").toEqual(result);
    });
    it("should generate the file name for a new file", function() {
      const result = PrinterUtils.getDiffName({
        oldName: "/dev/null",
        newName: "src/my/file.js"
      });
      expect("src/my/file.js").toEqual(result);
    });
    it("should generate handle undefined filename", function() {
      const result = PrinterUtils.getDiffName({});
      expect("unknown/file/path").toEqual(result);
    });
  });

  describe("diffHighlight", function() {
    it("should highlight two lines", function() {
      const result = PrinterUtils.diffHighlight("-var myVar = 2;", "+var myVariable = 3;", { matching: "words" });

      expect({
        first: {
          prefix: "-",
          line: "var <del>myVar</del> = <del>2</del>;"
        },
        second: {
          prefix: "+",
          line: "var <ins>myVariable</ins> = <ins>3</ins>;"
        }
      }).toEqual(result);
    });
    it("should highlight two lines char by char", function() {
      const result = PrinterUtils.diffHighlight("-var myVar = 2;", "+var myVariable = 3;", { diffStyle: "char" });

      expect({
        first: {
          prefix: "-",
          line: "var myVar = <del>2</del>;"
        },
        second: {
          prefix: "+",
          line: "var myVar<ins>iable</ins> = <ins>3</ins>;"
        }
      }).toEqual(result);
    });
    it("should highlight combined diff lines", function() {
      const result = PrinterUtils.diffHighlight(" -var myVar = 2;", " +var myVariable = 3;", {
        diffStyle: "word",
        isCombined: true,
        matching: "words",
        matchWordsThreshold: 1.0
      });

      expect({
        first: {
          prefix: " -",
          line: 'var <del class="d2h-change">myVar</del> = <del class="d2h-change">2</del>;'
        },
        second: {
          prefix: " +",
          line: 'var <ins class="d2h-change">myVariable</ins> = <ins class="d2h-change">3</ins>;'
        }
      }).toEqual(result);
    });
  });
});