adding ScatterChart2CsvConverterTest

docs/SymptomsCausedByCOVIDLots/js/ScatterChart2CsvConverter.js

@@ -0,0 +1,18 @@
+class ScatterChart2CsvConverter {
+
+    static convertScatterChart2Csv({ symptomX, symptomY, batches, data }) {
+        const header = `"Batch","PRR ratio of Batch for ${symptomX}","PRR ratio of Batch for ${symptomY}"`;
+        return `${header}\n${ScatterChart2CsvConverter.#asCsv(batches, data)}`;
+    }
+
+    static #asCsv(batches, data) {
+        return Utils
+            .zip([batches, data])
+            .map(([batch, { x, y }]) => `${ScatterChart2CsvConverter.#quote(batch)},${x},${y}`)
+            .join('\n');
+    }
+
+    static #quote(str) {
+        return '"' + str + '"';
+    }
+}