Add JS specs for replyWithSelectedText

app/assets/javascripts/shortcuts_issueable.coffee

+#= require jquery
+#= require mousetrap
+
 #= require shortcuts_navigation
 
 class @ShortcutsIssueable extends ShortcutsNavigation

spec/javascripts/shortcuts_issueable_spec.js.coffee

+#= require jquery
+#= require jasmine-fixture
+
+#= require shortcuts_issueable
+
+describe 'ShortcutsIssueable', ->
+  beforeEach ->
+    @shortcut = new ShortcutsIssueable()
+
+  describe '#replyWithSelectedText', ->
+    # Stub window.getSelection to return the provided String.
+    stubSelection = (text) ->
+      window.getSelection = -> text
+
+    beforeEach ->
+      @selector = 'form.js-main-target-form textarea#note_note'
+      affix(@selector)
+
+    describe 'with empty selection', ->
+      it 'does nothing', ->
+        stubSelection('')
+        @shortcut.replyWithSelectedText()
+        expect($(@selector).val()).toBe('')
+
+    describe 'with any selection', ->
+      beforeEach ->
+        stubSelection('Selected text.')
+
+      it 'leaves existing input intact', ->
+        $(@selector).val('This text was already here.')
+        expect($(@selector).val()).toBe('This text was already here.')
+
+        @shortcut.replyWithSelectedText()
+        expect($(@selector).val()).
+          toBe("This text was already here.\n> Selected text.\n\n")
+
+      it 'triggers `input`', ->
+        triggered = false
+        $(@selector).on 'input', -> triggered = true
+        @shortcut.replyWithSelectedText()
+
+        expect(triggered).toBe(true)
+
+      it 'triggers `focus`', ->
+        focused = false
+        $(@selector).on 'focus', -> focused = true
+        @shortcut.replyWithSelectedText()
+
+        expect(focused).toBe(true)
+
+    describe 'with a one-line selection', ->
+      it 'quotes the selection', ->
+        stubSelection('This text has been selected.')
+
+        @shortcut.replyWithSelectedText()
+
+        expect($(@selector).val()).
+          toBe("> This text has been selected.\n\n")
+
+    describe 'with a multi-line selection', ->
+      it 'quotes the selected lines as a group', ->
+        stubSelection(
+          """
+          Selected line one.
+
+          Selected line two.
+          Selected line three.
+
+          """
+        )
+
+        @shortcut.replyWithSelectedText()
+
+        expect($(@selector).val()).
+          toBe(
+            """
+            > Selected line one.
+            > Selected line two.
+            > Selected line three.
+
+
+            """
+          )