//
// Black Friday Markdown Processor
// Originally based on http://github.com/tanoku/upskirt
// by Russ Ross <russ@russross.com>
//

//
// Unit tests for inline parsing
//

package blackfriday

import (
	"testing"
)

func runMarkdown(input string) string {
	var extensions uint32
	extensions |= EXTENSION_NO_INTRA_EMPHASIS
	extensions |= EXTENSION_TABLES
	extensions |= EXTENSION_FENCED_CODE
	extensions |= EXTENSION_AUTOLINK
	extensions |= EXTENSION_STRIKETHROUGH
	extensions |= EXTENSION_SPACE_HEADERS
	extensions |= EXTENSION_LAX_HTML_BLOCKS

	html_flags := 0
	html_flags |= HTML_USE_XHTML
	html_flags |= HTML_USE_SMARTYPANTS
	html_flags |= HTML_SMARTYPANTS_FRACTIONS
	html_flags |= HTML_SMARTYPANTS_LATEX_DASHES

	renderer := HtmlRenderer(html_flags)

	return string(Markdown([]byte(input), renderer, extensions))
}

func doTests(t *testing.T, tests []string) {
	for i := 0; i+1 < len(tests); i += 2 {
		input := tests[i]
		expected := tests[i+1]
		actual := runMarkdown(input)
		if actual != expected {
			t.Errorf("\nInput   [%#v]\nExpected[%#v]\nActual  [%#v]",
				input, expected, actual)
		}
	}
}

func TestEmphasis(t *testing.T) {
	var tests = []string{
		"nothing inline\n",
		"<p>nothing inline</p>\n",

		"simple *inline* test\n",
		"<p>simple <em>inline</em> test</p>\n",

		"*at the* beginning\n",
		"<p><em>at the</em> beginning</p>\n",

		"at the *end*\n",
		"<p>at the <em>end</em></p>\n",

		"*try two* in *one line*\n",
		"<p><em>try two</em> in <em>one line</em></p>\n",

		"over *two\nlines* test\n",
		"<p>over <em>two\nlines</em> test</p>\n",

		"odd *number of* markers* here\n",
		"<p>odd <em>number of</em> markers* here</p>\n",

		"odd *number\nof* markers* here\n",
		"<p>odd <em>number\nof</em> markers* here</p>\n",

		"simple _inline_ test\n",
		"<p>simple <em>inline</em> test</p>\n",

		"_at the_ beginning\n",
		"<p><em>at the</em> beginning</p>\n",

		"at the _end_\n",
		"<p>at the <em>end</em></p>\n",

		"_try two_ in _one line_\n",
		"<p><em>try two</em> in <em>one line</em></p>\n",

		"over _two\nlines_ test\n",
		"<p>over <em>two\nlines</em> test</p>\n",

		"odd _number of_ markers_ here\n",
		"<p>odd <em>number of</em> markers_ here</p>\n",

		"odd _number\nof_ markers_ here\n",
		"<p>odd <em>number\nof</em> markers_ here</p>\n",

		"mix of *markers_\n",
		"<p>mix of *markers_</p>\n",
	}
	doTests(t, tests)
}

func TestStrong(t *testing.T) {
	var tests = []string{
		"nothing inline\n",
		"<p>nothing inline</p>\n",

		"simple **inline** test\n",
		"<p>simple <strong>inline</strong> test</p>\n",

		"**at the** beginning\n",
		"<p><strong>at the</strong> beginning</p>\n",

		"at the **end**\n",
		"<p>at the <strong>end</strong></p>\n",

		"**try two** in **one line**\n",
		"<p><strong>try two</strong> in <strong>one line</strong></p>\n",

		"over **two\nlines** test\n",
		"<p>over <strong>two\nlines</strong> test</p>\n",

		"odd **number of** markers** here\n",
		"<p>odd <strong>number of</strong> markers** here</p>\n",

		"odd **number\nof** markers** here\n",
		"<p>odd <strong>number\nof</strong> markers** here</p>\n",

		"simple __inline__ test\n",
		"<p>simple <strong>inline</strong> test</p>\n",

		"__at the__ beginning\n",
		"<p><strong>at the</strong> beginning</p>\n",

		"at the __end__\n",
		"<p>at the <strong>end</strong></p>\n",

		"__try two__ in __one line__\n",
		"<p><strong>try two</strong> in <strong>one line</strong></p>\n",

		"over __two\nlines__ test\n",
		"<p>over <strong>two\nlines</strong> test</p>\n",

		"odd __number of__ markers__ here\n",
		"<p>odd <strong>number of</strong> markers__ here</p>\n",

		"odd __number\nof__ markers__ here\n",
		"<p>odd <strong>number\nof</strong> markers__ here</p>\n",

		"mix of **markers__\n",
		"<p>mix of **markers__</p>\n",
	}
	doTests(t, tests)
}

func TestEmphasisMix(t *testing.T) {
	var tests = []string{
		"***triple emphasis***\n",
		"<p><strong><em>triple emphasis</em></strong></p>\n",

		"***triple\nemphasis***\n",
		"<p><strong><em>triple\nemphasis</em></strong></p>\n",

		"___triple emphasis___\n",
		"<p><strong><em>triple emphasis</em></strong></p>\n",

		"***triple emphasis___\n",
		"<p>***triple emphasis___</p>\n",

		"*__triple emphasis__*\n",
		"<p><em><strong>triple emphasis</strong></em></p>\n",

		"__*triple emphasis*__\n",
		"<p><strong><em>triple emphasis</em></strong></p>\n",

		"**improper *nesting** is* bad\n",
		"<p><strong>improper *nesting</strong> is* bad</p>\n",

		"*improper **nesting* is** bad\n",
		"<p><em>improper **nesting</em> is** bad</p>\n",
	}
	doTests(t, tests)
}

func TestStrikeThrough(t *testing.T) {
	var tests = []string{
		"nothing inline\n",
		"<p>nothing inline</p>\n",

		"simple ~~inline~~ test\n",
		"<p>simple <del>inline</del> test</p>\n",

		"~~at the~~ beginning\n",
		"<p><del>at the</del> beginning</p>\n",

		"at the ~~end~~\n",
		"<p>at the <del>end</del></p>\n",

		"~~try two~~ in ~~one line~~\n",
		"<p><del>try two</del> in <del>one line</del></p>\n",

		"over ~~two\nlines~~ test\n",
		"<p>over <del>two\nlines</del> test</p>\n",

		"odd ~~number of~~ markers~~ here\n",
		"<p>odd <del>number of</del> markers~~ here</p>\n",

		"odd ~~number\nof~~ markers~~ here\n",
		"<p>odd <del>number\nof</del> markers~~ here</p>\n",
	}
	doTests(t, tests)
}

func TestCodeSpan(t *testing.T) {
	var tests = []string{
		"`source code`\n",
		"<p><code>source code</code></p>\n",

		"` source code with spaces `\n",
		"<p><code>source code with spaces</code></p>\n",

		"` source code with spaces `not here\n",
		"<p><code>source code with spaces</code>not here</p>\n",

		"a `single marker\n",
		"<p>a `single marker</p>\n",

		"a single multi-tick marker with ``` no text\n",
		"<p>a single multi-tick marker with ``` no text</p>\n",

		"markers with ` ` a space\n",
		"<p>markers with <code></code> a space</p>\n",

		"`source code` and a `stray\n",
		"<p><code>source code</code> and a `stray</p>\n",

		"`source *with* _awkward characters_ in it`\n",
		"<p><code>source *with* _awkward characters_ in it</code></p>\n",

		"`split over\ntwo lines`\n",
		"<p><code>split over\ntwo lines</code></p>\n",

		"```multiple ticks``` for the marker\n",
		"<p><code>multiple ticks</code> for the marker</p>\n",

		"```multiple ticks `with` ticks inside```\n",
		"<p><code>multiple ticks `with` ticks inside</code></p>\n",
	}
	doTests(t, tests)
}

func TestLineBreak(t *testing.T) {
	var tests = []string{
		"this line  \nhas a break\n",
		"<p>this line<br />\nhas a break</p>\n",

		"this line \ndoes not\n",
		"<p>this line \ndoes not</p>\n",

		"this has an   \nextra space\n",
		"<p>this has an<br />\nextra space</p>\n",
	}
	doTests(t, tests)
}