- refactor regex handling for the different usecases to allow providing the preferred method

- introduce new `exec` and `execAll` variants which support named groups
- introduce `replaceAll` in addition to `replace`
- update test cases
- cleanup code

__tests__/regexUtils.test.ts

@@ -0,0 +1,57 @@
+import { transformStringToValue, validateRegex } from '../src/pr-collector/regexUtils'
+import { Regex } from '../src/pr-collector/types'
+
+jest.setTimeout(180000)
+
+it('Replace into target', async () => {
+  const regex: Regex = {
+    pattern: '.*(\\[Feature\\]|\\[Issue\\]).*',
+    target: '$1',
+  }
+  const validatedRegex = validateRegex(regex)
+  expect(validateRegex).not.toBeNull()
+  expect(transformStringToValue("[Feature] TEST", validatedRegex!!)).toStrictEqual(`[Feature]`)
+})
+
+it('Replace all into target', async () => {
+  const regex: Regex = {
+    pattern: '.*(\\[Feature\\]|\\[Issue\\]).*',
+    method: 'replaceAll',
+    target: '$1',
+  }
+  const validatedRegex = validateRegex(regex)
+  expect(validateRegex).not.toBeNull()
+  expect(transformStringToValue("[Feature] TEST", validatedRegex!!)).toStrictEqual(`[Feature]`)
+})
+
+it('Match without target', async () => {
+  const regex: Regex = {
+    pattern: '\\[Feature\\]|\\[Issue\\]',
+    method: 'match'
+  }
+  const validatedRegex = validateRegex(regex)
+  expect(validateRegex).not.toBeNull()
+  expect(transformStringToValue("[Feature] TEST", validatedRegex!!)).toStrictEqual(`[Feature]`)
+})
+
+it('Match into target', async () => {
+  const regex: Regex = {
+    pattern: '(?<label>\\[Feature\\]|\\[Issue\\])',
+    method: 'match',
+    target: '$1',
+  }
+  const validatedRegex = validateRegex(regex)
+  expect(validateRegex).not.toBeNull()
+  expect(transformStringToValue("[Feature] TEST", validatedRegex!!)).toStrictEqual(`[Feature]`)
+})
+
+it('Match into named group', async () => {
+  const regex: Regex = {
+    pattern: '(?<label>\\[Feature\\]|\\[Issue\\])',
+    method: 'match',
+    target: 'label',
+  }
+  const validatedRegex = validateRegex(regex)
+  expect(validateRegex).not.toBeNull()
+  expect(transformStringToValue("[Feature] TEST", validatedRegex!!)).toStrictEqual(`[Feature]`)
+})