chore: saving state in the form

Signed-off-by: blam <ben@blam.sh>

plugins/scaffolder/src/next/TemplateWizardPage/Stepper/Stepper.test.tsx

@@ -0,0 +1,136 @@
+/*
+ * Copyright 2022 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import React from 'react';
+import { TemplateParameterSchema } from '../../../types';
+import { Stepper } from './Stepper';
+import { renderInTestApp } from '@backstage/test-utils';
+import { fireEvent } from '@testing-library/react';
+
+describe('Stepper', () => {
+  it('should render the step titles for each step of the manifest', async () => {
+    const manifest: TemplateParameterSchema = {
+      steps: [
+        { title: 'Step 1', schema: { properties: {} } },
+        { title: 'Step 2', schema: { properties: {} } },
+      ],
+      title: 'React JSON Schema Form Test',
+    };
+
+    const { getByText } = await renderInTestApp(
+      <Stepper manifest={manifest} extensions={[]} />,
+    );
+
+    for (const step of manifest.steps) {
+      expect(getByText(step.title)).toBeInTheDocument();
+    }
+  });
+
+  it('should render next / review button', async () => {
+    const manifest: TemplateParameterSchema = {
+      steps: [
+        { title: 'Step 1', schema: { properties: {} } },
+        { title: 'Step 2', schema: { properties: {} } },
+      ],
+      title: 'React JSON Schema Form Test',
+    };
+
+    const { getByText } = await renderInTestApp(
+      <Stepper manifest={manifest} extensions={[]} />,
+    );
+
+    expect(getByText('Next')).toBeInTheDocument();
+
+    await fireEvent.click(getByText('Next'));
+
+    expect(getByText('Review')).toBeInTheDocument();
+  });
+
+  it('should remember the state of the form when cycling through the pages', async () => {
+    const manifest: TemplateParameterSchema = {
+      steps: [
+        {
+          title: 'Step 1',
+          schema: {
+            properties: {
+              name: {
+                type: 'string',
+              },
+            },
+          },
+        },
+        {
+          title: 'Step 2',
+          schema: {
+            properties: {
+              description: {
+                type: 'string',
+              },
+            },
+          },
+        },
+      ],
+      title: 'React JSON Schema Form Test',
+    };
+
+    const { getByRole, getByText } = await renderInTestApp(
+      <Stepper manifest={manifest} extensions={[]} />,
+    );
+
+    await fireEvent.change(getByRole('textbox', { name: 'name' }), {
+      target: { value: 'im a test value' },
+    });
+
+    await fireEvent.click(getByText('Next'));
+
+    await fireEvent.click(getByText('Back'));
+
+    expect(getByRole('textbox', { name: 'name' })).toHaveValue(
+      'im a test value',
+    );
+  });
+
+  it('should render custom field extensions properly', async () => {
+    const MockComponent = () => {
+      return <h1>im a custom field extension</h1>;
+    };
+
+    const manifest: TemplateParameterSchema = {
+      title: 'Custom Fields',
+      steps: [
+        {
+          title: 'Test',
+          schema: {
+            properties: {
+              name: {
+                type: 'string',
+                'ui:field': 'Mock',
+              },
+            },
+          },
+        },
+      ],
+    };
+
+    const { getByText } = await renderInTestApp(
+      <Stepper
+        manifest={manifest}
+        extensions={[{ name: 'Mock', component: MockComponent }]}
+      />,
+    );
+
+    expect(getByText('im a custom field extension')).toBeInTheDocument();
+  });
+});

plugins/scaffolder/src/next/TemplateWizardPage/Stepper/Stepper.tsx

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import { JsonObject } from '@backstage/types';
 import {
   Stepper as MuiStepper,
   Step as MuiStep,
@@ -51,6 +52,7 @@ const Form = withTheme(MuiTheme);
 export const Stepper = (props: StepperProps) => {
   const { steps } = useTemplateSchema(props.manifest);
   const [activeStep, setActiveStep] = useState(0);
+  const [formState, setFormState] = useState({});
   const styles = useStyles();
 
   const extensions = useMemo(() => {
@@ -62,8 +64,10 @@ export const Stepper = (props: StepperProps) => {
   const handleBack = () => {
     setActiveStep(prevActiveStep => prevActiveStep - 1);
   };
-  const handleNext = () => {
+
+  const handleNext = ({ formData }: { formData: JsonObject }) => {
     setActiveStep(prevActiveStep => prevActiveStep + 1);
+    setFormState(current => ({ ...current, ...formData }));
   };
 
   return (
@@ -77,6 +81,7 @@ export const Stepper = (props: StepperProps) => {
       </MuiStepper>
       <div className={styles.formWrapper}>
         <Form
+          formData={formState}
           schema={steps[activeStep].schema}
           uiSchema={steps[activeStep].uiSchema}
           onSubmit={handleNext}