chore: import upstream snapshot with attribution

tools/challenge-parser/parser/plugins/utils/get-section.test.js

@@ -0,0 +1,58 @@
+import { describe, beforeAll, it, expect } from 'vitest';
+import isArray from 'lodash/isArray';
+import { root } from 'mdast-builder';
+import find from 'unist-util-find';
+
+import parseFixture from '../../__fixtures__/parse-fixture';
+import { getSection } from './get-section';
+
+describe('getSection', () => {
+  let simpleAst, extraHeadingAst;
+
+  beforeAll(async () => {
+    extraHeadingAst = await parseFixture('with-extra-heading.md');
+    simpleAst = await parseFixture('simple.md');
+  });
+
+  it('should return an array', () => {
+    const actual = getSection(simpleAst, '--hints--');
+    expect(isArray(actual)).toBe(true);
+  });
+
+  it('should return an empty array if the marker is not present', () => {
+    const actual = getSection(simpleAst, '--not-a-marker--');
+    expect(isArray(actual)).toBe(true);
+    expect(actual.length).toBe(0);
+  });
+
+  it('should include any headings without markers', () => {
+    const actual = getSection(extraHeadingAst, '--description--');
+    expect(
+      find(root(actual), {
+        value: 'this should still be inside --description--'
+      })
+    ).not.toBeUndefined();
+  });
+
+  it('should include the rest of the AST if there is no end marker', () => {
+    const actual = getSection(extraHeadingAst, '--solutions--');
+    expect(actual.length > 0).toBe(true);
+    expect(
+      find(root(actual), { value: 'body {\n  background: white;\n}' })
+    ).not.toBeUndefined();
+  });
+
+  it('should ignore a marker if the depth is not correct', () => {
+    const actual = getSection(extraHeadingAst, '--instructions--', 2);
+    expect(actual).toHaveLength(0);
+  });
+
+  it('should match the hints snapshot', () => {
+    const actual = getSection(simpleAst, '--hints--');
+    expect(actual).toMatchSnapshot();
+  });
+  it('should match the instructions snapshot', () => {
+    const actual = getSection(simpleAst, '--instructions--');
+    expect(actual).toMatchSnapshot();
+  });
+});