add testing script

Author: beardicus

test.js

@@ -0,0 +1,86 @@
+require('tap').mochaGlobals()
+const assert = require('assert')
+const remark = require('remark')
+const frontmatter = require('remark-frontmatter')
+const extract = require('remark-extract-frontmatter')
+const yaml = require('yaml').parse
+const strip = require('strip-markdown')
+const vfile = require('to-vfile')
+const syllable = require('syllable')
+const fs = require('fs')
+
+const dir = './_haikus/'
+const blockList = ['haikus.md']
+
+const files = fs.readdirSync(dir)
+
+files.forEach(async (file) => {
+  if (!blockList.includes(file)) {
+    const [text, meta] = await processMarkdown(dir + file)
+    const lines = text.split('\n').filter((line) => line !== '')
+
+    if (meta.test !== false) {
+      validateHaiku(file, lines, meta)
+    }
+  }
+})
+
+function processMarkdown(filename) {
+  return new Promise((resolve, reject) => {
+    remark()
+      .use(frontmatter)
+      .use(extract, { yaml: yaml })
+      .use(strip)
+      .process(vfile.readSync(filename), (err, file) => {
+        if (err) {
+          reject(err)
+        } else {
+          resolve([file.toString(), file.data])
+        }
+      })
+  })
+}
+
+function validateHaiku(filename, lines, meta) {
+  describe(filename, () => {
+    it("should have a '.md' file extension", () => {
+      assert.ok(/\.md$/.test(filename), "extension does not match '.md'")
+    })
+
+    describe('file metadata', () => {
+      it("should have layout equal to 'haiku'", () => {
+        assert.equal(
+          meta.layout,
+          'haiku',
+          "layout metadata should equal 'haiku'"
+        )
+      })
+
+      it('should have non-blank title', () => {
+        assert.equal(typeof meta.title, 'string', 'title metadata is missing')
+      })
+
+      it('should have non-blank author', () => {
+        assert.equal(typeof meta.author, 'string', 'author metadata is missing')
+      })
+    })
+
+    describe('haiku structure', () => {
+      it('should have three lines', () => {
+        assert.equal(lines.length, 3)
+      })
+
+      it('should have five syllables on the first line', () => {
+        assert.equal(syllable(lines[0]), 5)
+      })
+
+      it('should have seven syllables on the second line', () => {
+        assert.equal(syllable(lines[1]), 7)
+      })
+
+      it('should have five syllables on the third line', () => {
+        assert.equal(syllable(lines[2]), 5)
+      })
+    })
+  })
+}