feat(challenge-md): Parse solutions from md

tools/challenge-md-parser/solution-to-data.test.js

@@ -0,0 +1,37 @@
+/* global describe it expect beforeEach */
+const mockAST = require('./fixtures/challenge-html-ast.json');
+const solutionToData = require('./solution-to-data');
+
+describe('challengeSeed-to-data plugin', () => {
+  const plugin = solutionToData();
+  let file = { data: {} };
+
+  beforeEach(() => {
+    file = { data: {} };
+  });
+
+  it('returns a function', () => {
+    expect(typeof plugin).toEqual('function');
+  });
+
+  it('adds a `solutions` property to `file.data`', () => {
+    plugin(mockAST, file);
+    expect('solutions' in file.data).toBe(true);
+  });
+
+  it('ensures that the `solutions` property is an array', () => {
+    plugin(mockAST, file);
+    expect(Array.isArray(file.data.solutions)).toBe(true);
+  });
+
+  it('each entry in the `solutions` array is a string', () => {
+    plugin(mockAST, file);
+
+    expect(file.data.solutions.every(el => typeof el === 'string')).toBe(true);
+  });
+
+  it('should have an output to match the snapshot', () => {
+    plugin(mockAST, file);
+    expect(file.data).toMatchSnapshot();
+  });
+});