add rspec

nftmaker_api.gemspec

@@ -21,4 +21,6 @@ Gem::Specification.new do |gem|
 
   gem.add_dependency "oj", "~> 3.1"
   gem.add_dependency "faraday", ">= 1", "< 2"
+
+  gem.add_development_dependency "rspec", "~> 3.10"
 end

spec/client_spec.rb

@@ -0,0 +1,36 @@
+require 'spec_helper'
+
+describe NftmakerApi do
+  subject { described_class.new }
+
+  describe "configuration" do
+    it "has default settings" do
+      expect(subject.configuration.api_key).to eq nil
+      expect(subject.configuration.host).to eq "https://api.nft-maker.io"
+      expect(subject.configuration.http_adapter).to eq :net_http
+    end
+
+    it "allows to change settings" do
+      described_class.configure do |c|
+        c.api_key = "12345678"
+        c.host = "foobar.com"
+        c.http_adapter = :typhoeus
+      end
+
+      expect(subject.configuration.api_key).to eq "12345678"
+      expect(subject.configuration.host).to eq "foobar.com"
+      expect(subject.configuration.http_adapter).to eq :typhoeus
+      expect(subject.http_client.adapter).to eq Faraday::Adapter::Typhoeus
+    end
+
+    it "allows settings per instance" do
+      client_1 = described_class.new(host: "foo.com", api_key: "foo123")
+      expect(client_1.api_key).to eq "foo123"
+      expect(client_1.host).to eq "foo.com"
+
+      client_2 = described_class.new(host: "bar.com", api_key: "bar123")
+      expect(client_2.api_key).to eq "bar123"
+      expect(client_2.host).to eq "bar.com"
+    end
+  end
+end

spec/spec_helper.rb

@@ -0,0 +1,8 @@
+require 'bundler/setup'
+Bundler.setup
+
+require 'nftmaker_api'
+
+RSpec.configure do |config|
+  # some (optional) config here
+end