test: add testing cases

Author: EscapedGibbon

src/save/__tests__/encodeBase64.test.ts

@@ -0,0 +1,100 @@
+
+import { vi } from "vitest";
+
+import { createRgbaImage } from "../../../test/testUtils.js";
+import { encode } from "../encode.js";
+import { encodeBase64 } from "../encodeBase64.js";
+
+test("basic image (png)",()=>{
+  const image = testUtils.createGreyImage([
+    [0, 0, 0, 0, 0],
+    [0, 255, 255, 255, 0],
+    [0, 255, 0, 255, 0],
+    [0, 255, 255, 255, 0],
+    [255, 0, 255, 0, 255],
+  ]);
+  const base64Url = encodeBase64(image,'png');
+
+  expect(base64Url).toBe("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAAAAACoBHk5AAAAFklEQVR4XmNggID///+DSCCEskHM/wCAnQr2TY5mOAAAAABJRU5ErkJggg==");
+});
+
+test("basic image 2 (jpeg)",()=>{
+  const image = testUtils.createGreyImage([
+    [255, 255, 255, 255, 255],
+    [255, 0, 0, 0, 255],
+    [255, 0, 0, 0, 255],
+    [255, 0, 0, 0, 255],
+    [255, 255, 255, 255, 255],
+  ]);
+  const format = 'jpeg'
+  const base64 = encodeBase64(image,format);
+  const base64Data = Buffer.from(encode(image,{format}))
+  .toString('base64');
+  expect(typeof base64).toBe('string');
+  expect(base64Data).toBe(base64.slice( base64.indexOf(',') + 1));
+});
+
+test("legacy image-js test",()=>{
+  const image = createRgbaImage([[
+    255,
+    0,
+    0,
+    255, // red
+    0,
+    255,
+    0, 
+    255,// green
+    0,
+    0,
+    255, 
+    255 // blue
+  ],[255,
+      255,
+      0, 
+      255,// yellow
+      255,
+      0,
+      255, 
+      255,// magenta
+      0,
+      255,
+      255, 
+      255,// cyan
+    ],[ 0,
+        0,
+       0, 
+        255,// black
+        255,
+        255,
+        255,
+        255, // white
+        127,
+        127,
+        127,
+        255,//grey 
+        ]]);
+      const format = 'jpeg';  
+      const url = encodeBase64(image,format); 
+      const base64Data = Buffer.from(encode(image,{format}))
+      .toString('base64')
+      expect(typeof url).toBe('string');
+      expect(base64Data).toBe(url.slice(url.indexOf(',') + 1));
+})
+test("browser testing",()=>{
+  const image = testUtils.createGreyImage([
+    [255, 255, 255, 255, 255],
+    [255, 0, 0, 0, 255],
+    [255, 0, 0, 0, 255],
+    [255, 0, 0, 0, 255],
+    [255, 255, 255, 255, 255],
+  ]);
+  const base64Node = encodeBase64(image,'jpg');
+ vi.stubGlobal('window',()=>{
+  const base64Browser = encodeBase64(image,'jpg');
+  expect(base64Browser).not.toBe(base64Node);
+ })
+ vi.stubGlobal('document',()=>{
+  const base64Browser = encodeBase64(image,'jpg');
+  expect(base64Browser).not.toBe(base64Node);
+ })
+})