1 files changed, 122 insertions, 0 deletions
diff --git a/atom/packages/vim-mode/spec/scroll-spec.coffee b/atom/packages/vim-mode/spec/scroll-spec.coffee
new file mode 100644
index 0000000..9473193
--- /dev/null
+++ b/atom/packages/vim-mode/spec/scroll-spec.coffee
@@ -0,0 +1,122 @@
+helpers = require './spec-helper'
+
+describe "Scrolling", ->
+  [editor, editorElement, vimState] = []
+
+  beforeEach ->
+    vimMode = atom.packages.loadPackage('vim-mode')
+    vimMode.activateResources()
+
+    helpers.getEditorElement (element) ->
+      editorElement = element
+      editor = editorElement.getModel()
+      vimState = editorElement.vimState
+      vimState.activateCommandMode()
+      vimState.resetCommandMode()
+
+  keydown = (key, options={}) ->
+    options.element ?= editorElement
+    helpers.keydown(key, options)
+
+  describe "scrolling keybindings", ->
+    beforeEach ->
+      editor.setText("1\n2\n3\n4\n5\n6\n7\n8\n9\n10")
+      spyOn(editor, 'getFirstVisibleScreenRow').andReturn(2)
+      spyOn(editor, 'getLastVisibleScreenRow').andReturn(8)
+      spyOn(editor, 'scrollToScreenPosition')
+
+    describe "the ctrl-e keybinding", ->
+      beforeEach ->
+        spyOn(editor, 'getCursorScreenPosition').andReturn({row: 4, column: 0})
+        spyOn(editor, 'setCursorScreenPosition')
+
+      it "moves the screen down by one and keeps cursor onscreen", ->
+        keydown('e', ctrl: true)
+        expect(editor.scrollToScreenPosition).toHaveBeenCalledWith([7, 0])
+        expect(editor.setCursorScreenPosition).toHaveBeenCalledWith([6, 0])
+
+    describe "the ctrl-y keybinding", ->
+      beforeEach ->
+        spyOn(editor, 'getCursorScreenPosition').andReturn({row: 6, column: 0})
+        spyOn(editor, 'setCursorScreenPosition')
+
+      it "moves the screen up by one and keeps the cursor onscreen", ->
+        keydown('y', ctrl: true)
+        expect(editor.scrollToScreenPosition).toHaveBeenCalledWith([3, 0])
+        expect(editor.setCursorScreenPosition).toHaveBeenCalledWith([4, 0])
+
+  describe "scroll cursor keybindings", ->
+    beforeEach ->
+      text = ""
+      for i in [1..200]
+        text += "#{i}\n"
+      editor.setText(text)
+
+      spyOn(editor, 'moveToFirstCharacterOfLine')
+      spyOn(editor, 'getLineHeightInPixels').andReturn(20)
+      spyOn(editor, 'setScrollTop')
+      spyOn(editor, 'getHeight').andReturn(200)
+      spyOn(editor, 'getFirstVisibleScreenRow').andReturn(90)
+      spyOn(editor, 'getLastVisibleScreenRow').andReturn(110)
+
+    describe "the z<CR> keybinding", ->
+      keydownCodeForEnter = '\r'
+
+      beforeEach ->
+        spyOn(editor, 'pixelPositionForScreenPosition').andReturn({top: 1000, left: 0})
+
+      it "moves the screen to position cursor at the top of the window and moves cursor to first non-blank in the line", ->
+        keydown('z')
+        keydown(keydownCodeForEnter)
+        expect(editor.setScrollTop).toHaveBeenCalledWith(960)
+        expect(editor.moveToFirstCharacterOfLine).toHaveBeenCalled()
+
+    describe "the zt keybinding", ->
+      beforeEach ->
+        spyOn(editor, 'pixelPositionForScreenPosition').andReturn({top: 1000, left: 0})
+
+      it "moves the screen to position cursor at the top of the window and leave cursor in the same column", ->
+        keydown('z')
+        keydown('t')
+        expect(editor.setScrollTop).toHaveBeenCalledWith(960)
+        expect(editor.moveToFirstCharacterOfLine).not.toHaveBeenCalled()
+
+    describe "the z. keybinding", ->
+      beforeEach ->
+        spyOn(editor, 'pixelPositionForScreenPosition').andReturn({top: 1000, left: 0})
+
+      it "moves the screen to position cursor at the center of the window and moves cursor to first non-blank in the line", ->
+        keydown('z')
+        keydown('.')
+        expect(editor.setScrollTop).toHaveBeenCalledWith(900)
+        expect(editor.moveToFirstCharacterOfLine).toHaveBeenCalled()
+
+    describe "the zz keybinding", ->
+      beforeEach ->
+        spyOn(editor, 'pixelPositionForScreenPosition').andReturn({top: 1000, left: 0})
+
+      it "moves the screen to position cursor at the center of the window and leave cursor in the same column", ->
+        keydown('z')
+        keydown('z')
+        expect(editor.setScrollTop).toHaveBeenCalledWith(900)
+        expect(editor.moveToFirstCharacterOfLine).not.toHaveBeenCalled()
+
+    describe "the z- keybinding", ->
+      beforeEach ->
+        spyOn(editor, 'pixelPositionForScreenPosition').andReturn({top: 1000, left: 0})
+
+      it "moves the screen to position cursor at the bottom of the window and moves cursor to first non-blank in the line", ->
+        keydown('z')
+        keydown('-')
+        expect(editor.setScrollTop).toHaveBeenCalledWith(860)
+        expect(editor.moveToFirstCharacterOfLine).toHaveBeenCalled()
+
+    describe "the zb keybinding", ->
+      beforeEach ->
+        spyOn(editor, 'pixelPositionForScreenPosition').andReturn({top: 1000, left: 0})
+
+      it "moves the screen to position cursor at the bottom of the window and leave cursor in the same column", ->
+        keydown('z')
+        keydown('b')
+        expect(editor.setScrollTop).toHaveBeenCalledWith(860)
+        expect(editor.moveToFirstCharacterOfLine).not.toHaveBeenCalled()