[gjs] Add explicit tests of JS version functionality

[Colin Walters <walters src gnome org>]

commit c257bbeb573ed49d24327b7ecdf8ffb773e42e71
Author: Colin Walters <walters verbum org>
Date:   Sat Dec 4 18:04:56 2010 -0500

    Add explicit tests of JS version functionality
    
    https://bugzilla.gnome.org/show_bug.cgi?id=636652

 Makefile-test.am         |    2 +
 test/js/testJS1_8.js     |   54 ++++++++++++++++++++++++++++++++++++++++++++++
 test/js/testJSDefault.js |   14 ++++++++++++
 3 files changed, 70 insertions(+), 0 deletions(-)
---
diff --git a/Makefile-test.am b/Makefile-test.am
index 78a03af..dcb814a 100644
--- a/Makefile-test.am
+++ b/Makefile-test.am
@@ -180,6 +180,8 @@ EXTRA_DIST +=					\
 	test/js/testGI.js			\
 	test/js/testGIMarshalling.js		\
 	test/js/testImporter.js			\
+	test/js/testJS1_8.js			\
+	test/js/testJSDefault.js		\
 	test/js/testLang.js			\
 	test/js/testLocale.js			\
 	test/js/testMainloop.js			\
diff --git a/test/js/testJS1_8.js b/test/js/testJS1_8.js
new file mode 100644
index 0000000..29c83c7
--- /dev/null
+++ b/test/js/testJS1_8.js
@@ -0,0 +1,54 @@
+// application/javascript;version=1.8
+
+// Test SpiderMonkey JS extensions; see
+// https://developer.mozilla.org/en/JavaScript/New_in_JavaScript/1.8
+
+// "const"
+const GLib = imports.gi.GLib;
+
+function testLet() {
+    // "let"
+    let foo = "bar";
+    let cow = "moo";
+
+    assertEquals(foo, "bar");
+}
+
+function testMultiReturn() {
+    const GLib = imports.gi.GLib;
+
+    // "destructuring bind"
+    let [success, content, len] = GLib.file_get_contents('/etc/passwd')
+    assertEquals(success, true);
+}
+
+function testYield() {
+    function fib() {
+	var i = 0, j = 1;
+	while (true) {
+	    yield i;
+	    var t = i;
+	    i = j;
+	    j += t;
+	}
+    }
+
+    var v = [];
+    var g = fib();
+    for (var i = 0; i < 10; i++) {
+	v.push(g.next());
+    }
+
+    assertEquals(v[0], 0);
+    assertEquals(v[1], 1);
+    assertEquals(v[2], 1);
+    assertEquals(v[3], 2);
+    assertEquals(v[4], 3);
+    assertEquals(v[5], 5);
+    assertEquals(v[6], 8);
+    assertEquals(v[7], 13);
+    assertEquals(v[8], 21);
+    assertEquals(v[9], 34);
+}
+
+gjstestRun();
diff --git a/test/js/testJSDefault.js b/test/js/testJSDefault.js
new file mode 100644
index 0000000..8231e0f
--- /dev/null
+++ b/test/js/testJSDefault.js
@@ -0,0 +1,14 @@
+// Test that we *don't* get SpiderMonkey extensions; see
+// testJS1_8.js.
+
+var GLib = imports.gi.GLib;
+
+function testLet() {
+    assertRaises('missing ; before statement', function () { eval("let result = 1+1; result;") });
+}
+
+function testYield() {
+    assertRaises('missing ; before statement', function() { eval("function foo () { yield 42; }; foo();"); });
+}
+
+gjstestRun();