Add some initial specs (#3)

.rspec

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+--color
+--require spec_helper

spec/chroma/define_palette_spec.rb

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+describe Chroma, '.define_palette' do
+  def add_palette
+    Chroma.define_palette :foo do
+      spin 60
+      spin 180
+      spin(60).brighten(20)
+      greyscale
+    end
+  end
+
+  def remove_palette
+    if Chroma::Harmonies.method_defined? :foo
+      Chroma::Harmonies.send(:remove_method, :foo)
+    end
+  end
+
+  after(:example) { remove_palette }
+
+  let(:red) { '#ff0000'.paint }
+
+  it 'adds the new palette method' do
+    expect(red.palette).to_not respond_to(:foo)
+    add_palette
+    expect(red.palette).to respond_to(:foo)
+  end
+
+  it 'generates the correct colors' do
+    add_palette
+
+    expect(red.palette.foo).
+      to generate_palette %w(#ff0000 #ffff00 #00ffff #ffff33 #808080)
+  end
+end

spec/chroma/paint_spec.rb

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+require 'spec_helper'
+
+describe Chroma do
+  describe '.paint' do
+    context 'with named color' do
+      it 'creates a color' do
+        expect(Chroma.paint('red')).to be_a(Chroma::Color)
+      end
+    end
+
+    context 'with 6 character hexadecimal' do
+      it 'creates a color' do
+        expect(Chroma.paint('#ff0000')).to be_a(Chroma::Color)
+        expect(Chroma.paint('ff0000')).to be_a(Chroma::Color)
+      end
+    end
+
+    context 'with 3 character hexadecimal' do
+      it 'creates a color' do
+        expect(Chroma.paint('#f00')).to be_a(Chroma::Color)
+        expect(Chroma.paint('f00')).to be_a(Chroma::Color)
+      end
+    end
+
+    context 'with 8 character hexadecimal' do
+      let(:hex) { '#80ff0000' }
+
+      it 'creates a color' do
+        expect(Chroma.paint(hex)).to be_a(Chroma::Color)
+        expect(Chroma.paint(hex[1..-1])).to be_a(Chroma::Color)
+      end
+
+      it 'sets alpha' do
+        expect(Chroma.paint(hex).alpha).to be_within(0.1).of(0.5)
+      end
+    end
+
+    context 'with rgb' do
+      it 'creates a color' do
+        expect(Chroma.paint('rgb(255, 0, 0)')).to be_a(Chroma::Color)
+        expect(Chroma.paint('rgba(255, 0, 0, 0.5)')).to be_a(Chroma::Color)
+      end
+
+      it 'sets alpha' do
+        expect(Chroma.paint('rgba(255, 0, 0, 0.5)').alpha).to eq(0.5)
+      end
+    end
+
+    context 'with hsl' do
+      it 'creates a color' do
+        expect(Chroma.paint('hsl(120, 100%, 50%)')).to be_a(Chroma::Color)
+      end
+    end
+  end
+end

spec/color/modifiers_spec.rb

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+require 'spec_helper'
+
+describe Chroma::Color do
+  describe '#spin' do
+    it 'generates the correct color' do
+      expect('red'.paint.spin(60)).to eq('yellow'.paint)
+    end
+  end
+end

spec/color/serializers_spec.rb

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+describe Chroma::Color do
+  context 'with serializers' do
+    let(:green)       { 'green'.paint }
+    let(:blue)        { 'rgba(0, 0, 255, 0.5)'.paint }
+    let(:transparent) { 'rgba(0, 0, 0, 0)'.paint }
+
+    describe '#to_hsv' do
+      it 'returns the hsv string' do
+        expect(green.to_hsv).to eq('hsv(120, 100%, 50%)')
+        expect(blue.to_hsv).to  eq('hsva(240, 100%, 100%, 0.5)')
+      end
+    end
+
+    describe '#to_hsl' do
+      it 'returns the hsl string' do
+        expect(green.to_hsl).to eq('hsl(120, 100%, 25%)')
+        expect(blue.to_hsl).to  eq('hsla(240, 100%, 50%, 0.5)')
+      end
+    end
+
+    describe '#to_hex' do
+      context 'with allow_3 set to false' do
+        it 'returns the hex string' do
+          expect(green.to_hex).to eq('#008000')
+          expect(blue.to_hex).to  eq('#0000ff')
+        end
+      end
+
+      context 'with allow_3 set to true' do
+        it 'returns the hex string' do
+          expect(green.to_hex(true)).to eq('#008000')
+          expect(blue.to_hex(true)).to  eq('#00f')
+        end
+      end
+    end
+
+    describe '#to_hex8' do
+      it 'returns the hex8 string' do
+        expect(green.to_hex8).to eq('#ff008000')
+        expect(blue.to_hex8).to  eq('#800000ff')
+      end
+    end
+
+    describe '#to_rgb' do
+      it 'returns the rgb string' do
+        expect(green.to_rgb).to eq('rgb(0, 128, 0)')
+        expect(blue.to_rgb).to  eq('rgba(0, 0, 255, 0.5)')
+      end
+    end
+
+    describe '#to_name' do
+      context 'with hex_for_unknown set to false' do
+        context 'with known named color' do
+          context 'when alpha = 1' do
+            it 'returns the named color' do
+              expect(green.to_name).to eq('green')
+            end
+          end
+
+          context 'when alpha < 1' do
+            it 'returns "<unknown>"' do
+              expect(blue.to_name).to eq('<unknown>')
+            end
+          end
+        end
+
+        context 'when alpha = 0' do
+          it 'returns "transparent"' do
+            expect(transparent.to_name).to eq('transparent')
+          end
+        end
+
+        context 'with unknown named color' do
+          it 'returns "<unknown>"' do
+            expect('#123'.paint.to_name).to eq('<unknown>')
+          end
+        end
+      end
+
+      context 'with hex_for_unknown set to true' do
+        context 'with known named color' do
+          context 'when alpha = 1' do
+            it 'returns the named color' do
+              expect(green.to_name(true)).to eq('green')
+            end
+          end
+
+          context 'when alpha < 1' do
+            it 'returns the hex string' do
+              expect(blue.to_name(true)).to eq('#0000ff')
+            end
+          end
+        end
+
+        context 'when alpha = 0' do
+          it 'returns "transparent"' do
+            expect(transparent.to_name(true)).to eq('transparent')
+          end
+        end
+
+        context 'with unknown named color' do
+          it 'returns returns the hex string' do
+            expect('#123'.paint.to_name(true)).to eq('#112233')
+          end
+        end
+      end
+    end
+
+    describe '#to_s' do
+      it 'returns the appropriate string according to format' do
+        expect('#ff0000'.paint.to_s).to                    eq('#ff0000')
+        expect('#f00'.paint.to_s).to                       eq('#f00')
+        expect('#80ff0000'.paint.to_s).to                  eq('#80ff0000')
+        expect('hsl(120, 100%, 50%)'.paint.to_s).to        eq('hsl(120, 100%, 50%)')
+        expect('hsla(120, 100%, 50%, 0.5)'.paint.to_s).to  eq('hsla(120, 100%, 50%, 0.5)')
+        expect('hsv(120, 100%, 50%)'.paint.to_s).to        eq('hsv(120, 100%, 50%)')
+        expect('hsva(120, 100%, 50%, 0.5)'.paint.to_s).to  eq('hsva(120, 100%, 50%, 0.5)')
+        expect('red'.paint.to_s).to                        eq('red')
+      end
+    end
+
+    describe '#hsv' do
+      it 'returns an hsv instance' do
+        hsv = green.hsv
+
+        expect(hsv).to be_a(Chroma::ColorModes::Hsv)
+        expect(hsv.h).to be_within(0.01).of(120)
+        expect(hsv.s).to be_within(0.01).of(1)
+        expect(hsv.v).to be_within(0.01).of(0.5)
+        expect(hsv.a).to eq(1)
+      end
+    end
+
+    describe '#hsl' do
+      it 'returns an hsl instance' do
+        hsl = green.hsl
+
+        expect(hsl).to be_a(Chroma::ColorModes::Hsl)
+        expect(hsl.h).to be_within(0.01).of(120)
+        expect(hsl.s).to be_within(0.01).of(1)
+        expect(hsl.l).to be_within(0.01).of(0.25)
+        expect(hsl.a).to eq(1)
+      end
+    end
+
+    describe '#rgb' do
+      it 'returns the underlying @rgb iv' do
+        expect(green.rgb).to equal(green.instance_variable_get(:@rgb))
+      end
+    end
+  end
+end

spec/color_spec.rb

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+require 'spec_helper'
+
+describe Chroma::Color do
+  let(:red)       { 'red'.paint }
+  let(:other_red) { '#f00'.paint }
+  let(:blue)      { 'blue'.paint }
+
+  context 'with equality' do
+    it 'equals itself' do
+      expect(red).to eql(red)
+      expect(red).to eq(red)
+    end
+
+    it 'equals another instance of the same color' do
+      expect(red).to eql(other_red)
+      expect(red).to eq(other_red)
+    end
+
+    it 'does not equal another instance of a different color' do
+      expect(red).to_not eql(blue)
+      expect(red).to_not eq(blue)
+    end
+  end
+
+  describe '#paint' do
+    it 'returns itself' do
+      expect(red.paint).to equal(red)
+    end
+  end
+end

spec/spec_helper.rb

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+require 'chroma'
+
+# This file was generated by the `rspec --init` command. Conventionally, all
+# specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
+# The generated `.rspec` file contains `--require spec_helper` which will cause this
+# file to always be loaded, without a need to explicitly require it in any files.
+#
+# Given that it is always loaded, you are encouraged to keep this file as
+# light-weight as possible. Requiring heavyweight dependencies from this file
+# will add to the boot time of your test suite on EVERY test run, even for an
+# individual file that may not need all of that loaded. Instead, consider making
+# a separate helper file that requires the additional dependencies and performs
+# the additional setup, and require it from the spec files that actually need it.
+#
+# The `.rspec` file also contains a few flags that are not defaults but that
+# users commonly want.
+#
+# See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
+RSpec.configure do |config|
+  # rspec-expectations config goes here. You can use an alternate
+  # assertion/expectation library such as wrong or the stdlib/minitest
+  # assertions if you prefer.
+  config.expect_with :rspec do |expectations|
+    # This option will default to `true` in RSpec 4. It makes the `description`
+    # and `failure_message` of custom matchers include text for helper methods
+    # defined using `chain`, e.g.:
+    # be_bigger_than(2).and_smaller_than(4).description
+    #   # => "be bigger than 2 and smaller than 4"
+    # ...rather than:
+    #   # => "be bigger than 2"
+    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
+  end
+
+  # rspec-mocks config goes here. You can use an alternate test double
+  # library (such as bogus or mocha) by changing the `mock_with` option here.
+  config.mock_with :rspec do |mocks|
+    # Prevents you from mocking or stubbing a method that does not exist on
+    # a real object. This is generally recommended, and will default to
+    # `true` in RSpec 4.
+    mocks.verify_partial_doubles = true
+  end
+
+# The settings below are suggested to provide a good initial experience
+# with RSpec, but feel free to customize to your heart's content.
+=begin
+  # These two settings work together to allow you to limit a spec run
+  # to individual examples or groups you care about by tagging them with
+  # `:focus` metadata. When nothing is tagged with `:focus`, all examples
+  # get run.
+  config.filter_run :focus
+  config.run_all_when_everything_filtered = true
+
+  # Limits the available syntax to the non-monkey patched syntax that is recommended.
+  # For more details, see:
+  #   - http://myronmars.to/n/dev-blog/2012/06/rspecs-new-expectation-syntax
+  #   - http://teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
+  #   - http://myronmars.to/n/dev-blog/2014/05/notable-changes-in-rspec-3#new__config_option_to_disable_rspeccore_monkey_patching
+  config.disable_monkey_patching!
+
+  # This setting enables warnings. It's recommended, but in some cases may
+  # be too noisy due to issues in dependencies.
+  config.warnings = true
+
+  # Many RSpec users commonly either run the entire suite or an individual
+  # file, and it's useful to allow more verbose output when running an
+  # individual spec file.
+  if config.files_to_run.one?
+    # Use the documentation formatter for detailed output,
+    # unless a formatter has already been configured
+    # (e.g. via a command-line flag).
+    config.default_formatter = 'doc'
+  end
+
+  # Print the 10 slowest examples and example groups at the
+  # end of the spec run, to help surface which specs are running
+  # particularly slow.
+  config.profile_examples = 10
+
+  # Run specs in random order to surface order dependencies. If you find an
+  # order dependency and want to debug it, you can fix the order by providing
+  # the seed, which is printed after each run.
+  #     --seed 1234
+  config.order = :random
+
+  # Seed global randomization in this process using the `--seed` CLI option.
+  # Setting this allows you to use `--seed` to deterministically reproduce
+  # test failures related to randomization by passing the same `--seed` value
+  # as the one that triggered the failure.
+  Kernel.srand config.seed
+=end
+end
+
+RSpec::Matchers.define :generate_palette do |expected|
+  expected.map!(&:paint)
+
+  match do |actual|
+    actual == expected
+  end
+end