2 files changed, 40 insertions, 0 deletions
diff --git a/src/app.test.ts b/src/app.test.ts
index 59ed352..94bf205 100644
--- a/src/app.test.ts
+++ b/src/app.test.ts
@@ -92,6 +92,28 @@ describe("sidebar fragment", () => {
   });
 });
 
+describe("blob view", () => {
+  const blob = {
+    repo: { owner: "justrajdeep", name: "fonts" },
+    branch: "master",
+    path: "Times New Roman.ttf",
+    language: null,
+    size: "815 KB",
+    image: false,
+    textLines: null,
+    htmlLines: null,
+    htmlContent: null,
+  };
+
+  // GitHub previews neither the text nor the bytes of most binary files.
+  it("should offer the raw file when there is nothing to display", () => {
+    const html = eta.render("blob.eta", blob);
+
+    assert.match(html, /This file cannot be displayed\./);
+    assert.match(html, /href="\/justrajdeep\/fonts\/raw\/master\/Times New Roman.ttf">View raw/);
+  });
+});
+
 describe("redirects to GitHub", () => {
   // An HTTP redirect would be caught by the extension's declarativeNetRequest
   // rules and bounced straight back here.
diff --git a/src/scraper.test.ts b/src/scraper.test.ts
index 24fdfc0..836235e 100644
--- a/src/scraper.test.ts
+++ b/src/scraper.test.ts
@@ -332,6 +332,24 @@ describe("GitHub scraper", () => {
       assert.strictEqual(data.htmlLines, null);
       assert.strictEqual(data.htmlContent, null);
     });
+
+    // A binary file GitHub has no preview for: no content of any kind, and the
+    // path exercises escaping of a space.
+    it("should support an unpreviewable binary file", async () => {
+      const data = await getGitHubBlob("justrajdeep", "fonts", "master", "Times New Roman.ttf");
+
+      assert.strictEqual(data.repo.owner, "justrajdeep");
+      assert.strictEqual(data.repo.name, "fonts");
+      assert.strictEqual(data.branch, "master");
+      assert.strictEqual(data.path, "Times New Roman.ttf");
+
+      assert.strictEqual(data.size, "815 KB");
+      assert.strictEqual(data.language, null);
+      assert.strictEqual(data.image, false);
+      assert.strictEqual(data.textLines, null);
+      assert.strictEqual(data.htmlLines, null);
+      assert.strictEqual(data.htmlContent, null);
+    });
   });
 
   describe("owner pages", () => {