spec/lib/algebra/formula_spec.rb in dydx-0.0.3 vs spec/lib/algebra/formula_spec.rb in dydx-0.0.4

@@ -48,27 +48,10 @@
     it{ expect(exponentiation.d(:x).to_s).to eq('( y * ( x ^ ( y - 1 ) ) )') }
     it{ expect(exponentiation.d(:y).to_s).to eq('( ( x ^ y ) * log( x ) )') }
     it{ expect(exponentiation.d(:z).to_s).to eq('0') }
   end
 
-  context 'With Symbol' do
-    $a = (:x ^ :n)
-    let(:d1){ da/dx }
-    let(:d2){ d/dx($a) }
-    it{ expect(d1.to_s).to eq('( n * ( x ^ ( n - 1 ) ) )') }
-    it{ expect(d2.to_s).to eq('( n * ( x ^ ( n - 1 ) ) )') }
+  describe '#include?' do
+    it{ expect(addition.include?(:x)).to be_true }
+    it{ expect(addition.include?(:z)).to be_false }
   end
-
-  context 'With Symbol' do
-    $b = (:x ^ (:x * 2))
-    let(:d1){ db/dx }
-    let(:d2){ d/dx($b) }
-    it{ expect(d1.to_s).to eq('( ( x * 2 ) * ( x ^ ( ( x * 2 ) - 1 ) ) )') }
-    it{ expect(d2.to_s).to eq('( ( x * 2 ) * ( x ^ ( ( x * 2 ) - 1 ) ) )') }
-  end
-
-  $c = (:t ^ 2) / 2
-  let(:d1){ dc/dt }
-  let(:d2){ d/dt($c) }
-  it{ expect(d1.to_s).to eq('t') }
-  it{ expect(d2.to_s).to eq('t') }
 end
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