Fixes #92: implements frontmatter syntax

common/parser.test.ts

@@ -0,0 +1,38 @@
+import { parse } from "./parse_tree.ts";
+import buildMarkdown from "./parser.ts";
+import { 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
+
+Supper`;
+
+const sampleInvalid1 = `---
+name: Zef
+# This is a doc
+
+Supper`;
+
+Deno.test("Test parser", () => {
+  const lang = buildMarkdown([]);
+  let tree = parse(
+    lang,
+    sample1,
+  );
+  // Check if rendering back to text works
+  assertEquals(renderToText(tree), sample1);
+  // console.log("tree", JSON.stringify(tree, null, 2));
+  let node = findNodeOfType(tree, "FrontMatter");
+  assertNotEquals(node, undefined);
+  tree = parse(lang, sampleInvalid1);
+  node = findNodeOfType(tree, "FrontMatter");
+  // console.log("Invalid node", node);
+  assertEquals(node, undefined);
+});