From 5d26288b2c9cfd5ce6cb92fd0363621fba87d6a3 Mon Sep 17 00:00:00 2001
From: mo khan <mo@mokhan.ca>
Date: Fri, 25 Jul 2014 14:24:07 -0600
Subject: add a usage command.

---
 lib/tfa.rb               |  1 +
 lib/tfa/console.rb       |  2 ++
 lib/tfa/usage_command.rb | 15 +++++++++++++++
 spec/lib/console_spec.rb | 26 +++++++++++++++++++-------
 4 files changed, 37 insertions(+), 7 deletions(-)
 create mode 100644 lib/tfa/usage_command.rb

diff --git a/lib/tfa.rb b/lib/tfa.rb
index 17a6f02..5138e7b 100644
--- a/lib/tfa.rb
+++ b/lib/tfa.rb
@@ -4,4 +4,5 @@ require "tfa/version"
 require "tfa/add_command"
 require "tfa/show_command"
 require "tfa/totp_command"
+require "tfa/usage_command"
 require "tfa/console"
diff --git a/lib/tfa/console.rb b/lib/tfa/console.rb
index 3d42985..f0bf3eb 100644
--- a/lib/tfa/console.rb
+++ b/lib/tfa/console.rb
@@ -19,6 +19,8 @@ module TFA
         ShowCommand.new(@storage)
       when "totp"
         TotpCommand.new(@storage)
+      else
+        UsageCommand.new(@storage)
       end
     end
   end
diff --git a/lib/tfa/usage_command.rb b/lib/tfa/usage_command.rb
new file mode 100644
index 0000000..3dd5abd
--- /dev/null
+++ b/lib/tfa/usage_command.rb
@@ -0,0 +1,15 @@
+module TFA
+  class UsageCommand
+    def initialize(storage)
+    end
+
+    def run(arguments)
+      <<-MESSAGE
+Try:
+  - tfa add develoment <secret>
+  - tfa show development
+  - tfa totp development
+      MESSAGE
+    end
+  end
+end
diff --git a/spec/lib/console_spec.rb b/spec/lib/console_spec.rb
index 90098d0..966ca9a 100644
--- a/spec/lib/console_spec.rb
+++ b/spec/lib/console_spec.rb
@@ -3,14 +3,26 @@ module TFA
     subject { Console.new('testing') }
     let(:secret) { ::ROTP::Base32.random_base32 }
 
-    it "saves a new secret" do
-      subject.run(["add", "development", secret])
-      expect(subject.run(["show", "development"])).to eql(secret)
-    end
+    describe "#run" do
+      context "when adding a key" do
+        it "saves a new secret" do
+          subject.run(["add", "development", secret])
+          expect(subject.run(["show", "development"])).to eql(secret)
+        end
+      end
+
+      context "when getting a one time password" do
+        it "creates a totp for a certain key" do
+          subject.run(["add", "development", secret])
+          expect(subject.run(["totp", "development"])).to_not be_nil
+        end
+      end
 
-    it "creates a totp for a certain key" do
-      subject.run(["add", "development", secret])
-      expect(subject.run(["totp", "development"])).to_not be_nil
+      context "when running an unknown command" do
+        it "returns the usage" do
+          expect(subject.run([])).to_not be_nil
+        end
+      end
     end
   end
 end
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