Move workstation_config_loader into chef-configmcquin/chef-config/workstation-config-loader

1 files changed, 286 insertions, 0 deletions

diff --git a/chef-config/spec/unit/workstation_config_loader_spec.rb b/chef-config/spec/unit/workstation_config_loader_spec.rb
new file mode 100644
index 0000000000..f247d1cac2
--- /dev/null
+++ b/chef-config/spec/unit/workstation_config_loader_spec.rb
@@ -0,0 +1,286 @@
+#
+# Author:: Daniel DeLeo (<dan@getchef.com>)
+# Copyright:: Copyright (c) 2014 Chef Software, Inc.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require 'spec_helper'
+require 'tempfile'
+
+require 'chef-config/exceptions'
+require 'chef-config/windows'
+require 'chef-config/workstation_config_loader'
+
+RSpec.describe ChefConfig::WorkstationConfigLoader do
+
+  let(:explicit_config_location) { nil }
+
+  let(:env) { {} }
+
+  let(:config_loader) do
+    described_class.new(explicit_config_location).tap do |c|
+      allow(c).to receive(:env).and_return(env)
+    end
+  end
+
+  # Test methods that do I/O or reference external state which are stubbed out
+  # elsewhere.
+  describe "external dependencies" do
+    let(:config_loader) { described_class.new(nil) }
+
+    it "delegates to ENV for env" do
+      expect(config_loader.env).to equal(ENV)
+    end
+
+    it "tests a path's existence" do
+      expect(config_loader.path_exists?('/nope/nope/nope/nope/frab/jab/nab')).to be(false)
+      expect(config_loader.path_exists?(__FILE__)).to be(true)
+    end
+
+  end
+
+  describe "locating the config file" do
+    context "without an explicit config" do
+
+      before do
+        allow(config_loader).to receive(:path_exists?).with(an_instance_of(String)).and_return(false)
+      end
+
+      it "has no config if HOME is not set" do
+        expect(config_loader.config_location).to be(nil)
+        expect(config_loader.no_config_found?).to be(true)
+      end
+
+      context "when HOME is set and contains a knife.rb" do
+
+        let(:home) { "/Users/example.user" }
+
+        before do
+          allow(ChefConfig::PathHelper).to receive(:home).with('.chef').and_yield(File.join(home, '.chef'))
+          allow(config_loader).to receive(:path_exists?).with("#{home}/.chef/knife.rb").and_return(true)
+        end
+
+        it "uses the config in HOME/.chef/knife.rb" do
+          expect(config_loader.config_location).to eq("#{home}/.chef/knife.rb")
+        end
+
+        context "and has a config.rb" do
+
+          before do
+            allow(config_loader).to receive(:path_exists?).with("#{home}/.chef/config.rb").and_return(true)
+          end
+
+          it "uses the config in HOME/.chef/config.rb" do
+            expect(config_loader.config_location).to eq("#{home}/.chef/config.rb")
+          end
+
+          context "and/or a parent dir contains a .chef dir" do
+
+            let(:env_pwd) { "/path/to/cwd" }
+
+            before do
+              if ChefConfig.windows?
+                env["CD"] = env_pwd
+              else
+                env["PWD"] = env_pwd
+              end
+
+              allow(config_loader).to receive(:path_exists?).with("#{env_pwd}/.chef/knife.rb").and_return(true)
+              allow(File).to receive(:exist?).with("#{env_pwd}/.chef").and_return(true)
+              allow(File).to receive(:directory?).with("#{env_pwd}/.chef").and_return(true)
+            end
+
+            it "prefers the config from parent_dir/.chef" do
+              expect(config_loader.config_location).to eq("#{env_pwd}/.chef/knife.rb")
+            end
+
+            context "and the parent dir's .chef dir has a config.rb" do
+
+              before do
+                allow(config_loader).to receive(:path_exists?).with("#{env_pwd}/.chef/config.rb").and_return(true)
+              end
+
+              it "prefers the config from parent_dir/.chef" do
+                expect(config_loader.config_location).to eq("#{env_pwd}/.chef/config.rb")
+              end
+
+              context "and/or the current working directory contains a .chef dir" do
+
+                let(:cwd) { Dir.pwd }
+
+                before do
+                  allow(config_loader).to receive(:path_exists?).with("#{cwd}/knife.rb").and_return(true)
+                end
+
+                it "prefers a knife.rb located in the cwd" do
+                  expect(config_loader.config_location).to eq("#{cwd}/knife.rb")
+                end
+
+                context "and the CWD's .chef dir has a config.rb" do
+
+                  before do
+                    allow(config_loader).to receive(:path_exists?).with("#{cwd}/config.rb").and_return(true)
+                  end
+
+                  it "prefers a config located in the cwd" do
+                    expect(config_loader.config_location).to eq("#{cwd}/config.rb")
+                  end
+
+
+                  context "and/or KNIFE_HOME is set" do
+
+                    let(:knife_home) { "/path/to/knife/home" }
+
+                    before do
+                      env["KNIFE_HOME"] = knife_home
+                      allow(config_loader).to receive(:path_exists?).with("#{knife_home}/knife.rb").and_return(true)
+                    end
+
+                    it "prefers a knife located in KNIFE_HOME" do
+                      expect(config_loader.config_location).to eq("/path/to/knife/home/knife.rb")
+                    end
+
+                    context "and KNIFE_HOME contains a config.rb" do
+
+                      before do
+                        env["KNIFE_HOME"] = knife_home
+                        allow(config_loader).to receive(:path_exists?).with("#{knife_home}/config.rb").and_return(true)
+                      end
+
+                      it "prefers a config.rb located in KNIFE_HOME" do
+                        expect(config_loader.config_location).to eq("/path/to/knife/home/config.rb")
+                      end
+
+                    end
+
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+
+      context "when the current working dir is inside a symlinked directory" do
+        before do
+          # pwd according to your shell is /home/someuser/prod/chef-repo, but
+          # chef-repo is a symlink to /home/someuser/codes/chef-repo
+          env["CD"] = "/home/someuser/prod/chef-repo" # windows
+          env["PWD"] = "/home/someuser/prod/chef-repo" # unix
+
+          allow(Dir).to receive(:pwd).and_return("/home/someuser/codes/chef-repo")
+        end
+
+        it "loads the config from the non-dereferenced directory path" do
+          expect(File).to receive(:exist?).with("/home/someuser/prod/chef-repo/.chef").and_return(false)
+          expect(File).to receive(:exist?).with("/home/someuser/prod/.chef").and_return(true)
+          expect(File).to receive(:directory?).with("/home/someuser/prod/.chef").and_return(true)
+
+          expect(config_loader).to receive(:path_exists?).with("/home/someuser/prod/.chef/knife.rb").and_return(true)
+
+          expect(config_loader.config_location).to eq("/home/someuser/prod/.chef/knife.rb")
+        end
+      end
+    end
+
+    context "when given an explicit config to load" do
+
+      let(:explicit_config_location) { "/path/to/explicit/config.rb" }
+
+      it "prefers the explicit config" do
+        expect(config_loader.config_location).to eq(explicit_config_location)
+      end
+
+    end
+  end
+
+
+  describe "loading the config file" do
+
+    context "when no explicit config is specifed and no implicit config is found" do
+
+      before do
+        allow(config_loader).to receive(:path_exists?).with(an_instance_of(String)).and_return(false)
+      end
+
+      it "skips loading" do
+        expect(config_loader.config_location).to be(nil)
+        expect(config_loader.load).to be(false)
+      end
+
+    end
+
+    context "when an explicit config is given but it doesn't exist" do
+
+      let(:explicit_config_location) { "/nope/nope/nope/frab/jab/nab" }
+
+      it "raises a configuration error" do
+        expect { config_loader.load }.to raise_error(ChefConfig::ConfigurationError)
+      end
+
+    end
+
+    context "when the config file exists" do
+
+      let(:config_content) { "" }
+
+      let(:explicit_config_location) do
+        # could use described_class, but remove all ':' from the path if so.
+        t = Tempfile.new("Chef-WorkstationConfigLoader-rspec-test")
+        t.print(config_content)
+        t.close
+        t.path
+      end
+
+      after { File.unlink(explicit_config_location) if File.exist?(explicit_config_location) }
+
+      context "and is valid" do
+
+        let(:config_content) { "config_file_evaluated(true)" }
+
+        it "loads the config" do
+          expect(config_loader.load).to be(true)
+          expect(ChefConfig::Config.config_file_evaluated).to be(true)
+        end
+
+        it "sets ChefConfig::Config.config_file" do
+          config_loader.load
+          expect(ChefConfig::Config.config_file).to eq(explicit_config_location)
+        end
+      end
+
+      context "and has a syntax error" do
+
+        let(:config_content) { "{{{{{:{{" }
+
+        it "raises a ConfigurationError" do
+          expect { config_loader.load }.to raise_error(ChefConfig::ConfigurationError)
+        end
+      end
+
+      context "and raises a ruby exception during evaluation" do
+
+        let(:config_content) { ":foo\n:bar\nraise 'oops'\n:baz\n" }
+
+        it "raises a ConfigurationError" do
+          expect { config_loader.load }.to raise_error(ChefConfig::ConfigurationError)
+        end
+      end
+
+    end
+
+  end
+
+end