Function parseMarkdown

demo/src/features/testing.ts:23–55

(
    text: string,
    events: {
      onTest(range: vscode.Range, a: number, operator: string, b: number, expected: number): void
      onHeading(range: vscode.Range, name: string, depth: number): void
    }
  )

  const headingRe = /^(#+)\s*(.+)$/

  const parseMarkdown = (
    text: string,
    events: {
      onTest(range: vscode.Range, a: number, operator: string, b: number, expected: number): void
      onHeading(range: vscode.Range, name: string, depth: number): void
    }
  ): void => {
    const lines = text.split('\n')

    for (let lineNo = 0; lineNo < lines.length; lineNo++) {
      const line = lines[lineNo]!
      const test = testRe.exec(line)
      if (test != null) {
        const [, a, operator, b, expected] = test
        const range = new api.Range(
          new api.Position(lineNo, 0),
          new api.Position(lineNo, test[0].length)
        )
        events.onTest(range, Number(a), operator!, Number(b), Number(expected))
        continue
      }

      const heading = headingRe.exec(line)
      if (heading != null) {
        const [, pounds, name] = heading
        const range = new api.Range(
          new api.Position(lineNo, 0),
          new api.Position(lineNo, line.length)
        )
        events.onHeading(range, name!, pounds!.length)
      }
    }
  }

  const textDecoder = new TextDecoder('utf-8')