From 2ff83ce667428b32f3e22acadebf0ce2677a0478 Mon Sep 17 00:00:00 2001
From: Karishma Chadha <kchadha@scratch.mit.edu>
Date: Mon, 23 May 2022 18:02:14 -0400
Subject: [PATCH] Add tests for missing and corrupt pngs in sb3 and sprite3
files
---
test/fixtures/corrupt_png.sb3 | Bin 0 -> 16188 bytes
test/fixtures/corrupt_png.sprite3 | Bin 0 -> 15084 bytes
test/fixtures/missing_png.sb3 | Bin 0 -> 3150 bytes
test/fixtures/missing_png.sprite3 | Bin 0 -> 2046 bytes
test/integration/sb3_corrupted_png.js | 126 ++++++++++++++++++++++
test/integration/sb3_missing_png.js | 111 +++++++++++++++++++
test/integration/sprite3_corrupted_png.js | 125 +++++++++++++++++++++
test/integration/sprite3_missing_png.js | 107 ++++++++++++++++++
8 files changed, 469 insertions(+)
create mode 100644 test/fixtures/corrupt_png.sb3
create mode 100644 test/fixtures/corrupt_png.sprite3
create mode 100644 test/fixtures/missing_png.sb3
create mode 100644 test/fixtures/missing_png.sprite3
create mode 100644 test/integration/sb3_corrupted_png.js
create mode 100644 test/integration/sb3_missing_png.js
create mode 100644 test/integration/sprite3_corrupted_png.js
create mode 100644 test/integration/sprite3_missing_png.js
diff --git a/test/fixtures/corrupt_png.sb3 b/test/fixtures/corrupt_png.sb3
new file mode 100644
index 0000000000000000000000000000000000000000..acc4822166ce8a3762caaebf28f203aed480aa51
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diff --git a/test/fixtures/corrupt_png.sprite3 b/test/fixtures/corrupt_png.sprite3
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diff --git a/test/integration/sb3_corrupted_png.js b/test/integration/sb3_corrupted_png.js
new file mode 100644
index 000000000..dd02ca4fd
--- /dev/null
+++ b/test/integration/sb3_corrupted_png.js
@@ -0,0 +1,126 @@
+/**
+ * This test mocks render breaking on loading a corrupted bitmap costume.
+ * The VM should handle this safely by displaying a Gray Question Mark,
+ * but keeping track of the original costume data and serializing the
+ * original costume data back out. The saved project.json should not
+ * reflect that the costume is broken and should therefore re-attempt
+ * to load the costume if the saved project is re-loaded.
+ */
+const path = require('path');
+const tap = require('tap');
+const md5 = require('js-md5');
+const makeTestStorage = require('../fixtures/make-test-storage');
+const FakeRenderer = require('../fixtures/fake-renderer');
+const FakeBitmapAdapter = require('../fixtures/fake-bitmap-adapter');
+const {extractAsset, readFileToBuffer} = require('../fixtures/readProjectFile');
+const VirtualMachine = require('../../src/index');
+const {serializeCostumes} = require('../../src/serialization/serialize-assets');
+
+const projectUri = path.resolve(__dirname, '../fixtures/corrupt_png.sb3');
+const project = readFileToBuffer(projectUri);
+const costumeFileName = 'e1320c21995dcf6de10119be7f08c26b.png';
+const originalCostume = extractAsset(projectUri, costumeFileName);
+// We need to get the actual md5 because we hand modified the png to corrupt it
+// after we downloaded the project from Scratch
+// Loading the project back into the VM will correct the assetId and md5
+const brokenCostumeMd5 = md5(originalCostume);
+
+global.Image = function () {
+ const image = {
+ width: 1,
+ height: 1
+ };
+ setTimeout(() => {
+ const base64Image = image.src.split(',')[1];
+ const decodedText = Buffer.from(base64Image, 'base64').toString();
+ if (decodedText.includes('Here is some')) {
+ image.onerror();
+ } else {
+ image.onload();
+ }
+ }, 1000);
+ return image;
+};
+
+global.document = {
+ createElement: () => ({
+ // Create mock canvas
+ getContext: () => ({
+ drawImage: () => ({})
+ })
+ })
+};
+
+let vm;
+let defaultBitmapAssetId;
+
+tap.beforeEach(() => {
+ const storage = makeTestStorage();
+
+ vm = new VirtualMachine();
+ vm.attachStorage(storage);
+ defaultBitmapAssetId = vm.runtime.storage.defaultAssetId.ImageBitmap;
+
+ vm.attachRenderer(new FakeRenderer());
+ vm.attachV2BitmapAdapter(new FakeBitmapAdapter());
+
+ return vm.loadProject(project);
+});
+
+const test = tap.test;
+
+test('load sb3 project with corrupted bitmap costume file', t => {
+ t.equal(vm.runtime.targets.length, 2);
+
+ const stage = vm.runtime.targets[0];
+ t.ok(stage.isStage);
+
+ const greenGuySprite = vm.runtime.targets[1];
+ t.equal(greenGuySprite.getName(), 'Green Guy');
+ t.equal(greenGuySprite.getCostumes().length, 1);
+
+ const corruptedCostume = greenGuySprite.getCostumes()[0];
+ t.equal(corruptedCostume.name, 'Green Guy');
+ t.equal(corruptedCostume.assetId, defaultBitmapAssetId);
+ t.equal(corruptedCostume.dataFormat, 'png');
+ // Runtime should have info about broken asset
+ t.ok(corruptedCostume.broken);
+ t.equal(corruptedCostume.broken.assetId, brokenCostumeMd5);
+ // Verify that we saved the original asset data
+ t.equal(md5(corruptedCostume.broken.asset.data), brokenCostumeMd5);
+
+ t.end();
+});
+
+test('load and then save project with corrupted bitmap costume file', t => {
+ const resavedProject = JSON.parse(vm.toJSON());
+
+ t.equal(resavedProject.targets.length, 2);
+
+ const stage = resavedProject.targets[0];
+ t.ok(stage.isStage);
+
+ const greenGuySprite = resavedProject.targets[1];
+ t.equal(greenGuySprite.name, 'Green Guy');
+ t.equal(greenGuySprite.costumes.length, 1);
+
+ const corruptedCostume = greenGuySprite.costumes[0];
+ t.equal(corruptedCostume.name, 'Green Guy');
+ // Resaved project costume should have the metadata that corresponds to the original broken costume
+ t.equal(corruptedCostume.assetId, brokenCostumeMd5);
+ t.equal(corruptedCostume.dataFormat, 'png');
+ // Test that we didn't save any data about the costume being broken
+ t.notOk(corruptedCostume.broken);
+
+ t.end();
+});
+
+test('serializeCostume saves orignal broken costume', t => {
+ const costumeDescs = serializeCostumes(vm.runtime, vm.runtime.targets[1].id);
+ t.equal(costumeDescs.length, 1);
+ const costume = costumeDescs[0];
+ t.equal(costume.fileName, `${brokenCostumeMd5}.png`);
+ t.equal(md5(costume.fileContent), brokenCostumeMd5);
+ t.end();
+ process.nextTick(process.exit);
+});
diff --git a/test/integration/sb3_missing_png.js b/test/integration/sb3_missing_png.js
new file mode 100644
index 000000000..a16e17a66
--- /dev/null
+++ b/test/integration/sb3_missing_png.js
@@ -0,0 +1,111 @@
+/**
+ * This test ensures that the VM gracefully handles an sb3 project with
+ * a missing bitmap costume. The VM should handle this safely by displaying
+ * a Gray Question Mark, but keeping track of the original costume data
+ * and serializing the original costume data back out. The saved project.json
+ * should not reflect that the costume is broken and should therefore re-attempt
+ * to load the costume if the saved project is re-loaded.
+ */
+const path = require('path');
+const tap = require('tap');
+const makeTestStorage = require('../fixtures/make-test-storage');
+const FakeRenderer = require('../fixtures/fake-renderer');
+const FakeBitmapAdapter = require('../fixtures/fake-bitmap-adapter');
+const readFileToBuffer = require('../fixtures/readProjectFile').readFileToBuffer;
+const VirtualMachine = require('../../src/index');
+const {serializeCostumes} = require('../../src/serialization/serialize-assets');
+
+const projectUri = path.resolve(__dirname, '../fixtures/missing_png.sb3');
+const project = readFileToBuffer(projectUri);
+
+
+const missingCostumeAssetId = 'e1320c21995dcf6de10119be7f08c26b';
+
+global.Image = function () {
+ const image = {
+ width: 1,
+ height: 1
+ };
+ setTimeout(() => image.onload(), 1000);
+ return image;
+};
+
+global.document = {
+ createElement: () => ({
+ // Create mock canvas
+ getContext: () => ({
+ drawImage: () => ({})
+ })
+ })
+};
+
+let vm;
+
+tap.beforeEach(() => {
+ const storage = makeTestStorage();
+
+ vm = new VirtualMachine();
+ vm.attachStorage(storage);
+ vm.attachRenderer(new FakeRenderer());
+ vm.attachV2BitmapAdapter(new FakeBitmapAdapter());
+
+ return vm.loadProject(project);
+});
+
+const test = tap.test;
+
+test('loading sb3 project with missing bitmap costume file', t => {
+ t.equal(vm.runtime.targets.length, 2);
+
+ const stage = vm.runtime.targets[0];
+ t.ok(stage.isStage);
+
+ const greenGuySprite = vm.runtime.targets[1];
+ t.equal(greenGuySprite.getName(), 'Green Guy');
+ t.equal(greenGuySprite.getCostumes().length, 1);
+
+ const missingCostume = greenGuySprite.getCostumes()[0];
+ t.equal(missingCostume.name, 'Green Guy');
+ // Costume should have both default cosutme (e.g. Gray Question Mark) data and original data
+ const defaultVectorAssetId = vm.runtime.storage.defaultAssetId.ImageBitmap;
+ t.equal(missingCostume.assetId, defaultVectorAssetId);
+ t.equal(missingCostume.dataFormat, 'png');
+ // Runtime should have info about broken asset
+ t.ok(missingCostume.broken);
+ t.equal(missingCostume.broken.assetId, missingCostumeAssetId);
+
+ t.end();
+});
+
+test('load and then save sb3 project with missing costume file', t => {
+ const resavedProject = JSON.parse(vm.toJSON());
+
+ t.equal(resavedProject.targets.length, 2);
+
+ const stage = resavedProject.targets[0];
+ t.ok(stage.isStage);
+
+ const greenGuySprite = resavedProject.targets[1];
+ t.equal(greenGuySprite.name, 'Green Guy');
+ t.equal(greenGuySprite.costumes.length, 1);
+
+ const missingCostume = greenGuySprite.costumes[0];
+ t.equal(missingCostume.name, 'Green Guy');
+ // Costume should have both default cosutme (e.g. Gray Question Mark) data and original data
+ t.equal(missingCostume.assetId, missingCostumeAssetId);
+ t.equal(missingCostume.dataFormat, 'png');
+ // Test that we didn't save any data about the costume being broken
+ t.notOk(missingCostume.broken);
+
+ t.end();
+});
+
+test('serializeCostume does not save data for missing costume', t => {
+ const costumeDescs = serializeCostumes(vm.runtime);
+
+ t.equal(costumeDescs.length, 1); // Should only have one costume, the backdrop
+ t.not(costumeDescs[0].fileName, `${missingCostumeAssetId}.png`);
+
+ t.end();
+ process.nextTick(process.exit);
+});
diff --git a/test/integration/sprite3_corrupted_png.js b/test/integration/sprite3_corrupted_png.js
new file mode 100644
index 000000000..2898fa82a
--- /dev/null
+++ b/test/integration/sprite3_corrupted_png.js
@@ -0,0 +1,125 @@
+/**
+ * This test mocks render breaking on loading a sprite3 with a
+ * corrupted bitmap costume.
+ * The VM should handle this safely by displaying a Gray Question Mark,
+ * but keeping track of the original costume data and serializing the
+ * original costume data back out. The saved project.json should not
+ * reflect that the costume is broken and should therefore re-attempt
+ * to load the costume if the saved project is re-loaded.
+ */
+const path = require('path');
+const tap = require('tap');
+const md5 = require('js-md5');
+const makeTestStorage = require('../fixtures/make-test-storage');
+const FakeRenderer = require('../fixtures/fake-renderer');
+const FakeBitmapAdapter = require('../fixtures/fake-bitmap-adapter');
+const {extractAsset, readFileToBuffer} = require('../fixtures/readProjectFile');
+const VirtualMachine = require('../../src/index');
+const {serializeCostumes} = require('../../src/serialization/serialize-assets');
+
+const projectUri = path.resolve(__dirname, '../fixtures/default.sb3');
+const project = readFileToBuffer(projectUri);
+
+const spriteUri = path.resolve(__dirname, '../fixtures/corrupt_png.sprite3');
+const sprite = readFileToBuffer(spriteUri);
+
+const costumeFileName = 'e1320c21995dcf6de10119be7f08c26b.png';
+const originalCostume = extractAsset(spriteUri, costumeFileName);
+// We need to get the actual md5 because we hand modified the png to corrupt it
+// after we downloaded the project from Scratch
+// Loading the project back into the VM will correct the assetId and md5
+const brokenCostumeMd5 = md5(originalCostume);
+
+global.Image = function () {
+ const image = {
+ width: 1,
+ height: 1
+ };
+ setTimeout(() => {
+ const base64Image = image.src.split(',')[1];
+ const decodedText = Buffer.from(base64Image, 'base64').toString();
+ if (decodedText.includes('Here is some')) {
+ image.onerror();
+ } else {
+ image.onload();
+ }
+ }, 1000);
+ return image;
+};
+
+global.document = {
+ createElement: () => ({
+ // Create mock canvas
+ getContext: () => ({
+ drawImage: () => ({})
+ })
+ })
+};
+
+let vm;
+let defaultBitmapAssetId;
+
+tap.beforeEach(() => {
+ const storage = makeTestStorage();
+
+ vm = new VirtualMachine();
+ vm.attachStorage(storage);
+ defaultBitmapAssetId = vm.runtime.storage.defaultAssetId.ImageBitmap;
+
+ vm.attachRenderer(new FakeRenderer());
+ vm.attachV2BitmapAdapter(new FakeBitmapAdapter());
+
+ return vm.loadProject(project).then(() => vm.addSprite(sprite));
+});
+
+const test = tap.test;
+
+test('load sprite3 with corrupted bitmap costume file', t => {
+ t.equal(vm.runtime.targets.length, 3);
+
+ const stage = vm.runtime.targets[0];
+ t.ok(stage.isStage);
+
+ const greenGuySprite = vm.runtime.targets[2];
+ t.equal(greenGuySprite.getName(), 'Green Guy');
+ t.equal(greenGuySprite.getCostumes().length, 1);
+
+ const corruptedCostume = greenGuySprite.getCostumes()[0];
+ t.equal(corruptedCostume.name, 'Green Guy');
+ t.equal(corruptedCostume.assetId, defaultBitmapAssetId);
+ t.equal(corruptedCostume.dataFormat, 'png');
+ // Runtime should have info about broken asset
+ t.ok(corruptedCostume.broken);
+ t.equal(corruptedCostume.broken.assetId, brokenCostumeMd5);
+ // Verify that we saved the original asset data
+ t.equal(md5(corruptedCostume.broken.asset.data), brokenCostumeMd5);
+
+ t.end();
+});
+
+test('load and then save sprite with corrupted costume file', t => {
+ const resavedSprite = JSON.parse(vm.toJSON(vm.runtime.targets[2].id));
+
+ t.equal(resavedSprite.name, 'Green Guy');
+ t.equal(resavedSprite.costumes.length, 1);
+
+ const corruptedCostume = resavedSprite.costumes[0];
+ t.equal(corruptedCostume.name, 'Green Guy');
+ // Resaved project costume should have the metadata that corresponds to the original broken costume
+ t.equal(corruptedCostume.assetId, brokenCostumeMd5);
+ t.equal(corruptedCostume.dataFormat, 'png');
+ // Test that we didn't save any data about the costume being broken
+ t.notOk(corruptedCostume.broken);
+
+ t.end();
+});
+
+test('serializeCostume saves orignal broken costume', t => {
+ const costumeDescs = serializeCostumes(vm.runtime, vm.runtime.targets[2].id);
+ t.equal(costumeDescs.length, 1);
+ const costume = costumeDescs[0];
+ t.equal(costume.fileName, `${brokenCostumeMd5}.png`);
+ t.equal(md5(costume.fileContent), brokenCostumeMd5);
+ t.end();
+ process.nextTick(process.exit);
+});
diff --git a/test/integration/sprite3_missing_png.js b/test/integration/sprite3_missing_png.js
new file mode 100644
index 000000000..bbc7a816c
--- /dev/null
+++ b/test/integration/sprite3_missing_png.js
@@ -0,0 +1,107 @@
+/**
+ * This test ensures that the VM gracefully handles a sprite3 file with
+ * a missing bitmap costume. The VM should handle this safely by displaying
+ * a Gray Question Mark, but keeping track of the original costume data
+ * and serializing the original costume data back out. The saved project.json
+ * should not reflect that the costume is broken and should therefore re-attempt
+ * to load the costume if the saved project is re-loaded.
+ */
+const path = require('path');
+const tap = require('tap');
+const makeTestStorage = require('../fixtures/make-test-storage');
+const FakeRenderer = require('../fixtures/fake-renderer');
+const FakeBitmapAdapter = require('../fixtures/fake-bitmap-adapter');
+const readFileToBuffer = require('../fixtures/readProjectFile').readFileToBuffer;
+const VirtualMachine = require('../../src/index');
+const {serializeCostumes} = require('../../src/serialization/serialize-assets');
+
+// The particular project that we're loading doesn't matter for this test
+const projectUri = path.resolve(__dirname, '../fixtures/default.sb3');
+const project = readFileToBuffer(projectUri);
+
+const spriteUri = path.resolve(__dirname, '../fixtures/missing_png.sprite3');
+const sprite = readFileToBuffer(spriteUri);
+
+const missingCostumeAssetId = 'e1320c21995dcf6de10119be7f08c26b';
+
+global.Image = function () {
+ const image = {
+ width: 1,
+ height: 1
+ };
+ setTimeout(() => image.onload(), 1000);
+ return image;
+};
+
+global.document = {
+ createElement: () => ({
+ // Create mock canvas
+ getContext: () => ({
+ drawImage: () => ({})
+ })
+ })
+};
+
+let vm;
+
+tap.beforeEach(() => {
+ const storage = makeTestStorage();
+
+ vm = new VirtualMachine();
+ vm.attachStorage(storage);
+ vm.attachRenderer(new FakeRenderer());
+ vm.attachV2BitmapAdapter(new FakeBitmapAdapter());
+
+ return vm.loadProject(project).then(() => vm.addSprite(sprite));
+});
+
+const test = tap.test;
+
+test('loading sprite3 with missing bitmap costume file', t => {
+ t.equal(vm.runtime.targets.length, 3);
+
+ const stage = vm.runtime.targets[0];
+ t.ok(stage.isStage);
+
+ const greenGuySprite = vm.runtime.targets[2];
+ t.equal(greenGuySprite.getName(), 'Green Guy');
+ t.equal(greenGuySprite.getCostumes().length, 1);
+
+ const missingCostume = greenGuySprite.getCostumes()[0];
+ t.equal(missingCostume.name, 'Green Guy');
+ // Costume should have both default cosutme (e.g. Gray Question Mark) data and original data
+ const defaultBitmapAssetId = vm.runtime.storage.defaultAssetId.ImageBitmap;
+ t.equal(missingCostume.assetId, defaultBitmapAssetId);
+ t.equal(missingCostume.dataFormat, 'png');
+ // Runtime should have info about broken asset
+ t.ok(missingCostume.broken);
+ t.equal(missingCostume.broken.assetId, missingCostumeAssetId);
+
+ t.end();
+});
+
+test('load and then save sprite3 with missing bitmap costume file', t => {
+ const resavedSprite = JSON.parse(vm.toJSON(vm.runtime.targets[2].id));
+
+ t.equal(resavedSprite.name, 'Green Guy');
+ t.equal(resavedSprite.costumes.length, 1);
+
+ const missingCostume = resavedSprite.costumes[0];
+ t.equal(missingCostume.name, 'Green Guy');
+ // Costume should have both default cosutme (e.g. Gray Question Mark) data and original data
+ t.equal(missingCostume.assetId, missingCostumeAssetId);
+ t.equal(missingCostume.dataFormat, 'png');
+ // Test that we didn't save any data about the costume being broken
+ t.notOk(missingCostume.broken);
+
+ t.end();
+});
+
+test('serializeCostume does not save data for missing costume', t => {
+ const costumeDescs = serializeCostumes(vm.runtime, vm.runtime.targets[2].id);
+
+ t.equal(costumeDescs.length, 0);
+
+ t.end();
+ process.nextTick(process.exit);
+});