mcpToolUI basic implementation for OpenShift Lightpseed + obs-mcp + Perses

AGENTS.md

@@ -283,6 +283,54 @@ npm run cypress:open
 
 For detailed testing instructions, see `web/cypress/CYPRESS_TESTING_GUIDE.md`
 
+### Cypress Component Testing
+
+#### Overview
+
+Cypress component tests mount individual React components in isolation, without requiring a running OpenShift cluster. They are useful for testing component rendering, user interactions, and visual behavior with fast feedback.
+
+- **Test location**: `web/cypress/component/`
+- **Support file**: `web/cypress/support/component.ts`
+- **Config**: `component` section in `web/cypress.config.ts`
+
+#### When to Create Component Tests
+
+- Testing a component's rendering logic (conditional display, empty states)
+- Verifying props are handled correctly
+- Validating user interactions within a single component
+- When E2E tests would be overkill for the behavior under test
+
+#### Quick Test Commands
+
+```bash
+cd web
+
+# Interactive mode
+npm run cypress:open:component
+
+# Headless mode - all component tests
+npm run cypress:run:component
+
+# Run a single component test file
+npx cypress run --component --spec cypress/component/labels.cy.tsx
+```
+
+#### Writing a Component Test
+
+Component test files use the `.cy.tsx` extension and go in `web/cypress/component/`:
+
+```typescript
+import React from 'react';
+import { MyComponent } from '../../src/components/MyComponent';
+
+describe('MyComponent', () => {
+  it('renders correctly', () => {
+    cy.mount(<MyComponent prop="value" />);
+    cy.contains('expected text').should('be.visible');
+  });
+});
+```
+
 ### Release Pipeline:
 
 - **Konflux**: Handles CI/CD and release automation

CONTRIBUTING.md

@@ -411,6 +411,23 @@ cd web/cypress
 npm run cypress:run --spec "cypress/e2e/**/regression/**"
 ```
 
+### Component Tests (Cypress)
+
+For testing individual React components in isolation (no cluster required):
+
+- Test files: `web/cypress/component/` (`.cy.tsx` extension)
+- Support file: `web/cypress/support/component.ts`
+
+```bash
+cd web
+
+# Interactive mode
+npm run cypress:open:component
+
+# Headless mode
+npm run cypress:run:component
+```
+
 ---
 
 ## Internationalization (i18n)

config/perses-dashboards.patch.json

@@ -119,5 +119,18 @@
         "component": { "$codeRef": "DashboardPage" }
       }
     }
+  },
+  {
+    "op": "add",
+    "path": "/extensions/1",
+    "value": {
+      "type": "ols.tool-ui",
+      "properties": {
+        "id": "mcp-obs/show-timeseries",
+        "component": {
+          "$codeRef": "ols-tool-ui.ShowTimeseries"
+        }
+      }
+    }
   }
 ]

web/cypress.config.ts

@@ -3,6 +3,7 @@ import * as fs from 'fs-extra';
 import * as console from 'console';
 import * as path from 'path';
 import registerCypressGrep from '@cypress/grep/src/plugin';
+import { DefinePlugin, NormalModuleReplacementPlugin } from 'webpack';
 
 export default defineConfig({
   screenshotsFolder: './cypress/screenshots',
@@ -159,4 +160,61 @@ export default defineConfig({
     experimentalMemoryManagement: true,
     experimentalStudio: true,
   },
+  component: {
+    devServer: {
+      framework: 'react',
+      bundler: 'webpack',
+      webpackConfig: {
+        resolve: {
+          extensions: ['.ts', '.tsx', '.js', '.jsx'],
+          alias: {
+            '@perses-dev/plugin-system': path.resolve(__dirname, 'cypress/component/mocks/perses-plugin-system.tsx'),
+            '@perses-dev/dashboards': path.resolve(__dirname, 'cypress/component/mocks/perses-dashboards.tsx'),
+            '@perses-dev/prometheus-plugin': path.resolve(__dirname, 'cypress/component/mocks/perses-prometheus-plugin.ts'),
+          },
+        },
+        module: {
+          rules: [
+            {
+              test: /\.(jsx?|tsx?)$/,
+              exclude: /node_modules/,
+              use: { loader: 'swc-loader' },
+            },
+            {
+              test: /\.scss$/,
+              exclude: /node_modules\/(?!(@patternfly|@openshift-console\/plugin-shared)\/).*/,
+              use: ['style-loader', 'css-loader', 'sass-loader'],
+            },
+            {
+              test: /\.css$/,
+              use: ['style-loader', 'css-loader'],
+            },
+            {
+              test: /\.(png|jpg|jpeg|gif|svg|woff2?|ttf|eot|otf)(\?.*$|$)/,
+              type: 'asset/resource',
+            },
+            {
+              test: /\.m?js/,
+              resolve: { fullySpecified: false },
+            },
+          ],
+        },
+        plugins: [
+          new DefinePlugin({
+            'process.env.I18N_NAMESPACE': JSON.stringify('plugin__monitoring-plugin'),
+          }),
+          new NormalModuleReplacementPlugin(
+            /helpers\/OlsToolUIPersesWrapper/,
+            path.resolve(__dirname, 'cypress/component/mocks/OlsToolUIPersesWrapper.tsx'),
+          ),
+          new NormalModuleReplacementPlugin(
+            /helpers\/AddToDashboardButton/,
+            path.resolve(__dirname, 'cypress/component/mocks/AddToDashboardButton.tsx'),
+          ),
+        ],
+      },
+    },
+    specPattern: './cypress/component/**/*.cy.{js,jsx,ts,tsx}',
+    supportFile: './cypress/support/component.ts',
+  },
 });

web/cypress/CYPRESS_TESTING_GUIDE.md

@@ -67,6 +67,7 @@ The Monitoring Plugin uses a 3-layer architecture for test organization:
 
 ```
 cypress/
+├── component/                # Component tests (isolated, no cluster needed)
 ├── e2e/
 │   ├── monitoring/           # Core monitoring tests (Administrator)
 │   │   ├── 00.bvt_admin.cy.ts
@@ -81,7 +82,9 @@ cypress/
 │   │   ├── 02.reg_metrics.cy.ts
 │   │   └── 03.reg_legacy_dashboards.cy.ts
 │   ├── perses/               # COO/Perses scenarios
-│   └── commands/             # Custom Cypress commands
+│   ├── commands/             # Custom Cypress commands
+│   ├── component.ts          # Component test support (mount command)
+│   └── component-index.html  # HTML template for component mounting
 └── views/                    # Page object models (reusable actions)
 ```
 
@@ -92,7 +95,65 @@ cypress/
 
 ---
 
-## Creating Tests
+## Component Testing
+
+Component tests mount individual React components in isolation using Cypress, without requiring a running OpenShift cluster. They provide fast feedback for rendering logic, props handling, and interactions.
+
+### When to Use Component Tests vs E2E Tests
+
+| Use Component Tests When | Use E2E Tests When |
+|---|---|
+| Testing rendering and visual output | Testing full user workflows |
+| Verifying props and conditional display | Testing navigation between pages |
+| Validating empty/error states | Testing API integration |
+| Fast feedback during development | Testing cross-component interactions |
+
+### Writing Component Tests
+
+Component test files use the `.cy.tsx` extension and live in `cypress/component/`:
+
+```typescript
+import React from 'react';
+import { Labels } from '../../src/components/labels';
+
+describe('Labels', () => {
+  it('renders "No labels" when labels is empty', () => {
+    cy.mount(<Labels labels={{}} />);
+    cy.contains('No labels').should('be.visible');
+  });
+
+  it('renders a single label', () => {
+    cy.mount(<Labels labels={{ app: 'monitoring' }} />);
+    cy.contains('app').should('be.visible');
+    cy.contains('monitoring').should('be.visible');
+  });
+});
+```
+
+### Running Component Tests
+
+```bash
+cd web
+
+# Interactive mode (GUI) - best for development
+npm run cypress:open:component
+
+# Headless mode - best for CI
+npm run cypress:run:component
+
+# Run a single component test file
+npx cypress run --component --spec cypress/component/labels.cy.tsx
+```
+
+### Key Differences from E2E Tests
+
+- **No cluster required**: Components are mounted directly in the browser
+- **Custom mount command**: Use `cy.mount(<Component />)` instead of `cy.visit()`
+- **Support file**: Uses `cypress/support/component.ts` (not `cypress/support/index.ts`)
+
+---
+
+## Creating E2E Tests
 
 ### Workflow
 
@@ -133,11 +194,12 @@ export const runAlertTests = (perspective: string) => {
 
 | Scenario | Action |
 |----------|--------|
-| New UI feature | Create new test scenario in support/ |
+| New UI feature | Create new E2E test scenario in support/ |
 | Bug fix | Add test case to existing support file |
 | Component update | Update existing test scenarios |
-| New Perses feature | Create new test scenario in support/ |
-| ACM integration | Add test in e2e/coo/ |
+| New Perses feature | Create new E2E test scenario in support/ |
+| ACM integration | Add E2E test in e2e/coo/ |
+| Isolated component logic | Add component test in component/ |
 
 ### Best Practices
 

web/cypress/README.md

@@ -407,20 +407,34 @@ export CYPRESS_SESSION=true
 
 ---
 
+## Component Testing
+
+Cypress component tests mount individual React components in isolation, without a running cluster. They provide fast feedback for testing rendering logic, props handling, and user interactions. See **[CYPRESS_TESTING_GUIDE.md](CYPRESS_TESTING_GUIDE.md)** for more guidance on how
+to write and run the tests.
+
+### Configuration
+
+Component testing is configured in the `component` section of `web/cypress.config.ts`. It uses a standalone webpack config with `swc-loader` and a custom `mount` command (compatible with React 17) defined in `cypress/support/component.ts`.
+
+---
+
 ## Test Organization
 
 ### Directory Structure
 
 ```
 cypress/
-├── e2e/                    # Test files by perspective
+├── component/              # Component test files (.cy.tsx)
+├── e2e/                    # E2E test files by perspective
 │   ├── monitoring/         # Core monitoring (Administrator)
 │   ├── coo/               # COO-specific tests
 │   └── virtualization/    # Virtualization integration
 ├── support/               # Reusable test scenarios
 │   ├── monitoring/        # Test scenario modules
 │   ├── perses/           # Perses scenarios
-│   └── commands/         # Custom Cypress commands
+│   ├── commands/         # Custom Cypress commands
+│   ├── component.ts      # Component test support
+│   └── component-index.html # Component test HTML template
 ├── views/                # Page object models
 ├── fixtures/             # Test data and mocks
 └── E2E_TEST_SCENARIOS.md # Complete test catalog

web/cypress/component/labels.cy.tsx

@@ -0,0 +1,44 @@
+import { Labels } from '../../src/components/labels';
+
+describe('Labels', () => {
+  it('renders "No labels" when labels is empty', () => {
+    cy.mount(<Labels labels={{}} />);
+    cy.contains('No labels').should('be.visible');
+  });
+
+  it('renders "No labels" when labels is undefined', () => {
+    cy.mount(<Labels labels={undefined} />);
+    cy.contains('No labels').should('be.visible');
+  });
+
+  it('renders a single label', () => {
+    cy.mount(<Labels labels={{ app: 'monitoring' }} />);
+    cy.contains('app').should('be.visible');
+    cy.contains('monitoring').should('be.visible');
+  });
+
+  it('renders multiple labels', () => {
+    const labels = {
+      app: 'monitoring',
+      env: 'production',
+      team: 'platform',
+    };
+    cy.mount(<Labels labels={labels} />);
+
+    cy.contains('app').should('be.visible');
+    cy.contains('monitoring').should('be.visible');
+    cy.contains('env').should('be.visible');
+    cy.contains('production').should('be.visible');
+    cy.contains('team').should('be.visible');
+    cy.contains('platform').should('be.visible');
+  });
+
+  it('renders label with key=value format', () => {
+    cy.mount(<Labels labels={{ severity: 'critical' }} />);
+    cy.get('.pf-v6-c-label').within(() => {
+      cy.contains('severity');
+      cy.contains('=');
+      cy.contains('critical');
+    });
+  });
+});

web/cypress/component/mocks/AddToDashboardButton.tsx

@@ -0,0 +1,8 @@
+export const AddToDashboardButton = ({ query, name, description }) => (
+  <button
+    data-testid="add-to-dashboard"
+    data-name={name}
+    data-query={query}
+    data-description={description}
+  />
+);

web/cypress/component/mocks/OlsToolUIPersesWrapper.tsx

@@ -0,0 +1,7 @@
+import React from 'react';
+
+export const OlsToolUIPersesWrapper = ({ children, initialTimeRange }) => (
+  <div data-testid="perses-wrapper" data-time-range={JSON.stringify(initialTimeRange)}>
+    {children}
+  </div>
+);

web/cypress/component/mocks/perses-dashboards.tsx

@@ -0,0 +1,10 @@
+import React from 'react';
+
+export const Panel = ({ definition, panelOptions }) => (
+  <div data-testid="mock-panel">
+    <div data-testid="panel-definition" data-definition={JSON.stringify(definition)} />
+    {panelOptions?.extra && <div data-testid="panel-extra">{panelOptions.extra()}</div>}
+  </div>
+);
+
+export const VariableProvider = ({ children }) => <>{children}</>;

web/cypress/component/mocks/perses-plugin-system.tsx

@@ -0,0 +1,2 @@
+export const DataQueriesProvider = ({ children }) => children;
+export const TimeRangeProviderBasic = ({ children }) => children;

web/cypress/component/mocks/perses-prometheus-plugin.ts

@@ -0,0 +1,2 @@
+// DurationString is used as a type-only import, so no runtime export needed
+export type DurationString = string;