test: add alignment test for espree & change babel sourceType to unambiguous

package.json

@@ -19,18 +19,20 @@
   "license": "BSD-2-Clause",
   "devDependencies": {
     "@babel/code-frame": "7.0.0",
-    "@babel/parser": "7.1.6",
+    "@babel/parser": "7.2.2",
     "@commitlint/cli": "^7.1.2",
     "@commitlint/config-conventional": "^7.1.2",
     "@commitlint/travis-cli": "^7.1.2",
     "@types/babel-code-frame": "^6.20.1",
+    "@types/estree": "^0.0.39",
     "@types/jest": "^23.3.9",
     "@types/lodash.isplainobject": "^4.0.4",
     "@types/lodash.unescape": "^4.0.4",
     "@types/node": "^10.12.2",
     "@types/semver": "^5.5.0",
     "@types/shelljs": "^0.8.0",
     "cz-conventional-changelog": "2.1.0",
+    "espree": "^5.0.0",
     "glob": "7.1.2",
     "husky": "0.14.3",
     "jest": "23.1.0",

tests/ast-alignment/fixtures-tester.ts

@@ -0,0 +1,99 @@
+import glob from 'glob';
+import fs from 'fs';
+import path from 'path';
+
+export interface CreateFixturePatternConfig {
+  ignoreBabel?: string[];
+  ignoreEspree?: string[];
+  fileType?: string;
+  ignoreSourceType?: string[];
+}
+
+export interface Fixture {
+  filename: string;
+  ignoreSourceType: boolean;
+}
+
+export interface FixturePatternConfig {
+  pattern: string;
+  ignoreSourceType: boolean;
+}
+
+const fixturesDirPath = path.join(__dirname, '../fixtures');
+
+export class FixturesTester {
+  protected babelFixtures: FixturePatternConfig[] = [];
+  protected espreeFixtures: FixturePatternConfig[] = [];
+
+  constructor() {}
+
+  public registerTest(
+    fixturesSubPath: string,
+    config: CreateFixturePatternConfig = {}
+  ) {
+    if (!fs.existsSync(path.join(fixturesDirPath, fixturesSubPath))) {
+      throw new Error(
+        `Registered path '${path.join(
+          __dirname,
+          fixturesSubPath
+        )}' was not found`
+      );
+    }
+
+    const ignoreBabel = config.ignoreBabel || [];
+    const ignoreEspree = config.ignoreEspree || [];
+    const fileType = config.fileType || 'js';
+    const ignoreSourceType = config.ignoreSourceType || [];
+
+    if (fileType === 'js' || fileType === 'jsx') {
+      this.espreeFixtures.push({
+        pattern: `${fixturesSubPath}/!(${ignoreEspree.join(
+          '|'
+        )}).src.${fileType}`,
+        ignoreSourceType: false
+      });
+    }
+
+    /**
+     * https://github.com/babel/babel/issues/9213
+     */
+    if (ignoreSourceType.length) {
+      ignoreBabel.push(...ignoreSourceType);
+      for (const fixture of ignoreSourceType) {
+        this.babelFixtures.push({
+          // It needs to be the full path from within fixtures/ for the pattern
+          pattern: `${fixturesSubPath}/${fixture}.src.${config.fileType}`,
+          ignoreSourceType: true
+        });
+      }
+    }
+
+    this.babelFixtures.push({
+      pattern: `${fixturesSubPath}/!(${ignoreBabel.join('|')}).src.${fileType}`,
+      ignoreSourceType: false
+    });
+  }
+
+  protected processFixtures(fixtures: FixturePatternConfig[]): Fixture[] {
+    return fixtures
+      .map(fixtures => {
+        return glob
+          .sync(`${fixturesDirPath}/${fixtures.pattern}`, {})
+          .map(filename => {
+            return {
+              filename,
+              ignoreSourceType: fixtures.ignoreSourceType
+            };
+          });
+      })
+      .reduce((acc, x) => acc.concat(x), []);
+  }
+
+  public getForBabel(): Fixture[] {
+    return this.processFixtures(this.babelFixtures);
+  }
+
+  public getForEspree(): Fixture[] {
+    return this.processFixtures(this.espreeFixtures);
+  }
+}