[gjs: 4/5] print: Define API writable

[Philip Chimento <pchimento src gnome org>]

commit 1677770ca6b01be3ace0e3f31b10cb8eb50b4263
Author: Philip Chimento <philip chimento gmail com>
Date:   Sun Aug 30 16:54:06 2020 -0700

    print: Define API writable
    
    In order to match the GJS_MODULE_PROP_FLAGS that they were previously
    defined with before the split into a separate module, the print
    functions need to be defined with writable: true on the global object.
    
    Without this, `spyOn(globalThis, 'print')` will not work.

 installed-tests/js/meson.build       |  1 +
 installed-tests/js/testPrint.js      | 31 +++++++++++++++++++++++++++++++
 modules/script/_bootstrap/default.js |  4 ++++
 3 files changed, 36 insertions(+)
---
diff --git a/installed-tests/js/meson.build b/installed-tests/js/meson.build
index a9c030b98..b6fa7ce3e 100644
--- a/installed-tests/js/meson.build
+++ b/installed-tests/js/meson.build
@@ -109,6 +109,7 @@ jasmine_tests = [
     'Namespace',
     'Package',
     'ParamSpec',
+    'Print',
     'Regress',
     'Signals',
     'System',
diff --git a/installed-tests/js/testPrint.js b/installed-tests/js/testPrint.js
new file mode 100644
index 000000000..c42b0003d
--- /dev/null
+++ b/installed-tests/js/testPrint.js
@@ -0,0 +1,31 @@
+describe('print', function () {
+    it('can be spied upon', function () {
+        spyOn(globalThis, 'print');
+        print('foo');
+        expect(print).toHaveBeenCalledWith('foo');
+    });
+});
+
+describe('printerr', function () {
+    it('can be spied upon', function () {
+        spyOn(globalThis, 'printerr');
+        printerr('foo');
+        expect(printerr).toHaveBeenCalledWith('foo');
+    });
+});
+
+describe('log', function () {
+    it('can be spied upon', function () {
+        spyOn(globalThis, 'log');
+        log('foo');
+        expect(log).toHaveBeenCalledWith('foo');
+    });
+});
+
+describe('logError', function () {
+    it('can be spied upon', function () {
+        spyOn(globalThis, 'logError');
+        logError('foo', 'bar');
+        expect(logError).toHaveBeenCalledWith('foo', 'bar');
+    });
+});
diff --git a/modules/script/_bootstrap/default.js b/modules/script/_bootstrap/default.js
index 6b2200960..4c1fb1791 100644
--- a/modules/script/_bootstrap/default.js
+++ b/modules/script/_bootstrap/default.js
@@ -7,21 +7,25 @@
         print: {
             configurable: false,
             enumerable: true,
+            writable: true,
             value: print,
         },
         printerr: {
             configurable: false,
             enumerable: true,
+            writable: true,
             value: printerr,
         },
         log: {
             configurable: false,
             enumerable: true,
+            writable: true,
             value: log,
         },
         logError: {
             configurable: false,
             enumerable: true,
+            writable: true,
             value: logError,
         },
     });