1 files changed, 91 insertions, 0 deletions
diff --git a/testing/xpcshell/node-ws/test/subprotocol.test.js b/testing/xpcshell/node-ws/test/subprotocol.test.js
new file mode 100644
index 0000000000..91dd5d69d8
--- /dev/null
+++ b/testing/xpcshell/node-ws/test/subprotocol.test.js
@@ -0,0 +1,91 @@
+'use strict';
+
+const assert = require('assert');
+
+const { parse } = require('../lib/subprotocol');
+
+describe('subprotocol', () => {
+  describe('parse', () => {
+    it('parses a single subprotocol', () => {
+      assert.deepStrictEqual(parse('foo'), new Set(['foo']));
+    });
+
+    it('parses multiple subprotocols', () => {
+      assert.deepStrictEqual(
+        parse('foo,bar,baz'),
+        new Set(['foo', 'bar', 'baz'])
+      );
+    });
+
+    it('ignores the optional white spaces', () => {
+      const header = 'foo , bar\t, \tbaz\t ,  qux\t\t,norf';
+
+      assert.deepStrictEqual(
+        parse(header),
+        new Set(['foo', 'bar', 'baz', 'qux', 'norf'])
+      );
+    });
+
+    it('throws an error if a subprotocol is empty', () => {
+      [
+        [',', 0],
+        ['foo,,', 4],
+        ['foo,  ,', 6]
+      ].forEach((element) => {
+        assert.throws(
+          () => parse(element[0]),
+          new RegExp(
+            `^SyntaxError: Unexpected character at index ${element[1]}$`
+          )
+        );
+      });
+    });
+
+    it('throws an error if a subprotocol is duplicated', () => {
+      ['foo,foo,bar', 'foo,bar,foo'].forEach((header) => {
+        assert.throws(
+          () => parse(header),
+          /^SyntaxError: The "foo" subprotocol is duplicated$/
+        );
+      });
+    });
+
+    it('throws an error if a white space is misplaced', () => {
+      [
+        ['f oo', 2],
+        [' foo', 0]
+      ].forEach((element) => {
+        assert.throws(
+          () => parse(element[0]),
+          new RegExp(
+            `^SyntaxError: Unexpected character at index ${element[1]}$`
+          )
+        );
+      });
+    });
+
+    it('throws an error if a subprotocol contains invalid characters', () => {
+      [
+        ['f@o', 1],
+        ['f\\oo', 1],
+        ['foo,b@r', 5]
+      ].forEach((element) => {
+        assert.throws(
+          () => parse(element[0]),
+          new RegExp(
+            `^SyntaxError: Unexpected character at index ${element[1]}$`
+          )
+        );
+      });
+    });
+
+    it('throws an error if the header value ends prematurely', () => {
+      ['foo ', 'foo, ', 'foo,bar ', 'foo,bar,'].forEach((header) => {
+        assert.throws(
+          () => parse(header),
+          /^SyntaxError: Unexpected end of input$/
+        );
+      });
+    });
+  });
+});