Refactor build helpers (#1826)

* Extract functions into their own files

* Allow injection of exclusion filter to make easier to test

* Make sure we always exclude ourselves

src/support_code_library_builder/build_parameter_type.ts

@@ -0,0 +1,21 @@
+import { ParameterType } from '@cucumber/cucumber-expressions'
+import { IParameterTypeDefinition } from './types'
+
+export function buildParameterType({
+  name,
+  regexp,
+  transformer,
+  useForSnippets,
+  preferForRegexpMatch,
+}: IParameterTypeDefinition<any>): ParameterType<any> {
+  if (typeof useForSnippets !== 'boolean') useForSnippets = true
+  if (typeof preferForRegexpMatch !== 'boolean') preferForRegexpMatch = false
+  return new ParameterType(
+    name,
+    regexp,
+    null,
+    transformer,
+    useForSnippets,
+    preferForRegexpMatch
+  )
+}

src/support_code_library_builder/get_definition_line_and_uri.ts

@@ -0,0 +1,33 @@
+import path from 'path'
+import StackTrace from 'stacktrace-js'
+import { isFileNameInCucumber } from '../stack_trace_filter'
+import { doesHaveValue, valueOrDefault } from '../value_checker'
+import { ILineAndUri } from '../types'
+
+export function getDefinitionLineAndUri(
+  cwd: string,
+  isExcluded = isFileNameInCucumber
+): ILineAndUri {
+  let line: number
+  let uri: string
+  try {
+    const stackframes = StackTrace.getSync()
+    const stackframe = stackframes.find(
+      (frame) =>
+        frame.getFileName() !== __filename && !isExcluded(frame.getFileName())
+    )
+    if (stackframe != null) {
+      line = stackframe.getLineNumber()
+      uri = stackframe.getFileName()
+      if (doesHaveValue(uri)) {
+        uri = path.relative(cwd, uri)
+      }
+    }
+  } catch (e) {
+    console.warn('Warning: unable to get definition line and uri', e)
+  }
+  return {
+    line: valueOrDefault(line, 0),
+    uri: valueOrDefault(uri, 'unknown'),
+  }
+}

src/support_code_library_builder/index.ts

@@ -1,4 +1,5 @@
-import { buildParameterType, getDefinitionLineAndUri } from './build_helpers'
+import { buildParameterType } from './build_parameter_type'
+import { getDefinitionLineAndUri } from './get_definition_line_and_uri'
 import { IdGenerator } from '@cucumber/messages'
 import * as messages from '@cucumber/messages'
 import TestCaseHookDefinition from '../models/test_case_hook_definition'