Add retriever specs

Gemfile.lock

@@ -41,6 +41,7 @@ GEM
       aws-sigv4 (~> 1.0)
     aws-sigv4 (1.0.2)
     builder (3.2.3)
+    coderay (1.1.2)
     concurrent-ruby (1.0.5)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
@@ -63,6 +64,9 @@ GEM
     parser (2.5.0.5)
       ast (~> 2.4.0)
     powerpack (0.1.1)
+    pry (0.11.3)
+      coderay (~> 1.1.0)
+      method_source (~> 0.9.0)
     public_suffix (3.0.2)
     rack (2.0.4)
     rack-test (1.0.0)
@@ -117,6 +121,7 @@ PLATFORMS
 
 DEPENDENCIES
   bundler (~> 1.16)
+  pry
   psenv!
   psenv-rails!
   rake (~> 10.0)

lib/psenv/version.rb

@@ -1,3 +1,3 @@
 module Psenv
-  VERSION = "0.2.0".freeze
+  VERSION = "0.2.1".freeze
 end

psenv.gemspec

@@ -21,6 +21,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_development_dependency "bundler", "~> 1.16"
+  spec.add_development_dependency "pry"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rspec", "~> 3.0"
   spec.add_development_dependency "rubocop", "0.54"

spec/retriever_spec.rb

@@ -0,0 +1,71 @@
+require "spec_helper"
+
+require "ostruct"
+
+RSpec.describe Psenv::Parameter do
+  context ".new" do
+    let(:parameter) do
+      {
+        name: "/psenv/test/VARIABLE",
+        value: "value",
+        type: "String",
+        version: 1,
+      }
+    end
+    subject { Psenv::Parameter.new(parameter) }
+
+    it "creates a paraemeter object" do
+      expect(subject).to be_kind_of(Psenv::Parameter)
+    end
+
+    it "stores the correct name" do
+      expect(subject.name).to eq("VARIABLE")
+    end
+
+    it "stores the value" do
+      expect(subject.value).to eq("value")
+    end
+  end
+end
+
+RSpec.describe Psenv::Retriever do
+  context ".new" do
+    it "creates a retriever object" do
+      expect(Psenv::Retriever.new("A")).to be_kind_of(Psenv::Retriever)
+    end
+  end
+
+  context "#call" do
+    let(:ssm) { double }
+    before(:each) { allow(Aws::SSM::Client).to receive(:new) { ssm } }
+
+    subject { Psenv::Retriever.new("/psenv/test").call }
+
+    context "with a successful request" do
+      before(:each) do
+        allow(ssm).to receive(:get_parameters_by_path) {
+          OpenStruct.new(
+            parameters: [{
+              name: "/psenv/test/API_KEY",
+              value: "value",
+              type: "String",
+              version: 1,
+            }],
+          )
+        }
+      end
+
+      it "returns the parsed parameters" do
+        expect(subject).to eq("API_KEY" => "value")
+      end
+    end
+
+    context "when the request fails" do
+      before(:each) { allow(ssm).to receive(:get_parameters_by_path).and_raise }
+
+      it "raises a RetrieveError" do
+        expect { subject }.to raise_error(Psenv::RetrieveError)
+      end
+    end
+  end
+end