silverbullet/common/markdown_parser/parser.test.ts

import { parse } from "./parse_tree.ts";
import buildMarkdown from "./parser.ts";
import {
  collectNodesOfType,
  findNodeOfType,
  renderToText,
} from "../../plug-api/lib/tree.ts";
import { assertEquals, assertNotEquals } from "../../test_deps.ts";

const sample1 = `---
type: page
tags:
- hello
- world
---
# This is a doc

Here is a [[wiki link]] and a [[wiki link|alias]].

Supper`;

const sampleInvalid1 = `---
name: Zef
# This is a doc

Supper`;

Deno.test("Test parser", () => {
  const lang = buildMarkdown([]);
  let tree = parse(lang, sample1);
  // console.log("tree", JSON.stringify(tree, null, 2));
  // Check if rendering back to text works
  assertEquals(renderToText(tree), sample1);

  // Find wiki link and wiki link alias
  const links = collectNodesOfType(tree, "WikiLink");
  assertEquals(links.length, 2);
  const nameNode = findNodeOfType(links[0], "WikiLinkPage");
  assertEquals(nameNode?.children![0].text, "wiki link");

  // Check if alias is parsed properly
  const aliasNode = findNodeOfType(links[1], "WikiLinkAlias");
  assertEquals(aliasNode?.children![0].text, "alias");

  // Find frontmatter
  let node = findNodeOfType(tree, "FrontMatter");
  assertNotEquals(node, undefined);
  tree = parse(lang, sampleInvalid1);
  node = findNodeOfType(tree, "FrontMatter");
  // console.log("Invalid node", node);
  assertEquals(node, undefined);
});

const directiveSample = `
Before
<!-- #query page -->
Body line 1

Body line 2
<!-- /query -->
End
`;

const nestedDirectiveExample = `
Before
<!-- #query page -->
1
<!-- #eval 10 * 10 -->
100
<!-- /eval -->
3
<!-- /query -->
End
`;

Deno.test("Test directive parser", () => {
  const lang = buildMarkdown([]);
  let tree = parse(lang, directiveSample);
  // console.log("tree", JSON.stringify(tree, null, 2));
  assertEquals(renderToText(tree), directiveSample);

  tree = parse(lang, nestedDirectiveExample);
  // console.log("tree", JSON.stringify(tree, null, 2));
  assertEquals(renderToText(tree), nestedDirectiveExample);

  const orderByExample = `<!-- #query page order by lastModified -->
  
  <!-- /query -->`;
  tree = parse(lang, orderByExample);
  console.log("Tree", JSON.stringify(tree, null, 2));
});

const inlineAttributeSample = `
Hello there [a link](http://zef.plus) and [age:: 100]
`;

Deno.test("Test inline attribute syntax", () => {
  const lang = buildMarkdown([]);
  const tree = parse(lang, inlineAttributeSample);
  const nameNode = findNodeOfType(tree, "AttributeName");
  assertEquals(nameNode?.children![0].text, "age");
  const valueNode = findNodeOfType(tree, "AttributeValue");
  assertEquals(valueNode?.children![0].text, "100");
});