test(typescript-estree): add missing test for union and intersection (#…

…2999)
typescript-eslint · Feb 5, 2021 · 214b11b · 214b11b
1 parent ee927ee
commit 214b11b
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Showing 4 changed files with 2,091 additions and 2 deletions.
diff --git a/packages/shared-fixtures/fixtures/typescript/basics/union-intersection.src.ts b/packages/shared-fixtures/fixtures/typescript/basics/union-intersection.src.ts
@@ -0,0 +1,9 @@
+let union: number | null | undefined;
+let intersection: number & string;
+let precedence1: number | string & boolean;
+let precedence2: number & string | boolean;
+
+type unionLeading = | number | string;
+type intersectionLeading = | number & string;
+type unionLeadingSingle = | number;
+type intersectionLeadingSingle = & number;
diff --git a/packages/typescript-estree/tests/ast-alignment/fixtures-to-test.ts b/packages/typescript-estree/tests/ast-alignment/fixtures-to-test.ts
@@ -367,13 +367,13 @@ tester.addFixturePatternConfig('typescript/basics', {
     /**
      * [BABEL ERRORED, BUT TS-ESTREE DID NOT]
      * babel hard fails on computed string enum members, but TS doesn't
-     * TODO: report this to babel
+     * https://github.com/babel/babel/issues/12683
      */
     'export-named-enum-computed-string',
     /**
      * Babel: TSTypePredicate includes `:` statement in range
      * ts-estree: TSTypePredicate does not include `:` statement in range
-     * TODO: report this to babel
+     * https://github.com/babel/babel/issues/12676
      */
     'type-assertion-in-arrow-function',
     'type-assertion-in-function',
@@ -395,6 +395,11 @@ tester.addFixturePatternConfig('typescript/basics', {
     'catch-clause-with-invalid-annotation',
     'export-type-star-from',
     'import-type-error',
+    /**
+     * babel does not take into account leading character into union and intersection
+     * https://github.com/babel/babel/pull/12758
+     */
+    'union-intersection',
   ],
   ignoreSourceType: [
     /**

diff --git a/packages/typescript-estree/tests/lib/__snapshots__/semantic-diagnostics-enabled.test.ts.snap b/packages/typescript-estree/tests/lib/__snapshots__/semantic-diagnostics-enabled.test.ts.snap
@@ -2122,6 +2122,8 @@ exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" e
 
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/typed-this.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
 
+exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/union-intersection.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
+
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/unique-symbol.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;
 
 exports[`Parse all fixtures with "errorOnTypeScriptSyntacticAndSemanticIssues" enabled fixtures/typescript/basics/unknown-type-annotation.src 1`] = `"TEST OUTPUT: No semantic or syntactic issues found"`;