spec/calculator_spec.rb in dentaku-2.0.7 vs spec/calculator_spec.rb in dentaku-2.0.8

@@ -29,10 +29,11 @@
     expect(calculator.evaluate('3 + 0 / -3')).to eq(3)
     expect(calculator.evaluate('15 % 8')).to eq(7)
     expect(calculator.evaluate('(((695759/735000)^(1/(1981-1991)))-1)*1000').round(4)).to eq(5.5018)
     expect(calculator.evaluate('0.253/0.253')).to eq(1)
     expect(calculator.evaluate('0.253/d', d: 0.253)).to eq(1)
+    expect(calculator.evaluate('10 + x', x: 'abc')).to be_nil
   end
 
   describe 'memory' do
     it { expect(calculator).to be_empty }
     it { expect(with_memory).not_to be_empty   }
@@ -278,10 +279,16 @@
         choice: 2,
         bar: nil,
         foo: nil
       )
     end
+
+    it 'raises errors when used in arithmetic operation' do
+      expect {
+        calculator.solve!(more_apples: "apples + 1", apples: nil)
+      }.to raise_error(Dentaku::ArgumentError)
+    end
   end
 
   describe 'case statements' do
     it 'handles complex then statements' do
       formula = <<-FORMULA
@@ -367,8 +374,16 @@
           expect(calculator.evaluate("#{method}(1,2)")).to eq Math.send(method, 1, 2)
         else
           expect(calculator.evaluate("#{method}(1)")).to eq Math.send(method, 1)
         end
       end
+    end
+  end
+
+  describe 'string functions' do
+    it 'concatenates two strings' do
+      expect(
+        calculator.evaluate('CONCAT(s1, s2)', 's1' => 'abc', 's2' => 'def')
+      ).to eq 'abcdef'
     end
   end
 end