D16521.id39760.diff
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	diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
	--- a/src/__phutil_library_map__.php
	+++ b/src/__phutil_library_map__.php
	@@ -137,6 +137,7 @@
	'PhutilCalendarEventNode' => 'parser/calendar/data/PhutilCalendarEventNode.php',
	'PhutilCalendarNode' => 'parser/calendar/data/PhutilCalendarNode.php',
	'PhutilCalendarRawNode' => 'parser/calendar/data/PhutilCalendarRawNode.php',
	+ 'PhutilCalendarRootNode' => 'parser/calendar/data/PhutilCalendarRootNode.php',
	'PhutilCallbackFilterIterator' => 'utils/PhutilCallbackFilterIterator.php',
	'PhutilCallbackSignalHandler' => 'future/exec/PhutilCallbackSignalHandler.php',
	'PhutilChannel' => 'channel/PhutilChannel.php',
	@@ -228,6 +229,7 @@
	'PhutilHgsprintfTestCase' => 'xsprintf/__tests__/PhutilHgsprintfTestCase.php',
	'PhutilHighIntensityIntervalDaemon' => 'daemon/torture/PhutilHighIntensityIntervalDaemon.php',
	'PhutilICSParser' => 'parser/calendar/ics/PhutilICSParser.php',
	+ 'PhutilICSParserException' => 'parser/calendar/ics/PhutilICSParserException.php',
	'PhutilICSParserTestCase' => 'parser/calendar/ics/__tests__/PhutilICSParserTestCase.php',
	'PhutilINIParserException' => 'parser/exception/PhutilINIParserException.php',
	'PhutilIPAddress' => 'ip/PhutilIPAddress.php',
	@@ -710,7 +712,8 @@
	'PhutilCalendarDocumentNode' => 'PhutilCalendarContainerNode',
	'PhutilCalendarEventNode' => 'PhutilCalendarNode',
	'PhutilCalendarNode' => 'Phobject',
	- 'PhutilCalendarRawNode' => 'PhutilCalendarNode',
	+ 'PhutilCalendarRawNode' => 'PhutilCalendarContainerNode',
	+ 'PhutilCalendarRootNode' => 'PhutilCalendarContainerNode',
	'PhutilCallbackFilterIterator' => 'FilterIterator',
	'PhutilCallbackSignalHandler' => 'PhutilSignalHandler',
	'PhutilChannel' => 'Phobject',
	@@ -808,6 +811,7 @@
	'PhutilHgsprintfTestCase' => 'PhutilTestCase',
	'PhutilHighIntensityIntervalDaemon' => 'PhutilTortureTestDaemon',
	'PhutilICSParser' => 'Phobject',
	+ 'PhutilICSParserException' => 'Exception',
	'PhutilICSParserTestCase' => 'PhutilTestCase',
	'PhutilINIParserException' => 'Exception',
	'PhutilIPAddress' => 'Phobject',
	diff --git a/src/parser/calendar/data/PhutilCalendarRawNode.php b/src/parser/calendar/data/PhutilCalendarRawNode.php
	--- a/src/parser/calendar/data/PhutilCalendarRawNode.php
	+++ b/src/parser/calendar/data/PhutilCalendarRawNode.php
	@@ -1,7 +1,7 @@
	<?php

	final class PhutilCalendarRawNode
	- extends PhutilCalendarNode {
	+ extends PhutilCalendarContainerNode {

	const NODETYPE = 'raw';

	diff --git a/src/parser/calendar/data/PhutilCalendarRootNode.php b/src/parser/calendar/data/PhutilCalendarRootNode.php
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/data/PhutilCalendarRootNode.php
	@@ -0,0 +1,12 @@
	+<?php
	+
	+final class PhutilCalendarRootNode
	+ extends PhutilCalendarContainerNode {
	+
	+ const NODETYPE = 'root';
	+
	+ public function getDocuments() {
	+ return $this->getChildrenOfType(PhutilCalendarDocumentNode::NODETYPE);
	+ }
	+
	+}
	diff --git a/src/parser/calendar/ics/PhutilICSParser.php b/src/parser/calendar/ics/PhutilICSParser.php
	--- a/src/parser/calendar/ics/PhutilICSParser.php
	+++ b/src/parser/calendar/ics/PhutilICSParser.php
	@@ -5,42 +5,67 @@
	private $stack;
	private $node;
	private $document;
	+ private $lines;
	+ private $cursor;
	+
	+ const PARSE_MISSING_END = 'missing-end';
	+ const PARSE_INITIAL_UNFOLD = 'initial-unfold';
	+ const PARSE_UNEXPECTED_CHILD = 'unexpected-child';
	+ const PARSE_EXTRA_END = 'extra-end';
	+ const PARSE_MISMATCHED_SECTIONS = 'mismatched-sections';
	+ const PARSE_ROOT_PROPERTY = 'root-property';
	+ const PARSE_BAD_BASE64 = 'bad-base64';
	+ const PARSE_BAD_BOOLEAN = 'bad-boolean';
	+ const PARSE_UNEXPECTED_TEXT = 'unexpected-text';
	+ const PARSE_MALFORMED_DOUBLE_QUOTE = 'malformed-double-quote';
	+ const PARSE_MALFORMED_PARAMETER_NAME = 'malformed-parameter';
	+ const PARSE_MALFORMED_PROPERTY = 'malformed-property';
	+ const PARSE_MISSING_VALUE = 'missing-value';
	+ const PARSE_UNESCAPED_BACKSLASH = 'unescaped-backslash';

	public function parseICSData($data) {
	$this->stack = array();
	$this->node = null;
	- $this->document = null;
	+ $this->cursor = null;

	$lines = $this->unfoldICSLines($data);
	+ $this->lines = $lines;

	- foreach ($lines as $line) {
	+ $root = $this->newICSNode('<ROOT>');
	+ $this->stack[] = $root;
	+ $this->node = $root;
	+
	+ foreach ($lines as $key => $line) {
	+ $this->cursor = $key;
	$matches = null;
	if (preg_match('(^BEGIN:(.*)\z)', $line, $matches)) {
	$this->beginParsingNode($matches[1]);
	} else if (preg_match('(^END:(.*)\z)', $line, $matches)) {
	$this->endParsingNode($matches[1]);
	} else {
	+ if (count($this->stack) < 2) {
	+ $this->raiseParseFailure(
	+ self::PARSE_ROOT_PROPERTY,
	+ pht(
	+ 'Found unexpected property at ICS document root.'));
	+ }
	$this->parseICSProperty($line);
	}
	}

	- if (!$this->document) {
	- $this->raiseParseFailure(
	- pht(
	- 'Expected ICS document to define a "VCALENDAR" section.'));
	- }
	-
	- if ($this->stack) {
	+ if (count($this->stack) > 1) {
	$this->raiseParseFailure(
	+ self::PARSE_MISSING_END,
	pht(
	'Expected all "BEGIN:" sections in ICS document to have '.
	'corresponding "END:" sections.'));
	}

	- $document = $this->document;
	- $this->document = null;
	+ $this->node = null;
	+ $this->lines = null;
	+ $this->cursor = null;

	- return $document;
	+ return $root;
	}

	private function getNode() {
	@@ -49,22 +74,25 @@

	private function unfoldICSLines($data) {
	$lines = phutil_split_lines($data, $retain_endings = false);
	+ $this->lines = $lines;

	// ICS files are wrapped at 75 characters, with overlong lines continued
	// on the following line with an initial space or tab. Unwrap all of the
	// lines in the file.
	$last = null;
	foreach ($lines as $idx => $line) {
	+ $this->cursor = $idx;
	if (!preg_match('/^[ \t]/', $line)) {
	$last = $idx;
	continue;
	}

	if ($last === null) {
	- throw new Exception(
	+ $this->raiseParseFailure(
	+ self::PARSE_INITIAL_UNFOLD,
	pht(
	'First line of ICS file begins with a space or tab, but this '.
	- 'marks a continuation line.'));
	+ 'marks a line which should be unfolded.'));
	}

	$lines[$last] = $lines[$last].substr($line, 1);
	@@ -78,31 +106,15 @@
	$node = $this->getNode();
	$new_node = $this->newICSNode($type);

	- if ($node) {
	- if ($node instanceof PhutilCalendarContainerNode) {
	- $node->appendChild($new_node);
	- } else {
	- $this->raiseParseFailure(
	- pht(
	- 'Found unexpected node "%s" inside node "%s".',
	- $new_node->getAttribute('ics.type'),
	- $node->getAttribute('ics.type')));
	- }
	+ if ($node instanceof PhutilCalendarContainerNode) {
	+ $node->appendChild($new_node);
	} else {
	- if ($new_node instanceof PhutilCalendarDocumentNode) {
	- if ($this->document) {
	- $this->raiseParseFailure(
	- pht(
	- 'Found multiple "VCALENDAR" nodes in ICS document, '.
	- 'expected only one.'));
	- } else {
	- $this->document = $new_node;
	- }
	- } else {
	- $this->raiseParseFailure(
	- pht(
	- 'Expected ICS document to begin "BEGIN:VCALENDAR".'));
	- }
	+ $this->raiseParseFailure(
	+ self::PARSE_UNEXPECTED_CHILD,
	+ pht(
	+ 'Found unexpected node "%s" inside node "%s".',
	+ $new_node->getAttribute('ics.type'),
	+ $node->getAttribute('ics.type')));
	}

	$this->stack[] = $new_node;
	@@ -113,6 +125,9 @@

	private function newICSNode($type) {
	switch ($type) {
	+ case '<ROOT>':
	+ $node = new PhutilCalendarRootNode();
	+ break;
	case 'VCALENDAR':
	$node = new PhutilCalendarDocumentNode();
	break;
	@@ -131,8 +146,9 @@

	private function endParsingNode($type) {
	$node = $this->getNode();
	- if (!$node) {
	+ if ($node instanceof PhutilCalendarRootNode) {
	$this->raiseParseFailure(
	+ self::PARSE_EXTRA_END,
	pht(
	'Found unexpected "END" without a "BEGIN".'));
	}
	@@ -140,6 +156,7 @@
	$old_type = $node->getAttribute('ics.type');
	if ($old_type != $type) {
	$this->raiseParseFailure(
	+ self::PARSE_MISMATCHED_SECTIONS,
	pht(
	'Found mismatched "BEGIN" ("%s") and "END" ("%s") sections.',
	$old_type,
	@@ -147,11 +164,7 @@
	}

	array_pop($this->stack);
	- if ($this->stack) {
	- $this->node = last($this->stack);
	- } else {
	- $this->node = null;
	- }
	+ $this->node = last($this->stack);

	return $this;
	}
	@@ -163,12 +176,12 @@
	// by either a ";" (to begin a list of parameters) or a ":" (to begin
	// the actual field body).

	- $ok = preg_match('(^([^;:]+)([;:])(.*)\z)', $line, $matches);
	+ $ok = preg_match('(^([A-Za-z0-9-]+)([;:])(.*)\z)', $line, $matches);
	if (!$ok) {
	$this->raiseParseFailure(
	+ self::PARSE_MALFORMED_PROPERTY,
	pht(
	- 'Found malformed line in ICS document: %s',
	- $line));
	+ 'Found malformed property in ICS document.'));
	}

	$name = $matches[1];
	@@ -185,6 +198,7 @@
	$ok = preg_match('(^([^=]+)=)', $body, $matches);
	if (!$ok) {
	$this->raiseParseFailure(
	+ self::PARSE_MALFORMED_PARAMETER_NAME,
	pht(
	'Found malformed property in ICS document: %s',
	$body));
	@@ -206,24 +220,17 @@
	$matches);
	if (!$ok) {
	$this->raiseParseFailure(
	+ self::PARSE_MALFORMED_DOUBLE_QUOTE,
	pht(
	'Found malformed double-quoted string in ICS document '.
	- 'parameter value: %s',
	- $body));
	+ 'parameter value.'));
	}
	} else {
	$is_quoted = false;
	- $ok = preg_match(
	- '(^([^\x00-\x08\x10-\x19";:,]*))',
	- $body,
	- $matches);
	- if (!$ok) {
	- $this->raiseParseFailure(
	- pht(
	- 'Found malformed unquoted string in ICS document '.
	- 'parameter value: %s',
	- $body));
	- }
	+
	+ // It's impossible for this not to match since it can match
	+ // nothing, and it's valid for it to match nothing.
	+ preg_match('(^([^\x00-\x08\x10-\x19";:,]*))', $body, $matches);
	}

	// NOTE: RFC5545 says "Property parameter values that are not in
	@@ -239,6 +246,7 @@
	$body = substr($body, strlen($matches[0]));
	if (!strlen($body)) {
	$this->raiseParseFailure(
	+ self::PARSE_MISSING_VALUE,
	pht(
	'Expected ":" after parameters in ICS document property.'));
	}
	@@ -250,17 +258,27 @@
	continue;
	}

	+ // If we have a semicolon, we're going to read another parameter.
	+ if ($body[0] == ';') {
	+ break;
	+ }
	+
	// If we have a colon, this is the last value and also the last
	// property. Break, then handle the colon below.
	if ($body[0] == ':') {
	break;
	}

	+ $short_body = id(new PhutilUTF8StringTruncator())
	+ ->setMaximumGlyphs(32)
	+ ->truncateString($body);
	+
	// We aren't expecting anything else.
	$this->raiseParseFailure(
	+ self::PARSE_UNEXPECTED_TEXT,
	pht(
	- 'Found unexpected text after reading parameter value: %s',
	- $body));
	+ 'Found unexpected text ("%s") after reading parameter value.',
	+ $short_body));
	}

	$parameters[] = array(
	@@ -268,6 +286,11 @@
	'values' => $param_values,
	);

	+ if ($body[0] == ';') {
	+ $body = substr($body, 1);
	+ continue;
	+ }
	+
	if ($body[0] == ':') {
	$body = substr($body, 1);
	break;
	@@ -278,6 +301,7 @@
	$value = $this->unescapeFieldValue($name, $parameters, $body);

	$node = $this->getNode();
	+
	$raw = $node->getAttribute('ics.properties', array());
	$raw[] = array(
	'name' => $name,
	@@ -409,9 +433,10 @@

	switch ($value_type) {
	case 'BINARY':
	- $result = base64_decode($data);
	+ $result = base64_decode($data, true);
	if ($result === false) {
	$this->raiseParseFailure(
	+ self::PARSE_BAD_BASE64,
	pht(
	'Unable to decode base64 data: %s',
	$data));
	@@ -425,6 +450,7 @@
	$result = phutil_utf8_strtolower($data);
	if (!isset($map[$result])) {
	$this->raiseParseFailure(
	+ self::PARSE_BAD_BOOLEAN,
	pht(
	'Unexpected BOOLEAN value "%s".',
	$data));
	@@ -517,7 +543,8 @@
	}

	if ($esc) {
	- $this->raiseParsFailure(
	+ $this->raiseParseFailure(
	+ self::PARSE_UNESCAPED_BACKSLASH,
	pht(
	'ICS document contains TEXT value ending with unescaped '.
	'backslash.'));
	@@ -528,8 +555,21 @@
	return $result;
	}

	- private function raiseParseFailure($message) {
	- throw new Exception($message);
	+ private function raiseParseFailure($code, $message) {
	+ if ($this->lines && isset($this->lines[$this->cursor])) {
	+ $message = pht(
	+ "ICS Parse Error near line %s:\n\n>>> %s\n\n%s",
	+ $this->cursor + 1,
	+ $this->lines[$this->cursor],
	+ $message);
	+ } else {
	+ $message = pht(
	+ 'ICS Parse Error: %s',
	+ $message);
	+ }
	+
	+ throw id(new PhutilICSParserException($message))
	+ ->setParserFailureCode($code);
	}

	}
	diff --git a/src/parser/calendar/ics/PhutilICSParserException.php b/src/parser/calendar/ics/PhutilICSParserException.php
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/PhutilICSParserException.php
	@@ -0,0 +1,16 @@
	+<?php
	+
	+final class PhutilICSParserException extends Exception {
	+
	+ private $parserFailureCode;
	+
	+ public function setParserFailureCode($code) {
	+ $this->parserFailureCode = $code;
	+ return $this;
	+ }
	+
	+ public function getParserFailureCode() {
	+ return $this->parserFailureCode;
	+ }
	+
	+}
	diff --git a/src/parser/calendar/ics/__tests__/PhutilICSParserTestCase.php b/src/parser/calendar/ics/__tests__/PhutilICSParserTestCase.php
	--- a/src/parser/calendar/ics/__tests__/PhutilICSParserTestCase.php
	+++ b/src/parser/calendar/ics/__tests__/PhutilICSParserTestCase.php
	@@ -3,7 +3,11 @@
	final class PhutilICSParserTestCase extends PhutilTestCase {

	public function testICSParser() {
	- $document = $this->parseICSDocument('simple.ics');
	+ $root = $this->parseICSDocument('simple.ics');
	+
	+ $documents = $root->getDocuments();
	+ $this->assertEqual(1, count($documents));
	+ $document = head($documents);

	$events = $document->getEvents();
	$this->assertEqual(1, count($events));
	@@ -69,6 +73,68 @@
	$event->getAttribute('ics.properties'));
	}

	+ public function testICSParserErrors() {
	+ $map = array(
	+ 'err-missing-end.ics' => PhutilICSParser::PARSE_MISSING_END,
	+ 'err-bad-base64.ics' => PhutilICSParser::PARSE_BAD_BASE64,
	+ 'err-bad-boolean.ics' => PhutilICSParser::PARSE_BAD_BOOLEAN,
	+ 'err-extra-end.ics' => PhutilICSParser::PARSE_EXTRA_END,
	+ 'err-initial-unfold.ics' => PhutilICSParser::PARSE_INITIAL_UNFOLD,
	+ 'err-malformed-double-quote.ics' =>
	+ PhutilICSParser::PARSE_MALFORMED_DOUBLE_QUOTE,
	+ 'err-malformed-parameter.ics' =>
	+ PhutilICSParser::PARSE_MALFORMED_PARAMETER_NAME,
	+ 'err-malformed-property.ics' =>
	+ PhutilICSParser::PARSE_MALFORMED_PROPERTY,
	+ 'err-missing-value.ics' => PhutilICSParser::PARSE_MISSING_VALUE,
	+ 'err-mixmatched-sections.ics' =>
	+ PhutilICSParser::PARSE_MISMATCHED_SECTIONS,
	+ 'err-root-property.ics' => PhutilICSParser::PARSE_ROOT_PROPERTY,
	+ 'err-unescaped-backslash.ics' =>
	+ PhutilICSParser::PARSE_UNESCAPED_BACKSLASH,
	+ 'err-unexpected-child.ics' => PhutilICSParser::PARSE_UNEXPECTED_CHILD,
	+ 'err-unexpected-text.ics' => PhutilICSParser::PARSE_UNEXPECTED_TEXT,
	+
	+ 'simple.ics' => null,
	+ 'good-boolean.ics' => null,
	+ 'multiple-vcalendars.ics' => null,
	+ );
	+
	+ foreach ($map as $test_file => $expect) {
	+ $caught = null;
	+ try {
	+ $this->parseICSDocument($test_file);
	+ } catch (PhutilICSParserException $ex) {
	+ $caught = $ex;
	+ }
	+
	+ if ($expect === null) {
	+ $this->assertTrue(
	+ ($caught === null),
	+ pht(
	+ 'Expected no exception parsing "%s", got: %s',
	+ $test_file,
	+ (string)$ex));
	+ } else {
	+ if ($caught) {
	+ $code = $ex->getParserFailureCode();
	+ $explain = pht(
	+ 'Expected one exception parsing "%s", got a different '.
	+ 'one: %s',
	+ $test_file,
	+ (string)$ex);
	+ } else {
	+ $code = null;
	+ $explain = pht(
	+ 'Expected exception parsing "%s", got none.',
	+ $test_file);
	+ }
	+
	+ $this->assertEqual($expect, $code, $explain);
	+ }
	+ }
	+ }
	+
	private function parseICSDocument($name) {
	$path = dirname(__FILE__).'/data/'.$name;
	$data = Filesystem::readFile($path);
	diff --git a/src/parser/calendar/ics/__tests__/data/err-bad-base64.ics b/src/parser/calendar/ics/__tests__/data/err-bad-base64.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-bad-base64.ics
	@@ -0,0 +1,5 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	+DATA;VALUE=BINARY;ENCODING=BASE64:<QUACK! QUACK!>
	+END:VEVENT
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/err-bad-boolean.ics b/src/parser/calendar/ics/__tests__/data/err-bad-boolean.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-bad-boolean.ics
	@@ -0,0 +1,5 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	+DUCK;VALUE=BOOLEAN:QUACK
	+END:VEVENT
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/err-extra-end.ics b/src/parser/calendar/ics/__tests__/data/err-extra-end.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-extra-end.ics
	@@ -0,0 +1 @@
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/err-initial-unfold.ics b/src/parser/calendar/ics/__tests__/data/err-initial-unfold.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-initial-unfold.ics
	@@ -0,0 +1,2 @@
	+ BEGIN:VCALENDAR
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/err-malformed-double-quote.ics b/src/parser/calendar/ics/__tests__/data/err-malformed-double-quote.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-malformed-double-quote.ics
	@@ -0,0 +1,5 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	+A;B="C:D
	+END:VEVENT
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/err-malformed-parameter.ics b/src/parser/calendar/ics/__tests__/data/err-malformed-parameter.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-malformed-parameter.ics
	@@ -0,0 +1,5 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	+A;B:C
	+END:VEVENT
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/err-malformed-property.ics b/src/parser/calendar/ics/__tests__/data/err-malformed-property.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-malformed-property.ics
	@@ -0,0 +1,5 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	+PEANUTBUTTER&JELLY:sandwich
	+END:VEVENT
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/err-missing-end.ics b/src/parser/calendar/ics/__tests__/data/err-missing-end.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-missing-end.ics
	@@ -0,0 +1,2 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	diff --git a/src/parser/calendar/ics/__tests__/data/err-missing-value.ics b/src/parser/calendar/ics/__tests__/data/err-missing-value.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-missing-value.ics
	@@ -0,0 +1,5 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	+TRIANGLE;color=red
	+END:VEVENT
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/err-mixmatched-sections.ics b/src/parser/calendar/ics/__tests__/data/err-mixmatched-sections.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-mixmatched-sections.ics
	@@ -0,0 +1,4 @@
	+BEGIN:A
	+BEGIN:B
	+END:A
	+END:B
	diff --git a/src/parser/calendar/ics/__tests__/data/err-root-property.ics b/src/parser/calendar/ics/__tests__/data/err-root-property.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-root-property.ics
	@@ -0,0 +1 @@
	+NAME:value
	diff --git a/src/parser/calendar/ics/__tests__/data/err-unescaped-backslash.ics b/src/parser/calendar/ics/__tests__/data/err-unescaped-backslash.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-unescaped-backslash.ics
	@@ -0,0 +1,5 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	+STORY:The duck coughed up an unescaped backslash: \
	+END:VEVENT
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/err-unexpected-child.ics b/src/parser/calendar/ics/__tests__/data/err-unexpected-child.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-unexpected-child.ics
	@@ -0,0 +1,6 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	+BEGIN:TEST
	+END:TEST
	+END:VEVENT
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/err-unexpected-text.ics b/src/parser/calendar/ics/__tests__/data/err-unexpected-text.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/err-unexpected-text.ics
	@@ -0,0 +1,5 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	+SQUARE;color=red"
	+END:VEVENT
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/good-boolean.ics b/src/parser/calendar/ics/__tests__/data/good-boolean.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/good-boolean.ics
	@@ -0,0 +1,5 @@
	+BEGIN:VCALENDAR
	+BEGIN:VEVENT
	+DUCK;VALUE=BOOLEAN:TRUE
	+END:VEVENT
	+END:VCALENDAR
	diff --git a/src/parser/calendar/ics/__tests__/data/multiple-vcalendars.ics b/src/parser/calendar/ics/__tests__/data/multiple-vcalendars.ics
	new file mode 100644
	--- /dev/null
	+++ b/src/parser/calendar/ics/__tests__/data/multiple-vcalendars.ics
	@@ -0,0 +1,4 @@
	+BEGIN:VCALENDAR
	+END:VCALENDAR
	+BEGIN:VCALENDAR
	+END:VCALENDAR

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