Add specs for "code" component

ee/spec/frontend/vulnerabilities/generic_report/types/code_spec.js

+import { GlLink } from '@gitlab/ui';
+import { shallowMount } from '@vue/test-utils';
+import Code from 'ee/vulnerabilities/components/generic_report/types/code.vue';
+import CodeBlock from '~/vue_shared/components/code_block.vue';
+
+const TEST_DATA = {
+  value: '<h1>Foo</h1>',
+};
+
+describe('ee/vulnerabilities/components/generic_report/types/code.vue', () => {
+  let wrapper;
+
+  const createWrapper = () => {
+    return shallowMount(Code, {
+      propsData: {
+        ...TEST_DATA,
+      },
+    });
+  };
+
+  const findCodeBlock = () => wrapper.findComponent(CodeBlock);
+
+  beforeEach(() => {
+    wrapper = createWrapper();
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('renders a code-block', () => {
+    expect(findCodeBlock().exists()).toBe(true);
+  });
+
+  it('passes the given value to the code-block component', () => {
+    expect(findCodeBlock().props('code')).toBe(TEST_DATA.value);
+  });
+});