concat_1: {
    options = {
        evaluate: true
    };
    input: {
        var a = "foo" + "bar" + x() + "moo" + "foo" + y() + "x" + "y" + "z" + q();
        var b = "foo" + 1 + x() + 2 + "boo";
        var c = 1 + x() + 2 + "boo";

        // this CAN'T safely be shortened to 1 + x() + "5boo"
        var d = 1 + x() + 2 + 3 + "boo";

        var e = 1 + x() + 2 + "X" + 3 + "boo";

        // be careful with concatentation with "\0" with octal-looking strings.
        var f = "\0" + 360 + "\0" + 8 + "\0";
    }
    expect: {
        var a = "foobar" + x() + "moofoo" + y() + "xyz" + q();
        var b = "foo1" + x() + "2boo";
        var c = 1 + x() + 2 + "boo";
        var d = 1 + x() + 2 + 3 + "boo";
        var e = 1 + x() + 2 + "X3boo";
        var f = "\x00360\x008\0";
    }
}

concat_2: {
    options = {};
    input: {
        console.log(
            1 + (2 + 3),
            1 + (2 + "3"),
            1 + ("2" + 3),
            1 + ("2" + "3"),
            "1" + (2 + 3</td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=195854a50ce8e9abe15db24b4808f78fe52ce620'>refs</a><a href='/guix/log/gnu/services/kerberos.scm'>log</a><a href='/guix/tree/gnu/services/kerberos.scm?id=195854a50ce8e9abe15db24b4808f78fe52ce620'>tree</a><a href='/guix/commit/gnu/services/kerberos.scm?id=195854a50ce8e9abe15db24b4808f78fe52ce620'>commit</a><a class='active' href='/guix/diff/gnu/services/kerberos.scm?id=195854a50ce8e9abe15db24b4808f78fe52ce620'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/services/kerberos.scm'>
<input type='hidden' name='id' value='195854a50ce8e9abe15db24b4808f78fe52ce620'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/diff/?id=195854a50ce8e9abe15db24b4808f78fe52ce620'>root</a>/<a href='/guix/diff/gnu?id=195854a50ce8e9abe15db24b4808f78fe52ce620'>gnu</a>/<a href='/guix/diff/gnu/services?id=195854a50ce8e9abe15db24b4808f78fe52ce620'>services</a>/<a href='/guix/diff/gnu/services/kerberos.scm?id=195854a50ce8e9abe15db24b4808f78fe52ce620'>kerberos.scm</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='195854a50ce8e9abe15db24b4808f78fe52ce620'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/guix/diff/?id=195854a50ce8e9abe15db24b4808f78fe52ce620'>Diffstat</a> (limited to 'gnu/services/kerberos.scm')</div><table summary='diffstat' class='diffstat'> + ("3" + "4" + "5")
        );
    }
    expect: {
        console.log(
            "1" + "2" + (3 + 4 + 5),
            "1" + "2" + (3 + 4) + "5",
            "1" + "2" + 3 + "4" + 5,
            "1" + "2" + 3 + "4" + "5",
            "1" + "2" + "3" + 4 + 5,
            "1" + "2" + "3" + 4 + "5",
            "1" + "2" + "3" + "4" + 5,
            "1" + "2" + "3" + "4" + "5"
        );
    }
    expect_stdout: true
}

concat_7: {
    input: {
        console.log(
            "" + 1,
            "" + "1",
            "" + 1 + 2,
            "" + 1 + "2",
            "" + "1" + 2,
            "" + "1" + "2",
            "" + (x += "foo")
        );
    }
    expect: {
        console.log(
            "" + 1,
            "1",
            "" + 1 + 2,
            1 + "2",
            "1" + 2,
            "1" + "2",
            x += "foo"
        );
    }
    expect_stdout: true
}

concat_8: {
    input: {
        console.log(
            1 + "",
            "1" + "",
            1 + 2 + "",
            1 + "2" + "",
            "1" + 2 + "",
            "1" + "2" + "",
            (x += "foo") + ""
        );
    }
    expect: {
        console.log(
            1 + "",
            "1",
            1 + 2 + "",
            1 + "2",
            "1" + 2,
            "1" + "2",
            x += "foo"
        );
    }
    expect_stdout: true
}