Adds spec for YAML-parsing of multilines

spec/yaml_spec.rb

@@ -0,0 +1,109 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'YAML spec' do
+  describe 'emoji retention' do
+    let(:yaml) do
+      {
+        'a' => 'hello %{world}😀',
+        'b' => 'foo',
+        'c' => {
+          'd' => 'hello %{name}'
+        },
+        'e' => 'ok'
+      }
+    end
+
+    it 'does not strip emojis from yaml' do
+      dumped_yaml = I18n::Tasks::Data::Adapter::YamlAdapter.dump(yaml, {})
+      expect(dumped_yaml).to include('😀')
+    end
+  end
+
+  describe 'parsing multiline' do
+    # https://yaml-multiline.info
+    # This spec checks the behaviour of parsing and dumping multiline strings
+    # It would be preferable if we could get the same symbols used after dumping
+    # But this is the default YAML behaviour.
+    let(:source) do
+      <<~YAML
+        ---
+        en:
+          literal: |
+            hello
+            world
+
+            newline
+          literal_strip: |-
+            hello
+            world
+
+            newline
+          literal_keep: |+
+            hello
+            world
+
+            newline
+          folded: >
+            hello
+            world
+
+            newline
+          folded_strip: >-
+            hello
+            world
+
+            newline
+          folded_keep: >+
+            hello
+            world
+
+            newline
+      YAML
+    end
+
+    it 'parses multiline strings' do
+      parsed = I18n::Tasks::Data::Adapter::YamlAdapter.parse(source, {})
+
+      expect(parsed.dig('en', 'literal')).to eq("hello\nworld\n\nnewline\n")
+      expect(parsed.dig('en', 'literal_strip')).to eq("hello\nworld\n\nnewline")
+      expect(parsed.dig('en', 'literal_keep')).to eq("hello\nworld\n\nnewline\n")
+      expect(parsed.dig('en', 'folded')).to eq("hello world\nnewline\n")
+      expect(parsed.dig('en', 'folded_strip')).to eq("hello world\nnewline")
+      expect(parsed.dig('en', 'folded_keep')).to eq("hello world\nnewline\n")
+
+      expected = <<~YAML
+      ---
+      en:
+        literal: |
+          hello
+          world
+
+          newline
+        literal_strip: |-
+          hello
+          world
+
+          newline
+        literal_keep: |
+          hello
+          world
+
+          newline
+        folded: |
+          hello world
+          newline
+        folded_strip: |-
+          hello world
+          newline
+        folded_keep: |
+          hello world
+          newline
+      YAML
+
+      dumped = I18n::Tasks::Data::Adapter::YamlAdapter.dump(parsed, {})
+      expect(dumped).to eq(expected)
+    end
+  end
+end