improvement: encode query string value for validator badge url (#4724)

* Encode query string value for validator badge url

* add tests

test/components/online-validator-badge.js

@@ -0,0 +1,79 @@
+/* eslint-env mocha */
+import React from "react"
+import expect, { createSpy } from "expect"
+import { mount } from "enzyme"
+import { fromJS, Map } from "immutable"
+import OnlineValidatorBadge from "components/online-validator-badge"
+
+describe("<OnlineValidatorBadge/>", function () {
+  it("should render a validator link and image correctly for the default validator", function () {
+    // When
+    const props = {
+      getConfigs: () => ({}),
+      getComponent: () => null,
+      specSelectors: {
+        url: () => "swagger.json"
+      }
+    }
+    const wrapper = mount(
+     <OnlineValidatorBadge {...props} />
+    )
+
+    // Then
+    expect(wrapper.find("a").props().href).toEqual(
+      "https://online.swagger.io/validator/debug?url=swagger.json"
+    )
+    expect(wrapper.find("ValidatorImage").length).toEqual(1)
+    expect(wrapper.find("ValidatorImage").props().src).toEqual(
+      "https://online.swagger.io/validator?url=swagger.json"
+    )
+  })
+  it("should encode a definition URL correctly", function () {
+    // When
+    const props = {
+      getConfigs: () => ({}),
+      getComponent: () => null,
+      specSelectors: {
+        url: () => "http://google.com/swagger.json"
+      }
+    }
+    const wrapper = mount(
+      <OnlineValidatorBadge {...props} />
+    )
+
+    // Then
+    expect(wrapper.find("a").props().href).toEqual(
+      "https://online.swagger.io/validator/debug?url=http%3A%2F%2Fgoogle.com%2Fswagger.json"
+    )
+    expect(wrapper.find("ValidatorImage").length).toEqual(1)
+    expect(wrapper.find("ValidatorImage").props().src).toEqual(
+      "https://online.swagger.io/validator?url=http%3A%2F%2Fgoogle.com%2Fswagger.json"
+    )
+  })
+  it.skip("should resolve a definition URL against the browser's location", function () {
+    // TODO: mock `window`
+    // When
+
+    const props = {
+      getConfigs: () => ({}),
+      getComponent: () => null,
+      specSelectors: {
+        url: () => "http://google.com/swagger.json"
+      }
+    }
+    const wrapper = mount(
+      <OnlineValidatorBadge {...props} />
+    )
+
+    // Then
+    expect(wrapper.find("a").props().href).toEqual(
+      "https://online.swagger.io/validator/debug?url=http%3A%2F%2Fgoogle.com%2Fswagger.json"
+    )
+    expect(wrapper.find("ValidatorImage").length).toEqual(1)
+    expect(wrapper.find("ValidatorImage").props().src).toEqual(
+      "https://online.swagger.io/validator?url=http%3A%2F%2Fgoogle.com%2Fswagger.json"
+    )
+  })
+  // should resolve a definition URL against the browser's location
+
+})