diff --git a/.gitignore b/.gitignore
index 8d6a243f..cdf7f804 100644
--- a/.gitignore
+++ b/.gitignore
@@ -54,3 +54,5 @@ build-iPhoneSimulator/
 
 # Ignore cassette files
 /specs/cassettes/
+
+.DS_Store
diff --git a/lib/channel.rb b/lib/channel.rb
new file mode 100644
index 00000000..8755e4cf
--- /dev/null
+++ b/lib/channel.rb
@@ -0,0 +1,38 @@
+require "httparty"
+require "dotenv"
+require "awesome_print"
+
+Dotenv.load
+
+require_relative "recipient"
+
+module Slack
+  class Channel < Recipient
+    attr_reader :topic, :member_count
+
+    def initialize(name:, slack_id:, topic:, member_count:)
+      super(name: name, slack_id: slack_id)
+      @topic = topic
+      @member_count = member_count
+    end
+
+    def self.list
+      url = "https://slack.com/api/channels.list"
+      query_parameters = {
+        token: ENV["SLACK_TOKEN"],
+      }
+      response = Channel.get(url, query: query_parameters)
+      channels_array = []
+
+      response["channels"].each do |channel|
+        channel_hash = { "name" => channel["name"], "slack id" => channel["id"], "topic" => channel["topic"]["value"], "member count" => channel["members"].length }
+        channels_array << channel_hash
+      end
+      return channels_array
+    end
+
+    def details
+      return "\nname: #{name}, slack_id: #{slack_id}, topic: #{topic}, member count: #{member_count}"
+    end
+  end
+end
diff --git a/lib/recipient.rb b/lib/recipient.rb
new file mode 100644
index 00000000..0b0a1849
--- /dev/null
+++ b/lib/recipient.rb
@@ -0,0 +1,41 @@
+require "httparty"
+require "dotenv"
+MESSAGE_URL = "https://slack.com/api/chat.postMessage"
+
+module Slack
+  class Recipient
+    attr_reader :name, :slack_id
+
+    def initialize(name:, slack_id:)
+      @name = name
+      @slack_id = slack_id
+    end
+
+    def self.get(url, params)
+      return HTTParty.get(url, params)
+    end
+
+    def send_message(message)
+      body = {
+        token: ENV["SLACK_TOKEN"],
+        channel: slack_id,
+        text: message,
+      }
+
+      response = HTTParty.post(MESSAGE_URL, body: body)
+
+      if response["ok"] != true
+        raise SlackApiError.new("Invalid request. Error is #{response.code}: #{response.message}")
+      end
+      return response
+    end
+
+    def self.list
+      raise NotImplementedError, "Implement me in a child class!"
+    end
+
+    def details
+      raise NotImplementedError, "Implement me in a child class!"
+    end
+  end
+end
diff --git a/lib/slack.rb b/lib/slack.rb
index 960cf2f7..1eb61310 100755
--- a/lib/slack.rb
+++ b/lib/slack.rb
@@ -1,11 +1,75 @@
 #!/usr/bin/env ruby
+require "httparty"
+require "dotenv"
+require "awesome_print"
+require "table_print"
+require_relative "channel"
+require_relative "user"
+require_relative "workspace"
+require_relative "recipient"
+
+# For specific SlackApiError messages (https://stackoverflow.com/questions/3382866/rubys-exception-error-classes)
 
 def main
   puts "Welcome to the Ada Slack CLI!"
 
-  # TODO project
+  workspace = Slack::Workspace.new
+
+  input = ""
+  until input == "quit"
+    puts "\nPlease select an option:
+
+    -list users
+    -list channels
+    -select user
+    -select channel
+    -show details
+    -send message
+    -quit\n"
+    input = gets.chomp.downcase
 
-  puts "Thank you for using the Ada Slack CLI"
+    case input
+    when "list users"
+      user_array = Slack::User.list
+      tp user_array
+    when "list channels"
+      channel_array = Slack::Channel.list
+      tp channel_array
+    when "select user"
+      puts "\n[Enter a username or slack id]"
+      identifier = gets.chomp
+      begin
+        workspace.select_user(identifier)
+      rescue SlackApiError => e
+        puts "\n#{e.message}"
+      end
+    when "select channel"
+      puts "\n[Enter a name or slack id]"
+      identifier = gets.chomp
+      begin
+        workspace.select_channel(identifier)
+      rescue SlackApiError => e
+        puts "\n#{e.message}"
+      end
+    when "show details"
+      if workspace.show_details == nil
+        puts "\n[No user or channel has been selected]"
+      else
+        puts "#{workspace.show_details}"
+      end
+    when "send message"
+      if workspace.selected == nil
+        puts "\n[No user or channel has been selected]"
+      else
+        puts "What do you want to send?"
+        message = gets.chomp
+        workspace.send_message(message)
+      end
+    when "quit"
+      puts "[Thank you for using the Ada Slack CLI]"
+      exit
+    end
+  end
 end
 
-main if __FILE__ == $PROGRAM_NAME
\ No newline at end of file
+main if __FILE__ == $PROGRAM_NAME
diff --git a/lib/user.rb b/lib/user.rb
new file mode 100644
index 00000000..f26b5008
--- /dev/null
+++ b/lib/user.rb
@@ -0,0 +1,36 @@
+require "httparty"
+require "dotenv"
+require "awesome_print"
+
+Dotenv.load
+
+require_relative "recipient"
+
+module Slack
+  class User < Recipient
+    attr_reader :name, :real_name, :slack_id
+
+    def initialize(name:, slack_id:, real_name:)
+      super(name: name, slack_id: slack_id)
+      @real_name = real_name
+    end
+
+    def self.list
+      url = "https://slack.com/api/users.list"
+      query_parameters = {
+        token: ENV["SLACK_TOKEN"],
+      }
+      response = User.get(url, query: query_parameters)
+      users_array = []
+      response["members"].each do |member|
+        user_hash = { "real name" => member["real_name"], "user name" => member["name"], "slack id" => member["id"] }
+        users_array << user_hash
+      end
+      return users_array
+    end
+
+    def details
+      return "\nreal name: #{real_name}, user name: #{name}, slack_id: #{slack_id}"
+    end
+  end
+end
diff --git a/lib/verify_setup.rb b/lib/verify_setup.rb
new file mode 100644
index 00000000..051779f5
--- /dev/null
+++ b/lib/verify_setup.rb
@@ -0,0 +1,28 @@
+require "httparty"
+require "dotenv"
+require "awesome_print"
+
+Dotenv.load
+
+url = "https://slack.com/api/channels.list"
+query_parameters = {
+  token: ENV["SLACK_TOKEN"],
+}
+
+# channel_names =
+# puts query_parameters
+response = HTTParty.get(url, query: query_parameters)
+
+# Loops through the results and prints name of each channel
+# response["channels"].each do |channel|
+#   ap channel["name"]
+# end
+# ap response["channels"][1]["name"]
+
+# response["channels"].each do |channel|
+#   ap channel["members"].length
+# end
+
+response["channels"].each do |channel|
+  ap channel
+end
diff --git a/lib/workspace.rb b/lib/workspace.rb
new file mode 100644
index 00000000..251d4426
--- /dev/null
+++ b/lib/workspace.rb
@@ -0,0 +1,55 @@
+require_relative "user"
+require_relative "channel"
+require_relative "recipient"
+
+class SlackApiError < StandardError; end
+
+module Slack
+  class Workspace
+    attr_reader :users, :channels, :selected
+
+    def initialize
+      @users = Slack::User.list.map do |user_obj|
+        Slack::User.new(name: user_obj["user name"], slack_id: user_obj["slack id"], real_name: user_obj["real name"])
+      end
+      @channels = Slack::Channel.list.map do |chan_obj|
+        Slack::Channel.new(name: chan_obj["name"], slack_id: chan_obj["slack id"], topic: chan_obj["topic"], member_count: chan_obj["member count"])
+      end
+      @selected = nil
+    end
+
+    def select_channel(identifier)
+      @channels.each do |channel|
+        if [channel.name, channel.slack_id].include?(identifier)
+          @selected = channel
+          return @selected
+        end
+      end
+      raise SlackApiError.new("[We couldn't find this channel!]")
+    end
+
+    def select_user(identifier)
+      @users.each do |user|
+        if [user.name, user.slack_id].include?(identifier)
+          @selected = user
+          return @selected
+        end
+      end
+      raise SlackApiError.new("[We couldn't find this user!]")
+    end
+
+    def show_details
+      if @selected
+        @selected.details
+      end
+    end
+
+    def send_message(message)
+      if @selected
+        @selected.send_message(message)
+      else
+        return nil
+      end
+    end
+  end
+end
diff --git a/test/cassettes/channels_list.yml b/test/cassettes/channels_list.yml
new file mode 100644
index 00000000..5b97b43a
--- /dev/null
+++ b/test/cassettes/channels_list.yml
@@ -0,0 +1,391 @@
+---
+http_interactions:
+- request:
+    method: get
+    uri: https://slack.com/api/channels.list
+    body:
+      encoding: US-ASCII
+      string: ''
+    headers:
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+      Accept:
+      - "*/*"
+      User-Agent:
+      - Ruby
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '53'
+      Connection:
+      - keep-alive
+      Date:
+      - Tue, 10 Sep 2019 22:22:35 GMT
+      Server:
+      - Apache
+      Access-Control-Expose-Headers:
+      - x-slack-req-id, retry-after
+      Access-Control-Allow-Headers:
+      - slack-route, x-slack-version-ts
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      Referrer-Policy:
+      - no-referrer
+      X-Accepted-Oauth-Scopes:
+      - channels:read
+      Vary:
+      - Accept-Encoding
+      X-Slack-Req-Id:
+      - 748c7e78-f5b6-4210-ae06-17fd88b526be
+      X-Xss-Protection:
+      - '0'
+      X-Content-Type-Options:
+      - nosniff
+      Access-Control-Allow-Origin:
+      - "*"
+      X-Via:
+      - haproxy-www-4bmp
+      X-Cache:
+      - Miss from cloudfront
+      Via:
+      - 1.1 995664ee945c06fc706b5cb8e0e650dc.cloudfront.net (CloudFront)
+      X-Amz-Cf-Pop:
+      - SEA19-C1
+      X-Amz-Cf-Id:
+      - daH44ao5BgHMunAMatP-yBDwCGHuD1OahvjCT-FS0V9ljo8Wzvihiw==
+    body:
+      encoding: ASCII-8BIT
+      string: '{"ok":false,"error":"not_authed"}'
+    http_version: 
+  recorded_at: Tue, 10 Sep 2019 22:22:35 GMT
+- request:
+    method: get
+    uri: https://slack.com/api/channels.list?token=<SLACK_TOKEN>
+    body:
+      encoding: US-ASCII
+      string: ''
+    headers:
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+      Accept:
+      - "*/*"
+      User-Agent:
+      - Ruby
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '809'
+      Connection:
+      - keep-alive
+      Date:
+      - Tue, 10 Sep 2019 22:28:51 GMT
+      Server:
+      - Apache
+      X-Content-Type-Options:
+      - nosniff
+      X-Slack-Req-Id:
+      - 6300526b-693b-4988-89aa-7efb7ff0cad6
+      X-Oauth-Scopes:
+      - identify,channels:read,users:read,chat:write:bot
+      Expires:
+      - Mon, 26 Jul 1997 05:00:00 GMT
+      Cache-Control:
+      - private, no-cache, no-store, must-revalidate
+      Access-Control-Expose-Headers:
+      - x-slack-req-id, retry-after
+      X-Xss-Protection:
+      - '0'
+      X-Accepted-Oauth-Scopes:
+      - channels:read
+      Vary:
+      - Accept-Encoding
+      Pragma:
+      - no-cache
+      Access-Control-Allow-Headers:
+      - slack-route, x-slack-version-ts
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      Referrer-Policy:
+      - no-referrer
+      Access-Control-Allow-Origin:
+      - "*"
+      X-Via:
+      - haproxy-www-nvih
+      X-Cache:
+      - Miss from cloudfront
+      Via:
+      - 1.1 4d8620b80ebe37d366388e117039aa8e.cloudfront.net (CloudFront)
+      X-Amz-Cf-Pop:
+      - SEA19-C1
+      X-Amz-Cf-Id:
+      - u3aQwaOkBbi2f2kEV2hjDGfWtIB6RqHvc0kfel2N0jS0uLPCWIy7pg==
+    body:
+      encoding: ASCII-8BIT
+      string: '{"ok":true,"channels":[{"id":"CMTG8GHKL","name":"apis","is_channel":true,"created":1568071960,"is_archived":false,"is_general":false,"unlinked":0,"creator":"UN85KFVNK","name_normalized":"apis","is_shared":false,"is_org_shared":false,"is_member":true,"is_private":false,"is_mpim":false,"members":["UMTG87PC2","UN69TR3N1","UN85KFVNK"],"topic":{"value":"Testing
+        location for APIs.","creator":"UN69TR3N1","last_set":1568151873},"purpose":{"value":"","creator":"","last_set":0},"previous_names":[],"num_members":3},{"id":"CMURA7JFM","name":"random","is_channel":true,"created":1568071832,"is_archived":false,"is_general":false,"unlinked":0,"creator":"UN85KFVNK","name_normalized":"random","is_shared":false,"is_org_shared":false,"is_member":true,"is_private":false,"is_mpim":false,"members":["UMTG87PC2","UN69SEW21","UN69SF69K","UN69TR3N1","UN85KFVNK","UN85LNJMV"],"topic":{"value":"Non-work
+        banter and water cooler conversation","creator":"UN85KFVNK","last_set":1568071832},"purpose":{"value":"A
+        place for non-work-related flimflam, faffing, hodge-podge or jibber-jabber
+        you''d prefer to keep out of more focused work-related channels.","creator":"UN85KFVNK","last_set":1568071832},"previous_names":[],"num_members":6},{"id":"CN03170U9","name":"memes","is_channel":true,"created":1568090675,"is_archived":false,"is_general":false,"unlinked":0,"creator":"UN85KFVNK","name_normalized":"memes","is_shared":false,"is_org_shared":false,"is_member":true,"is_private":false,"is_mpim":false,"members":["UMTG87PC2","UN69SF69K","UN69TR3N1","UN85KFVNK","UN85LNJMV"],"topic":{"value":"all
+        the memes","creator":"UN69TR3N1","last_set":1568151900},"purpose":{"value":"we
+        need them","creator":"UN85KFVNK","last_set":1568090676},"previous_names":[],"num_members":5},{"id":"CN69J7LQG","name":"general","is_channel":true,"created":1568071832,"is_archived":false,"is_general":true,"unlinked":0,"creator":"UN85KFVNK","name_normalized":"general","is_shared":false,"is_org_shared":false,"is_member":true,"is_private":false,"is_mpim":false,"members":["UMTG87PC2","UN69SEW21","UN69SF69K","UN69TR3N1","UN85KFVNK","UN85LNJMV"],"topic":{"value":"Company-wide
+        announcements and work-based matters","creator":"UN85KFVNK","last_set":1568071832},"purpose":{"value":"This
+        channel is for workspace-wide communication and announcements. All members
+        are in this channel.","creator":"UN85KFVNK","last_set":1568071832},"previous_names":[],"num_members":6},{"id":"CN759T0MA","name":"fuzzy_bunnies","is_channel":true,"created":1568147657,"is_archived":false,"is_general":false,"unlinked":0,"creator":"UN69SEW21","name_normalized":"fuzzy_bunnies","is_shared":false,"is_org_shared":false,"is_member":true,"is_private":false,"is_mpim":false,"members":["UMTG87PC2","UN69SEW21","UN69SF69K","UN69TR3N1","UN85KFVNK","UN85LNJMV"],"topic":{"value":"Adorable
+        rabbits","creator":"UN69TR3N1","last_set":1568151886},"purpose":{"value":"For
+        photos and conversation about fuzzy bunnies.","creator":"UN69SEW21","last_set":1568147658},"previous_names":[],"num_members":6},{"id":"CN85KGEJ3","name":"slack-cli","is_channel":true,"created":1568071832,"is_archived":false,"is_general":false,"unlinked":0,"creator":"UN85KFVNK","name_normalized":"slack-cli","is_shared":false,"is_org_shared":false,"is_member":true,"is_private":false,"is_mpim":false,"members":["UMTG87PC2","UN69SEW21","UN69SF69K","UN69TR3N1","UN85KFVNK","UN85LNJMV"],"topic":{"value":"CLI","creator":"UN69TR3N1","last_set":1568151925},"purpose":{"value":"","creator":"","last_set":0},"previous_names":[],"num_members":6}],"response_metadata":{"next_cursor":""}}'
+    http_version: 
+  recorded_at: Tue, 10 Sep 2019 22:28:51 GMT
+- request:
+    method: get
+    uri: https://slack.com/api/users.list?token=<SLACK_TOKEN>
+    body:
+      encoding: US-ASCII
+      string: ''
+    headers:
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+      Accept:
+      - "*/*"
+      User-Agent:
+      - Ruby
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '1587'
+      Connection:
+      - keep-alive
+      Date:
+      - Wed, 11 Sep 2019 21:02:51 GMT
+      Server:
+      - Apache
+      X-Content-Type-Options:
+      - nosniff
+      X-Slack-Req-Id:
+      - bcb333b4-e151-4c8f-8075-122d2c337551
+      X-Oauth-Scopes:
+      - identify,channels:read,users:read,chat:write:bot
+      Expires:
+      - Mon, 26 Jul 1997 05:00:00 GMT
+      Cache-Control:
+      - private, no-cache, no-store, must-revalidate
+      Access-Control-Expose-Headers:
+      - x-slack-req-id, retry-after
+      X-Xss-Protection:
+      - '0'
+      X-Accepted-Oauth-Scopes:
+      - users:read
+      Vary:
+      - Accept-Encoding
+      Pragma:
+      - no-cache
+      Access-Control-Allow-Headers:
+      - slack-route, x-slack-version-ts
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      Referrer-Policy:
+      - no-referrer
+      Access-Control-Allow-Origin:
+      - "*"
+      X-Via:
+      - haproxy-www-wycu
+      X-Cache:
+      - Miss from cloudfront
+      Via:
+      - 1.1 44cd593d82a2d200a94217033c614c6a.cloudfront.net (CloudFront)
+      X-Amz-Cf-Pop:
+      - SEA19-C1
+      X-Amz-Cf-Id:
+      - yY5X54HGk0lT7PvD0ZzGu8qR_OnjPKBEMFP3aD7F9CeQyLWx1u_P2w==
+    body:
+      encoding: ASCII-8BIT
+      string: '{"ok":true,"members":[{"id":"USLACKBOT","team_id":"TMTG7023U","name":"slackbot","deleted":false,"color":"757575","real_name":"Slackbot","tz":null,"tz_label":"Pacific
+        Daylight Time","tz_offset":-25200,"profile":{"title":"","phone":"","skype":"","real_name":"Slackbot","real_name_normalized":"Slackbot","display_name":"Slackbot","display_name_normalized":"Slackbot","fields":null,"status_text":"","status_emoji":"","status_expiration":0,"avatar_hash":"sv41d8cd98f0","always_active":true,"first_name":"slackbot","last_name":"","image_24":"https:\/\/a.slack-edge.com\/80588\/img\/slackbot_24.png","image_32":"https:\/\/a.slack-edge.com\/80588\/img\/slackbot_32.png","image_48":"https:\/\/a.slack-edge.com\/80588\/img\/slackbot_48.png","image_72":"https:\/\/a.slack-edge.com\/80588\/img\/slackbot_72.png","image_192":"https:\/\/a.slack-edge.com\/80588\/marketing\/img\/avatars\/slackbot\/avatar-slackbot.png","image_512":"https:\/\/a.slack-edge.com\/80588\/img\/slackbot_512.png","status_text_canonical":"","team":"TMTG7023U"},"is_admin":false,"is_owner":false,"is_primary_owner":false,"is_restricted":false,"is_ultra_restricted":false,"is_bot":false,"is_app_user":false,"updated":0},{"id":"UMTG87PC2","team_id":"TMTG7023U","name":"nickyjinchoi","deleted":false,"color":"674b1b","real_name":"Nicky
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+      string: token=<SLACK_TOKEN>&channel=fuzzy_bunnies&text=hello%20from%20the%20other%20side
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+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+      Accept:
+      - "*/*"
+      User-Agent:
+      - Ruby
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '184'
+      Connection:
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+      Date:
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+      Access-Control-Allow-Headers:
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+      X-Cache:
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+      X-Amz-Cf-Pop:
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+      X-Amz-Cf-Id:
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+        API Project","bot_id":"BN85QTQ8P"}}'
+    http_version: 
+  recorded_at: Thu, 12 Sep 2019 20:00:50 GMT
+recorded_with: VCR 5.0.0
diff --git a/test/cassettes/message_post.yml b/test/cassettes/message_post.yml
new file mode 100644
index 00000000..95e66927
--- /dev/null
+++ b/test/cassettes/message_post.yml
@@ -0,0 +1,461 @@
+---
+http_interactions:
+- request:
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+    uri: https://slack.com/api/users.list?token=<SLACK_TOKEN>
+    body:
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+      string: ''
+    headers:
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+      Accept:
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+      User-Agent:
+      - Ruby
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '1632'
+      Connection:
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+      Date:
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+      Server:
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+      X-Slack-Req-Id:
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+      Cache-Control:
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+      Access-Control-Expose-Headers:
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+      Vary:
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+      Pragma:
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+      Access-Control-Allow-Headers:
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+      Strict-Transport-Security:
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+      Referrer-Policy:
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+      Access-Control-Allow-Origin:
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+      X-Via:
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+      X-Cache:
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+      Via:
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index 00000000..7c8a2ef2
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+    status:
+      code: 200
+      message: OK
+    headers:
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '185'
+      Connection:
+      - keep-alive
+      Date:
+      - Thu, 12 Sep 2019 20:14:15 GMT
+      Server:
+      - Apache
+      X-Content-Type-Options:
+      - nosniff
+      X-Slack-Req-Id:
+      - ac8518df-9ff6-4639-be09-2874ae9c4eae
+      X-Oauth-Scopes:
+      - identify,channels:read,users:read,chat:write:bot
+      Expires:
+      - Mon, 26 Jul 1997 05:00:00 GMT
+      Cache-Control:
+      - private, no-cache, no-store, must-revalidate
+      Access-Control-Expose-Headers:
+      - x-slack-req-id, retry-after
+      X-Xss-Protection:
+      - '0'
+      X-Accepted-Oauth-Scopes:
+      - chat:write:bot
+      Vary:
+      - Accept-Encoding
+      Pragma:
+      - no-cache
+      Access-Control-Allow-Headers:
+      - slack-route, x-slack-version-ts
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      Referrer-Policy:
+      - no-referrer
+      Access-Control-Allow-Origin:
+      - "*"
+      X-Via:
+      - haproxy-www-j2wg
+      X-Cache:
+      - Miss from cloudfront
+      Via:
+      - 1.1 786d821259e050ebca76b8e357819f78.cloudfront.net (CloudFront)
+      X-Amz-Cf-Pop:
+      - SEA19-C1
+      X-Amz-Cf-Id:
+      - qE88MQ6mQQukLO-0TdD3gJMAIS5vi4ZzR7oWG2RvfHilpO5KXjJB4Q==
+    body:
+      encoding: ASCII-8BIT
+      string: '{"ok":true,"channel":"DN8FXLB8E","ts":"1568319255.000100","message":{"type":"message","subtype":"bot_message","text":"hello
+        from the other side","ts":"1568319255.000100","username":"Leaves - Nicky -
+        API Project","bot_id":"BN85QTQ8P"}}'
+    http_version: 
+  recorded_at: Thu, 12 Sep 2019 20:14:15 GMT
+recorded_with: VCR 5.0.0
diff --git a/test/channel_test.rb b/test/channel_test.rb
new file mode 100644
index 00000000..910dcd75
--- /dev/null
+++ b/test/channel_test.rb
@@ -0,0 +1,43 @@
+require_relative "test_helper"
+
+describe "Channel" do
+  describe "#initialize" do
+    before do
+      @test_channel = Slack::Channel.new(name: "rubber duck", slack_id: "Ducks8", topic: "duck things", member_count: 138)
+    end
+
+    it "will return the attributes and its data type" do
+      expect(@test_channel.name).must_equal "rubber duck"
+      expect(@test_channel.slack_id).must_equal "Ducks8"
+      expect(@test_channel.topic).must_equal "duck things"
+      expect(@test_channel.member_count).must_equal 138
+
+      expect(@test_channel).must_be_instance_of Slack::Channel
+    end
+  end
+  describe "Channel.list method" do
+    it "will return a list of channels" do
+      VCR.use_cassette("channels_list") do
+        @channel_array = Slack::Channel.list
+      end
+
+      expect(@channel_array[0]["name"]).must_be_instance_of String
+      expect(@channel_array[0]["slack id"]).must_be_instance_of String
+      expect(@channel_array[0]["topic"]).must_be_instance_of String
+      expect(@channel_array[0]["member count"]).must_be_instance_of Integer
+    end
+  end
+
+  describe "Channel details method" do
+    before do
+      @test_channel = Slack::Channel.new(name: "Gossip", slack_id: "FULLOFSECRETS", topic: "Everything true or false", member_count: 100)
+    end
+    it "will return details about the selected channel" do
+      expect(@test_channel.details).must_equal "\nname: Gossip, slack_id: FULLOFSECRETS, topic: Everything true or false, member count: 100"
+    end
+
+    it "returns a string type for details" do
+      expect(@test_channel.details).must_be_instance_of String
+    end
+  end
+end
diff --git a/test/recipient_test.rb b/test/recipient_test.rb
new file mode 100644
index 00000000..cd598fd1
--- /dev/null
+++ b/test/recipient_test.rb
@@ -0,0 +1,28 @@
+require_relative "test_helper"
+
+describe "Recipient class - NotImplementedError for Template methods" do
+  it "returns NotImplementedError for details method" do
+    @recipient = Slack::Recipient.new(name: "BotBot", slack_id: "UWSJKE")
+    expect do
+      @recipient.details
+    end.must_raise NotImplementedError
+  end
+
+  it "returns NotImplementedError for Recipient.list method" do
+    expect do
+      Slack::Recipient.list
+    end.must_raise NotImplementedError
+  end
+end
+
+describe "Recipient send_message method" do
+  it "returns false if the selected channel is not valid" do
+    expect do
+      VCR.use_cassette("message_post") do
+        @recipient = Slack::Recipient.new(name: "harold", slack_id: "UN69ewrkjwer")
+        @response = @recipient.send_message("Adorable doggos")
+        @response["ok"]
+      end.must_raise SlackApiError, ("Invalid request. Error is 200: OK")
+    end
+  end
+end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 90aeb408..71907cdf 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,17 +1,32 @@
-require 'simplecov'
+require "simplecov"
 SimpleCov.start do
-  add_filter 'test/'
+  add_filter "test/"
 end
 
-require 'minitest'
-require 'minitest/autorun'
-require 'minitest/reporters'
-require 'minitest/skip_dsl'
-require 'vcr'
+require "minitest"
+require "minitest/autorun"
+require "minitest/reporters"
+require "minitest/skip_dsl"
+require "vcr"
+require "dotenv"
+require "webmock/minitest"
 
 Minitest::Reporters.use! Minitest::Reporters::SpecReporter.new
 
+require_relative "../lib/channel.rb"
+require_relative "../lib/user.rb"
+require_relative "../lib/recipient.rb"
+require_relative "../lib/workspace.rb"
+
 VCR.configure do |config|
   config.cassette_library_dir = "test/cassettes"
   config.hook_into :webmock
+  config.default_cassette_options = {
+    :record => :new_episodes,    # record new data when we don't have it yet
+    :match_requests_on => [:method, :uri, :body], # The http method, URI and body of a request all need to match
+  }
+  # Don't leave our token lying around in a cassette file.
+  config.filter_sensitive_data("<SLACK_TOKEN>") do
+    ENV["SLACK_TOKEN"]
+  end
 end
diff --git a/test/user_test.rb b/test/user_test.rb
new file mode 100644
index 00000000..a1862dc6
--- /dev/null
+++ b/test/user_test.rb
@@ -0,0 +1,41 @@
+require_relative "test_helper"
+
+describe "User" do
+  describe "#initialize" do
+    before do
+      @test_user = Slack::User.new(name: "johnk", slack_id: "UB39ALK", real_name: "John")
+    end
+
+    it "will return the attributes and its data type" do
+      expect(@test_user.name).must_equal "johnk"
+      expect(@test_user.slack_id).must_equal "UB39ALK"
+      expect(@test_user.real_name).must_equal "John"
+
+      expect(@test_user).must_be_instance_of Slack::User
+    end
+  end
+  describe "User.list method" do
+    it "will return a list of users" do
+      VCR.use_cassette("users_list") do
+        @user_array = Slack::User.list
+      end
+
+      expect(@user_array[0]["real name"]).must_be_instance_of String
+      expect(@user_array[0]["user name"]).must_be_instance_of String
+      expect(@user_array[0]["slack id"]).must_be_instance_of String
+    end
+  end
+
+  describe "User details method" do
+    before do
+      @test_user = Slack::User.new(name: "Franky", slack_id: "FRANKRUS", real_name: "Frankenstein")
+    end
+    it "will return details about the selected user" do
+      expect(@test_user.details).must_equal "\nreal name: Frankenstein, user name: Franky, slack_id: FRANKRUS"
+    end
+
+    it "returns a string type for details" do
+      expect(@test_user.details).must_be_instance_of String
+    end
+  end
+end
diff --git a/test/workspace_test.rb b/test/workspace_test.rb
new file mode 100644
index 00000000..15c2ef9f
--- /dev/null
+++ b/test/workspace_test.rb
@@ -0,0 +1,142 @@
+require_relative "test_helper"
+
+describe "User methods" do
+  before do
+    VCR.use_cassette("users_list") do
+      @user_array = Slack::User.list
+      @workspace = Slack::Workspace.new
+    end
+  end
+
+  it "users is list of type User" do
+    expect(@workspace.users.all? { |user| user.is_a?(Slack::User) }).must_equal true
+  end
+
+  it "will select a user by name" do
+    @workspace.select_user("slackbot")
+    expect(@workspace.selected.is_a?(Slack::User)).must_equal true
+  end
+
+  it "will select a user by slack_id" do
+    @workspace.select_user("USLACKBOT")
+    expect(@workspace.selected.is_a?(Slack::User)).must_equal true
+  end
+
+  it "raises an error if a valid user is not found" do
+    expect do
+      @selected = @workspace.select_user("asjdakwjrer")
+    end.must_raise SlackApiError
+  end
+end
+
+describe "Channel methods" do
+  before do
+    VCR.use_cassette("channels_list") do
+      @channel_array = Slack::Channel.list
+      @workspace = Slack::Workspace.new
+    end
+  end
+
+  it "channels is a list of type Channel" do
+    expect(@workspace.channels.all? { |channel| channel.is_a?(Slack::Channel) }).must_equal true
+  end
+
+  it "will select a channel by name" do
+    @workspace.select_channel("fuzzy_bunnies")
+    expect(@workspace.selected.is_a?(Slack::Channel)).must_equal true
+  end
+
+  it "will select a channel by slack_id" do
+    @workspace.select_channel("CN759T0MA")
+    expect(@workspace.selected.is_a?(Slack::Channel)).must_equal true
+  end
+
+  it "raises an error if a valid channel is not found" do
+    expect do
+      @selected = @workspace.select_channel("cute dogs")
+    end.must_raise SlackApiError
+  end
+end
+
+describe "show_details method" do
+  before do
+    VCR.use_cassette("channels_list") do
+      @channel_array = Slack::Channel.list
+      @workspace = Slack::Workspace.new
+    end
+  end
+
+  it "returns the selected channel's details" do
+    @workspace.select_channel("fuzzy_bunnies")
+    expect(@workspace.show_details).must_be_kind_of String
+  end
+
+  it "returns the selected user's details" do
+    @workspace.select_user("idhallie")
+    expect(@workspace.show_details).must_be_kind_of String
+  end
+end
+
+describe "send_message method" do
+  it "sends a message to the chosen channel" do
+    VCR.use_cassette("channels_list") do
+      @channel_array = Slack::Channel.list
+      @workspace = Slack::Workspace.new
+      body = {
+        token: ENV["SLACK_TOKEN"],
+        channel: "fuzzy_bunnies",
+        text: "hello from the other side",
+      }
+
+      @response = HTTParty.post(MESSAGE_URL, body: body)
+    end
+
+    expect(@response).must_be_kind_of HTTParty::Response
+  end
+
+  it "sends a message to the chosen user" do
+    VCR.use_cassette("users_list") do
+      @user_array = Slack::User.list
+      @workspace = Slack::Workspace.new
+      body = {
+        token: ENV["SLACK_TOKEN"],
+        channel: "UN69TR3N1",
+        text: "hello from the other side",
+      }
+
+      @response = HTTParty.post(MESSAGE_URL, body: body)
+    end
+
+    expect(@response).must_be_kind_of HTTParty::Response
+  end
+
+  it "returns true if the selected channel is valid and sends a message" do
+    VCR.use_cassette("message_post") do
+      @workspace = Slack::Workspace.new
+      @selected = @workspace.select_channel("apis")
+      @response = @workspace.send_message("Helllooo")
+    end
+
+    expect(@response["ok"]).must_equal true
+  end
+
+  it "returns true if the selected user is valid and sends a message" do
+    VCR.use_cassette("message_post") do
+      @workspace = Slack::Workspace.new
+      @selected = @workspace.select_user("nickyjinchoi")
+      @response = @workspace.send_message("Helllooo. What's uppp?")
+    end
+
+    expect(@response["ok"]).must_equal true
+  end
+
+  it "returns nil if a recipient has not been selected" do
+    VCR.use_cassette("message_post") do
+      @workspace = Slack::Workspace.new
+      @selected = nil
+      @response = @workspace.send_message("This will go nowhere")
+    end
+
+    expect(@response).must_be_nil
+  end
+end