Finish up refactor of policy editor

- ensure everything works properly
- clean up code
- update/add tests

ee/app/assets/javascripts/threat_monitoring/components/policy_drawer/cilium_network_policy.vue

 <script>
-import {
-  fromYaml,
-  humanizeNetworkPolicy,
-  removeUnnecessaryDashes,
-} from '../policy_editor/network_policy/lib';
+import { removeUnnecessaryDashes } from '../../utils';
+import { fromYaml, humanizeNetworkPolicy } from '../policy_editor/network_policy/lib';
 import PolicyPreview from '../policy_editor/policy_preview.vue';
 import BasePolicy from './base_policy.vue';
 import PolicyInfoRow from './policy_info_row.vue';

ee/app/assets/javascripts/threat_monitoring/components/policy_drawer/scan_execution_policy.vue

 <script>
 import { GlLink } from '@gitlab/ui';
-import { safeLoad } from 'js-yaml';
+import { fromYaml } from '../policy_editor/scan_execution_policy/lib';
 import BasePolicy from './base_policy.vue';
 import PolicyInfoRow from './policy_info_row.vue';
 
@@ -18,7 +18,7 @@ export default {
   },
   computed: {
     policy() {
-      return safeLoad(this.value, { json: true });
+      return fromYaml(this.value);
     },
   },
 };

ee/app/assets/javascripts/threat_monitoring/components/policy_editor/constants.js

 import { s__, __ } from '~/locale';
 
-export const EditorModeRule = 'rule';
-export const EditorModeYAML = 'yaml';
+export const EDITOR_MODE_RULE = 'rule';
+export const EDITOR_MODE_YAML = 'yaml';
 
 export const PARSING_ERROR_MESSAGE = s__(
   'NetworkPolicies|Rule mode is unavailable for this policy. In some cases, we cannot parse the YAML file back into the rules editor.',
 );
 
 export const EDITOR_MODES = [
-  { value: EditorModeRule, text: s__('NetworkPolicies|Rule mode') },
-  { value: EditorModeYAML, text: s__('NetworkPolicies|.yaml mode') },
+  { value: EDITOR_MODE_RULE, text: s__('NetworkPolicies|Rule mode') },
+  { value: EDITOR_MODE_YAML, text: s__('NetworkPolicies|.yaml mode') },
 ];
 
 export const POLICY_TYPES = {

ee/app/assets/javascripts/threat_monitoring/components/policy_editor/network_policy/network_policy_editor.vue

 <script>
 import { GlFormGroup, GlFormInput, GlFormTextarea, GlToggle, GlButton, GlAlert } from '@gitlab/ui';
 import { mapState, mapActions } from 'vuex';
+import { removeUnnecessaryDashes } from 'ee/threat_monitoring/utils';
 import { redirectTo } from '~/lib/utils/url_utility';
 import { s__ } from '~/locale';
-import { EDITOR_MODES, EditorModeYAML, PARSING_ERROR_MESSAGE } from '../constants';
+import { EDITOR_MODES, EDITOR_MODE_YAML, PARSING_ERROR_MESSAGE } from '../constants';
 import DimDisableContainer from '../dim_disable_container.vue';
 import PolicyActionPicker from '../policy_action_picker.vue';
 import PolicyAlertPicker from '../policy_alert_picker.vue';
 import PolicyEditorLayout from '../policy_editor_layout.vue';
 import PolicyPreview from '../policy_preview.vue';
-import { removeUnnecessaryDashes } from '../utils';
 import {
   DEFAULT_NETWORK_POLICY,
   RuleTypeEndpoint,
@@ -128,14 +128,14 @@ export default {
       }
     },
     changeEditorMode(mode) {
-      if (mode === EditorModeYAML && !this.hasParsingError) {
+      if (mode === EDITOR_MODE_YAML && !this.hasParsingError) {
         this.yamlEditorValue = toYaml(this.policy);
       }
     },
     savePolicy(mode) {
       const saveFn = this.isEditing ? this.updatePolicy : this.createPolicy;
       const policy = {
-        manifest: mode === EditorModeYAML ? this.yamlEditorValue : toYaml(this.policy),
+        manifest: mode === EDITOR_MODE_YAML ? this.yamlEditorValue : toYaml(this.policy),
       };
       if (this.isEditing) {
         policy.name = this.existingPolicy.name;
@@ -159,6 +159,7 @@ export default {
 <template>
   <policy-editor-layout
     :is-editing="isEditing"
+    :is-removing-policy="isRemovingPolicy"
     :is-updating-policy="isUpdatingPolicy"
     :policy-name="policy.name"
     :yaml-editor-value="yamlEditorValue"

ee/app/assets/javascripts/threat_monitoring/components/policy_editor/policy_editor_layout.vue

 <script>
 import { GlButton, GlFormGroup, GlModal, GlModalDirective, GlSegmentedControl } from '@gitlab/ui';
 import { s__, sprintf } from '~/locale';
-import { DELETE_MODAL_CONFIG, EDITOR_MODES, EditorModeRule, EditorModeYAML } from './constants';
+import { DELETE_MODAL_CONFIG, EDITOR_MODES, EDITOR_MODE_RULE, EDITOR_MODE_YAML } from './constants';
 
 export default {
   i18n: {
@@ -18,15 +18,10 @@ export default {
   directives: { GlModal: GlModalDirective },
   inject: ['threatMonitoringPath'],
   props: {
-    customSaveButtonText: {
-      type: String,
-      required: false,
-      default: '',
-    },
     defaultEditorMode: {
       type: String,
       required: false,
-      default: EditorModeRule,
+      default: EDITOR_MODE_RULE,
     },
     editorModes: {
       type: Array,
@@ -38,6 +33,11 @@ export default {
       required: false,
       default: false,
     },
+    isRemovingPolicy: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
     isUpdatingPolicy: {
       type: Boolean,
       required: false,
@@ -64,18 +64,15 @@ export default {
       return sprintf(s__('NetworkPolicies|Delete policy: %{policy}'), { policy: this.policyName });
     },
     saveButtonText() {
-      if (this.customSaveButtonText) {
-        return this.customSaveButtonText;
-      }
       return this.isEditing
         ? s__('NetworkPolicies|Save changes')
         : s__('NetworkPolicies|Create policy');
     },
     shouldShowRuleEditor() {
-      return this.selectedEditorMode === EditorModeRule;
+      return this.selectedEditorMode === EDITOR_MODE_RULE;
     },
     shouldShowYamlEditor() {
-      return this.selectedEditorMode === EditorModeYAML;
+      return this.selectedEditorMode === EDITOR_MODE_YAML;
     },
   },
   methods: {
@@ -89,8 +86,8 @@ export default {
       this.selectedEditorMode = mode;
       this.$emit('update-editor-mode', mode);
     },
-    updateYaml() {
-      this.$emit('load-yaml');
+    updateYaml(manifest) {
+      this.$emit('update-yaml', manifest);
     },
   },
 };
@@ -103,7 +100,6 @@ export default {
         class="gl-px-5 gl-py-3 gl-mb-0 gl-bg-gray-10 gl-border-b-solid gl-border-b-gray-100 gl-border-b-1"
       >
         <gl-segmented-control
-          data-testid="editor-mode"
           :options="editorModes"
           :checked="selectedEditorMode"
           @input="updateEditorMode"
@@ -111,7 +107,9 @@ export default {
       </gl-form-group>
       <div class="gl-display-flex gl-sm-flex-direction-column">
         <section class="gl-w-full gl-p-5 gl-flex-fill-4 policy-table-left">
-          <slot v-if="shouldShowRuleEditor" name="rule-editor" data-testid="rule-editor"></slot>
+          <div v-if="shouldShowRuleEditor" data-testid="rule-editor">
+            <slot name="rule-editor"></slot>
+          </div>
           <policy-yaml-editor
             v-if="shouldShowYamlEditor"
             data-testid="policy-yaml-editor"
@@ -123,6 +121,7 @@ export default {
         <section
           v-if="shouldShowRuleEditor"
           class="gl-w-30p gl-p-5 gl-border-l-gray-100 gl-border-l-1 gl-border-l-solid gl-flex-fill-2"
+          data-testid="rule-editor-preview"
         >
           <slot name="rule-editor-preview"></slot>
         </section>
@@ -134,8 +133,11 @@ export default {
       data-testid="save-policy"
       :loading="isUpdatingPolicy"
       @click="savePolicy"
-      >{{ saveButtonText }}</gl-button
     >
+      <slot name="save-button-text">
+        {{ saveButtonText }}
+      </slot>
+    </gl-button>
     <gl-button
       v-if="isEditing"
       v-gl-modal="'delete-modal'"

ee/app/assets/javascripts/threat_monitoring/components/policy_editor/scan_execution_policy/scan_execution_policy_editor.vue

 <script>
+import { removeUnnecessaryDashes } from 'ee/threat_monitoring/utils';
 import { __ } from '~/locale';
-import { EDITOR_MODES, EditorModeYAML } from '../constants';
+import { EDITOR_MODES, EDITOR_MODE_YAML } from '../constants';
 import PolicyEditorLayout from '../policy_editor_layout.vue';
 import { DEFAULT_SCAN_EXECUTION_POLICY, fromYaml } from './lib';
 
 export default {
-  DEFAULT_EDITOR_MODE: EditorModeYAML,
+  DEFAULT_EDITOR_MODE: EDITOR_MODE_YAML,
   EDITOR_MODES: [EDITOR_MODES[1]],
   i18n: {
     createMergeRequest: __('Create merge request'),
@@ -27,28 +28,30 @@ export default {
       : fromYaml(DEFAULT_SCAN_EXECUTION_POLICY);
 
     const yamlEditorValue = this.existingPolicy
-      ? this.existingPolicy.manifest
+      ? removeUnnecessaryDashes(this.existingPolicy.manifest)
       : DEFAULT_SCAN_EXECUTION_POLICY;
 
     return {
-      editorMode: EditorModeYAML,
-      yamlEditorValue,
-      yamlEditorError: policy.error ? true : null,
+      isRemovingPolicy: false,
+      isUpdatingPolicy: false,
       policy,
+      yamlEditorValue,
     };
   },
   computed: {
-    isCreatingMergeRequest() {
-      // TODO track the graphql mutation status after #333163 is closed
-      return false;
-    },
     isEditing() {
       return Boolean(this.existingPolicy);
     },
   },
   methods: {
-    createMergeRequest() {
-      // TODO call graphql mutation and redirect to merge request after #333163 is closed
+    removePolicy() {
+      // TODO call graphql mutation and redirect to merge request after #329422 is closed
+    },
+    savePolicy() {
+      // TODO call graphql mutation and redirect to merge request after #329422 is closed
+    },
+    updateYaml(manifest) {
+      this.yamlEditorValue = manifest;
     },
   },
 };
@@ -56,13 +59,19 @@ export default {
 
 <template>
   <policy-editor-layout
-    :custom-save-button-text="$options.i18n.createMergeRequest"
     :default-editor-mode="$options.DEFAULT_EDITOR_MODE"
     :editor-modes="$options.EDITOR_MODES"
     :is-editing="isEditing"
-    :is-updating-policy="isCreatingMergeRequest"
+    :is-removing-policy="isRemovingPolicy"
+    :is-updating-policy="isUpdatingPolicy"
     :policy-name="policy.name"
     :yaml-editor-value="yamlEditorValue"
-    @save-policy="createMergeRequest"
-  />
+    @remove-policy="removePolicy"
+    @save-policy="savePolicy"
+    @update-yaml="updateYaml"
+  >
+    <template #save-button-text>
+      {{ $options.i18n.createMergeRequest }}
+    </template>
+  </policy-editor-layout>
 </template>

ee/app/assets/javascripts/threat_monitoring/components/policy_editor/utils.js

-/**
- * Removes inital line dashes from a policy YAML that is received from the API, which
- * is not required for the user.
- * @param {String} manifest the policy from the API request
- * @returns {String} the policy without the initial dashes or the initial string
- */
-export const removeUnnecessaryDashes = (manifest) => {
-  return manifest.replace('---\n', '');
-};

ee/app/assets/javascripts/threat_monitoring/utils.js

@@ -9,3 +9,13 @@ export const getContentWrapperHeight = (contentWrapperClass) => {
   const wrapperEl = document.querySelector(contentWrapperClass);
   return wrapperEl ? `${wrapperEl.offsetTop}px` : '';
 };
+
+/**
+ * Removes inital line dashes from a policy YAML that is received from the API, which
+ * is not required for the user.
+ * @param {String} manifest the policy from the API request
+ * @returns {String} the policy without the initial dashes or the initial string
+ */
+export const removeUnnecessaryDashes = (manifest) => {
+  return manifest.replace('---\n', '');
+};

ee/config/feature_flags/development/scan_execution_policy_ui.yml

@@ -4,5 +4,5 @@ introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/63585
 rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/273791
 milestone: '14.0'
 type: development
-group: group::container_security
+group: group::container security
 default_enabled: false

ee/spec/frontend/threat_monitoring/components/policy_editor/network_policy/lib/from_yaml_spec.js

@@ -11,7 +11,6 @@ import {
   RuleTypeFQDN,
   EntityTypes,
   fromYaml,
-  removeUnnecessaryDashes,
   buildRule,
   toYaml,
 } from 'ee/threat_monitoring/components/policy_editor/network_policy/lib';
@@ -332,15 +331,3 @@ spec:
     );
   });
 });
-
-describe('removeUnnecessaryDashes', () => {
-  it.each`
-    input          | output
-    ${'---\none'}  | ${'one'}
-    ${'two'}       | ${'two'}
-    ${'--\nthree'} | ${'--\nthree'}
-    ${'four---\n'} | ${'four'}
-  `('returns $output when used on $input', ({ input, output }) => {
-    expect(removeUnnecessaryDashes(input)).toBe(output);
-  });
-});

ee/spec/frontend/threat_monitoring/components/policy_editor/policy_editor_layout_spec.js

+import { GlModal, GlSegmentedControl } from '@gitlab/ui';
+import { EDITOR_MODE_YAML } from 'ee/threat_monitoring/components/policy_editor/constants';
+import PolicyEditorLayout from 'ee/threat_monitoring/components/policy_editor/policy_editor_layout.vue';
+import { shallowMountExtended } from 'helpers/vue_test_utils_helper';
+
+describe('PolicyEditorLayout component', () => {
+  let wrapper;
+  const threatMonitoringPath = '/threat-monitoring';
+
+  const factory = ({ propsData = {} } = {}) => {
+    wrapper = shallowMountExtended(PolicyEditorLayout, {
+      propsData: {
+        ...propsData,
+      },
+      provide: {
+        threatMonitoringPath,
+      },
+      stubs: { PolicyYamlEditor: true },
+    });
+  };
+
+  const findDeletePolicyButton = () => wrapper.findByTestId('delete-policy');
+  const findDeletePolicyModal = () => wrapper.findComponent(GlModal);
+  const findEditorModeToggle = () => wrapper.findComponent(GlSegmentedControl);
+  const findYamlModeSection = () => wrapper.findByTestId('policy-yaml-editor');
+  const findRuleModeSection = () => wrapper.findByTestId('rule-editor');
+  const findRuleModePreviewSection = () => wrapper.findByTestId('rule-editor-preview');
+  const findSavePolicyButton = () => wrapper.findByTestId('save-policy');
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('default behavior', () => {
+    beforeEach(() => {
+      factory();
+    });
+
+    it.each`
+      component               | status                | findComponent             | state
+      ${'editor mode toggle'} | ${'does display'}     | ${findEditorModeToggle}   | ${true}
+      ${'delete button'}      | ${'does not display'} | ${findDeletePolicyButton} | ${false}
+    `('$status the $component', async ({ findComponent, state }) => {
+      expect(findComponent().exists()).toBe(state);
+    });
+
+    it('does display the correct save button text when creating a new policy', () => {
+      const saveButton = findSavePolicyButton();
+      expect(saveButton.exists()).toBe(true);
+      expect(saveButton.text()).toBe('Create policy');
+    });
+
+    it('emits properly with the current mode when the save button is clicked', () => {
+      findSavePolicyButton().vm.$emit('click');
+      expect(wrapper.emitted('save-policy')).toStrictEqual([['rule']]);
+    });
+
+    it('mode changes appropriately when new mode is selected', async () => {
+      expect(findRuleModeSection().exists()).toBe(true);
+      expect(findYamlModeSection().exists()).toBe(false);
+      findEditorModeToggle().vm.$emit('input', EDITOR_MODE_YAML);
+      await wrapper.vm.$nextTick();
+      expect(findRuleModeSection().exists()).toBe(false);
+      expect(findYamlModeSection().exists()).toBe(true);
+      expect(wrapper.emitted('update-editor-mode')).toStrictEqual([[EDITOR_MODE_YAML]]);
+    });
+
+    it('does display custom save button text', () => {
+      // custom save button text works
+      const saveButton = findSavePolicyButton();
+      expect(saveButton.exists()).toBe(true);
+      expect(saveButton.text()).toBe('Create policy');
+    });
+  });
+
+  describe('editing a policy', () => {
+    beforeEach(() => {
+      factory({ propsData: { isEditing: true } });
+    });
+
+    it('does not emit when the delete button is clicked', () => {
+      findDeletePolicyButton().vm.$emit('click');
+      expect(wrapper.emitted('remove-policy')).toStrictEqual(undefined);
+    });
+
+    it('emits properly when the delete modal is closed', () => {
+      findDeletePolicyModal().vm.$emit('secondary');
+      expect(wrapper.emitted('remove-policy')).toStrictEqual([[]]);
+    });
+  });
+
+  describe('rule mode', () => {
+    beforeEach(() => {
+      factory();
+    });
+
+    it.each`
+      component                      | status                | findComponent                 | state
+      ${'rule mode section'}         | ${'does display'}     | ${findRuleModeSection}        | ${true}
+      ${'rule mode preview section'} | ${'does display'}     | ${findRuleModePreviewSection} | ${true}
+      ${'yaml mode section'}         | ${'does not display'} | ${findYamlModeSection}        | ${false}
+    `('$status the $component', async ({ findComponent, state }) => {
+      expect(findComponent().exists()).toBe(state);
+    });
+  });
+
+  describe('yaml mode', () => {
+    beforeEach(() => {
+      factory({ propsData: { defaultEditorMode: EDITOR_MODE_YAML } });
+    });
+
+    it.each`
+      component                      | status                | findComponent                 | state
+      ${'rule mode section'}         | ${'does not display'} | ${findRuleModeSection}        | ${false}
+      ${'rule mode preview section'} | ${'does not display'} | ${findRuleModePreviewSection} | ${false}
+      ${'yaml mode section'}         | ${'does display'}     | ${findYamlModeSection}        | ${true}
+    `('$status the $component', async ({ findComponent, state }) => {
+      expect(findComponent().exists()).toBe(state);
+    });
+
+    it('emits propertly when yaml is updated', () => {
+      const newManifest = 'new yaml!';
+      findYamlModeSection().vm.$emit('input', newManifest);
+      expect(wrapper.emitted('update-yaml')).toStrictEqual([[newManifest]]);
+    });
+  });
+});

ee/spec/frontend/threat_monitoring/components/policy_editor/policy_editor_spec.js

@@ -14,7 +14,7 @@ describe('PolicyEditor component', () => {
   const findFormSelect = () => wrapper.findComponent(GlFormSelect);
   const findNeworkPolicyEditor = () => wrapper.findComponent(NetworkPolicyEditor);
 
-  const factory = ({ propsData } = {}) => {
+  const factory = ({ propsData = {}, provide = {} } = {}) => {
     store = createStore();
 
     jest.spyOn(store, 'dispatch').mockImplementation(() => Promise.resolve());
@@ -25,18 +25,19 @@ describe('PolicyEditor component', () => {
         projectId: '21',
         ...propsData,
       },
+      provide,
       store,
       stubs: { GlFormSelect },
     });
   };
 
-  beforeEach(factory);
-
   afterEach(() => {
     wrapper.destroy();
   });
 
   describe('default', () => {
+    beforeEach(factory);
+
     it('renders the environment picker', () => {
       expect(findEnvironmentPicker().exists()).toBe(true);
     });
@@ -45,10 +46,23 @@ describe('PolicyEditor component', () => {
       const formSelect = findFormSelect();
       expect(formSelect.exists()).toBe(true);
       expect(formSelect.attributes('value')).toBe(POLICY_TYPES.networkPolicy.value);
+      expect(formSelect.attributes('disabled')).toBe('true');
     });
 
     it('renders the "NetworkPolicyEditor" component', () => {
       expect(findNeworkPolicyEditor().exists()).toBe(true);
     });
   });
+
+  describe('with "scanExecutionPolicyUi" feature flag enabled', () => {
+    beforeEach(() => {
+      factory({ provide: { glFeatures: { scanExecutionPolicyUi: true } } });
+    });
+
+    it('renders the form select', () => {
+      const formSelect = findFormSelect();
+      expect(formSelect.exists()).toBe(true);
+      expect(formSelect.attributes('disabled')).toBe(undefined);
+    });
+  });
 });

ee/spec/frontend/threat_monitoring/components/policy_editor/scan_execution_policy/lib/from_yaml_spec.js

+import {
+  DEFAULT_SCAN_EXECUTION_POLICY,
+  fromYaml,
+} from 'ee/threat_monitoring/components/policy_editor/scan_execution_policy/lib';
+
+describe('fromYaml', () => {
+  it('returns policy object', () => {
+    expect(fromYaml(DEFAULT_SCAN_EXECUTION_POLICY)).toMatchObject({
+      name: '',
+      description: '',
+      enabled: false,
+      actions: [{ scan: 'dast', site_profile: '', scanner_profile: '' }],
+      rules: [{ branches: ['main'], type: 'pipeline' }],
+    });
+  });
+});

ee/spec/frontend/threat_monitoring/components/policy_editor/scan_execution_policy/scan_execution_policy_spec.js

+import { shallowMount } from '@vue/test-utils';
+import PolicyEditorLayout from 'ee/threat_monitoring/components/policy_editor/policy_editor_layout.vue';
+import { DEFAULT_SCAN_EXECUTION_POLICY } from 'ee/threat_monitoring/components/policy_editor/scan_execution_policy/lib';
+import ScanExecutionPolicyEditor from 'ee/threat_monitoring/components/policy_editor/scan_execution_policy/scan_execution_policy_editor.vue';
+import waitForPromises from 'helpers/wait_for_promises';
+
+describe('ScanExecutionPolicyEditor', () => {
+  let wrapper;
+
+  const factory = ({ propsData = {} } = {}) => {
+    wrapper = shallowMount(ScanExecutionPolicyEditor, {
+      propsData,
+      provide: {
+        threatMonitoringPath: '',
+        projectId: 1,
+      },
+    });
+  };
+
+  const findPolicyEditorLayout = () => wrapper.findComponent(PolicyEditorLayout);
+
+  beforeEach(() => {
+    factory();
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('calls the save policy funtion when "save-policy" is emitted', async () => {
+    const savePolicySpy = jest.spyOn(wrapper.vm, 'savePolicy');
+    expect(wrapper.vm.savePolicy).toHaveBeenCalledTimes(0);
+    findPolicyEditorLayout().vm.$emit('save-policy');
+    await waitForPromises();
+    expect(wrapper.vm.savePolicy).toHaveBeenCalledTimes(1);
+    savePolicySpy.mockRestore();
+  });
+
+  it('calls the remove policy funtion when "remove-policy" is emitted', async () => {
+    const removePolicySpy = jest.spyOn(wrapper.vm, 'removePolicy');
+    expect(wrapper.vm.removePolicy).toHaveBeenCalledTimes(0);
+    findPolicyEditorLayout().vm.$emit('remove-policy');
+    await waitForPromises();
+    expect(wrapper.vm.removePolicy).toHaveBeenCalledTimes(1);
+    removePolicySpy.mockRestore();
+  });
+
+  it('updates the policy yaml when "update-yaml" is emitted', async () => {
+    const updateYamlSpy = jest.spyOn(wrapper.vm, 'updateYaml');
+    const newManifest = 'new yaml!';
+    expect(wrapper.vm.updateYaml).toHaveBeenCalledTimes(0);
+    expect(findPolicyEditorLayout().attributes('yamleditorvalue')).toBe(
+      DEFAULT_SCAN_EXECUTION_POLICY,
+    );
+    findPolicyEditorLayout().vm.$emit('update-yaml', newManifest);
+    await waitForPromises();
+    expect(wrapper.vm.updateYaml).toHaveBeenCalledTimes(1);
+    expect(wrapper.vm.updateYaml).toHaveBeenCalledWith(newManifest);
+    expect(findPolicyEditorLayout().attributes('yaml-editor-value')).toBe(newManifest);
+    updateYamlSpy.mockRestore();
+  });
+});

ee/spec/frontend/threat_monitoring/mocks/mock_data.js

@@ -181,3 +181,40 @@ export const mockAlertDetails = {
   title: 'dropingress',
   monitorTool: 'Cilium',
 };
+
+export const mockL7Manifest = `apiVersion: cilium.io/v2
+kind: CiliumNetworkPolicy
+metadata:
+  name: limit-inbound-ip
+spec:
+  endpointSelector: {}
+  ingress:
+  - toPorts:
+    - ports:
+      - port: '80'
+        protocol: TCP
+      - port: '443'
+        protocol: TCP
+      rules:
+        http:
+        - headers:
+          - 'X-Forwarded-For: 192.168.1.1'
+    fromEntities:
+    - cluster`;
+
+export const mockL3Manifest = `apiVersion: cilium.io/v2
+kind: CiliumNetworkPolicy
+description: test description
+metadata:
+  name: test-policy
+  labels:
+    app.gitlab.com/proj: '21'
+spec:
+  endpointSelector:
+    matchLabels:
+      network-policy.gitlab.com/disabled_by: gitlab
+      foo: bar
+  ingress:
+  - fromEndpoints:
+    - matchLabels:
+        foo: bar`;

ee/spec/frontend/threat_monitoring/utils_spec.js

-import { getContentWrapperHeight } from 'ee/threat_monitoring/utils';
+import { getContentWrapperHeight, removeUnnecessaryDashes } from 'ee/threat_monitoring/utils';
 import { setHTMLFixture } from 'helpers/fixtures';
 
 describe('Threat Monitoring Utils', () => {
@@ -23,4 +23,16 @@ describe('Threat Monitoring Utils', () => {
       expect(getContentWrapperHeight('.does-not-exist')).toBe('');
     });
   });
+
+  describe('removeUnnecessaryDashes', () => {
+    it.each`
+      input          | output
+      ${'---\none'}  | ${'one'}
+      ${'two'}       | ${'two'}
+      ${'--\nthree'} | ${'--\nthree'}
+      ${'four---\n'} | ${'four'}
+    `('returns $output when used on $input', ({ input, output }) => {
+      expect(removeUnnecessaryDashes(input)).toBe(output);
+    });
+  });
 });