Add tests for < and > in wilink titles/template names (#104)

tests/tokenizer/integration.mwtest

@@ -241,3 +241,73 @@ name:   newline_and_comment_in_template_name_7
 label:  a template name containing a newline followed by a comment
 input:  "{{foobar\n<!|key=value}}"
 output: [Text(text="{{foobar\n<!|key=value}}")]
+
+---
+
+name:   tag_in_link_title
+label:  HTML tags are invalid in link titles, even when complete
+input:  "[[foo<i>bar</i>baz]]"
+output: [Text(text="[[foo"), TagOpenOpen(), Text(text="i"), TagCloseOpen(padding=""), Text(text="bar"), TagOpenClose(), Text(text="i"), TagCloseClose(), Text(text="baz]]")]
+
+---
+
+name:   tag_in_template_name
+label:  HTML tags are invalid in template names, even when complete
+input:  "{{foo<i>bar</i>baz}}"
+output: [Text(text="{{foo"), TagOpenOpen(), Text(text="i"), TagCloseOpen(padding=""), Text(text="bar"), TagOpenClose(), Text(text="i"), TagCloseClose(), Text(text="baz}}")]
+
+---
+
+name:   tag_in_link_text
+label:  HTML tags are valid in link text
+input:  "[[foo|<i>bar</i>baz]]"
+output: [WikilinkOpen(), Text(text="foo"), WikilinkSeparator(), TagOpenOpen(), Text(text="i"), TagCloseOpen(padding=""), Text(text="bar"), TagOpenClose(), Text(text="i"), TagCloseClose(), Text(text="baz"), WikilinkClose()]
+
+---
+
+name:   comment_in_link_title
+label:  comments are valid in link titles
+input:  "[[foo<!--bar-->baz]]"
+output: [WikilinkOpen(), Text(text="foo"), CommentStart(), Text(text="bar"), CommentEnd(), Text(text="baz"), WikilinkClose()]
+
+---
+
+name:   incomplete_comment_in_link_title
+label:  incomplete comments are invalid in link titles
+input:  "[[foo<!--bar--baz]]"
+output: [Text(text="[[foo<!--bar--baz]]")]
+
+---
+
+name:   incomplete_comment_in_link_title_2
+label:  incomplete comments are invalid in link titles
+input:  "[[foo<!--barbaz]]"
+output: [Text(text="[[foo<!--barbaz]]")]
+
+---
+
+name:   incomplete_comment_in_link_title_3
+label:  incomplete comments are invalid in link titles
+input:  "[[foo<!barbaz]]"
+output: [Text(text="[[foo<!barbaz]]")]
+
+---
+
+name:   incomplete_comment_in_link_title_4
+label:  incomplete comments are invalid in link titles
+input:  "[[foo<!--]]"
+output: [Text(text="[[foo<!--]]")]
+
+---
+
+name:   incomplete_comment_in_link_title_5
+label:  incomplete comments are invalid in link titles
+input:  "[[foo<!-"
+output: [Text(text="[[foo<!-")]
+
+---
+
+name:   incomplete_comment_in_link_title_6
+label:  incomplete comments are invalid in link titles
+input:  "[[foo<!--bar"
+output: [Text(text="[[foo<!--bar")]

tests/tokenizer/templates.mwtest

@@ -509,6 +509,20 @@ output: [TemplateOpen(), Text(text="foo"), TemplateParamSeparator(), Text(text="
 
 ---
 
+name:   invalid_left_angle_bracket
+label:  invalid template: left angle bracket in name
+input:  "{{foo<bar}}"
+output: [Text(text="{{foo<bar}}")]
+
+---
+
+name:   invalid_right_angle_bracket
+label:  invalid template: right angle bracket in name
+input:  "{{foo>bar}}"
+output: [Text(text="{{foo>bar}}")]
+
+---
+
 name:   incomplete_stub
 label:  incomplete templates that should fail gracefully: just an opening
 input:  "{{"

tests/tokenizer/wikilinks.mwtest

@@ -124,6 +124,34 @@ output: [Text(text="[[foo|"), WikilinkOpen(), Text(text="bar"), WikilinkClose()]
 
 ---
 
+name:   invalid_left_angle_bracket
+label:  invalid wikilink: left angle bracket
+input:  "[[foo<bar]]"
+output: [Text(text="[[foo<bar]]")]
+
+---
+
+name:   invalid_right_angle_bracket
+label:  invalid wikilink: right angle bracket
+input:  "[[foo>bar]]"
+output: [Text(text="[[foo>bar]]")]
+
+---
+
+name:   invalid_newline_at_start
+label:  invalid wikilink: newline at start of title
+input:  "[[\nfoobar]]"
+output: [Text(text="[[\nfoobar]]")]
+
+---
+
+name:   invalid_newline_at_end
+label:  invalid wikilink: newline at end of title
+input:  "[[foobar\n]]"
+output: [Text(text="[[foobar\n]]")]
+
+---
+
 name:   incomplete_open_only
 label:  incomplete wikilinks: just an open
 input:  "[["