From f7532bcf1cbadd518a5f38ad8f0b9228e86a20ac Mon Sep 17 00:00:00 2001
From: Patrik Oldsberg <poldsberg@gmail.com>
Date: Fri, 7 Aug 2020 11:05:04 +0200
Subject: [PATCH] config-loader: added tests for resolver

---
 .../config-loader/src/lib/resolver.test.ts    | 116 ++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 packages/config-loader/src/lib/resolver.test.ts

diff --git a/packages/config-loader/src/lib/resolver.test.ts b/packages/config-loader/src/lib/resolver.test.ts
new file mode 100644
index 0000000000..78e869e612
--- /dev/null
+++ b/packages/config-loader/src/lib/resolver.test.ts
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const pathExists = jest.fn();
+
+jest.mock('fs-extra', () => ({ pathExists }));
+
+import { resolveStaticConfig } from './resolver';
+
+describe('resolveStaticConfig', () => {
+  afterEach(() => {
+    jest.resetAllMocks();
+  });
+
+  it('should resolve no files for empty roots', async () => {
+    const resolved = await resolveStaticConfig({
+      env: 'development',
+      rootPaths: [],
+    });
+
+    expect(resolved).toEqual([]);
+    expect(pathExists).not.toHaveBeenCalled();
+  });
+
+  it('should resolve a single app-config', async () => {
+    pathExists.mockImplementation(async (path: string) =>
+      ['/repo/app-config.yaml'].includes(path),
+    );
+    const resolved = await resolveStaticConfig({
+      env: 'development',
+      rootPaths: ['/repo'],
+    });
+
+    expect(resolved).toEqual(['/repo/app-config.yaml']);
+    expect(pathExists).toHaveBeenCalledTimes(4);
+  });
+
+  it('should resolve a app-configs in different directories', async () => {
+    pathExists.mockImplementation(async (path: string) =>
+      ['/repo/app-config.yaml', '/repo/packages/a/app-config.yaml'].includes(
+        path,
+      ),
+    );
+    const resolved = await resolveStaticConfig({
+      env: 'development',
+      rootPaths: [
+        '/repo/packages/a',
+        '/repo/packages/b',
+        '/other-repo',
+        '/repo',
+      ],
+    });
+
+    expect(resolved).toEqual([
+      '/repo/packages/a/app-config.yaml',
+      '/repo/app-config.yaml',
+    ]);
+    expect(pathExists).toHaveBeenCalledTimes(16);
+  });
+
+  it('should resolve env and local configs', async () => {
+    pathExists.mockImplementation(async (path: string) =>
+      [
+        '/repo/app-config.yaml',
+        '/repo/app-config.local.yaml',
+        '/repo/app-config.production.yaml',
+        '/repo/app-config.production.local.yaml',
+        '/repo/app-config.development.local.yaml',
+        '/repo/packages/a/app-config.development.yaml',
+        '/repo/packages/a/app-config.local.yaml',
+      ].includes(path),
+    );
+    const resolved = await resolveStaticConfig({
+      env: 'development',
+      rootPaths: ['/repo/packages/a', '/repo'],
+    });
+
+    expect(resolved).toEqual([
+      '/repo/packages/a/app-config.development.yaml',
+      '/repo/packages/a/app-config.local.yaml',
+      '/repo/app-config.development.local.yaml',
+      '/repo/app-config.local.yaml',
+      '/repo/app-config.yaml',
+    ]);
+    expect(pathExists).toHaveBeenCalledTimes(8);
+  });
+
+  it('resolves suffixed configs in the correct order', async () => {
+    pathExists.mockImplementation(async () => true);
+    const resolved = await resolveStaticConfig({
+      env: 'production',
+      rootPaths: ['/repo'],
+    });
+
+    expect(resolved).toEqual([
+      '/repo/app-config.production.local.yaml',
+      '/repo/app-config.production.yaml',
+      '/repo/app-config.local.yaml',
+      '/repo/app-config.yaml',
+    ]);
+    expect(pathExists).toHaveBeenCalledTimes(4);
+  });
+});