Add track and evaluation with details

src/__tests__/node.spec.js

@@ -1,7 +1,13 @@
 import tape from 'tape-catch';
 
 import clientSuite from './nodeSuites/client.spec.js';
+import providerSuite from './nodeSuites/provider.spec.js';
 
-tape('## OpenFeature JavaScript Split Provider - tests', async function (assert) {
+tape('## OpenFeature JavaScript Split Client - tests', async function (assert) {
   assert.test('Client Tests', clientSuite);
-});
+});
+
+
+tape('## OpenFeature JavaScript Split Provider - tests', async function (assert) {
+  assert.test('Provider Tests', providerSuite);
+});

src/__tests__/nodeSuites/client.spec.js

@@ -49,11 +49,11 @@ export default async function(assert) {
   const getBooleanSplitWithKeyTest = async (client) => {
     let result = await client.getBooleanDetails('my_feature', false);
     assert.equals(result.value, true);
-    assert.looseEquals(result.flagMetadata, { desc: 'this applies only to ON treatment' });
+    assert.looseEquals(result.flagMetadata, { config: '{"desc" : "this applies only to ON treatment"}' });
 
     result = await client.getBooleanDetails('my_feature', true, { targetingKey: 'randomKey' });
     assert.equals(result.value, false);
-    assert.looseEquals(result.flagMetadata, {});
+    assert.looseEquals(result.flagMetadata, { config: ''});
   };
 
   const getStringSplitTest = async (client) => {

src/__tests__/nodeSuites/provider.spec.js

@@ -1,3 +1,6 @@
+import { ParseError } from "@openfeature/server-sdk";
+import { makeProviderWithSpy } from "../testUtils";
+
 export default async function(assert) {
 
   const shouldFailWithBadApiKeyTest = () => {
@@ -80,6 +83,63 @@ export default async function(assert) {
     assert.equal(1, 1);
   };
 
+ const trackingSuite = (t) => {
+
+  t.test("track: throws when missing eventName", async (t) => {
+    const { provider } = makeProviderWithSpy();
+    try {
+      await provider.track("", { targetingKey: "u1", trafficType: "user" }, {});
+      t.fail("expected ParseError for eventName");
+    } catch (e) {
+      t.ok(e instanceof ParseError, "got ParseError");
+    }
+    t.end();
+  });
+
+  t.test("track: throws when missing trafficType", async (t) => {
+    const { provider } = makeProviderWithSpy();
+    try {
+      await provider.track("evt", { targetingKey: "u1" }, {});
+      t.fail("expected ParseError for trafficType");
+    } catch (e) {
+      t.ok(e instanceof ParseError, "got ParseError");
+    }
+    t.end();
+  });
+
+   t.test("track: ok without details", async (t) => {
+    const { provider, calls } = makeProviderWithSpy();
+    await provider.track("view", { targetingKey: "u1", trafficType: "user" }, null);
+
+    t.equal(calls.count, 1, "Split track called once");
+    t.deepEqual(
+      calls.args,
+      ["u1", "user", "view", undefined, {}],
+      "called with key, trafficType, eventName, 0, {}"
+    );
+    t.end();
+  });
+
+  t.test("track: ok with details", async (t) => {
+    const { provider, calls } = makeProviderWithSpy();
+    await provider.track(
+      "purchase",
+      { targetingKey: "u1", trafficType: "user" },
+      { value: 9.99, properties: { plan: "pro", beta: true } }
+    );
+
+    t.equal(calls.count, 1, "Split track called once");
+    t.equal(calls.args[0], "u1");
+    t.equal(calls.args[1], "user");
+    t.equal(calls.args[2], "purchase");
+    t.equal(calls.args[3], 9.99);
+    t.deepEqual(calls.args[4], { plan: "pro", beta: true });
+    t.end();
+  });
+}
+
+  trackingSuite(assert);
+
   shouldFailWithBadApiKeyTest();
 
   evalBooleanNullEmptyTest();

src/__tests__/testUtils/index.js

@@ -1,3 +1,5 @@
+import { OpenFeatureSplitProvider } from "../..";
+
 const DEFAULT_ERROR_MARGIN = 50; // 0.05 secs
 
 /**
@@ -67,3 +69,23 @@ export function url(settings, target) {
   }
   return `${settings.urls.sdk}${target}`;
 }
+
+
+/**
+ * Create a spy for the OpenFeatureSplitProvider.
+ * @returns {provider: OpenFeatureSplitProvider, calls: {count: number, args: any[]}}
+ */
+export function makeProviderWithSpy() {
+  const calls = { count: 0, args: null };
+  const track = (...args) => { calls.count++; calls.args = args; return true; };
+
+  const splitClient = {
+    __getStatus: () => ({ isReady: true }),
+    on: () => {},
+    Event: { SDK_READY: "SDK_READY" },
+    track,
+    getTreatmentWithConfig: () => ({ treatment: "on", config: "" }),
+  };
+
+  return { provider: new OpenFeatureSplitProvider({ splitClient }), calls };
+}

src/lib/js-split-provider.ts

@@ -7,6 +7,7 @@ import {
   JsonValue,
   TargetingKeyMissingError,
   StandardResolutionReasons,
+  TrackingEventDetails,
 } from "@openfeature/server-sdk";
 import type SplitIO from "@splitsoftware/splitio/types/splitio";
 
@@ -53,16 +54,17 @@ export class OpenFeatureSplitProvider implements Provider {
       flagKey,
       this.transformContext(context)
     );
+    const treatment = details.value.toLowerCase();
 
-    if ( details.value === "on" || details.value === "true" ) {
+    if ( treatment === "on" || treatment === "true" ) {
       return { ...details, value: true };
     }
 
-    if ( details.value === "off" || details.value === "false" ) {
+    if ( treatment === "off" || treatment === "false" ) {
       return { ...details, value: false };
     }
 
-    throw new ParseError(`Invalid boolean value for ${details.value}`);
+    throw new ParseError(`Invalid boolean value for ${treatment}`);
   }
 
   async resolveStringEvaluation(
@@ -119,7 +121,7 @@ export class OpenFeatureSplitProvider implements Provider {
       if (value === CONTROL_TREATMENT) {
         throw new FlagNotFoundError(CONTROL_VALUE_ERROR_MESSAGE);
       }
-      const flagMetadata = config ? JSON.parse(config) : undefined;
+      const flagMetadata = { config: config ? config : '' };
       const details: ResolutionDetails<string> = {
         value: value,
         variant: value,
@@ -130,6 +132,44 @@ export class OpenFeatureSplitProvider implements Provider {
     }
   }
 
+  async track(
+    trackingEventName: string,
+    context: EvaluationContext,
+    details: TrackingEventDetails
+  ): Promise<void> {
+
+    // targetingKey is always required
+    const { targetingKey } = context;
+    if (targetingKey == null || targetingKey === "")
+      throw new TargetingKeyMissingError();
+
+    // eventName is always required
+    if (trackingEventName == null || trackingEventName === "")
+      throw new ParseError("Missing eventName, required to track");
+
+    // trafficType is always required
+    const ttVal = context["trafficType"];
+    const trafficType =
+      ttVal != null && typeof ttVal === "string" && ttVal.trim() !== ""
+        ? ttVal
+        : null;
+    if (trafficType == null || trafficType === "")
+      throw new ParseError("Missing trafficType variable, required to track");
+
+    let value;
+    let properties: SplitIO.Properties = {};
+    if (details != null) {
+      if (details.value != null) {
+        value = details.value;
+      }
+      if (details.properties != null) {
+        properties = details.properties as SplitIO.Properties;
+      }
+    } 
+
+    this.client.track(targetingKey, trafficType, trackingEventName, value, properties);
+  }
+
   //Transform the context into an object useful for the Split API, an key string with arbitrary Split "Attributes".
   private transformContext(context: EvaluationContext): Consumer {
     const { targetingKey, ...attributes } = context;