Put shared examples in own files

spec/integration/rambling/trie_spec.rb

@@ -1,55 +1,6 @@
 require 'spec_helper'
 
 describe Rambling::Trie do
-  shared_examples_for 'a compressable trie' do
-    context 'and the trie is not compressed' do
-      it_behaves_like 'a trie data structure'
-
-      it 'does not alter the input' do
-        word = 'string'
-        trie.add word
-
-        expect(word).to eq 'string'
-      end
-
-      it 'is marked as not compressed' do
-        expect(trie).not_to be_compressed
-      end
-    end
-
-    context 'and the trie is compressed' do
-      before { trie.compress! }
-
-      it_behaves_like 'a trie data structure'
-
-      it 'is marked as compressed' do
-        expect(trie).to be_compressed
-      end
-    end
-  end
-
-  shared_examples_for 'a trie data structure' do
-    it 'contains all the words from the file' do
-      words.each do |word|
-        expect(trie).to include word
-        expect(trie.word? word).to be true
-      end
-    end
-
-    it 'matches the start of all the words from the file' do
-      words.each do |word|
-        expect(trie.match? word).to be true
-        expect(trie.match? word[0..-2]).to be true
-        expect(trie.partial_word? word).to be true
-        expect(trie.partial_word? word[0..-2]).to be true
-      end
-    end
-
-    it 'allows iterating over all the words' do
-      expect(trie.to_a.sort).to eq words.sort
-    end
-  end
-
   describe 'with words provided directly' do
     it_behaves_like 'a compressable trie' do
       let(:words) { %w[a couple of words for our full trie integration test] }
@@ -80,33 +31,6 @@
     end
   end
 
-  shared_examples_for 'a serializable trie' do
-    context 'and the trie is not compressed' do
-      before do
-        Rambling::Trie.dump trie_to_serialize, trie_filepath, serializer
-      end
-
-      it_behaves_like 'a compressable trie' do
-        let(:trie) { loaded_trie }
-      end
-    end
-
-    context 'and the trie is compressed' do
-      let(:trie) { loaded_trie }
-
-      before do
-        FileUtils.rm_f trie_filepath
-        Rambling::Trie.dump trie_to_serialize.compress!, trie_filepath, serializer
-      end
-
-      it_behaves_like 'a trie data structure'
-
-      it 'is marked as compressed' do
-        expect(trie).to be_compressed
-      end
-    end
-  end
-
   describe 'saving and loading full trie from a file' do
     let(:words_filepath) { File.join ::SPEC_ROOT, 'assets', 'test_words.en_US.txt' }
     let(:words) { File.readlines(words_filepath).map &:chomp! }

spec/spec_helper.rb

@@ -28,4 +28,7 @@
 end
 
 require 'support/config'
+require 'support/shared_examples/a_compressable_trie'
+require 'support/shared_examples/a_serializable_trie'
 require 'support/shared_examples/a_serializer'
+require 'support/shared_examples/a_trie_data_structure'

spec/support/shared_examples/a_compressable_trie.rb

@@ -0,0 +1,26 @@
+shared_examples_for 'a compressable trie' do
+  context 'and the trie is not compressed' do
+    it_behaves_like 'a trie data structure'
+
+    it 'does not alter the input' do
+      word = 'string'
+      trie.add word
+
+      expect(word).to eq 'string'
+    end
+
+    it 'is marked as not compressed' do
+      expect(trie).not_to be_compressed
+    end
+  end
+
+  context 'and the trie is compressed' do
+    before { trie.compress! }
+
+    it_behaves_like 'a trie data structure'
+
+    it 'is marked as compressed' do
+      expect(trie).to be_compressed
+    end
+  end
+end

spec/support/shared_examples/a_serializable_trie.rb

@@ -0,0 +1,26 @@
+shared_examples_for 'a serializable trie' do
+  context 'and the trie is not compressed' do
+    before do
+      Rambling::Trie.dump trie_to_serialize, trie_filepath, serializer
+    end
+
+    it_behaves_like 'a compressable trie' do
+      let(:trie) { loaded_trie }
+    end
+  end
+
+  context 'and the trie is compressed' do
+    let(:trie) { loaded_trie }
+
+    before do
+      FileUtils.rm_f trie_filepath
+      Rambling::Trie.dump trie_to_serialize.compress!, trie_filepath, serializer
+    end
+
+    it_behaves_like 'a trie data structure'
+
+    it 'is marked as compressed' do
+      expect(trie).to be_compressed
+    end
+  end
+end

spec/support/shared_examples/a_trie_data_structure.rb

@@ -0,0 +1,21 @@
+shared_examples_for 'a trie data structure' do
+  it 'contains all the words from the file' do
+    words.each do |word|
+      expect(trie).to include word
+      expect(trie.word? word).to be true
+    end
+  end
+
+  it 'matches the start of all the words from the file' do
+    words.each do |word|
+      expect(trie.match? word).to be true
+      expect(trie.match? word[0..-2]).to be true
+      expect(trie.partial_word? word).to be true
+      expect(trie.partial_word? word[0..-2]).to be true
+    end
+  end
+
+  it 'allows iterating over all the words' do
+    expect(trie.to_a.sort).to eq words.sort
+  end
+end