- add pathogen.vim (https://github.com/tpope/vim-pathogen)

- add vim-airline (https://github.com/vim-airline/vim-airline)

.vim/bundle/vim-airline/t/builder.vim

@@ -0,0 +1,106 @@
+let g:airline_theme = 'dark'
+call airline#init#bootstrap()
+
+describe 'active builder'
+  before
+    let s:builder = airline#builder#new({'active': 1})
+  end
+
+  it 'should start with an empty statusline'
+    let stl = s:builder.build()
+    Expect stl == ''
+  end
+
+  it 'should transition colors from one to the next'
+    call s:builder.add_section('Normal', 'hello')
+    call s:builder.add_section('Search', 'world')
+    let stl = s:builder.build()
+    Expect stl =~ '%#Normal#hello%#Normal_to_Search#>%#Search#world'
+  end
+
+  it 'should reuse highlight group if background colors match'
+    highlight Foo1 ctermfg=1 ctermbg=2
+    highlight Foo2 ctermfg=1 ctermbg=2
+    call s:builder.add_section('Foo1', 'hello')
+    call s:builder.add_section('Foo2', 'world')
+    let stl = s:builder.build()
+    Expect stl =~ '%#Foo1#hello>world'
+  end
+
+  it 'should switch highlight groups if foreground colors differ'
+    highlight Foo1 ctermfg=1 ctermbg=2
+    highlight Foo2 ctermfg=2 ctermbg=2
+    call s:builder.add_section('Foo1', 'hello')
+    call s:builder.add_section('Foo2', 'world')
+    let stl = s:builder.build()
+    Expect stl =~ '%#Foo1#hello%#Foo1_to_Foo2#>%#Foo2#world'
+  end
+
+  it 'should split left/right sections'
+    call s:builder.split()
+    let stl = s:builder.build()
+    Expect stl =~ '%='
+  end
+
+  it 'after split, sections use the right separator'
+    call s:builder.split()
+    call s:builder.add_section('Normal', 'hello')
+    call s:builder.add_section('Search', 'world')
+    let stl = s:builder.build()
+    Expect stl =~ 'hello%#Normal_to_Search#<%#Search#world'
+  end
+
+  it 'should not repeat the same highlight group'
+    call s:builder.add_section('Normal', 'hello')
+    call s:builder.add_section('Normal', 'hello')
+    let stl = s:builder.build()
+    Expect stl == '%#Normal#hello>hello'
+  end
+
+  it 'should replace accent groups with the specified group'
+    call s:builder.add_section('Normal', '%#__accent_foo#hello')
+    let stl = s:builder.build()
+    Expect stl == '%#Normal#%#Normal_foo#hello'
+  end
+
+  it 'should replace two accent groups with correct groups'
+    call s:builder.add_section('Normal', '%#__accent_foo#hello%#__accent_bar#world')
+    let stl = s:builder.build()
+    Expect stl =~ '%#Normal_foo#hello%#Normal_bar#world'
+  end
+
+  it 'should special restore group should go back to previous group'
+    call s:builder.add_section('Normal', '%#__restore__#')
+    let stl = s:builder.build()
+    Expect stl !~ '%#__restore__#'
+    Expect stl =~ '%#Normal#'
+  end
+
+  it 'should blend colors from the left through the split to the right'
+    call s:builder.add_section('Normal', 'hello')
+    call s:builder.split()
+    call s:builder.add_section('Search', 'world')
+    let stl = s:builder.build()
+    Expect stl =~ 'Normal_to_Search'
+  end
+end
+
+describe 'inactive builder'
+  before
+    let s:builder = airline#builder#new({'active': 0})
+  end
+
+  it 'should transition colors from one to the next'
+    call s:builder.add_section('Normal', 'hello')
+    call s:builder.add_section('Search', 'world')
+    let stl = s:builder.build()
+    Expect stl =~ '%#Normal_inactive#hello%#Normal_to_Search_inactive#>%#Search_inactive#world'
+  end
+
+  it 'should not render accents'
+    call s:builder.add_section('Normal', '%#__accent_foo#hello%#foo#foo%#__accent_bar#world')
+    let stl = s:builder.build()
+    Expect stl == '%#Normal_inactive#hello%#foo_inactive#fooworld'
+  end
+end
+