test(3dtiles): add 3D Tiles batch table parsing tests

iTowns · Oct 26, 2022 · f3bd6c7 · f3bd6c7
1 parent 47325ab
commit f3bd6c7
Showing 1 changed file with 57 additions and 0 deletions.
diff --git a/test/unit/3dtilesbatchtable.js b/test/unit/3dtilesbatchtable.js
@@ -0,0 +1,57 @@
+import assert from 'assert';
+import C3DTBatchTable from 'Core/3DTiles/C3DTBatchTable';
+
+describe('3D Tiles batch table', function () {
+    // encode a javascript object into an arraybuffer (based on the 3D Tiles batch table encoding)
+    function obj2ArrayBuff(obj) {
+        const objJSON = JSON.stringify(obj);
+        const encoder = new TextEncoder();
+        const objUtf8 = encoder.encode(objJSON);
+        const objUint8 = new Uint8Array(objUtf8);
+        return objUint8.buffer;
+    }
+
+    it('Should parse JSON batch table from buffer', function () {
+        const batchTable = {
+            a1: ['bah', 'tah', 'ratata', 'lo'],
+            a2: [0, 1, 2, 3],
+        };
+
+        const batchTableBuffer = obj2ArrayBuff(batchTable);
+
+        const batchTableObj = new C3DTBatchTable(batchTableBuffer, batchTableBuffer.byteLength, 0, 4, {});
+
+        assert.deepStrictEqual(batchTable, batchTableObj.content);
+    });
+
+    it('Should parse JSON and binary batch table from buffer', function () {
+        const a1Val = ['bah', 'tah', 'ratata'];
+        const binVal = [0, 1, 0];
+        const expectedBatchTable = {
+            a1: a1Val,
+            bin: binVal,
+        };
+
+        const batchTableJsonPart = {
+            a1: a1Val,
+            bin: {
+                byteOffset: 0,
+                componentType: 'UNSIGNED_BYTE',
+                type: 'SCALAR',
+            },
+        };
+
+        const jsonPartBuffer = obj2ArrayBuff(batchTableJsonPart);
+
+        const binPartUint8 = new Uint8Array(binVal);
+        const binPartBuffer = binPartUint8.buffer;
+
+        var batchTableBuffer = new Uint8Array(jsonPartBuffer.byteLength + binPartBuffer.byteLength);
+        batchTableBuffer.set(new Uint8Array(jsonPartBuffer), 0);
+        batchTableBuffer.set(new Uint8Array(binPartBuffer), jsonPartBuffer.byteLength);
+
+        const batchTableObj = new C3DTBatchTable(batchTableBuffer, jsonPartBuffer.byteLength, binPartBuffer.byteLength, 3, {});
+
+        assert.deepStrictEqual(expectedBatchTable, batchTableObj.content);
+    });
+});