spec/lib/helper_spec.rb in dydx-0.0.4 vs spec/lib/helper_spec.rb in dydx-0.0.5

@@ -1,32 +1,50 @@
 require 'spec_helper'
 
 describe Helper do
-  it{ expect(0.is_0?).to be_true }
-  it{ expect(_(0).is_0?).to be_true }
-  it{ expect(1.is_1?).to be_true }
-  it{ expect(_(1).is_1?).to be_true }
-  it{ expect(-1.is_minus1?).to be_true }
-  it{ expect(_(-1).is_minus1?).to be_true }
+  context '#is_n?' do
+    it{ expect(0.is_0?).to be_true }
+    it{ expect(_(0).is_0?).to be_true }
+    it{ expect(inverse(0, :+).is_0?).to be_true }
+    it{ expect(1.is_1?).to be_true }
+    it{ expect(_(1).is_1?).to be_true }
+    it{ expect(inverse(1, :*).is_1?).to be_true }
+    it{ expect(-1.is_minus1?).to be_true }
+    it{ expect(_(-1).is_minus1?).to be_true }
+  end
 
-  it{ expect(0.is_multiple_of(:x).to_s).to eq('0') }
-  it{ expect(_(0).is_multiple_of(:y).to_s).to eq('0')}
+  context '#is_multiple_of' do
+    it{ expect(0.is_multiple_of(:x).to_s).to eq('0') }
+    it{ expect(_(0).is_multiple_of(:y).to_s).to eq('0')}
 
-  it{ expect(:x.is_multiple_of(:x).to_s).to eq('1') }
-  it{ expect(:x.is_multiple_of(:y)).to be_false }
+    it{ expect(:x.is_multiple_of(:x).to_s).to eq('1') }
+    it{ expect(:x.is_multiple_of(:y)).to be_false }
 
-  it{ expect((:x * :y).is_multiple_of(:x)).to eq(:y) }
-  it{ expect((:x * :y).is_multiple_of(:y)).to eq(:x) }
-  it{ expect((:x * :y).is_multiple_of(:z)).to be_false }
+    it{ expect((:x * :y).is_multiple_of(:x)).to eq(:y) }
+    it{ expect((:x * :y).is_multiple_of(:y)).to eq(:x) }
+    it{ expect((:x * :y).is_multiple_of(:z)).to be_false }
+  end
 
+  context '#combinable?' do
+    it{ expect(:x.combinable?(:x, :+)).to be_true }
+    it{ expect(:x.combinable?(:y, :+)).to be_false }
+    it{ expect(:x.combinable?(:x, :*)).to be_true }
+    it{ expect(:x.combinable?(:y, :*)).to be_false }
+    it{ expect(1.combinable?(2, :+)).to be_true }
+    it{ expect(1.combinable?(2, :*)).to be_true }
+  end
+
   let(:addition)      { (:x + :y) }
   let(:subtraction)   { (:x - :y) }
   let(:multiplication){ (:x * :y) }
   let(:division)      { (:x / :y) }
   let(:exponentiation){ (:x ^ :y) }
 
   it{ expect(addition.addition?).to be_true }
-  it{ expect(subtraction.subtraction?).to be_true }
   it{ expect(multiplication.multiplication?).to be_true }
-  it{ expect(division.division?).to be_true }
   it{ expect(exponentiation.exponentiation?).to be_true }
+
+  it{ expect(inverse(:x, :+).inverse?(:x, :+)).to be_true }
+  it{ expect(:x.inverse?(inverse(:x, :+), :+)).to be_true }
+  it{ expect(inverse(:x, :*).inverse?(:x, :*)).to be_true }
+  it{ expect(:x.inverse?(inverse(:x, :*), :*)).to be_true }
 end
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