feat(core): add test cases for the build schema

add test cases for the build schema

gh-86

Author: Sunny Tyagi

packages/core/src/__tests__/unit/build-schema.unit.ts

@@ -0,0 +1,57 @@
+import { MetadataInspector } from '@loopback/context';
+import { getModelSchemaRef, JsonSchemaOptions } from '@loopback/openapi-v3';
+import { expect } from '@loopback/testlab';
+import {
+    getModelSchemaRefSF,
+    OVERRIDE_MODEL_SCHEMA_KEY,
+} from '../../build-schema'; // adjust the path accordingly
+
+describe('getModelSchemaRefSF', () => {
+  class SampleModel {
+    name: string;
+    age: number;
+  }
+
+  afterEach(() => {
+    // Clear metadata between tests
+    MetadataInspector.defineMetadata(
+      OVERRIDE_MODEL_SCHEMA_KEY,
+      undefined,
+      SampleModel,
+    );
+  });
+
+  it('returns schema ref using the original model when no override metadata is present', () => {
+    const schema = getModelSchemaRefSF(SampleModel);
+    const expectedSchema = getModelSchemaRef(SampleModel);
+    expect(schema).to.deepEqual(expectedSchema);
+  });
+
+  it('returns schema ref using the overridden model when metadata is set', () => {
+    class OverriddenModel {
+      title: string;
+    }
+
+    // Set override metadata
+    MetadataInspector.defineMetadata(
+      OVERRIDE_MODEL_SCHEMA_KEY,
+      OverriddenModel,
+      SampleModel,
+    );
+
+    const schema = getModelSchemaRefSF(SampleModel);
+    const expectedSchema = getModelSchemaRef(OverriddenModel);
+    expect(schema).to.deepEqual(expectedSchema);
+  });
+
+  it('respects json schema options passed to the function', () => {
+    const options: JsonSchemaOptions<SampleModel> = {
+      title: 'CustomTitle',
+      optional: ['age'],
+    };
+
+    const schema = getModelSchemaRefSF(SampleModel, options);
+    const expectedSchema = getModelSchemaRef(SampleModel, options);
+    expect(schema).to.deepEqual(expectedSchema);
+  });
+});