feat: match parser (wip)

reserve/src/config/parseMatch.js

@@ -0,0 +1,11 @@
+'use strict'
+
+module.exports = match => {
+  if (match instanceof RegExp) {
+    return match
+  }
+  if (match && match.re) {
+    return new RegExp(match.re, match.flags)
+  }
+
+}

reserve/src/config/parseMatch.spec.js

@@ -0,0 +1,23 @@
+'use strict'
+const { describe, it } = require('mocha')
+const assert = require('assert')
+const parseMatch = require('./parseMatch')
+
+describe('config/parseMatch', () => {
+  it('keeps regular expression', () => {
+    const re = /whatever/
+    assert.strictEqual(parseMatch(re), re)
+  })
+
+  it('supports { re: "..." } syntax for configuration files', () => {
+    const re = parseMatch({ re: 'whatever' })
+    assert.ok(re instanceof RegExp)
+    assert.strictEqual('a whatever b'.replace(re, 'o'), 'a o b')
+  })
+
+  it('supports { re: "...", flags: "..." } syntax for configuration files', () => {
+    const re = parseMatch({ re: 'a', flags: 'g' })
+    assert.ok(re instanceof RegExp)
+    assert.strictEqual('a whatever b'.replace(re, 'o'), 'o whotever b')
+  })
+})