WIP: example master slide background modifier. Starting point only.

Author: MP70

__tests__/EXAMPLE-slide-bg.test.ts

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+import * as ModifyBackground from '../src/modify/modify-background'; // Adjust
+import Automizer from '../src/automizer';
+
+describe('ModifyMasterBackground', () => {
+    beforeEach(() => {
+        // Initialize the automizer instance
+        const automizer = new Automizer({
+            templateDir: `${__dirname}/pptx-templates`,
+            outputDir: `${__dirname}/pptx-output`,
+          });
+        
+        const pres = await automizer
+        .loadRoot(`EmptyTemplate.pptx`)
+    });
+
+    test('should allow setting a background color on a master slide', async () => {
+        const masterId = 1; // Example master slide ID
+        const newColor = 'FF5733'; // Example new color
+
+        // Modify the master slide by setting a new background color
+        await pres.addMaster(masterId, (master) => {
+            master.modifyBackground.setBackgroundColor(master, newColor);
+        });
+
+        // Later on we could add a way to getMasterInfo or something that could either be the raw xml, or more helpfully a {background:{backgroundImage:"",backgroundColor:""}}
+        // Retrieve the modified master slide and verify the background color
+        const modifiedMaster = await pres.getMasterInfo(masterId);
+        expect(modifiedMaster.backgroundColor).toBe(newColor); // Assuming the master slide object has a backgroundColor property
+    });
+
+    test('should allow setting a background image on a master slide', async () => {
+        const masterId = 1; // Example master slide ID
+        const newImage = 'path/to/new/image.jpg'; // Example new image path
+
+        // Modify the master slide by setting a new background image
+        await automizer.addMaster(masterId, (master) => {
+            master.modifyBackground.setBackgroundImage(master, newImage);
+        });
+        // Later on we could add a way to getMasterInfo or something that could either be the raw xml, or more helpfully a {background:{backgroundImage:"",backgroundColor:""}}
+        // Retrieve the modified master slide and verify the background image
+        const modifiedMaster = await pres.getMasterInfo(masterId);
+        expect(modifiedMaster.backgroundImage).toBe(newImage); // Assuming the master slide object has a backgroundImage property
+    });
+
+    // Additional tests for edge cases, error handling, etc.
+});