add inferring watch mode and not restarting containers (#19)

* add inferring watch mode and not restarting containers

* add optional config to disable watch optimization

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@trendyol/jest-testcontainers",
-  "version": "1.4.0",
+  "version": "2.0.0",
   "description": "Jest preset for starting docker containers that stay up whilist your tests run.",
   "main": "dist/index",
   "types": "dist/index",

src/setup.ts

@@ -28,7 +28,15 @@ function createGlobalVariablesFromMetaInfos(
   }, {});
 }
 
-async function setup() {
+async function setup(opts: any) {
+  if (
+    !process.env.JEST_TESTCONTAINERS_RESTART_ON_WATCH &&
+    (opts.watch || opts.watchAll) &&
+    global.__TESTCONTAINERS__
+  ) {
+    return;
+  }
+
   const jestTestcontainersConfig = configReader();
   const allStartedContainersMetaInfo = await startAllContainers(
     jestTestcontainersConfig

src/teardown.spec.ts

@@ -12,12 +12,29 @@ describe("teardown", () => {
       (global as any)[CONTAINERS_GLOBAL_VARIABLE_KEY] = mocks;
 
       // Act
-      await teardown();
+      await teardown({});
 
       // Assert
       for (const { stop: mockCallback } of mocks) {
         expect(mockCallback.mock.calls.length).toBe(1);
       }
     });
+
+    it("should not call stop if started in watch mode", async () => {
+      // Arrange
+      const mocks = [...new Array(5)].map(() => ({
+        stop: jest.fn(() => Promise.resolve())
+      }));
+
+      (global as any)[CONTAINERS_GLOBAL_VARIABLE_KEY] = mocks;
+
+      // Act
+      await teardown({ watch: true });
+
+      // Assert
+      for (const { stop: mockCallback } of mocks) {
+        expect(mockCallback.mock.calls.length).toBe(0);
+      }
+    });
   });
 });

src/teardown.ts

@@ -1,6 +1,13 @@
 import { StartedContainerAndMetaInfo } from "./containers";
 
-async function teardown() {
+async function teardown(opts: any) {
+  if (
+    !process.env.JEST_TESTCONTAINERS_RESTART_ON_WATCH &&
+    (opts.watch || opts.watchAll)
+  ) {
+    return;
+  }
+
   const allStartedContainers: StartedContainerAndMetaInfo[] = (global as any)
     .__TESTCONTAINERS__;