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/components/schemes-wrapper.jsx

@@ -0,0 +1,88 @@
+import React from "react"
+import { mount } from "enzyme"
+import { fromJS } from "immutable"
+import SchemesContainer from "containers/schemes"
+import Schemes from "components/schemes"
+import { Col } from "components/layout-utils"
+
+describe("<SchemesContainer/>", function(){
+
+  const components = {
+    schemes: Schemes,
+    Col,
+    authorizeBtn: () => <span className="mocked-button" id="mocked-button" />
+  }
+  const mockedProps = {
+    specSelectors: {
+      securityDefinitions() {},
+      operationScheme() {},
+      schemes() {}
+    },
+    specActions: {
+      setScheme() {}
+    },
+    getComponent: c => components[c]
+  }
+  const twoSecurityDefinitions = {
+    "petstore_auth": {
+      "type": "oauth2",
+      "authorizationUrl": "http://petstore.swagger.io/oauth/dialog",
+      "flow": "implicit",
+      "scopes": {
+        "write:pets": "modify pets in your account",
+        "read:pets": "read your pets"
+      }
+    },
+    "api_key": {
+      "type": "apiKey",
+      "name": "api_key",
+      "in": "header"
+    }
+  }
+
+  it("renders Schemes inside SchemesContainer if schemes are provided", function(){
+
+    // Given
+    let props = {...mockedProps}
+    props.specSelectors = {...mockedProps.specSelectors}
+    props.specSelectors.operationScheme = function() {return "http"}
+    props.specSelectors.schemes = function() {return fromJS(["http", "https"])}
+
+    // When
+    let wrapper = mount(<SchemesContainer {...props}/>)
+
+    // Then
+    const renderedSchemes = wrapper.find(Schemes)
+    expect(renderedSchemes.length).toEqual(1)
+  })
+
+  it("does not render Schemes inside SchemeWrapper if empty array of schemes is provided", function(){
+
+    // Given
+    let props = {...mockedProps}
+    props.specSelectors = {...mockedProps.specSelectors}
+    props.specSelectors.schemes = function() {return fromJS([])}
+
+    // When
+    let wrapper = mount(<SchemesContainer {...props}/>)
+
+    // Then
+    const renderedSchemes = wrapper.find(Schemes)
+    expect(renderedSchemes.length).toEqual(0)
+  })
+
+  it("does not render Schemes inside SchemeWrapper if provided schemes are undefined", function(){
+
+    // Given
+    let props = {...mockedProps}
+    props.specSelectors = {...mockedProps.specSelectors}
+    props.specSelectors.schemes = function() {return undefined}
+
+    // When
+    let wrapper = mount(<SchemesContainer {...props}/>)
+
+    // Then
+    const renderedSchemes = wrapper.find(Schemes)
+    expect(renderedSchemes.length).toEqual(0)
+  })
+})