From 152d9dc36c64d04d5126340de264a8d8e6976aec Mon Sep 17 00:00:00 2001
From: Hazelnoot <acomputerdog@gmail.com>
Date: Fri, 13 Jun 2025 13:59:39 -0400
Subject: [PATCH] add unit test for get-content-by-type.ts

---
 .../activitypub/misc/get-content-by-type.ts   | 168 ++++++++++++++++++
 1 file changed, 168 insertions(+)
 create mode 100644 packages/backend/test/unit/core/activitypub/misc/get-content-by-type.ts

diff --git a/packages/backend/test/unit/core/activitypub/misc/get-content-by-type.ts b/packages/backend/test/unit/core/activitypub/misc/get-content-by-type.ts
new file mode 100644
index 0000000000..002c109a2e
--- /dev/null
+++ b/packages/backend/test/unit/core/activitypub/misc/get-content-by-type.ts
@@ -0,0 +1,168 @@
+/*
+ * SPDX-FileCopyrightText: hazelnoot and other Sharkey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { getContentByType } from '@/core/activitypub/misc/get-content-by-type.js';
+
+describe(getContentByType, () => {
+	describe('when permissive', () => {
+
+		it('should return source.content when it matches', () => {
+			const obj = {
+				source: {
+					content: 'source content',
+				},
+				_misskey_content: 'misskey content',
+				content: 'native content',
+				mediaType: 'text/x.misskeYMarkdown, text/markdown',
+			};
+
+			const content = getContentByType(obj, 'text/x.misskeymarkdown', true);
+
+			expect(content).toBe('source content');
+		});
+
+		it('should return _misskey_content when it matches', () => {
+			const obj = {
+				source: {
+					content: 'source content',
+					mediaType: 'text/plain',
+				},
+				_misskey_content: 'misskey content',
+				content: 'native content',
+				mediaType: 'text/x.misskeYMarkdown, text/markdown',
+			};
+
+			const content = getContentByType(obj, 'text/x.misskeymarkdown', true);
+
+			expect(content).toBe('misskey content');
+		});
+
+		it('should return content when it matches', () => {
+			const obj = {
+				source: {
+					content: 'source content',
+					mediaType: 'text/plain',
+				},
+				_misskey_content: null,
+				content: 'native content',
+				mediaType: 'text/x.misskeYMarkdown, text/markdown',
+			};
+
+			const content = getContentByType(obj, 'text/x.misskeymarkdown', true);
+
+			expect(content).toBe('native content');
+		});
+
+		it('should return null when nothing matches', () => {
+			const obj = {
+				source: {
+					content: 'source content',
+					mediaType: 'text/plain',
+				},
+				_misskey_content: null,
+				content: 'native content',
+				mediaType: 'text/plain',
+			};
+
+			const content = getContentByType(obj, 'text/x.misskeymarkdown', true);
+
+			expect(content).toBe(null);
+		});
+
+		it('should return null for invalid inputs', () => {
+			const objects = [
+				{},
+				{ source: 'nope' },
+				{ content: null },
+				{ _misskey_content: 123 },
+			];
+
+			const results = objects.map(c => getContentByType(c, 'text/misskeymarkdown', true));
+
+			const expected = objects.map(() => null);
+			expect(results).toEqual(expected);
+		});
+	});
+
+	describe('when not permissive', () => {
+		it('should return source.content when it matches', () => {
+			const obj = {
+				source: {
+					content: 'source content',
+					mediaType: 'text/x.misskeymarkdown',
+				},
+				_misskey_content: 'misskey content',
+				content: 'native content',
+				mediaType: 'text/x.misskeymarkdown',
+			};
+
+			const content = getContentByType(obj, 'text/x.misskeymarkdown');
+
+			expect(content).toBe('source content');
+		});
+
+		it('should return _misskey_content when it matches', () => {
+			const obj = {
+				source: {
+					content: 'source content',
+					mediaType: 'text/plain',
+				},
+				_misskey_content: 'misskey content',
+				content: 'native content',
+				mediaType: 'text/x.misskeymarkdown',
+			};
+
+			const content = getContentByType(obj, 'text/x.misskeymarkdown');
+
+			expect(content).toBe('misskey content');
+		});
+
+		it('should return content when it matches', () => {
+			const obj = {
+				source: {
+					content: 'source content',
+					mediaType: 'text/plain',
+				},
+				_misskey_content: null,
+				content: 'native content',
+				mediaType: 'text/x.misskeymarkdown',
+			};
+
+			const content = getContentByType(obj, 'text/x.misskeymarkdown');
+
+			expect(content).toBe('native content');
+		});
+
+		it('should return null when nothing matches', () => {
+			const obj = {
+				source: {
+					content: 'source content',
+					mediaType: 'text/plain',
+				},
+				_misskey_content: null,
+				content: 'native content',
+				mediaType: 'text/plain',
+			};
+
+			const content = getContentByType(obj, 'text/x.misskeymarkdown');
+
+			expect(content).toBe(null);
+		});
+
+		it('should return null for invalid inputs', () => {
+			const objects = [
+				{},
+				{ source: 'nope' },
+				{ content: null },
+				{ _misskey_content: 123 },
+			];
+
+			const results = objects.map(c => getContentByType(c, 'text/misskeymarkdown'));
+
+			const expected = objects.map(() => null);
+			expect(results).toEqual(expected);
+		});
+	});
+});