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diff --git a/web-ui/test/spec/mail_view/ui/send_button.spec.js b/web-ui/test/spec/mail_view/ui/send_button.spec.js
new file mode 100644
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+++ b/web-ui/test/spec/mail_view/ui/send_button.spec.js
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+describeComponent('mail_view/ui/send_button', function () {
+
+  describe('send button', function () {
+    beforeEach(function () {
+      setupComponent('<button />');
+    });
+
+    describe('when it is disabled', function () {
+      beforeEach(function () {
+        this.$node.prop('disabled', true);
+      });
+
+      it('gets enabled in a inputHasMail event', function () {
+        $(document).trigger(Smail.events.ui.recipients.inputHasMail, { name: 'to' });
+
+        expect(this.$node).not.toBeDisabled();
+      });
+
+      it('gets enabled in a recipients:updated where there are new recipients', function () {
+        $(document).trigger(Smail.events.ui.recipients.updated, { newRecipients: ['a@b.c']});
+
+        expect(this.$node).not.toBeDisabled();
+      });
+    });
+
+    describe('multiple events', function () {
+      it('gets enabled and remains enabled when a inputHasMail is followed by a recipients:updated with NO new recipients', function () {
+        this.$node.prop('disabled', true);
+
+        $(document).trigger(Smail.events.ui.recipients.inputHasMail, { name: 'to' });
+        $(document).trigger(Smail.events.ui.recipients.updated, { newRecipients: [] });
+
+        expect(this.$node).not.toBeDisabled();
+      });
+
+      it('gets enabled and remains enabled when a recipients:updated with recipients is followed by a inputHasNoMail', function () {
+        this.$node.prop('disabled', true);
+
+        $(document).trigger(Smail.events.ui.recipients.updated, { newRecipients: ['a@b.c']});
+        $(document).trigger(Smail.events.ui.recipients.inputHasNoMail, { name: 'to' });
+
+        expect(this.$node).not.toBeDisabled();
+      });
+    });
+
+    describe('when it is enabled', function () {
+      beforeEach(function () {
+        this.$node.prop('disabled', false);
+      });
+
+      it('gets disabled in a inputHasNoMail', function () {
+        $(document).trigger(Smail.events.ui.recipients.inputHasNoMail, { name: 'to' });
+
+        expect(this.$node).toBeDisabled();
+      });
+
+      it('gets disabled in a recipients:updated without new recipients', function () {
+        $(document).trigger(Smail.events.ui.recipients.updated, { newRecipients: []});
+
+        expect(this.$node).toBeDisabled();
+      });
+    });
+
+    describe('on click', function () {
+
+      it ('asks for the recipients input to complete its current input', function () {
+        var doCompleteInputEvent = spyOnEvent(document, Smail.events.ui.recipients.doCompleteInput);
+
+        this.$node.click();
+
+        expect(doCompleteInputEvent).toHaveBeenTriggeredOn(document);
+      });
+    });
+
+    describe('after clicking', function () {
+      beforeEach(function () {
+        this.$node.click();
+      });
+
+      it('waits for ui:mail:recipientsUpdated to happen 3 times in the mail then sends the mail then stops listening to ui:mail:recipientsUpdated', function () {
+        var sendMailEvent = spyOnEvent(document, Smail.events.ui.mail.send);
+        spyOn(this.component, 'off');
+
+        _.times(3, function () { $(document).trigger(Smail.events.ui.mail.recipientsUpdated) });;
+
+        expect(sendMailEvent).toHaveBeenTriggeredOn(document);
+        expect(this.component.off).toHaveBeenCalledWith(document, Smail.events.ui.mail.recipientsUpdated);
+      });
+    });
+  });
+});