Add Gitlab::Themes module; remove Gitlab::Theme

Now we can simply loop through all themes, among other things.

This also removes the `dark_theme` / `light_theme` classes and the
`theme_type` helper, since they weren't used anywhere.

1 files changed, 51 insertions, 0 deletions

diff --git a/spec/lib/gitlab/themes_spec.rb b/spec/lib/gitlab/themes_spec.rb
new file mode 100644
index 00000000000..9c6c3fd8104
--- /dev/null
+++ b/spec/lib/gitlab/themes_spec.rb
@@ -0,0 +1,51 @@
+require 'spec_helper'
+
+describe Gitlab::Themes do
+  describe '.body_classes' do
+    it 'returns a space-separated list of class names' do
+      css = described_class.body_classes
+
+      expect(css).to include('ui_graphite')
+      expect(css).to include(' ui_charcoal ')
+      expect(css).to include(' ui_blue')
+    end
+  end
+
+  describe '.by_id' do
+    it 'returns a Theme by its ID' do
+      expect(described_class.by_id(1).name).to eq 'Graphite'
+      expect(described_class.by_id(6).name).to eq 'Blue'
+    end
+  end
+
+  describe '.default' do
+    it 'returns the default application theme' do
+      allow(described_class).to receive(:default_id).and_return(2)
+      expect(described_class.default.id).to eq 2
+    end
+
+    it 'prevents an infinite loop when configuration default is invalid' do
+      default = described_class::APPLICATION_DEFAULT
+      themes  = described_class::THEMES
+
+      config = double(default_theme: 0).as_null_object
+      allow(Gitlab).to receive(:config).and_return(config)
+      expect(described_class.default.id).to eq default
+
+      config = double(default_theme: themes.size + 5).as_null_object
+      allow(Gitlab).to receive(:config).and_return(config)
+      expect(described_class.default.id).to eq default
+    end
+  end
+
+  describe '.each' do
+    it 'passes the block to the THEMES Array' do
+      ids = []
+      described_class.each { |theme| ids << theme.id }
+      expect(ids).not_to be_empty
+
+      # TODO (rspeicher): RSpec 3.x
+      # expect(described_class.each).to yield_with_arg(described_class::Theme)
+    end
+  end
+end