Add more parser test cases (#11923)

* remove unused codes

* refactor: remove unused parseAccessModifier

* refactor: remove redundant async function checks

* refactor: remove redundant class check in checkExport

* add more parser test cases

* Update packages/babel-parser/src/parser/statement.js

Co-authored-by: Brian Ng <bng412@gmail.com>

* chore: add sourceType: unambiguous test

Co-authored-by: Brian Ng <bng412@gmail.com>

packages/babel-parser/src/parser/statement.js

@@ -1258,20 +1258,6 @@ export default class StatementParser extends ExpressionParser {
     return this.finishNode(classBody, "ClassBody");
   }
 
-  // Check grammar production:
-  //   IdentifierName *_opt ClassElementName
-  // It is used in `parsePropertyDefinition` to detect AsyncMethod and Accessors
-  maybeClassModifier(prop: N.ObjectProperty): boolean {
-    return (
-      !prop.computed &&
-      prop.key.type === "Identifier" &&
-      (this.isLiteralPropertyName() ||
-        this.match(tt.bracketL) ||
-        this.match(tt.star) ||
-        this.match(tt.hash))
-    );
-  }
-
   // returns true if the current identifier is a method/field name,
   // false if it is a modifier
   parseClassMemberFromModifier(
@@ -1611,11 +1597,6 @@ export default class StatementParser extends ExpressionParser {
     methodOrProp: N.ClassMethod | N.ClassProperty,
   ): void {}
 
-  // Overridden in typescript.js
-  parseAccessModifier(): ?N.Accessibility {
-    return undefined;
-  }
-
   parseClassPrivateProperty(
     node: N.ClassPrivateProperty,
   ): N.ClassPrivateProperty {
@@ -1784,19 +1765,9 @@ export default class StatementParser extends ExpressionParser {
 
   maybeParseExportDeclaration(node: N.Node): boolean {
     if (this.shouldParseExportDeclaration()) {
-      if (this.isContextual("async")) {
-        const next = this.nextTokenStart();
-
-        // export async;
-        if (!this.isUnparsedContextual(next, "function")) {
-          this.unexpected(next, tt._function);
-        }
-      }
-
       node.specifiers = [];
       node.source = null;
       node.declaration = this.parseExportDeclaration(node);
-
       return true;
     }
     return false;
@@ -1999,16 +1970,11 @@ export default class StatementParser extends ExpressionParser {
     const currentContextDecorators = this.state.decoratorStack[
       this.state.decoratorStack.length - 1
     ];
+    // If node.declaration is a class, it will take all decorators in the current context.
+    // Thus we should throw if we see non-empty decorators here.
     if (currentContextDecorators.length) {
-      const isClass =
-        node.declaration &&
-        (node.declaration.type === "ClassDeclaration" ||
-          node.declaration.type === "ClassExpression");
-      if (!node.declaration || !isClass) {
       throw this.raise(node.start, Errors.UnsupportedDecoratorExport);
     }
-      this.takeDecorators(node.declaration);
-    }
   }
 
   checkDeclaration(node: N.Pattern | N.ObjectProperty): void {

packages/babel-parser/test/expressions/experimental/top-level-await/module/input.js

@@ -0,0 +1,2 @@
+// prettier-ignore
+await +42

packages/babel-parser/test/expressions/experimental/top-level-await/module/options.json

@@ -0,0 +1,3 @@
+{
+  "sourceType": "module"
+}

packages/babel-parser/test/expressions/experimental/top-level-await/module/output.json

@@ -0,0 +1,33 @@
+{
+  "type": "AwaitExpression",
+  "start":19,"end":28,"loc":{"start":{"line":2,"column":0},"end":{"line":2,"column":9}},
+  "argument": {
+    "type": "UnaryExpression",
+    "start":25,"end":28,"loc":{"start":{"line":2,"column":6},"end":{"line":2,"column":9}},
+    "operator": "+",
+    "prefix": true,
+    "argument": {
+      "type": "NumericLiteral",
+      "start":26,"end":28,"loc":{"start":{"line":2,"column":7},"end":{"line":2,"column":9}},
+      "extra": {
+        "rawValue": 42,
+        "raw": "42"
+      },
+      "value": 42
+    }
+  },
+  "leadingComments": [
+    {
+      "type": "CommentLine",
+      "value": " prettier-ignore",
+      "start":0,"end":18,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":18}}
+    }
+  ],
+  "comments": [
+    {
+      "type": "CommentLine",
+      "value": " prettier-ignore",
+      "start":0,"end":18,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":18}}
+    }
+  ]
+}

packages/babel-parser/test/expressions/experimental/top-level-await/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["topLevelAwait"]
+}

packages/babel-parser/test/expressions/experimental/top-level-await/script/input.js

@@ -0,0 +1,2 @@
+// prettier-ignore
+await +42

packages/babel-parser/test/expressions/experimental/top-level-await/script/options.json

@@ -0,0 +1,3 @@
+{
+  "sourceType": "script"
+}

packages/babel-parser/test/expressions/experimental/top-level-await/script/output.json

@@ -0,0 +1,33 @@
+{
+  "type": "BinaryExpression",
+  "start":19,"end":28,"loc":{"start":{"line":2,"column":0},"end":{"line":2,"column":9}},
+  "left": {
+    "type": "Identifier",
+    "start":19,"end":24,"loc":{"start":{"line":2,"column":0},"end":{"line":2,"column":5},"identifierName":"await"},
+    "name": "await"
+  },
+  "operator": "+",
+  "right": {
+    "type": "NumericLiteral",
+    "start":26,"end":28,"loc":{"start":{"line":2,"column":7},"end":{"line":2,"column":9}},
+    "extra": {
+      "rawValue": 42,
+      "raw": "42"
+    },
+    "value": 42
+  },
+  "leadingComments": [
+    {
+      "type": "CommentLine",
+      "value": " prettier-ignore",
+      "start":0,"end":18,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":18}}
+    }
+  ],
+  "comments": [
+    {
+      "type": "CommentLine",
+      "value": " prettier-ignore",
+      "start":0,"end":18,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":18}}
+    }
+  ]
+}

packages/babel-parser/test/expressions/experimental/top-level-await/unambiguous/input.js

@@ -0,0 +1,2 @@
+// prettier-ignore
+await +42

packages/babel-parser/test/expressions/experimental/top-level-await/unambiguous/options.json

@@ -0,0 +1,3 @@
+{
+  "sourceType": "unambiguous"
+}

packages/babel-parser/test/expressions/experimental/top-level-await/unambiguous/output.json

@@ -0,0 +1,33 @@
+{
+  "type": "BinaryExpression",
+  "start":19,"end":28,"loc":{"start":{"line":2,"column":0},"end":{"line":2,"column":9}},
+  "left": {
+    "type": "Identifier",
+    "start":19,"end":24,"loc":{"start":{"line":2,"column":0},"end":{"line":2,"column":5},"identifierName":"await"},
+    "name": "await"
+  },
+  "operator": "+",
+  "right": {
+    "type": "NumericLiteral",
+    "start":26,"end":28,"loc":{"start":{"line":2,"column":7},"end":{"line":2,"column":9}},
+    "extra": {
+      "rawValue": 42,
+      "raw": "42"
+    },
+    "value": 42
+  },
+  "leadingComments": [
+    {
+      "type": "CommentLine",
+      "value": " prettier-ignore",
+      "start":0,"end":18,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":18}}
+    }
+  ],
+  "comments": [
+    {
+      "type": "CommentLine",
+      "value": " prettier-ignore",
+      "start":0,"end":18,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":18}}
+    }
+  ]
+}

packages/babel-parser/test/fixtures/es2015/destructuring/invalid-object-method/input.js

@@ -0,0 +1 @@
+const { foo() {} } = foo();

packages/babel-parser/test/fixtures/es2015/destructuring/invalid-object-method/options.json

@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token (1:11)"
+}

packages/babel-parser/test/fixtures/es2020/export-ns-from/ns-dangling-comma/input.js

@@ -0,0 +1 @@
+export * as foo,

packages/babel-parser/test/fixtures/es2020/export-ns-from/ns-dangling-comma/options.json

@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token, expected \"{\" (1:16)"
+}

packages/babel-parser/test/fixtures/experimental/bind-operator/invalid-non-member-expression/input.js

@@ -0,0 +1 @@
+::a?.b;

packages/babel-parser/test/fixtures/experimental/bind-operator/invalid-non-member-expression/options.json

@@ -0,0 +1,6 @@
+{
+  "plugins": [
+    "functionBind"
+  ],
+  "throws": "Binding should be performed on object property. (1:2)"
+}

packages/babel-parser/test/fixtures/experimental/bind-operator/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["functionBind"]
+}

packages/babel-parser/test/fixtures/experimental/decorators/invalid-decorator-spread-element/input.js

@@ -0,0 +1 @@
+({ @foo ...foo });

packages/babel-parser/test/fixtures/experimental/decorators/invalid-decorator-spread-element/options.json

@@ -0,0 +1,4 @@
+{
+  "plugins": ["decorators-legacy"],
+  "throws": "Unexpected token (1:8)"
+}

packages/babel-parser/test/fixtures/experimental/export-extensions/default-dangling-comma/input.js

@@ -0,0 +1 @@
+export default,

packages/babel-parser/test/fixtures/experimental/export-extensions/default-dangling-comma/options.json

@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token, expected \"{\" (1:15)"
+}

packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-fsharp-invalid-primary-topic/input.js

@@ -0,0 +1 @@
+x |> # + 1

packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-fsharp-invalid-primary-topic/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": [["pipelineOperator", { "proposal": "fsharp" }]]
+}

packages/babel-parser/test/fixtures/experimental/pipeline-operator/proposal-fsharp-invalid-primary-topic/output.json

@@ -0,0 +1,49 @@
+{
+  "type": "File",
+  "start":0,"end":10,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":10}},
+  "errors": [
+    "SyntaxError: Primary Topic Reference found but pipelineOperator not passed 'smart' for 'proposal' option. (1:5)",
+    "SyntaxError: Topic reference was used in a lexical context without topic binding (1:5)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":10,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":10}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":10,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":10}},
+        "expression": {
+          "type": "BinaryExpression",
+          "start":0,"end":10,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":10}},
+          "left": {
+            "type": "Identifier",
+            "start":0,"end":1,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":1},"identifierName":"x"},
+            "name": "x"
+          },
+          "operator": "|>",
+          "right": {
+            "type": "BinaryExpression",
+            "start":5,"end":10,"loc":{"start":{"line":1,"column":5},"end":{"line":1,"column":10}},
+            "left": {
+              "type": "PipelinePrimaryTopicReference",
+              "start":5,"end":6,"loc":{"start":{"line":1,"column":5},"end":{"line":1,"column":6}}
+            },
+            "operator": "+",
+            "right": {
+              "type": "NumericLiteral",
+              "start":9,"end":10,"loc":{"start":{"line":1,"column":9},"end":{"line":1,"column":10}},
+              "extra": {
+                "rawValue": 1,
+                "raw": "1"
+              },
+              "value": 1
+            }
+          }
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/experimental/record-and-tuple/invalid-record-proto/input.js

@@ -0,0 +1 @@
+#{ __proto__: null }

packages/babel-parser/test/fixtures/experimental/record-and-tuple/invalid-record-proto/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": [["recordAndTuple", { "syntaxType": "hash" }]]
+}

packages/babel-parser/test/fixtures/experimental/record-and-tuple/invalid-record-proto/output.json

@@ -0,0 +1,42 @@
+{
+  "type": "File",
+  "start":0,"end":20,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":20}},
+  "errors": [
+    "SyntaxError: '__proto__' is not allowed in Record expressions (1:3)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":20,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":20}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":20,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":20}},
+        "expression": {
+          "type": "RecordExpression",
+          "start":0,"end":20,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":20}},
+          "properties": [
+            {
+              "type": "ObjectProperty",
+              "start":3,"end":18,"loc":{"start":{"line":1,"column":3},"end":{"line":1,"column":18}},
+              "method": false,
+              "key": {
+                "type": "Identifier",
+                "start":3,"end":12,"loc":{"start":{"line":1,"column":3},"end":{"line":1,"column":12},"identifierName":"__proto__"},
+                "name": "__proto__"
+              },
+              "computed": false,
+              "shorthand": false,
+              "value": {
+                "type": "NullLiteral",
+                "start":14,"end":18,"loc":{"start":{"line":1,"column":14},"end":{"line":1,"column":18}}
+              }
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}