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textplain_test.go
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textplain_test.go
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package textplain_test
import (
"strings"
"testing"
"github.com/mailproto/textplain"
"github.com/stretchr/testify/assert"
)
type testCase struct {
name string
body string
expect string
}
func TestConvert(t *testing.T) {
runTestCases(t, []testCase{
{
name: "html fragment",
body: "<p>Test</p>",
expect: "Test",
},
{
name: "html with body element",
body: `<html>
<title>Ignore me</title>
<body>
<p>Test</p>
</body>
</html>`,
expect: "Test",
},
{
name: "malformed body",
body: `<html>
<title>Ignore me</title>
<body>
<p>Test`,
expect: "Test",
},
{
name: "special characters",
body: "cédille garçon & à ñ",
expect: "cédille garçon & à ñ",
},
})
}
func TestStrippingWhitespace(t *testing.T) {
runTestCases(t, []testCase{
{
name: "leading tab, trailing newline",
body: " \ttext\ntext\n",
expect: "text\ntext",
},
{
name: "leading newline, trailing tab, infix spaces",
body: " \na \n a \t",
expect: "a\na",
},
{
name: "leading and infix newlines, trailing tab",
body: " \na \n\t \n \n a \t",
expect: "a\n\na",
},
{
name: "trailing non-breaking space",
body: "test text ",
expect: "test text",
},
{
name: "infix repeated space",
body: "test text",
expect: "test text",
},
})
}
func TestWrappingSpans(t *testing.T) {
runTestCases(t, []testCase{
{
body: `<html>
<body>
<p><span>Test</span>
<span>line 2</span>
</p>`,
expect: `Test line 2`,
},
{
body: `<html>
<body>
<p><span>Test</span>
<span> spans </span>
<p>inbetween</p>
<span>line 2</span>
<span>
again
</span>
</p>`,
expect: "Test spans\n\ninbetween\n\nline 2\nagain",
},
{
name: "tables and spans",
body: `<table>
<tbody>
<tr>
<td>
<span>ID</span>
<p>ABC-1234</p>
</td>
<td>
<span>Date</span>
<p>Mar 29, 2023</p>
</td>
</tr>
</tbody>
</table>`,
expect: "ID\nABC-1234\n\nDate\nMar 29, 2023",
},
})
}
func TestLineBreaks(t *testing.T) {
runTestCases(t, []testCase{
{
name: "line feed and newline become newline",
body: "Test text\r\nTest text",
expect: "Test text\nTest text",
},
{
name: "line feed becomes newline",
body: "Test text\rTest text",
expect: "Test text\nTest text",
},
})
}
func TestLists(t *testing.T) {
runTestCases(t, []testCase{
{
name: "list items without list wrapper",
body: "<li class='123'>item 1</li> <li>item 2</li>\n",
expect: "* item 1\n* item 2",
},
{
name: "list items with infix whitespace",
body: "<li>item 1</li> \t\n <li>item 2</li> <li> item 3</li>\n",
expect: "* item 1\n* item 2\n* item 3",
},
{
name: "list items with <ul>",
body: "<ul><li>item 1</li><li>item 2</li><li>item 3</li></ul>",
expect: "* item 1\n* item 2\n* item 3",
},
{
name: "list items with <ol>",
body: "<ol><li>item 1</li><li>item 2</li><li>item 3</li></ol>",
expect: "* item 1\n* item 2\n* item 3",
},
{
name: "list items with <ul> and infix whitespace",
body: "<ul><li>item 1</li> \t\n\t <li>item 2</li><li>item 3</li></ul>",
expect: "* item 1\n* item 2\n* item 3",
},
{
name: "list with leading whitespace",
body: "<p>hello</p>\n\n\n<ul><li>item 1</li><li>item 2</li><li>item 3</li></ul>",
expect: "hello\n\n* item 1\n* item 2\n* item 3",
},
{
name: "list with leading and trailing whitespace",
body: "<p>hello</p>\n\n\n<ul><li>item 1</li><li>item 2</li><li>item 3</li></ul>\n\n<p>hi</p>",
expect: "hello\n\n* item 1\n* item 2\n* item 3\n\nhi",
},
})
}
func TestStrippingHTML(t *testing.T) {
runTestCases(t, []testCase{
{
name: "strip html",
body: "<p class=\"123'45 , att\" att=tester>test <span class='te\"st'>text</span>\n",
expect: "test text",
},
{
name: "strip ignored blocks",
body: `<p>test</p>
<!-- start text/html -->
<img src="logo.png" alt="logo">
<!-- end text/html -->
<p>text</p>`,
expect: "test\n\ntext",
},
})
}
func TestParagraphsAndBreaks(t *testing.T) {
runTestCases(t, []testCase{
{
name: "paragraphs",
body: "<p>Test text</p><p>Test text</p>",
expect: "Test text\n\nTest text",
},
{
name: "paragraphs with whitespace",
body: "\n<p>Test text</p>\n\n\n\t<p>Test text</p>\n",
expect: "Test text\n\nTest text",
},
{
name: "paragraph with infix break",
body: "\n<p>Test text<br/>Test text</p>\n",
expect: "Test text\nTest text",
},
{
name: "paragraph with end break",
body: "\n<p>Test text<br> \tTest text<br></p>\n",
expect: "Test text\nTest text",
},
{
name: "full caps break",
body: "Test text<br><BR />Test text",
expect: "Test text\n\nTest text",
},
})
}
func TestHeadings(t *testing.T) {
runTestCases(t, []testCase{
{
name: "h1",
body: "<h1>Test</h1>",
expect: "****\nTest\n****",
},
{
name: "h1 with whitespace",
body: "\t<h1>\nTest</h1>",
expect: "****\nTest\n****",
},
{
name: "multiline h1",
body: "\t<h1>\nTest line 1<br>Test 2</h1> ",
expect: "***********\nTest line 1\nTest 2\n***********",
},
{
name: "multiple h1 tags",
body: "<h1>Test</h1> <h1>Test</h1>",
expect: "****\nTest\n****\n\n****\nTest\n****",
},
{
name: "h2",
body: "<h2>Test</h2>",
expect: "----\nTest\n----",
},
{
name: "h3",
body: "<h3> <span class='a'>Test </span></h3>",
expect: "Test\n----",
},
})
}
func TestAppliesLineWrapping(t *testing.T) {
txt, err := textplain.Convert(strings.Repeat("test ", 100), 20)
if err != nil {
t.Error(err)
}
var offendingLines []int
for i, line := range strings.Split(txt, "\n") {
if len(line) > 20 {
offendingLines = append(offendingLines, i)
}
}
if len(offendingLines) > 0 {
t.Errorf("Found lines longer than 20 chars: %v", offendingLines)
}
}
func TestWrappingLinesWithSpaces(t *testing.T) {
runTestCases(t, []testCase{
{
name: "no wrap",
body: "Long " + strings.Repeat(" ", textplain.DefaultLineLength) + "space doesn't wrap",
expect: "Long space doesn't wrap",
},
{
name: "wrap on proper line",
body: "Long " + strings.Repeat("A", textplain.DefaultLineLength) + " wraps",
expect: "Long\n" + strings.Repeat("A", textplain.DefaultLineLength) + " wraps",
},
})
}
func TestWrappingDoesntBreakWords(t *testing.T) {
runTestCase(t, testCase{
body: strings.Repeat("A", textplain.DefaultLineLength+1),
expect: strings.Repeat("A", textplain.DefaultLineLength+1),
})
}
func TestImgAltTags(t *testing.T) {
runTestCases(t, []testCase{
{
name: "self-closed img tag with alt value",
body: `<a href="http://example.com/"><img src="http://example.ru/hello.jpg" alt="Example"/></a>`,
expect: "Example ( http://example.com/ )",
},
{
name: "open img tag with alt value",
body: `<a href="http://example.com/"><img src="http://example.ru/hello.jpg" alt="Example"></a>`,
expect: "Example ( http://example.com/ )",
},
{
name: "self-closed img tag single quoted with alt",
body: `<a href='http://example.com/'><img src='http://example.ru/hello.jpg' alt='Example'/></a>`,
expect: "Example ( http://example.com/ )",
},
{
name: "open img tag single quoted with alt",
body: `<a href='http://example.com/'><img src='http://example.ru/hello.jpg' alt='Example'></a>`,
expect: "Example ( http://example.com/ )",
},
})
}
func TestLinks(t *testing.T) {
runTestCases(t, []testCase{
{
name: "simple link",
body: `<a href="http://example.com/">Link</a>`,
expect: `Link ( http://example.com/ )`,
},
{
name: "link with nested html",
body: `<a href="http://example.com/"><span class="a">Link</span></a>`,
expect: `Link ( http://example.com/ )`,
},
{
name: "nested html with a new line",
body: "<a href='http://example.com/'>\n\t<span class='a'>Link</span>\n\t</a>",
expect: `Link ( http://example.com/ )`,
},
{
name: "mailto link",
body: `<a href='mailto:[email protected]'>Contact Us</a>`,
expect: `Contact Us ( [email protected] )`,
},
{
name: "complicated link",
body: `<a href="http://example.com:80/~user?aaa=bb&c=d,e,f#foo">Link</a>`,
expect: `Link ( http://example.com:80/~user?aaa=bb&c=d,e,f#foo )`,
},
{
name: "link with attribute",
body: `<a title='title' href="http://example.com/">Link</a>`,
expect: `Link ( http://example.com/ )`,
},
{
name: "href attribute spacing",
body: `<a href=" http://example.com/ "> Link </a>`,
expect: `Link ( http://example.com/ )`,
},
{
name: "multiple links",
body: `<a href="http://example.com/a/">Link A</a> <a href="http://example.com/b/">Link B</a>`,
expect: `Link A ( http://example.com/a/ ) Link B ( http://example.com/b/ )`,
},
{
name: "link containing merge tag",
body: `<a href="%%LINK%%">Link</a>`,
expect: `Link ( %%LINK%% )`,
},
{
name: "link in square brackets",
body: `<a href="[LINK]">Link</a>`,
expect: `Link ( [LINK] )`,
},
{
name: "link in curly braces",
body: `<a href="{LINK}">Link</a>`,
expect: `Link ( {LINK} )`,
},
{
name: "unsubscribe",
body: `<a href="[[!unsubscribe]]">Link</a>`,
expect: `Link ( [[!unsubscribe]] )`,
},
{
name: "empty link gets dropped, and shouldn`t run forever",
body: "<a href=\"test\"></a>" + strings.Repeat("\n<p>This is some more text</p>", 15),
expect: strings.Repeat("This is some more text\n\n", 14) + "This is some more text",
},
{
name: "links that go outside of line should wrap nicely",
body: "Long text before the actual link and then LINK TEXT \n( http://www.long.link ) and then more text that does not wrap",
expect: "Long text before the actual link and then LINK TEXT\n( http://www.long.link ) and then more text that does not wrap",
},
{
name: "same text and link",
body: `<a href="http://example.com">http://example.com</a>`,
expect: `http://example.com`,
},
{
name: "long links stay on a single line",
body: `<a href="http://example.com/` + strings.Repeat("A", textplain.DefaultLineLength) + `">Hello</a>`,
expect: `Hello
( http://example.com/` + strings.Repeat("A", textplain.DefaultLineLength) + ` )`,
},
{
name: "long non-http links stay on a single line",
body: `<a href="gopher://example.com/` + strings.Repeat("A", textplain.DefaultLineLength) + `">Hello</a>`,
expect: `Hello
( gopher://example.com/` + strings.Repeat("A", textplain.DefaultLineLength) + ` )`,
},
{
name: "link wrapping image",
body: `<a href="http://example.com"><img src="https://images.com/image.png" /></a>`,
expect: `( http://example.com )`,
},
})
}
// see https://github.com/premailer/premailer/issues/72
func TestMultipleLinksPerLine(t *testing.T) {
plain, err := textplain.Convert(`<p>This is <a href="http://www.google.com" >link1</a> and <a href="http://www.google.com" >link2 </a> is next.</p>`, 10000)
assert.Nil(t, err)
assert.Equal(t, plain, `This is link1 ( http://www.google.com ) and link2 ( http://www.google.com ) is next.`)
}
// see https://github.com/premailer/premailer/issues/72
func TestLinksWithinHeadings(t *testing.T) {
runTestCases(t, []testCase{
{
body: "<h1><a href='http://example.com/'>Test</a></h1>",
expect: "****************************\nTest ( http://example.com/ )\n****************************",
},
})
}
func TestStripsNonContentTags(t *testing.T) {
runTestCase(t, testCase{
body: `<html>
<body>
<script type="text/javascript">
alert("haxx");
</script>
No hacks here
<style>
p {
font-weight: bold;
}
</style>
<p>
This is not a bold statement
</p>
</body>
</html>`,
expect: "No hacks here\n\nThis is not a bold statement",
})
}
func TestMultilineTitles(t *testing.T) {
runTestCase(t, testCase{
body: `<h1>Horse
Friends
Yeah
</h1>`,
expect: "*******\nHorse\nFriends\nYeah\n*******",
})
}
func TestWrappingDoesntAddUnnecessaryLineBreaks(t *testing.T) {
runTestCase(t, testCase{
body: `.stylesheet {
color: white;
background-image: url('data:image/png;base64,` + strings.Repeat("A", textplain.DefaultLineLength) + `');
font-weight: bold;
margin: 0px;
}`,
expect: `.stylesheet {
color: white;
background-image:
url('data:image/png;base64,` + strings.Repeat("A", textplain.DefaultLineLength) + `');
font-weight: bold;
margin: 0px;
}`,
})
}
func TestStrippingComments(t *testing.T) {
runTestCases(t, []testCase{
{
name: "comment in tag",
body: "<p>in<!--comment 1-->between</p>",
expect: "inbetween",
},
{
name: "comment between tags",
body: `<p>before</p><!--comment 1--><p>after</p>`,
expect: "before\n\nafter",
},
{
name: "commented out tag",
body: `<p>before</p><!--comment 1<div>random</div>--><p>after</p>`,
expect: "before\n\nafter",
},
{
name: "multiline comment",
body: `<p>before</p>
<!--
replacing unordered list with an ordered one.
uncomment out incase it breaks stuff.
<h2>An Unordered HTML List</h2>
<ul>
<li>Coffee</li>
<li>Tea</li>
<li>Milk</li>
</ul>
-->
<p>after</p>`,
expect: "before\n\nafter",
},
{
name: "comment within comment",
body: `<p>before</p>
<!--
some reason to comment out the whole block
<h2>An Unordered HTML List</h2>
<ul>
<li>Coffee</li>
<li>Tea</li>
<li>Milk</li>
</ul>
<!-- awesome -->
<p>sweet list</p>
-->
<p>after</p>`,
expect: "before\n\nsweet list\n\n-->\nafter",
},
})
}
func TestFixSpacing(t *testing.T) {
runTestCase(t, testCase{
name: "ends in *",
body: "<p>hello</p>*",
expect: "hello\n\n*",
})
}