unit(database): ensure post tag manager works

database/managers/post_tag.spec.ts

@@ -0,0 +1,25 @@
+import Factory from "~/factories/post_tag"
+import Manager from "./post_tag"
+
+describe("Database Manager: Post tag read operations", () => {
+	it("can check if model belongs to post", async() => {
+		const manager = new Manager()
+		const model = await new Factory().insertOne()
+
+		const foundModel = await manager.findPostTag(model.postID, model.tagID)
+
+		expect(foundModel).not.toBeNull()
+		expect(foundModel).toHaveProperty("id", model.id)
+	})
+})
+
+describe("Database Manager: Miscellaneous post tag operations", () => {
+	it("can get sortable columns", () => {
+		// Include in test to alert in case there are new columns to decide whether to expose or not
+		const manager = new Manager()
+
+		const { sortableColumns } = manager
+
+		expect(sortableColumns).toStrictEqual([])
+	})
+})