add specs

Author: DannyBen

spec/completely/completions_spec.rb

@@ -4,6 +4,13 @@
   let(:path) { "spec/fixtures/#{file}.yaml" }
   let(:file) { 'basic' }
 
+  describe '::read' do
+    it 'reads from io' do
+      io = double :io, read: "cli: [--help, --version]"
+      expect(described_class.read(io).config.config).to eq({ 'cli' => %w[--help --version] })
+    end
+  end
+
   describe '#valid?' do
     context 'when all patterns start with the same word' do
       it 'returns true' do

spec/completely/config_spec.rb

@@ -3,6 +3,27 @@
 
   let(:path) { "spec/fixtures/#{file}.yaml" }
   let(:file) { 'nested' }
+  let(:config_string) { "cli: [--help, --version]" }
+  let(:config_hash) { { 'cli' => %w[--help --version] } }
+
+  describe '::parse' do
+    it 'loads config from string' do
+      expect(described_class.parse(config_string).config).to eq config_hash
+    end
+
+    context 'when the string is not a valid YAML' do
+      it 'raises ParseError' do
+        expect { described_class.parse("not: a: yaml") }.to raise_error(Completely::ParseError)
+      end
+    end
+  end
+
+  describe '::read' do
+    it 'loads config from io' do
+      io = double :io, read: config_string
+      expect(described_class.read(io).config).to eq config_hash
+    end
+  end
 
   describe '#flat_config' do
     it 'returns a flat pattern => completions hash' do