add partial render method

This enables the user to render partial templates to embed them into
other templates and the like.

2 files changed, 56 insertions, 32 deletions

diff --git a/spec/unit/zero/renderer/render_partial_spec.rb b/spec/unit/zero/renderer/render_partial_spec.rb
new file mode 100644
index 0000000..a4c38c8
--- /dev/null
+++ b/spec/unit/zero/renderer/render_partial_spec.rb
@@ -0,0 +1,53 @@
+require 'spec_helper'
+
+describe Zero::Renderer, '#render' do
+  subject { described_class.new(template_path, type_map) }
+  let(:template_path) { 'spec/fixtures/templates/' }
+  let(:type_map) {{
+    'html' => ['text/html', 'text/xml', '*/*'],
+    'json' => ['application/json', 'plain/text']
+  }}
+  let(:html_types) { ['text/html'] }
+  let(:json_types) { ['application/json'] }
+  let(:foo_types)  { ['foo/bar', 'bar/foo'] }
+  let(:binding) { SpecTemplateContext.new('foo') }
+
+  it 'returns a tilt template' do
+    expect(subject.render_partial('index', html_types, binding)
+          ).to be_kind_of(String)
+  end
+
+  it 'renders html content' do
+    expect(subject.render_partial('index', html_types, binding)
+          ).to match('success')
+  end
+
+  it 'returns a tilt template for different types' do
+    expect(subject.render_partial('index', json_types, binding)
+          ).to be_kind_of(String)
+  end
+
+  it 'renders json content' do
+    expect(subject.render_partial('index', json_types, binding)
+          ).to match("{text: 'success'}")
+  end
+
+  it 'returns an ArgumentError, if given template does not exist' do
+    expect {
+      subject.render_partial('foobar', html_types, binding)
+    }.to raise_error(ArgumentError, /Template 'foobar' does not exist/)
+  end
+
+  it 'returns an ArgumentError, if no template fits types' do
+    expect {
+      subject.render_partial('index', foo_types, binding)
+    }.to raise_error(
+      ArgumentError, /Template 'index' not found/)
+  end
+
+  it 'uses the context' do
+    expect(subject.render_partial('context', html_types, binding)
+          ).to match('foo')
+
+  end
+end
diff --git a/spec/unit/zero/renderer/render_spec.rb b/spec/unit/zero/renderer/render_spec.rb
index ed11857..6023eb8 100644
--- a/spec/unit/zero/renderer/render_spec.rb
+++ b/spec/unit/zero/renderer/render_spec.rb
@@ -13,38 +13,9 @@ describe Zero::Renderer, '#render' do
   let(:binding) { SpecTemplateContext.new('foo') }
 
   context 'with default layout' do
-    it 'returns a tilt template' do
-      subject.render('index', html_types, binding).should be_kind_of(String)
-    end
-
-    it 'renders html content' do
-      subject.render('index', html_types, binding).should match('success')
-    end
-
-    it 'returns a tilt template for different types' do
-      subject.render('index', json_types, binding).should be_kind_of(String)
-    end
-
-    it 'renders json content' do
-      subject.render('index', json_types, binding).should match("{text: 'success'}")
-    end
-
-    it 'returns an ArgumentError, if given template does not exist' do
-      expect {
-        subject.render('foobar', html_types, binding)
-      }.to raise_error(ArgumentError, /Template 'foobar' does not exist/)
-    end
-
-    it 'returns an ArgumentError, if no template fits types' do
-      expect {
-        subject.render('index', foo_types, binding)
-      }.to raise_error(
-        ArgumentError, /Template 'index' not found/)
-    end
-
-    it 'uses the context' do
-      subject.render('context', html_types, binding).should match('foo')
-
+    it 'renders the template' do
+      expect(subject.render('index', html_types, binding)
+            ).to match(/layoutfile[\n]*success/)
     end
   end