test: Implement UsageData model tests

packages/backend/src/models/__snapshots__/usage-data.ee.test.js.snap

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+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`UsageData model > jsonSchema should have correct validations 1`] = `
+{
+  "properties": {
+    "consumedTaskCount": {
+      "type": "integer",
+    },
+    "createdAt": {
+      "type": "string",
+    },
+    "deletedAt": {
+      "type": "string",
+    },
+    "id": {
+      "format": "uuid",
+      "type": "string",
+    },
+    "nextResetAt": {
+      "type": "string",
+    },
+    "subscriptionId": {
+      "format": "uuid",
+      "type": "string",
+    },
+    "updatedAt": {
+      "type": "string",
+    },
+    "userId": {
+      "format": "uuid",
+      "type": "string",
+    },
+  },
+  "required": [
+    "userId",
+    "consumedTaskCount",
+    "nextResetAt",
+  ],
+  "type": "object",
+}
+`;

packages/backend/src/models/usage-data.ee.test.js

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+import { describe, it, expect } from 'vitest';
+import UsageData from './usage-data.ee';
+import User from './user';
+import Subscription from './subscription.ee';
+import Base from './base';
+import { createUsageData } from '../../test/factories/usage-data';
+
+describe('UsageData model', () => {
+  it('tableName should return correct name', () => {
+    expect(UsageData.tableName).toBe('usage_data');
+  });
+
+  it('jsonSchema should have correct validations', () => {
+    expect(UsageData.jsonSchema).toMatchSnapshot();
+  });
+
+  it('relationMappings should return correct associations', () => {
+    const relationMappings = UsageData.relationMappings();
+
+    const expectedRelations = {
+      user: {
+        relation: Base.BelongsToOneRelation,
+        modelClass: User,
+        join: {
+          from: 'usage_data.user_id',
+          to: 'users.id',
+        },
+      },
+      subscription: {
+        relation: Base.BelongsToOneRelation,
+        modelClass: Subscription,
+        join: {
+          from: 'usage_data.subscription_id',
+          to: 'subscriptions.id',
+        },
+      },
+    };
+
+    expect(relationMappings).toStrictEqual(expectedRelations);
+  });
+
+  it('increaseConsumedTaskCountByOne should increase consumed task count by one', async () => {
+    const usageData = await createUsageData({
+      consumedTaskCount: 1234,
+    });
+
+    await usageData.increaseConsumedTaskCountByOne();
+    const refetchedUsageData = await usageData.$query();
+
+    expect(refetchedUsageData.consumedTaskCount).toStrictEqual(1235);
+  });
+});