Add tests for Import Text proposal

features.txt

@@ -64,6 +64,10 @@ Atomics.pause
 # https://tc39.es/proposal-defer-import-eval
 import-defer
 
+# Import Text
+# https://github.com/tc39/proposal-import-text
+import-text
+
 # Iterator Sequencing
 # https://github.com/tc39/proposal-iterator-sequencing
 iterator-sequencing

test/language/expressions/dynamic-import/import-attributes/2nd-param-with-type-text.js

@@ -0,0 +1,14 @@
+// Copyright (C) 2025 Mozilla Foundation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-create-text-module
+description: Dynamic import of text files
+flags: [async]
+features: [dynamic-import, import-attributes, import-text]
+---*/
+
+import('./2nd-param_FIXTURE.json', { with: { type: 'text' } })
+  .then((module) => {
+    assert.sameValue(module.default, '262\n');
+  })
+  .then($DONE, $DONE);

test/language/import/import-attributes/text-empty.js

@@ -0,0 +1,20 @@
+// Copyright (C) 2025 Mozilla Foundation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-create-text-module
+description: Correctly parses an empty file
+info: |
+  # 16.2.1.8.x CreateTextModule ( source )
+
+  The abstract operation CreateTextModule takes argument source (a String) and
+  returns a normal completion containing a Synthetic Module Record.
+  It performs the following steps when called:
+
+    1. Return CreateDefaultExportSyntheticModule(source).
+flags: [module]
+features: [import-attributes, import-text]
+---*/
+
+import value from './text-valid_FIXTURE' with { type: 'text' };
+
+assert.sameValue(value, '');

test/language/import/import-attributes/text-javascript.js

@@ -0,0 +1,20 @@
+// Copyright (C) 2025 Mozilla Foundation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-create-text-module
+description: Does not parse imported module as JavaScript
+info: |
+  # 16.2.1.8.x CreateTextModule ( source )
+
+  The abstract operation CreateTextModule takes argument source (a String) and
+  returns a normal completion containing a Synthetic Module Record.
+  It performs the following steps when called:
+
+    1. Return CreateDefaultExportSyntheticModule(source).
+flags: [module]
+features: [import-attributes, import-text]
+---*/
+
+import value from './text-javascript_FIXTURE.js' with { type: 'text' };
+
+assert(value.includes('throw "This should not be evaluated."'));

test/language/import/import-attributes/text-javascript_FIXTURE.js

@@ -0,0 +1,4 @@
+// Copyright (C) 2025 Mozilla Foundation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+throw "This should not be evaluated."

test/language/import/import-attributes/text-self.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2025 Mozilla Foundation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-create-text-module
+description: Supports self-referential text imports
+flags: [module]
+features: [import-attributes, import-text]
+---*/
+
+import value from './text-self.js' with { type: 'text' };
+
+assert(value.startsWith('// Copyright (C) 2025 Mozilla Foundation.'));
+assert(
+  value.includes("import value from './text-self.js' with { type: 'text' };")
+);

test/language/import/import-attributes/text-string.js

@@ -0,0 +1,20 @@
+// Copyright (C) 2025 Mozilla Foundation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-create-text-module
+description: Correctly parses a text file
+info: |
+  # 16.2.1.8.x CreateTextModule ( source )
+
+  The abstract operation CreateTextModule takes argument source (a String) and
+  returns a normal completion containing a Synthetic Module Record.
+  It performs the following steps when called:
+
+    1. Return CreateDefaultExportSyntheticModule(source).
+flags: [module]
+features: [import-attributes, import-text]
+---*/
+
+import value from './text-string_FIXTURE' with { type: 'text' };
+
+assert.sameValue(value, 'a string value\n');

test/language/import/import-attributes/text-string_FIXTURE

@@ -0,0 +1 @@
+a string value

test/language/import/import-attributes/text-via-namespace.js

@@ -0,0 +1,13 @@
+// Copyright (C) 2025 Mozilla Foundation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-create-text-module
+description: May be imported via a module namespace object
+flags: [module]
+features: [import-attributes, import-text]
+---*/
+
+import * as ns from './text-via-namespace_FIXTURE' with { type: 'text' };
+
+assert.sameValue(Object.getOwnPropertyNames(ns).length, 1);
+assert.sameValue(ns.default, "262\n");

test/language/import/import-attributes/text-via-namespace_FIXTURE

@@ -0,0 +1 @@
+262