jstoxml/test.js

Converts JavaScript/JSON to XML (for RSS, Podcasts, AMP, etc.)

const { toXML } = require("./dist/jstoxml");
const assert = require("assert");

describe("toXML", () => {
  describe("primitives", () => {
    const vals = ["foo", false, true, 4, 4.56];

    vals.forEach((val) => {
      it(`outputs ${val}`, () => {
        const result = toXML(val);
        const expectedResult = `${val}`;
        assert.equal(result, expectedResult);
      });
    });
  });

  describe("functions", () => {
    describe("primitive outputs", () => {
      const vals = [999, "foo", false, true];

      vals.forEach((val) => {
        it(`${val}`, () => {
          const result = toXML(() => val);
          const expectedResult = `${val}`;
          assert.equal(result, expectedResult);
        });
      });
    });

    it("fat arrow", () => {
      const val = 888;
      const result = toXML(() => val);
      const expectedResult = val;
      assert.equal(result, expectedResult);
    });

    it("accessing config within function", () => {
      const val = {
        foo: {
          depth: (config) => config.depth,
        },
      };
      const result = toXML(val);
      const expectedResult = "<foo><depth>2</depth></foo>";
      assert.equal(result, expectedResult);
    });

    it("converts nonprimitive output", () => {
      const val = { foo: "bar" };
      const result = toXML(() => val);
      const expectedResult = "<foo>bar</foo>";
      assert.equal(result, expectedResult);
    });

    it("converts nested nonprimitive output", () => {
      const val = { foo: { bar: { baz: 2 } } };
      const result = toXML(() => val);
      const expectedResult = "<foo><bar><baz>2</baz></bar></foo>";
      assert.equal(result, expectedResult);
    });

    it("converts nested nonprimitive output with indent", () => {
      const val = { foo: { bar: { baz: 2 } } };
      const config = { indent: "  " };
      const result = toXML(() => val, config);
      const expectedResult =
        "<foo>\n  <bar>\n    <baz>2</baz>\n  </bar>\n</foo>";
      assert.equal(result, expectedResult);
    });
  });

  describe("github issues", () => {
    it("issue 3", () => {
      const val = {
        foo: true,
        bar: "",
        foo2: false,
        ok: "This is ok",
        ok2: "false",
        ok3: "true",
      };
      const result = toXML(val);
      const expectedResult =
        "<foo>true</foo><bar/><foo2>false</foo2><ok>This is ok</ok><ok2>false</ok2><ok3>true</ok3>";
      assert.equal(result, expectedResult);
    });
  });

  describe("arrays", () => {
    it("1", () => {
      const val = [{ foo: "bar" }, { foo: "baz" }, { foo2: "bar2" }];
      const result = toXML(val);
      const expectedResult = "<foo>bar</foo><foo>baz</foo><foo2>bar2</foo2>";
      assert.equal(result, expectedResult);
    });

    it("attributes in subobject", () => {
      const val = [
        { foo: "bar" },
        { foo: "baz" },
        { foo: undefined },
        { foo: "" },
        { foo: null },
        {
          _name: "foo",
          _content: "bar",
          _attrs: {
            a: "b",
            c: "d",
          },
        },
      ];
      const result = toXML(val);
      const expectedResult =
        '<foo>bar</foo><foo>baz</foo><foo/><foo/>foo<foo a="b" c="d">bar</foo>';
      assert.equal(result, expectedResult);
    });

    it("nesting with indent", () => {
      const val = {
        foo: [{ foo: "bar" }, { foo: "baz" }, { foo2: "bar2" }],
      };
      const config = { indent: "  " };
      const result = toXML(val, config);
      const expectedResult = `<foo>
  <foo>bar</foo>
  <foo>baz</foo>
  <foo2>bar2</foo2>
</foo>`;
      assert.equal(result, expectedResult);
    });
  });

  describe("special-objects", () => {
    it("1", () => {
      const val = {
        _name: "foo",
        _content: "bar",
        _attrs: {
          a: 1,
          b: 2,
        },
      };
      const result = toXML(val);
      const expectedResult = '<foo a="1" b="2">bar</foo>';
      assert.equal(result, expectedResult);
    });

    it("2", () => {
      const val = {
        _name: "foo",
        _content: {
          foo: "bar",
        },
        _attrs: {
          a: 1,
          b: 2,
        },
      };
      const result = toXML(val);
      const expectedResult = '<foo a="1" b="2"><foo>bar</foo></foo>';
      assert.equal(result, expectedResult);
    });

    it("3", () => {
      const val = {
        _name: "foo",
        _content: () => 1 + 2,
        _attrs: {
          a: 1,
          b: 2,
        },
      };
      const result = toXML(val);
      const expectedResult = '<foo a="1" b="2">3</foo>';
      assert.equal(result, expectedResult);
    });
  });

  describe("objects", () => {
    it("1", () => {
      const val = {
        foo: "bar",
        foo2: "bar2",
      };
      const result = toXML(val);
      const expectedResult = "<foo>bar</foo><foo2>bar2</foo2>";
      assert.equal(result, expectedResult);
    });

    it("attributes", () => {
      const val = {
        _name: "a",
        _attrs: {
          foo: "bar",
          foo2: "bar2",
        },
      };
      const result = toXML(val);
      const expectedResult = '<a foo="bar" foo2="bar2"/>';
      assert.equal(result, expectedResult);
    });

    it("attributes 2", () => {
      const val = {
        _name: "a",
        _attrs: {
          foo: "bar",
          foo2: "bar2",
        },
        _content: "la dee da",
      };
      const result = toXML(val);
      const expectedResult = '<a foo="bar" foo2="bar2">la dee da</a>';
      assert.equal(result, expectedResult);
    });

    it("attributes nesting", () => {
      const val = {
        _name: "foo",
        _attrs: {
          a: "b",
        },
        _content: {
          _name: "bar",
          _attrs: {
            c: "d",
          },
        },
      };
      const result = toXML(val);
      const expectedResult = '<foo a="b"><bar c="d"/></foo>';
      assert.equal(result, expectedResult);
    });
    it("with mixed content", () => {
      const val = {
        blah: null,
        foo: "bar",
        "more blah": null,
        bar: 0,
        "more more blah": null,
        baz: false,
      };
      const result = toXML(val);
      const expectedResult =
        "blah<foo>bar</foo>more blah<bar>0</bar>more more blah<baz>false</baz>";
      assert.equal(result, expectedResult);
    });

    it("nesting with indent", () => {
      const val = {
        foo: {
          foo: "bar",
          foo2: "bar2",
        },
      };
      const config = { indent: "  " };
      const result = toXML(val, config);
      const expectedResult = `<foo>
  <foo>bar</foo>
  <foo2>bar2</foo2>
</foo>`;
      assert.equal(result, expectedResult);
    });

    it("deep nesting", () => {
      const val = {
        a: {
          b: {
            c: {
              d: {
                e: {
                  f: {
                    g: {
                      h: {
                        i: {
                          j: {
                            k: {
                              l: {
                                m: {
                                  foo: "bar",
                                },
                              },
                            },
                          },
                        },
                      },
                    },
                  },
                },
              },
            },
          },
        },
      };
      const result = toXML(val);
      const expectedResult =
        "<a><b><c><d><e><f><g><h><i><j><k><l><m><foo>bar</foo></m></l></k></j></i></h></g></f></e></d></c></b></a>";
      assert.equal(result, expectedResult);
    });
  });

  describe("header", () => {
    it("default header", () => {
      const val = {
        foo: "bar",
      };
      const config = {
        header: true,
      };
      const result = toXML(val, config);
      const expectedResult =
        '<?xml version="1.0" encoding="UTF-8"?><foo>bar</foo>';
      assert.equal(result, expectedResult);
    });

    it("no header", () => {
      const val = {
        foo: "bar",
      };
      const config = {
        header: false,
      };
      const result = toXML(val, config);
      const expectedResult = "<foo>bar</foo>";
      assert.equal(result, expectedResult);
    });

    it("no header by default", () => {
      const val = {
        foo: "bar",
      };
      const result = toXML(val);
      const expectedResult = "<foo>bar</foo>";
      assert.equal(result, expectedResult);
    });

    it("default header with indent", () => {
      const val = {
        foo: "bar",
      };
      const config = {
        header: true,
        indent: "  ",
      };
      const result = toXML(val, config);
      const expectedResult =
        '<?xml version="1.0" encoding="UTF-8"?>\n<foo>bar</foo>';
      assert.equal(result, expectedResult);
    });

    it("custom header", () => {
      const val = {
        foo: "bar",
      };
      const config = {
        header: '<?FOO BAR="123" BAZ="XX"?>',
      };
      const result = toXML(val, config);
      const expectedResult = '<?FOO BAR="123" BAZ="XX"?><foo>bar</foo>';
      assert.equal(result, expectedResult);
    });

    it("custom header 2", () => {
      const val = [
        {
          row: 'bar'
        },
        {
          row: 'bar2'
        }
      ];
      const config = {
        header: '<?xml version="1.0" encoding="UTF-16" standalone="yes"?>',
        indent: ' '
      };

      const result = toXML(val, config);

      const expectedResult = `<?xml version="1.0" encoding="UTF-16" standalone="yes"?>
<row>bar</row>
<row>bar2</row>`;
      assert.equal(result, expectedResult);
    })
  });

  describe("filtering", () => {
    it("values", () => {
      const val = {
        foo: "<a>",
        bar: '"b"',
        baz: "'&whee'",
      };
      const config = {
        filter: {
          "<": "&lt;",
          ">": "&gt;",
          '"': "&quot;",
          "'": "&apos;",
          "&": "&amp;",
        },
      };
      const result = toXML(val, config);
      const expectedResult =
        "<foo>&lt;a&gt;</foo><bar>&quot;b&quot;</bar><baz>&apos;&amp;whee&apos;</baz>";
      assert.equal(result, expectedResult);
    });

    it("attributes", () => {
      const val = {
        _name: "foo",
        _attrs: { a: '<"\'&"foo>' },
      };
      const config = {
        attributesFilter: {
          "<": "&lt;",
          ">": "&gt;",
          '"': "&quot;",
          "'": "&apos;",
          "&": "&amp;",
        },
      };
      const result = toXML(val, config);
      const expectedResult = '<foo a="&lt;&quot;&apos;&amp;&quot;foo&gt;"/>';
      assert.equal(result, expectedResult);
    });

    const entities = {
      "&": "&amp;",
      "<": "&lt;",
      ">": "&gt;",
    };

    Object.entries(entities).forEach(([entity, entityEncoded]) => {
      it(`filters '${entity}' entities by default`, () => {
        const val = {
          _name: "foo",
          _attrs: { a: `aaa ${entity} bbb` },
          _content: `foo ${entity} bar`,
        };
        const result = toXML(val);
        const expectedResult = `<foo a="aaa ${entityEncoded} bbb">foo ${entityEncoded} bar</foo>`;
        assert.equal(result, expectedResult);
      });
    });

    it(`filters entities by default 2`, () => {
      const val = {
        foo: '1 < 2 & 2 > 1'
      };
      const result = toXML(val);
      const expectedResult = `<foo>1 &lt; 2 &amp; 2 &gt; 1</foo>`;
      assert.equal(result, expectedResult);
    });

    it("does not double encode", () => {
      const val = {
        _name: "foo",
        _attrs: { a: "baz &amp; &gt; &lt; bat" },
        _content: "foo &amp; &gt; &lt; bar",
      };
      const result = toXML(val);
      const expectedResult =
        '<foo a="baz &amp; &gt; &lt; bat">foo &amp; &gt; &lt; bar</foo>';
      assert.equal(result, expectedResult);
    });

    it("does not double encode 2", () => {
      const val = {
        _name: "foo",
        _attrs: { a: "baz &&amp; &&gt; &&lt; bat" },
        _content: "foo &&amp; &&gt; &&lt; bar",
      };
      const result = toXML(val);
      const expectedResult =
        '<foo a="baz &amp;&amp; &amp;&gt; &amp;&lt; bat">foo &amp;&amp; &amp;&gt; &amp;&lt; bar</foo>';
      assert.equal(result, expectedResult);
    });

    it("does not double encode 3", () => {
      const val = {
        _name: "foo",
        _attrs: { a: "&cent; &#162; &euro; &#8364; &eu ro;" },
        _content: "&cent; &#162; &euro; &#8364; &eu ro;",
      };
      const result = toXML(val);
      const expectedResult =
        '<foo a="&cent; &#162; &euro; &#8364; &amp;eu ro;">&cent; &#162; &euro; &#8364; &amp;eu ro;</foo>';
      assert.equal(result, expectedResult);
    });

    it("escapes quotes in attributes by default", () => {
      const val = {
        _name: "foo",
        _attrs: { a: '"bat"' },
      };
      const result = toXML(val);
      const expectedResult = '<foo a="&quot;bat&quot;"/>';
      assert.equal(result, expectedResult);
    });

    it(`turns off attributes filter`, () => {
      const val = {
        _name: "foo",
        _attrs: { a: "baz & < > \" bat" },
        _content: "foo & < > bar",
      };
      const result = toXML(val, { attributesFilter: false });
      const expectedResult = `<foo a="baz & < > \" bat">foo &amp; &lt; &gt; bar</foo>`;
      assert.equal(result, expectedResult);
    });

    it(`turns off filter`, () => {
      const val = {
        _name: "foo",
        _attrs: { a: "baz & < > \" bat" },
        _content: "foo & < > bar",
      };
      const result = toXML(val, { filter: false });
      const expectedResult = `<foo a="baz &amp; &lt; &gt; &quot; bat">foo & < > bar</foo>`;
      assert.equal(result, expectedResult);
    });

    it(`turns off both filter and attributesFilter`, () => {
      const val = {
        _name: "foo",
        _attrs: { a: "baz & < > \" bat" },
        _content: "foo & < > bar",
      };
      const result = toXML(val, { filter: false, attributesFilter: false });
      const expectedResult = `<foo a="baz & < > \" bat">foo & < > bar</foo>`;
      assert.equal(result, expectedResult);
    });
  });

  describe("misc", () => {
    it("outputs <_content> if it has no tag name", () => {
      const val = {
        _content: "foo",
      };
      const result = toXML(val);
      const expectedResult = "<_content>foo</_content>";
      assert.equal(result, expectedResult);
    });

    it("outputs emoji attributes", () => {
      const val = {
        html: {
          _attrs: [{ "⚡": true }, { lang: "en" }, { lang: "klingon" }],
        },
      };
      const result = toXML(val, { attributesFilter: {} });
      const expectedResult = '<html ⚡ lang="en" lang="klingon"/>';
      assert.equal(result, expectedResult);
    });

    it("outputs emoji attributes 2", () => {
      const val = {
        html: {
          _attrs: { "⚡": true, lang: "en" },
        },
      };
      const result = toXML(val, { attributesFilter: {} });
      const expectedResult = '<html ⚡ lang="en"/>';
      assert.equal(result, expectedResult);
    });

    it("does not force self close if tag has content", () => {
      const val = {
        _name: "foo",
        _selfCloseTag: true,
        _content: "bar",
      };
      const result = toXML(val);
      const expectedResult = "<foo>bar</foo>";
      assert.equal(result, expectedResult);
    });

    it("nested elements with self-closing sibling", () => {
      const val = {
        people: {
          students: [
            {
              student: { name: "Joe" },
            },
            {
              student: { name: "Jane" },
            },
          ],
          teacher: {
            _selfCloseTag: true,
            _attrs: {
              name: "Yoda",
            },
          },
        },
      };
      const result = toXML(val);
      const expectedResult =
        '<people><students><student><name>Joe</name></student><student><name>Jane</name></student></students><teacher name="Yoda"/></people>';
      assert.equal(result, expectedResult);
    });

    it("sibling _content tag", () => {
      const val = {
        foo: {
          bar: "baz",
          _content: {
            bar2: "baz2",
          },
        },
      };
      const result = toXML(val);
      const expectedResult = "<foo><bar>baz</bar><bar2>baz2</bar2></foo>";
      assert.equal(result, expectedResult);
    });
  });

  describe("examples", () => {
    it("1 simple object", () => {
      const val = {
        foo: "bar",
        foo2: "bar2",
      };
      const result = toXML(val);
      const expectedResult = "<foo>bar</foo><foo2>bar2</foo2>";
      assert.equal(result, expectedResult);
    });

    it("2 simple array", () => {
      const val = [{ foo: "bar" }, { foo: "bar2" }];
      const result = toXML(val);
      const expectedResult = "<foo>bar</foo><foo>bar2</foo>";
      assert.equal(result, expectedResult);
    });

    it("3 simple function", () => {
      const date = new Date();
      const val = {
        currentTime: () => date,
      };
      const result = toXML(val);
      const expectedResult = `<currentTime>${date}</currentTime>`;
      assert.equal(result, expectedResult);
    });

    it("4 attributes", () => {
      const val = {
        _name: "foo",
        _content: "bar",
        _attrs: {
          a: "b",
          c: "d",
        },
      };
      const result = toXML(val);
      const expectedResult = '<foo a="b" c="d">bar</foo>';
      assert.equal(result, expectedResult);
    });

    it("5 tags with mixed content", () => {
      const val = {
        text1: null,
        foo: "bar",
        text2: null,
      };
      const result = toXML(val);
      const expectedResult = "text1<foo>bar</foo>text2";
      assert.equal(result, expectedResult);
    });

    it("6 nested tags with indent", () => {
      const val = {
        a: {
          foo: "bar",
          foo2: "bar2",
        },
      };
      const config = {
        header: false,
        indent: "  ",
      };
      const result = toXML(val, config);
      const expectedResult = `<a>
  <foo>bar</foo>
  <foo2>bar2</foo2>
</a>`;
      assert.equal(result, expectedResult);
    });

    it("7 nested tags attributes", () => {
      const val = {
        ooo: {
          _name: "foo",
          _attrs: {
            a: "b",
          },
          _content: {
            _name: "bar",
            _attrs: {
              c: "d",
            },
          },
        },
      };
      const config = {
        header: false,
        indent: "  ",
      };
      const result = toXML(val, config);
      const expectedResult = `<ooo>
  <foo a="b">
    <bar c="d"/>
  </foo>
</ooo>`;
      assert.equal(result, expectedResult);
    });

    it("8 complex functions", () => {
      const val = {
        someNestedXML: () => ({ foo: "bar" }),
      };
      const result = toXML(val);
      const expectedResult = "<someNestedXML><foo>bar</foo></someNestedXML>";
      assert.equal(result, expectedResult);
    });

    it("9 RSS feed", () => {
      const date = new Date();

      const val = {
        _name: "rss",
        _attrs: {
          version: "2.0",
        },
        _content: {
          channel: [
            { title: "RSS Example" },
            { description: "Description" },
            { link: "google.com" },
            { lastBuildDate: () => date },
            { pubDate: () => date },
            { language: "en" },
            {
              item: {
                title: "Item title",
                link: "Item link",
                description: "Item Description",
                pubDate: () => date,
              },
            },
            {
              item: {
                title: "Item2 title",
                link: "Item2 link",
                description: "Item2 Description",
                pubDate: () => date,
              },
            },
          ],
        },
      };
      const config = {
        header: true,
        indent: "  ",
      };
      const result = toXML(val, config);
      const expectedResult = `<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0">
  <channel>
    <title>RSS Example</title>
    <description>Description</description>
    <link>google.com</link>
    <lastBuildDate>${date}</lastBuildDate>
    <pubDate>${date}</pubDate>
    <language>en</language>
    <item>
      <title>Item title</title>
      <link>Item link</link>
      <description>Item Description</description>
      <pubDate>${date}</pubDate>
    </item>
    <item>
      <title>Item2 title</title>
      <link>Item2 link</link>
      <description>Item2 Description</description>
      <pubDate>${date}</pubDate>
    </item>
  </channel>
</rss>`;
      assert.equal(result, expectedResult);
    });

    it("10 podcast RSS", () => {
      const val = {
        _name: "rss",
        _attrs: {
          "xmlns:itunes": "http://www.itunes.com/dtds/podcast-1.0.dtd",
          version: "2.0",
        },
        _content: {
          channel: [
            { title: "Title" },
            { link: "google.com" },
            { language: "en-us" },
            { copyright: "Copyright 2011" },
            { "itunes:subtitle": "Subtitle" },
            { "itunes:author": "Author" },
            { "itunes:summary": "Summary" },
            { description: "Description" },
            {
              "itunes:owner": {
                "itunes:name": "Name",
                "itunes:email": "Email",
              },
            },
            {
              _name: "itunes:image",
              _attrs: {
                href: "image.jpg",
              },
            },
            {
              _name: "itunes:category",
              _attrs: {
                text: "Technology",
              },
              _content: {
                _name: "itunes:category",
                _attrs: {
                  text: "Gadgets",
                },
              },
            },
            {
              _name: "itunes:category",
              _attrs: {
                text: "TV &amp; Film",
              },
            },
            {
              item: [
                { title: "Podcast Title" },
                { "itunes:author": "Author" },
                { "itunes:subtitle": "Subtitle" },
                { "itunes:summary": "Summary" },
                { "itunes:image": "image.jpg" },
                {
                  _name: "enclosure",
                  _attrs: {
                    url: "http://example.com/podcast.m4a",
                    length: "8727310",
                    type: "audio/x-m4a",
                  },
                },
                { guid: "http://example.com/archive/aae20050615.m4a" },
                { pubDate: "Wed, 15 Jun 2011 19:00:00 GMT" },
                { "itunes:duration": "7:04" },
                { "itunes:keywords": "salt, pepper, shaker, exciting" },
              ],
            },
            {
              item: [
                { title: "Podcast2 Title" },
                { "itunes:author": "Author2" },
                { "itunes:subtitle": "Subtitle2" },
                { "itunes:summary": "Summary2" },
                { "itunes:image": "image2.jpg" },
                {
                  _name: "enclosure",
                  _attrs: {
                    url: "http://example.com/podcast2.m4a",
                    length: "655555",
                    type: "audio/x-m4a",
                  },
                },
                { guid: "http://example.com/archive/aae2.m4a" },
                { pubDate: "Wed, 15 Jul 2011 19:00:00 GMT" },
                { "itunes:duration": "11:20" },
                { "itunes:keywords": "foo, bar" },
              ],
            },
          ],
        },
      };
      const config = {
        header: true,
        indent: "  ",
      };

      const result = toXML(val, config);
      const expectedResult = `<?xml version="1.0" encoding="UTF-8"?>
<rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" version="2.0">
  <channel>
    <title>Title</title>
    <link>google.com</link>
    <language>en-us</language>
    <copyright>Copyright 2011</copyright>
    <itunes:subtitle>Subtitle</itunes:subtitle>
    <itunes:author>Author</itunes:author>
    <itunes:summary>Summary</itunes:summary>
    <description>Description</description>
    <itunes:owner>
      <itunes:name>Name</itunes:name>
      <itunes:email>Email</itunes:email>
    </itunes:owner>
    <itunes:image href="image.jpg"/>
    <itunes:category text="Technology">
      <itunes:category text="Gadgets"/>
    </itunes:category>
    <itunes:category text="TV &amp; Film"/>
    <item>
      <title>Podcast Title</title>
      <itunes:author>Author</itunes:author>
      <itunes:subtitle>Subtitle</itunes:subtitle>
      <itunes:summary>Summary</itunes:summary>
      <itunes:image>image.jpg</itunes:image>
      <enclosure url="http://example.com/podcast.m4a" length="8727310" type="audio/x-m4a"/>
      <guid>http://example.com/archive/aae20050615.m4a</guid>
      <pubDate>Wed, 15 Jun 2011 19:00:00 GMT</pubDate>
      <itunes:duration>7:04</itunes:duration>
      <itunes:keywords>salt, pepper, shaker, exciting</itunes:keywords>
    </item>
    <item>
      <title>Podcast2 Title</title>
      <itunes:author>Author2</itunes:author>
      <itunes:subtitle>Subtitle2</itunes:subtitle>
      <itunes:summary>Summary2</itunes:summary>
      <itunes:image>image2.jpg</itunes:image>
      <enclosure url="http://example.com/podcast2.m4a" length="655555" type="audio/x-m4a"/>
      <guid>http://example.com/archive/aae2.m4a</guid>
      <pubDate>Wed, 15 Jul 2011 19:00:00 GMT</pubDate>
      <itunes:duration>11:20</itunes:duration>
      <itunes:keywords>foo, bar</itunes:keywords>
    </item>
  </channel>
</rss>`;
      assert.equal(result, expectedResult);
    });

    it("11 filter", () => {
      const val = {
        foo: "<a>",
        bar: '"b"',
        baz: "'&whee'",
      };
      const config = {
        filter: {
          "<": "&lt;",
          ">": "&gt;",
          '"': "&quot;",
          "'": "&apos;",
          "&": "&amp;",
        },
      };
      const result = toXML(val, config);
      const expectedResult =
        "<foo>&lt;a&gt;</foo><bar>&quot;b&quot;</bar><baz>&apos;&amp;whee&apos;</baz>";
      assert.equal(result, expectedResult);
    });

    it("11b attributes filter", () => {
      const val = {
        _name: "foo",
        _content: "bar",
        _attrs: {
          a: "http://example.com/?test='1'&foo=<bar>&whee=\"sha\"",
          b: "http://example2.com/?test='2'&md=<5>&sum=\"sha\"",
        },
      };
      const config = {
        attributesFilter: {
          "<": "&lt;",
          ">": "&gt;",
          '"': "&quot;",
          "'": "&apos;",
          "&": "&amp;",
        },
      };
      const result = toXML(val, config);
      const expectedResult =
        '<foo a="http://example.com/?test=&apos;1&apos;&amp;foo=&lt;bar&gt;&amp;whee=&quot;sha&quot;" b="http://example2.com/?test=&apos;2&apos;&amp;md=&lt;5&gt;&amp;sum=&quot;sha&quot;">bar</foo>';
      assert.equal(result, expectedResult);
    });

    it("12 avoiding self closing tags", () => {
      const val = [
        {
          _name: "foo",
          _content: "",
          _selfCloseTag: false,
        },
        {
          _name: "bar",
          _content: undefined,
          _selfCloseTag: false,
        },
      ];
      const result = toXML(val);
      const expectedResult = "<foo></foo><bar></bar>";
      assert.equal(result, expectedResult);
    });

    it("13 custom xml header", () => {
      const val = {
        foo: "bar",
      };
      const config = {
        header: '<?xml version="1.0" encoding="UTF-16" standalone="yes"?>',
      };
      const result = toXML(val, config);
      const expectedResult =
        '<?xml version="1.0" encoding="UTF-16" standalone="yes"?><foo>bar</foo>';
      assert.equal(result, expectedResult);
    });

    it("14 emoji attributes", () => {
      const val = {
        html: {
          _attrs: {
            "⚡": true,
          },
        },
      };
      const result = toXML(val);
      const expectedResult = "<html ⚡/>";
      assert.equal(result, expectedResult);
    });

    it("15 duplicate attribute keys", () => {
      const val = {
        html: {
          _attrs: [{ lang: "en" }, { lang: "klingon" }],
        },
      };
      const result = toXML(val);
      const expectedResult = '<html lang="en" lang="klingon"/>';
      assert.equal(result, expectedResult);
    });
  });

  describe("issues", () => {
    it("issue #33: array of primitives", () => {
      const val = {
        x: [1, 2, 3],
      };
      const result = toXML(val);
      const expectedResult = "<x>1</x><x>2</x><x>3</x>";
      assert.equal(result, expectedResult);
    });

    it("issue #33: array of primitives 2", () => {
      const val = {
        a: {
          x: [1, 2, 3],
        },
      };
      const result = toXML(val);
      const expectedResult = "<a><x>1</x><x>2</x><x>3</x></a>";
      assert.equal(result, expectedResult);
    });

    it("issue #33: array of primitives 2 with indent", () => {
      const val = {
        a: {
          x: [1, 2, 3],
        },
      };
      const config = { indent: "  " };
      const result = toXML(val, config);
      const expectedResult = "<a>\n  <x>1</x>\n  <x>2</x>\n  <x>3</x>\n</a>";
      assert.equal(result, expectedResult);
    });
    it("issue #33: array of objects", () => {
      const val = {
        a: {
          x: [
            { b: 1, c: 2 },
            { d: 3, e: 4 },
            { f: 5, g: 6 },
          ],
        },
      };
      const result = toXML(val);
      const expectedResult =
        "<a><x><b>1</b><c>2</c><d>3</d><e>4</e><f>5</f><g>6</g></x></a>";
      assert.equal(result, expectedResult);
    });
    it("issue #33: array of objects jstoxml format", () => {
      const val = {
        a: [
          {
            _name: "foo",
            _content: "1",
          },
          {
            _name: "foo",
            _content: "2",
          },
        ],
      };
      const result = toXML(val);
      const expectedResult = "<a><foo>1</foo><foo>2</foo></a>";
      assert.equal(result, expectedResult);
    });
    it("issue #34: array of array", () => {
      const val = {
        Response: [
          [
            {
              _name: "Play",
              _content: "first sound",
            },
            {
              _name: "Play",
              _content: "second sound",
            },
          ],
        ],
      };
      const result = toXML(val);
      const expectedResult =
        "<Response><Play>first sound</Play><Play>second sound</Play></Response>";
      assert.equal(result, expectedResult);
    });
    it("issue #34", () => {
      const val = { t: [{ foo: "bar" }, { foo: "bar2" }] };
      const result = toXML(val);
      const expectedResult = "<t><foo>bar</foo><foo>bar2</foo></t>";
      assert.equal(result, expectedResult);
    });
    it("issue #34", () => {
      const val = {
        t: [
          { _name: "foo", _content: "bar" },
          { _name: "foo", _content: "bar2" },
        ],
      };
      const result = toXML(val);
      const expectedResult = "<t><foo>bar</foo><foo>bar2</foo></t>";
      assert.equal(result, expectedResult);
    });

    it("issue #38", () => {
      const getFooVal = (iteration) => iteration;

      const getCurrentTime = (iterations) => {
        return Array(iterations)
          .fill(null)
          .map((foo, index) => {
            return {
              currentTime: {
                foo: getFooVal.bind(null, index + 1),
              },
            };
          });
      };

      const val = {
        invoice1: [
          {
            invoice: "a",
          },
          getCurrentTime.bind(null, 3),
          {
            foo2: "a",
          },
        ],
      };
      const config = { indent: "  " };
      const result = toXML(val, config);

      const expectedResult = `<invoice1>
  <invoice>a</invoice>
  <currentTime>
    <foo>1</foo>
  </currentTime>
  <currentTime>
    <foo>2</foo>
  </currentTime>
  <currentTime>
    <foo>3</foo>
  </currentTime>
  <foo2>a</foo2>
</invoice1>`;
      assert.equal(result, expectedResult);
    });

    it("issue #40 forced separator, no indent", () => {
      const val = [{ a: "A Value" }, "\n", { b: "B Value" }];
      const result = toXML(val);
      const expectedResult = `<a>A Value</a>
<b>B Value</b>`;
      assert.equal(result, expectedResult);
    });

    it("issue #40 array with indent", () => {
      const val = [{ a: "A Value" }, { b: "B Value" }];
      const result = toXML(val, { indent: "  " });
      const expectedResult = `<a>A Value</a>
<b>B Value</b>`;
      assert.equal(result, expectedResult);
    });

    it("issue #40 array without indent", () => {
      const val = [{ a: "A Value" }, { b: "B Value" }];
      const result = toXML(val);
      const expectedResult = `<a>A Value</a><b>B Value</b>`;
      assert.equal(result, expectedResult);
    });

    it("issue #40 object with indent", () => {
      const val = {
        a: "A Value",
        b: "B Value",
      };
      const result = toXML(val, { indent: "  " });
      const expectedResult = `<a>A Value</a>
<b>B Value</b>`;
      assert.equal(result, expectedResult);
    });

    it("issue #40 object without indent", () => {
      const val = {
        a: "A Value",
        b: "B Value",
      };
      const result = toXML(val);
      const expectedResult = `<a>A Value</a><b>B Value</b>`;
      assert.equal(result, expectedResult);
    });
  });
});