Function testRule

packages/remark-lint/src/rules/__tests__/utils.mjs:10–35

(
  rule,
  markdown,
  expected,
  vfileOptions = {},
  ruleOptions = {}
)

 * Tests a markdown rule against a markdown string
 */
export const testRule = (
  rule,
  markdown,
  expected,
  vfileOptions = {},
  ruleOptions = {}
) => {
  // Parse the markdown once
  const tree = unified().use(remarkParse).parse(markdown);

  // Create a mock vfile
  const vfile = {
    ...vfileOptions,
    message: mock.fn(),
    messages: [],
  };

  // Execute the rule
  rule(ruleOptions)(tree, vfile, () => {});

  // Assert that the expected messages were reported
  assert.deepEqual(
    vfile.message.mock.calls.map(call => call.arguments[0]),
    expected
  );
};

/**
 * Tests a YAML rule against a YAML string