Add tests for getQlPackPath

extensions/ql-vscode/test/unit-tests/pure/ql.test.ts

@@ -0,0 +1,48 @@
+import { join } from "path";
+import { dirSync } from "tmp-promise";
+import { DirResult } from "tmp";
+import { writeFile } from "fs-extra";
+import { getQlPackPath } from "../../../src/pure/ql";
+
+describe("getQlPackPath", () => {
+  let tmpDir: DirResult;
+
+  beforeEach(() => {
+    tmpDir = dirSync({
+      prefix: "queries_",
+      keep: false,
+      unsafeCleanup: true,
+    });
+  });
+
+  afterEach(() => {
+    tmpDir.removeCallback();
+  });
+
+  it("should find a qlpack.yml when it exists", async () => {
+    await writeFile(join(tmpDir.name, "qlpack.yml"), "name: test");
+
+    const result = await getQlPackPath(tmpDir.name);
+    expect(result).toEqual(join(tmpDir.name, "qlpack.yml"));
+  });
+
+  it("should find a codeql-pack.yml when it exists", async () => {
+    await writeFile(join(tmpDir.name, "codeql-pack.yml"), "name: test");
+
+    const result = await getQlPackPath(tmpDir.name);
+    expect(result).toEqual(join(tmpDir.name, "codeql-pack.yml"));
+  });
+
+  it("should find a qlpack.yml when both exist", async () => {
+    await writeFile(join(tmpDir.name, "qlpack.yml"), "name: test");
+    await writeFile(join(tmpDir.name, "codeql-pack.yml"), "name: test");
+
+    const result = await getQlPackPath(tmpDir.name);
+    expect(result).toEqual(join(tmpDir.name, "qlpack.yml"));
+  });
+
+  it("should find nothing when it doesn't exist", async () => {
+    const result = await getQlPackPath(tmpDir.name);
+    expect(result).toEqual(undefined);
+  });
+});