feat: Add tests for config feature (#1407)

Signed-off-by: Marko Mlakar <[email protected]>

Author: MarkoMlakar

libs/providers/flagd/src/e2e/constants.ts

@@ -4,3 +4,4 @@ export const UNSTABLE_CLIENT_NAME = 'unstable';
 export const UNAVAILABLE_CLIENT_NAME = 'unavailable';
 
 export const GHERKIN_FLAGD = getGherkinTestPath('*.feature');
+export const CONFIG_FEATURE = getGherkinTestPath('config.feature');

libs/providers/flagd/src/e2e/step-definitions/configSteps.ts

@@ -13,10 +13,19 @@ export const configSteps: Steps = (state: State) => {
     }
   }
 
+  const originalEnv = { ...process.env };
+
   return ({ given, when, then }: StepsDefinitionCallbackOptions) => {
     beforeEach(() => {
       state.options = {};
+      state.config = undefined;
+      state.events = [];
+      Object.keys(process.env)
+        .filter((key) => !Object.prototype.hasOwnProperty.call(originalEnv, key))
+        .forEach((key) => delete process.env[key]);
+      Object.assign(process.env, originalEnv);
     });
+
     given(/^an option "(.*)" of type "(.*)" with value "(.*)"$/, (name: string, type: string, value: string) => {
       state.options[mapName(name)] = mapValueToType(value, type);
     });

libs/providers/flagd/src/lib/configuration.spec.ts

@@ -2,6 +2,10 @@ import type { Config, FlagdProviderOptions } from './configuration';
 import { getConfig } from './configuration';
 import { DEFAULT_MAX_CACHE_SIZE } from './constants';
 import type { EvaluationContext } from '@openfeature/server-sdk';
+import { configSteps } from '../e2e/step-definitions/configSteps';
+import type { State } from '../e2e/step-definitions/state';
+import { autoBindSteps, loadFeatures } from 'jest-cucumber';
+import { CONFIG_FEATURE } from '../e2e';
 
 describe('Configuration', () => {
   const OLD_ENV = process.env;
@@ -163,4 +167,23 @@ describe('Configuration', () => {
       });
     });
   });
+
+  describe('config.feature', () => {
+    const state: State = {
+      resolverType: 'in-process',
+      options: {},
+      config: undefined,
+      events: [],
+    };
+
+    autoBindSteps(
+      loadFeatures(CONFIG_FEATURE, {
+        scenarioNameTemplate: (vars) => {
+          const tags = [...new Set([...vars.scenarioTags, ...vars.featureTags])];
+          return `${vars.scenarioTitle}${tags.length > 0 ? ` (${tags.join(', ')})` : ''}`;
+        },
+      }),
+      [configSteps(state)],
+    );
+  });
 });