4 files changed, 93 insertions, 0 deletions
diff --git a/spec/javascripts/blob/pdf/index_spec.js b/spec/javascripts/blob/pdf/index_spec.js
new file mode 100644
index 00000000000..19a4e55a9db
--- /dev/null
+++ b/spec/javascripts/blob/pdf/index_spec.js
@@ -0,0 +1,72 @@
+import renderPDF from '~/blob/pdf';
+import testPDF from './test.pdf';
+
+describe('PDF renderer', () => {
+  let viewer;
+  preloadFixtures('static/pdf_viewer.html.raw');
+
+  beforeEach(() => {
+    loadFixtures('static/pdf_viewer.html.raw');
+    viewer = document.getElementById('js-pdf-viewer');
+    viewer.dataset.endpoint = testPDF;
+  });
+
+  it('shows loading icon', () => {
+    renderPDF();
+
+    expect(
+      document.querySelector('.loading'),
+    ).not.toBeNull();
+  });
+
+  describe('successful response', () => {
+    beforeEach((done) => {
+      renderPDF();
+
+      setTimeout(() => {
+        done();
+      }, 500);
+    });
+
+    it('does not show loading icon', () => {
+      expect(
+        document.querySelector('.loading'),
+      ).toBeNull();
+    });
+
+    it('renders the PDF', () => {
+      expect(
+        document.querySelector('.pdf-viewer'),
+      ).not.toBeNull();
+    });
+
+    it('renders the PDF page', () => {
+      expect(
+        document.querySelector('.pdf-page'),
+      ).not.toBeNull();
+    });
+  });
+
+  describe('error getting file', () => {
+    beforeEach((done) => {
+      viewer.dataset.endpoint = 'invalid/endpoint';
+      renderPDF();
+
+      setTimeout(() => {
+        done();
+      }, 500);
+    });
+
+    it('does not show loading icon', () => {
+      expect(
+        document.querySelector('.loading'),
+      ).toBeNull();
+    });
+
+    it('shows error message', () => {
+      expect(
+        document.querySelector('.md').textContent.trim(),
+      ).toBe('An error occured whilst loading the file. Please try again later.');
+    });
+  });
+});
diff --git a/spec/javascripts/blob/pdf/test.pdf b/spec/javascripts/blob/pdf/test.pdf
new file mode 100644
index 00000000000..eb3d147fde3
--- /dev/null
+++ b/spec/javascripts/blob/pdf/test.pdf
diff --git a/spec/javascripts/fixtures/pdf_viewer.html.haml b/spec/javascripts/fixtures/pdf_viewer.html.haml
new file mode 100644
index 00000000000..2e57beae54b
--- /dev/null
+++ b/spec/javascripts/fixtures/pdf_viewer.html.haml
@@ -0,0 +1 @@
+.file-content#js-pdf-viewer{ data: { endpoint: '/test' } }
diff --git a/spec/models/blob_spec.rb b/spec/models/blob_spec.rb
index ba110383977..09b1fda3796 100644
--- a/spec/models/blob_spec.rb
+++ b/spec/models/blob_spec.rb
@@ -53,6 +53,20 @@ describe Blob do
     end
   end
 
+  describe '#pdf?' do
+    it 'is falsey when file extension is not .pdf' do
+      git_blob = double(name: 'git_blob.txt')
+
+      expect(described_class.decorate(git_blob)).not_to be_pdf
+    end
+
+    it 'is truthy when file extension is .pdf' do
+      git_blob = double(name: 'git_blob.pdf')
+
+      expect(described_class.decorate(git_blob)).to be_pdf
+    end
+  end
+
   describe '#ipython_notebook?' do
     it 'is falsey when language is not Jupyter Notebook' do
       git_blob = double(text?: true, language: double(name: 'JSON'))
@@ -102,6 +116,7 @@ describe Blob do
 
     def stubbed_blob(overrides = {})
       overrides.reverse_merge!(
+        name: nil,
         image?: false,
         language: nil,
         lfs_pointer?: false,
@@ -146,6 +161,11 @@ describe Blob do
       expect(blob.to_partial_path(project)).to eq 'download'
     end
 
+    it 'handles PDFs' do
+      blob = stubbed_blob(name: 'blob.pdf', pdf?: true)
+      expect(blob.to_partial_path(project)).to eq 'pdf'
+    end
+
     it 'handles iPython notebooks' do
       blob = stubbed_blob(text?: true, ipython_notebook?: true)
       expect(blob.to_partial_path(project)).to eq 'notebook'