feat: migrate unit tests to Jest (#6353)

* config(jest): updated setup
* config(jest): update testMatch to include jsx files
* config(jest): add transformIgnorePatterns
* config(jest): update ignore files that do not work in jest yet
* config: add test:unit-jest to test script

* fix(jest): lint with eslint-plugin-jest

* refactor(jest): move unit test directory
* refactor(mocha): restore mocha tests that fail in jest

* docs(jest): update helpful scripts with test:unit-jest

test/unit/core/plugins/swagger-js/withCredentials.js

@@ -0,0 +1,93 @@
+import { loaded } from "corePlugins/swagger-js/configs-wrap-actions"
+
+describe("swagger-js plugin - withCredentials", () => {
+  it("should have no effect by default", () => {
+    const system = {
+      fn: {
+        fetch: jest.fn().mockImplementation(() => Promise.resolve())
+      },
+      getConfigs: () => ({})
+    }
+    const oriExecute = jest.fn()
+
+    const loadedFn = loaded(oriExecute, system)
+    loadedFn()
+
+    expect(oriExecute.mock.calls.length).toBe(1)
+    expect(system.fn.fetch.withCredentials).toBe(undefined)
+  })
+
+  it("should allow setting flag to true via config", () => {
+    const system = {
+      fn: {
+        fetch: jest.fn().mockImplementation(() => Promise.resolve())
+      },
+      getConfigs: () => ({
+        withCredentials: true
+      })
+    }
+    const oriExecute = jest.fn()
+
+    const loadedFn = loaded(oriExecute, system)
+    loadedFn()
+
+    expect(oriExecute.mock.calls.length).toBe(1)
+    expect(system.fn.fetch.withCredentials).toBe(true)
+  })
+  
+  it("should allow setting flag to false via config", () => {
+    const system = {
+      fn: {
+        fetch: jest.fn().mockImplementation(() => Promise.resolve())
+      },
+      getConfigs: () => ({
+        withCredentials: false
+      })
+    }
+    const oriExecute = jest.fn()
+
+    const loadedFn = loaded(oriExecute, system)
+    loadedFn()
+
+    expect(oriExecute.mock.calls.length).toBe(1)
+    expect(system.fn.fetch.withCredentials).toBe(false)
+  })
+  
+   it("should allow setting flag to true via config as string", () => {
+    // for query string config
+    const system = {
+      fn: {
+        fetch: jest.fn().mockImplementation(() => Promise.resolve())
+      },
+      getConfigs: () => ({
+        withCredentials: "true"
+      })
+    }
+    const oriExecute = jest.fn()
+
+    const loadedFn = loaded(oriExecute, system)
+    loadedFn()
+
+    expect(oriExecute.mock.calls.length).toBe(1)
+    expect(system.fn.fetch.withCredentials).toBe(true)
+  })
+  
+  it("should allow setting flag to false via config as string", () => {
+    // for query string config
+    const system = {
+      fn: {
+        fetch: jest.fn().mockImplementation(() => Promise.resolve())
+      },
+      getConfigs: () => ({
+        withCredentials: "false"
+      })
+    }
+    const oriExecute = jest.fn()
+
+    const loadedFn = loaded(oriExecute, system)
+    loadedFn()
+
+    expect(oriExecute.mock.calls.length).toBe(1)
+    expect(system.fn.fetch.withCredentials).toBe(false)
+  })
+})