Make the existing visual test a snapshot unit test.

src/__snapshots__/notcl.test.ts.snap

@@ -0,0 +1,164 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Parsing Notcl Misc Big mess of markup 1`] = `
+[
+  true,
+  [
+    [
+      {
+        "text": "h1",
+      },
+      {
+        "text": ""Hello,",
+      },
+      {
+        "text": "World!"",
+      },
+    ],
+    [
+      {
+        "text": "para",
+      },
+      {
+        "text": "[2",
+      },
+      {
+        "text": "+",
+      },
+      {
+        "text": "2]",
+      },
+    ],
+    [
+      {
+        "text": "block",
+      },
+      {
+        "text": "
+        This is a paragraph of text, with one [b bold] word. Yes, this means there has to be some magic in text processing... <b>this</b> won't work.
+    ",
+      },
+    ],
+    [
+      {
+        "text": "block",
+      },
+      {
+        "text": "-red",
+      },
+      {
+        "text": ""Beware!"",
+      },
+    ],
+    [
+      {
+        "text": "para",
+      },
+      {
+        "text": ""All",
+      },
+      {
+        "text": "text",
+      },
+      {
+        "text": "should",
+      },
+      {
+        "text": "be",
+      },
+      {
+        "text": "quoted,",
+      },
+      {
+        "text": "it's",
+      },
+      {
+        "text": "clearer",
+      },
+      {
+        "text": "that",
+      },
+      {
+        "text": "way.",
+      },
+      {
+        "text": "&",
+      },
+      {
+        "text": "blockquotes",
+      },
+      {
+        "text": "already",
+      },
+      {
+        "text": "should",
+      },
+      {
+        "text": "contain",
+      },
+      {
+        "text": "paragraphs.",
+      },
+      {
+        "text": "(maybe",
+      },
+      {
+        "text": "normalize",
+      },
+      {
+        "text": "nested",
+      },
+      {
+        "text": "paragraphs)"",
+      },
+    ],
+    [
+      {
+        "text": "block",
+      },
+      {
+        "text": "
+        First block
+    ",
+      },
+      {
+        "text": "
+        Second block
+
+        Is this markdown-parsed?
+
+        [button "No we want to render UI" \\\\{noop}]
+    ",
+      },
+      {
+        "text": "
+      Since we want escapes to work, these blocks [i will] be subject to substitutions.
+    ",
+      },
+    ],
+    [
+      {
+        "text": "para",
+      },
+      {
+        "text": "
+      line endings escaped one slash
+
+      not escaped if \\\\
+      two slashes
+
+      escaped with a slash if \\\\ three slashes
+
+      not escaped with two slashes if \\\\\\\\
+      four slashes
+
+      escaped with two slashes if \\\\\\\\ five slashes
+
+      not escaped with three slashes if \\\\\\\\\\\\
+      six slashes
+    ",
+      },
+    ],
+  ],
+]
+`;

src/notcl.test.ts

@@ -88,12 +88,61 @@ b`)
   //   nesting
   //   escapes
   //     {, }, correct newline folding
+  //   no trailing chars
 
   // "Quotes"
+  //   no trailing chars
 
   // Interpolated words
   //    bare
   //    quotes
   //    variables- bare, brace
   //    command subst
+
+  describe("Misc", () => {
+    test("Big mess of markup", () => {
+      expect(
+        parse(String.raw`
+    h1 "Hello, World!"
+    para [2 + 2]
+    block {
+        This is a paragraph of text, with one [b bold] word. Yes, this means there has to be some magic in text processing... <b>this</b> won't work.
+    }
+    block -red "Beware!"
+    para "All text should be quoted, it's clearer that way. & blockquotes already should contain paragraphs. (maybe normalize nested paragraphs)"
+    block {
+        First block
+    } {
+        Second block
+
+        Is this markdown-parsed?
+
+        [button "No we want to render UI" \\{noop}]
+    } {
+      Since we want escapes to work, these blocks [i will] be subject to substitutions.
+    } 
+    # A comment
+    para {
+      line endings escaped\
+      one slash
+
+      not escaped if \\
+      two slashes
+
+      escaped with a slash if \\\
+      three slashes
+
+      not escaped with two slashes if \\\\
+      four slashes
+
+      escaped with two slashes if \\\\\
+      five slashes
+
+      not escaped with three slashes if \\\\\\
+      six slashes
+    }
+  `)
+      ).toMatchSnapshot();
+    });
+  });
 });