diff --git a/spec/support/jasmine.json b/spec/support/jasmine.json
index 5043a9a03..85189e03b 100644
--- a/spec/support/jasmine.json
+++ b/spec/support/jasmine.json
@@ -1,6 +1,9 @@
 {
-  "spec_dir": "spec",
-  "spec_files": ["./**/*.spec.ts"],
+  "spec_dir": "",
+  "spec_files": [
+    "spec/**/*.spec.ts",
+    "src/**/*.spec.ts"
+  ],
   "helpers": ["helpers/**/*.js"],
   "stopSpecOnExpectationFailure": false,
   "random": true
diff --git a/src/share/content_renderer.spec.ts b/src/share/content_renderer.spec.ts
new file mode 100644
index 000000000..d79cd7840
--- /dev/null
+++ b/src/share/content_renderer.spec.ts
@@ -0,0 +1,33 @@
+import { renderCode, type Result } from "./content_renderer.js";
+
+describe("content_renderer", () => {
+    describe("renderCode", () => {
+        it("identifies empty content", () => {
+            const emptyResult: Result = {
+                header: "",
+                content: "   "
+            };
+            renderCode(emptyResult);
+            expect(emptyResult.isEmpty).toBeTrue();
+        });
+
+        it("identifies unsupported content type", () => {
+            const emptyResult: Result = {
+                header: "",
+                content: Buffer.from("Hello world")
+            };
+            renderCode(emptyResult);
+            expect(emptyResult.isEmpty).toBeTrue();
+        });
+
+        it("wraps code in <pre>", () => {
+            const result: Result = {
+                header: "",
+                content: "\tHello\nworld"
+            };
+            renderCode(result);
+            expect(result.isEmpty).toBeFalsy();
+            expect(result.content).toBe("<pre>\tHello\nworld</pre>");
+        });
+    });
+});
diff --git a/src/share/content_renderer.ts b/src/share/content_renderer.ts
index 6680bacda..c9c17b67f 100644
--- a/src/share/content_renderer.ts
+++ b/src/share/content_renderer.ts
@@ -5,10 +5,14 @@ import shareRoot from "./share_root.js";
 import escapeHtml from "escape-html";
 import SNote from "./shaca/entities/snote.js";
 
-interface Result {
+/**
+ * Represents the output of the content renderer.
+ */
+export interface Result {
     header: string;
     content: string | Buffer | undefined;
-    isEmpty: boolean;
+    /** Set to `true` if the provided content should be rendered as empty. */
+    isEmpty?: boolean;
 }
 
 function getContent(note: SNote) {
@@ -137,7 +141,10 @@ function handleAttachmentLink(linkEl: HTMLAnchorElement, href: string) {
     }
 }
 
-function renderCode(result: Result) {
+/**
+ * Renders a code note.
+ */
+export function renderCode(result: Result) {
     if (typeof result.content !== "string" || !result.content?.trim()) {
         result.isEmpty = true;
     } else {