spec/luhnacy_spec.rb in luhnacy-0.1.0 vs spec/luhnacy_spec.rb in luhnacy-0.2.0

@@ -21,6 +21,53 @@
   it "should return a string of digits that does not satisfy Luhn" do
     string_size = 5
     candidate = Luhnacy.generate(string_size, :invalid => true)
     Luhnacy.valid?(candidate).should be_false
   end
+
+  it "should return a string that satisfies luhn and includes a given prefix" do
+    prefix = '12345'
+    string_size = 15
+    candidate = Luhnacy.generate(string_size, :prefix => prefix)
+    candidate.should match /^#{prefix}\d{#{string_size - prefix.size}}$/
+  end
+
+  it "should return an error if the prefix contains any non-numeric characters" do
+    prefix = 'AB123'
+    string_size = 15
+    lambda { Luhnacy.generate(string_size, :prefix => prefix) }.should raise_error ArgumentError
+  end
+
+  context "Named generators and validators" do
+    it "should validate a correct number" do
+      number = '5354334446769063'
+      Luhnacy.mastercard?(number).should be_true
+    end
+
+    it "should not validate a number if it does not satisfy Luhn" do
+      number = '5354334446769064'
+      Luhnacy.mastercard?(number).should be_false
+    end
+
+    it "should not validate a number if it does not have the correct prefix" do
+      number = Luhnacy.generate(16, :prefix => '49')
+      Luhnacy.mastercard?(number).should be_false
+    end
+
+    it "should not validate a number if it does not have the correct length" do
+      number = Luhnacy.generate(12, :prefix => '52')
+      Luhnacy.mastercard?(number).should be_false
+    end
+
+    it "should generate a valid number" do
+      Luhnacy.mastercard?(Luhnacy.mastercard).should be_true
+    end
+
+    it "should generate an invalid number" do
+      Luhnacy.mastercard?(Luhnacy.mastercard(:invalid => true)).should be_false
+    end
+
+    it "should raise an error if there is no matcher or validator with a given name" do
+      lambda { Luhnacy.superawesomecard?('123') }.should raise_error NoMethodError
+    end
+  end
 end