Add tests for Hashbang comments

test/language/comments/hashbang-encoded-bang.js

@@ -0,0 +1,10 @@
+#\u0021
+/*---
+esid: pending
+description: >
+    Hashbang comments should not be allowed to have encoded characters
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+---*/

test/language/comments/hashbang-encoded-hash.js

@@ -0,0 +1,10 @@
+\u0023!
+/*---
+esid: pending
+description: >
+    Hashbang comments should not be allowed to have encoded characters
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+---*/

test/language/comments/hashbang-encoded-hashbang.js

@@ -0,0 +1,10 @@
+\u0023\u0021
+/*---
+esid: pending
+description: >
+    Hashbang comments should not be allowed to have encoded characters
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+---*/

test/language/comments/hashbang-eval.js

@@ -0,0 +1,10 @@
+/*---
+esid: pending
+description: >
+    Hashbang comments should be available in Script evaluator contexts.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+---*/
+
+assert.sameValue(eval('#!\n'), undefined);

test/language/comments/hashbang-function-body.js

@@ -0,0 +1,14 @@
+/*---
+esid: pending
+description: >
+    Hashbang comments should only be allowed at the start of source texts and should not be allowed within function bodies.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+function fn() {#!
+}

test/language/comments/hashbang-function-constructor.js

@@ -0,0 +1,22 @@
+/*---
+esid: pending
+description: >
+    Hashbang comments should not be allowed in function evaluator contexts.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+---*/
+const AsyncFunction = (async function (){}).constructor;
+const GeneratorFunction = (function *(){}).constructor;
+const AsyncGeneratorFunction = (async function *(){}).constructor;
+for (ctor of [
+  Function,
+  AsyncFunction,
+  GeneratorFunction,
+  AsyncGeneratorFunction,
+]) {
+  assert.throws(SyntaxError, () => ctor('#!\n_',''), `${ctor.name} Call argument`);
+  assert.throws(SyntaxError, () => ctor('#!\n_'), `${ctor.name} Call body`);
+  assert.throws(SyntaxError, () => new ctor('#!\n_',''), `${ctor.name} Construct argument`);
+  assert.throws(SyntaxError, () => new ctor('#!\n_'), `${ctor.name} Construct body`);
+}

test/language/comments/hashbang-module.js

@@ -0,0 +1,10 @@
+#!
+/*---
+esid: pending
+description: >
+    Hashbang comments should be allowed in Modules.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [module]
+---*/

test/language/comments/hashbang-multi-line-comment.js

@@ -0,0 +1,15 @@
+#!/*
+these characters should not be considered within a comment
+*/
+/*---
+esid: pending
+description: >
+    Hashbang comments should not interpret multi-line comments.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/

test/language/comments/hashbang-no-line-separator.js

@@ -0,0 +1,11 @@
+/*---
+esid: pending
+description: >
+    Hashbang comments should not require a newline afterwards
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+---*/
+
+eval('#!');

test/language/comments/hashbang-not-empty.js

@@ -0,0 +1,11 @@
+#! these characters should be treated as a comment
+/*---
+esid: pending
+description: >
+    Hashbang comments should be allowed in Scripts and should not be required to be empty.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+---*/
+

test/language/comments/hashbang-preceding-directive-prologue.js

@@ -0,0 +1,14 @@
+"use strict"
+#!
+/*---
+esid: pending
+description: >
+    Hashbang comments should only be allowed at start of source texts and should not be preceded by DirectivePrologues.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/

test/language/comments/hashbang-preceding-empty-statement.js

@@ -0,0 +1,13 @@
+;#!
+/*---
+esid: pending
+description: >
+    Hashbang comments should only be allowed at the start of source texts and should not be preceded by empty statements.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/

test/language/comments/hashbang-preceding-hashbang.js

@@ -0,0 +1,14 @@
+#!
+#!
+/*---
+esid: pending
+description: >
+    Hashbang comments should only be allowed at the start of source texts and should not be preceded by Hashbang comments.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/

test/language/comments/hashbang-preceding-line-comment.js

@@ -0,0 +1,14 @@
+//
+#!
+/*---
+esid: pending
+description: >
+    Hashbang comments should only be allowed at the start of source texts and should not be preceded by line comments.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/

test/language/comments/hashbang-preceding-multi-line-comment.js

@@ -0,0 +1,14 @@
+/*
+*/#!
+/*---
+esid: pending
+description: >
+    Hashbang comments should only be allowed at the start of source texts and should not be preceded by multi-line comments.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/

test/language/comments/hashbang-preceding-whitespace.js

@@ -0,0 +1,13 @@
+    #!
+/*---
+esid: pending
+description: >
+    Hashbang comments should only be allowed at the start of source texts and should not be preceded by whitespace.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/

test/language/comments/hashbang-statement-block.js

@@ -0,0 +1,15 @@
+/*---
+esid: pending
+description: >
+    Hashbang comments should only be allowed at the start of source texts and should not be allowed within blocks.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+{
+  #!
+}

test/language/comments/hashbang-use-strict.js

@@ -0,0 +1,12 @@
+#!"use strict"
+/*---
+esid: pending
+description: >
+    Hashbang comments should not be interpretted and should not generate DirectivePrologues.
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+---*/
+
+with ({}) {}