Add support for hard break escape

2 files changed, 172 insertions, 6 deletions

diff --git a/tests/character_escape.rs b/tests/character_escape.rs
index aae0b58..c81760d 100644
--- a/tests/character_escape.rs
+++ b/tests/character_escape.rs
@@ -30,12 +30,11 @@ fn character_escape() {
         "should escape other constructs"
     );
 
-    // To do: hard break.
-    // assert_eq!(
-    //     micromark("foo\\\nbar"),
-    //     "<p>foo<br />\nbar</p>",
-    //     "should escape a line break"
-    // );
+    assert_eq!(
+        micromark("foo\\\nbar"),
+        "<p>foo<br />\nbar</p>",
+        "should escape a line break"
+    );
 
     assert_eq!(
         micromark("`` \\[\\` ``"),
diff --git a/tests/hard_break_escape.rs b/tests/hard_break_escape.rs
new file mode 100644
index 0000000..fe4c82b
--- /dev/null
+++ b/tests/hard_break_escape.rs
@@ -0,0 +1,167 @@
+extern crate micromark;
+use micromark::{micromark};
+
+#[test]
+fn hard_break_escape() {
+    // To do: trailing.
+    // assert_eq!(
+    //     micromark("foo  \nbaz"),
+    //     "<p>foo<br />\nbaz</p>",
+    //     "should support two trailing spaces to form a hard break"
+    // );
+
+    assert_eq!(
+        micromark("foo\\\nbaz"),
+        "<p>foo<br />\nbaz</p>",
+        "should support a backslash to form a hard break"
+    );
+
+    // To do: trailing.
+    // assert_eq!(
+    //     micromark("foo       \nbaz"),
+    //     "<p>foo<br />\nbaz</p>",
+    //     "should support multiple trailing spaces"
+    // );
+
+    // To do: trailing.
+    // assert_eq!(
+    //     micromark("foo  \n     bar"),
+    //     "<p>foo<br />\nbar</p>",
+    //     "should support leading spaces after a trailing hard break"
+    // );
+
+    // To do: trim paragraph whitespace.
+    // assert_eq!(
+    //     micromark("foo\\\n     bar"),
+    //     "<p>foo<br />\nbar</p>",
+    //     "should support leading spaces after an escape hard break"
+    // );
+
+    // To do: trailing, attention.
+    // assert_eq!(
+    //     micromark("*foo  \nbar*"),
+    //     "<p><em>foo<br />\nbar</em></p>",
+    //     "should support trailing hard breaks in emphasis"
+    // );
+
+    // To do: attention.
+    // assert_eq!(
+    //     micromark("*foo\\\nbar*"),
+    //     "<p><em>foo<br />\nbar</em></p>",
+    //     "should support escape hard breaks in emphasis"
+    // );
+
+    assert_eq!(
+        micromark("`code  \ntext`"),
+        "<p><code>code   text</code></p>",
+        "should not support trailing hard breaks in code"
+    );
+
+    assert_eq!(
+        micromark("``code\\\ntext``"),
+        "<p><code>code\\ text</code></p>",
+        "should not support escape hard breaks in code"
+    );
+
+    // To do: paragraph trimming.
+    // assert_eq!(
+    //     micromark("foo  "),
+    //     "<p>foo</p>",
+    //     "should not support trailing hard breaks at the end of a paragraph"
+    // );
+
+    assert_eq!(
+        micromark("foo\\"),
+        "<p>foo\\</p>",
+        "should not support escape hard breaks at the end of a paragraph"
+    );
+
+    assert_eq!(
+        micromark("### foo\\"),
+        "<h3>foo\\</h3>",
+        "should not support escape hard breaks at the end of a heading"
+    );
+
+    assert_eq!(
+        micromark("### foo  "),
+        "<h3>foo</h3>",
+        "should not support trailing hard breaks at the end of a heading"
+    );
+
+    // To do: paragraph trimming.
+    // assert_eq!(
+    //     micromark("aaa  \t\nbb"),
+    //     "<p>aaa\nbb</p>",
+    //     "should support a mixed line suffix (1)"
+    // );
+
+    // To do: paragraph trimming.
+    // assert_eq!(
+    //     micromark("aaa\t  \nbb"),
+    //     "<p>aaa\nbb</p>",
+    //     "should support a mixed line suffix (2)"
+    // );
+
+    // To do: paragraph trimming.
+    // assert_eq!(
+    //     micromark("aaa  \t  \nbb"),
+    //     "<p>aaa\nbb</p>",
+    //     "should support a mixed line suffix (3)"
+    // );
+
+    // To do: trailing.
+    // assert_eq!(
+    //     micromark("aaa\0  \nbb"),
+    //     "<p>aaa�<br />\nbb</p>",
+    //     "should support a hard break after a replacement character"
+    // );
+
+    // To do: trailing.
+    // assert_eq!(
+    //     micromark("aaa\0\t\nbb"),
+    //     "<p>aaa�\nbb</p>",
+    //     "should support a line suffix after a replacement character"
+    // );
+
+    // To do: attention, trailing.
+    // assert_eq!(
+    //     micromark("*a*  \nbb"),
+    //     "<p><em>a</em><br />\nbb</p>",
+    //     "should support a hard break after a span"
+    // );
+
+    // To do: attention, trailing.
+    // assert_eq!(
+    //     micromark("*a*\t\nbb"),
+    //     "<p><em>a</em>\nbb</p>",
+    //     "should support a line suffix after a span"
+    // );
+
+    // To do: attention, trailing.
+    // assert_eq!(
+    //     micromark("*a*  \t\nbb"),
+    //     "<p><em>a</em>\nbb</p>",
+    //     "should support a mixed line suffix after a span (1)"
+    // );
+
+    // To do: attention, trailing.
+    // assert_eq!(
+    //     micromark("*a*\t  \nbb"),
+    //     "<p><em>a</em>\nbb</p>",
+    //     "should support a mixed line suffix after a span (2)"
+    // );
+
+    // To do: attention, trailing.
+    // assert_eq!(
+    //     micromark("*a*  \t  \nbb"),
+    //     "<p><em>a</em>\nbb</p>",
+    //     "should support a mixed line suffix after a span (3)"
+    // );
+
+    // // To do: turning off things.
+    // assert_eq!(
+    //   micromark("a\\\nb", {extensions: [{disable: {null: ["hardBreakEscape"]}}]}),
+    //   "<p>a\\\nb</p>",
+    //   "should support turning off hard break (escape)"
+    // );
+}