diff --git a/src/generators/clean-arch.generator.ts b/src/generators/clean-arch.generator.ts
index c6d1d17..aa71354 100644
--- a/src/generators/clean-arch.generator.ts
+++ b/src/generators/clean-arch.generator.ts
@@ -74,7 +74,8 @@ export function generateCleanArchitecture(
     mappers: 0,
     useCases: 0,
     providers: 0,
-    mocks: 0
+    mocks: 0,
+    specs: 0
   };
 
   const schemas =
@@ -210,6 +211,26 @@ export function generateCleanArchitecture(
       generatedCount,
       'mocks'
     );
+
+    // Model spec
+    renderTemplate(
+      templatesDir,
+      'model-entity.spec.mustache',
+      modelViewData,
+      path.join(outputDir, 'entities/models', `${toCamelCase(baseName)}.model.spec.ts`),
+      generatedCount,
+      'specs'
+    );
+
+    // Mapper spec
+    renderTemplate(
+      templatesDir,
+      'mapper.spec.mustache',
+      mapperViewData,
+      path.join(outputDir, 'data/mappers', `${toCamelCase(baseName)}.mapper.spec.ts`),
+      generatedCount,
+      'specs'
+    );
   });
 
   // 2. Generate Use Cases and Repositories from Paths/Tags
@@ -227,7 +248,8 @@ export function generateCleanArchitecture(
           paramName: p.name,
           dataType: mapSwaggerTypeToTs(p.schema?.type || ''),
           description: p.description || '',
-          required: p.required
+          required: p.required,
+          testValue: resolveTestParamValue(mapSwaggerTypeToTs(p.schema?.type || ''))
         }));
 
         if (op.requestBody) {
@@ -241,7 +263,8 @@ export function generateCleanArchitecture(
             paramName: 'body',
             dataType: bodyType,
             description: op.requestBody.description || '',
-            required: true
+            required: true,
+            testValue: resolveTestParamValue(bodyType)
           });
         }
 
@@ -265,6 +288,7 @@ export function generateCleanArchitecture(
           summary: op.summary || '',
           notes: op.description || '',
           httpMethod: method.toLowerCase(),
+          uppercaseHttpMethod: method.toUpperCase(),
           path: pathKey,
           allParams: allParams.map((p, i: number) => ({
             ...p,
@@ -438,10 +462,30 @@ export function generateCleanArchitecture(
       generatedCount,
       'mocks'
     );
+
+    // Repository impl spec
+    renderTemplate(
+      templatesDir,
+      'api.repository.impl.spec.mustache',
+      apiViewData,
+      path.join(outputDir, 'data/repositories', `${toCamelCase(tag)}.repository.impl.spec.ts`),
+      generatedCount,
+      'specs'
+    );
+
+    // Use-cases impl spec
+    renderTemplate(
+      templatesDir,
+      'api.use-cases.impl.spec.mustache',
+      apiViewData,
+      path.join(outputDir, 'domain/use-cases', `${toCamelCase(tag)}.use-cases.impl.spec.ts`),
+      generatedCount,
+      'specs'
+    );
   });
 
   logSuccess(
-    `${generatedCount.models} Models, ${generatedCount.repositories} Repos, ${generatedCount.useCases} Use Cases, ${generatedCount.mappers} Mappers, ${generatedCount.providers} Providers, ${generatedCount.mocks} Mocks generated`
+    `${generatedCount.models} Models, ${generatedCount.repositories} Repos, ${generatedCount.useCases} Use Cases, ${generatedCount.mappers} Mappers, ${generatedCount.providers} Providers, ${generatedCount.mocks} Mocks, ${generatedCount.specs} Specs generated`
   );
   return generatedCount;
 }
@@ -463,3 +507,18 @@ function renderTemplate(
     counter[key]++;
   }
 }
+
+/** Resolves a simple test value literal for a given TypeScript type. */
+function resolveTestParamValue(dataType: string): string {
+  switch (dataType) {
+    case 'string':
+      return "'test'";
+    case 'number':
+      return '1';
+    case 'boolean':
+      return 'true';
+    default:
+      if (dataType.endsWith('[]')) return '[]';
+      return '{} as any';
+  }
+}
diff --git a/src/generators/report.generator.ts b/src/generators/report.generator.ts
index f8386f7..c127b25 100644
--- a/src/generators/report.generator.ts
+++ b/src/generators/report.generator.ts
@@ -12,6 +12,15 @@ function countMockFiles(dir: string): number {
   }
 }
 
+/** Counts files ending with `.spec.ts` in a directory (returns 0 if directory does not exist). */
+function countSpecFiles(dir: string): number {
+  try {
+    return fs.readdirSync(dir).filter((f) => f.endsWith('.spec.ts')).length;
+  } catch {
+    return 0;
+  }
+}
+
 /** Generates and persists the `generation-report.json` file with process statistics. */
 export function generateReport(outputDir: string, analysis: SwaggerAnalysis): GenerationReport {
   logStep('Generating report...');
@@ -35,7 +44,12 @@ export function generateReport(outputDir: string, analysis: SwaggerAnalysis): Ge
         countMockFiles(path.join(outputDir, 'di/repositories')) +
         countMockFiles(path.join(outputDir, 'di/use-cases')) +
         countMockFiles(path.join(outputDir, 'domain/use-cases')) +
-        countMockFiles(path.join(outputDir, 'entities/models'))
+        countMockFiles(path.join(outputDir, 'entities/models')),
+      specs:
+        countSpecFiles(path.join(outputDir, 'entities/models')) +
+        countSpecFiles(path.join(outputDir, 'data/mappers')) +
+        countSpecFiles(path.join(outputDir, 'data/repositories')) +
+        countSpecFiles(path.join(outputDir, 'domain/use-cases'))
     }
   };
 
diff --git a/src/types/generation.types.ts b/src/types/generation.types.ts
index 55f5368..22a3c87 100644
--- a/src/types/generation.types.ts
+++ b/src/types/generation.types.ts
@@ -8,6 +8,7 @@ export interface GeneratedCount {
   useCases: number;
   providers: number;
   mocks: number;
+  specs: number;
 }
 
 /**
@@ -25,5 +26,6 @@ export interface GenerationReport {
     useCases: number;
     providers: number;
     mocks: number;
+    specs: number;
   };
 }
diff --git a/src/types/openapi.types.ts b/src/types/openapi.types.ts
index 02498f2..1791429 100644
--- a/src/types/openapi.types.ts
+++ b/src/types/openapi.types.ts
@@ -96,6 +96,7 @@ export interface TagOperationParam {
   description: string;
   required: boolean;
   '-last': boolean;
+  testValue?: string;
 }
 
 /**
@@ -107,6 +108,7 @@ export interface TagOperation {
   summary: string;
   notes: string;
   httpMethod: string;
+  uppercaseHttpMethod: string;
   path: string;
   allParams: TagOperationParam[];
   hasQueryParams: boolean;
diff --git a/templates/api.repository.impl.spec.mustache b/templates/api.repository.impl.spec.mustache
new file mode 100644
index 0000000..7441c9d
--- /dev/null
+++ b/templates/api.repository.impl.spec.mustache
@@ -0,0 +1,97 @@
+{{#apiInfo}}
+{{#apis}}
+{{#operations}}
+import { HttpClientTestingModule, HttpTestingController } from '@angular/common/http/testing';
+import { TestBed } from '@angular/core/testing';
+
+import { {{classname}}RepositoryImpl } from './{{classFilename}}.repository.impl';
+{{#returnImports}}
+import { mock{{classname}}Dto } from '@/dtos/{{classFilename}}.dto.mock';
+import { mock{{classname}}Model } from '@/entities/models/{{classFilename}}.model.mock';
+{{/returnImports}}
+
+describe('{{classname}}RepositoryImpl', () => {
+  let repository: {{classname}}RepositoryImpl;
+  let httpMock: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [HttpClientTestingModule],
+      providers: [{{classname}}RepositoryImpl]
+    });
+
+    repository = TestBed.inject({{classname}}RepositoryImpl);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => {
+    httpMock.verify();
+  });
+
+  it('should be created', () => {
+    expect(repository).toBeTruthy();
+  });
+
+{{#operation}}
+  describe('{{nickname}}', () => {
+    it('should perform a {{uppercaseHttpMethod}} request', () => {
+      repository.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe();
+
+      const req = httpMock.expectOne((r) => r.method === '{{uppercaseHttpMethod}}');
+      expect(req.request.method).toBe('{{uppercaseHttpMethod}}');
+      {{#isListContainer}}
+      req.flush({ items: [mock{{returnBaseType}}Dto()] });
+      {{/isListContainer}}
+      {{^isListContainer}}
+      {{#returnType}}
+      req.flush(mock{{returnBaseType}}Dto());
+      {{/returnType}}
+      {{^returnType}}
+      req.flush(null);
+      {{/returnType}}
+      {{/isListContainer}}
+    });
+
+    {{#returnType}}
+    it('should map the response to the domain model', () => {
+      const dto = mock{{returnBaseType}}Dto();
+      const expectedModel = mock{{returnBaseType}}Model();
+
+      {{#isListContainer}}
+      repository.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe((result) => {
+        expect(result).toBeTruthy();
+        expect(result.length).toBeGreaterThan(0);
+      });
+
+      httpMock.expectOne((r) => r.method === '{{uppercaseHttpMethod}}').flush({ items: [dto] });
+      {{/isListContainer}}
+      {{^isListContainer}}
+      repository.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe((result) => {
+        expect(result).toEqual(expectedModel);
+      });
+
+      httpMock.expectOne((r) => r.method === '{{uppercaseHttpMethod}}').flush(dto);
+      {{/isListContainer}}
+    });
+
+    {{/returnType}}
+    it('should propagate HTTP errors', (done) => {
+      repository.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe({
+        error: (err) => {
+          expect(err.status).toBe(500);
+          done();
+        }
+      });
+
+      httpMock
+        .expectOne((r) => r.method === '{{uppercaseHttpMethod}}')
+        .flush('Internal Server Error', { status: 500, statusText: 'Internal Server Error' });
+    });
+  });
+
+{{/operation}}
+});
+
+{{/operations}}
+{{/apis}}
+{{/apiInfo}}
diff --git a/templates/api.use-cases.impl.spec.mustache b/templates/api.use-cases.impl.spec.mustache
new file mode 100644
index 0000000..2d80747
--- /dev/null
+++ b/templates/api.use-cases.impl.spec.mustache
@@ -0,0 +1,91 @@
+{{#apiInfo}}
+{{#apis}}
+{{#operations}}
+import { TestBed } from '@angular/core/testing';
+import { of } from 'rxjs';
+
+import { {{classname}}UseCasesImpl } from './{{classFilename}}.use-cases.impl';
+
+import { {{constantName}}_REPOSITORY, {{classname}}Repository } from '@/domain/repositories/{{classFilename}}.repository.contract';
+{{#returnImports}}
+import { mock{{classname}}Model } from '@/entities/models/{{classFilename}}.model.mock';
+{{/returnImports}}
+
+describe('{{classname}}UseCasesImpl', () => {
+  let useCase: {{classname}}UseCasesImpl;
+  let mockRepository: jasmine.SpyObj<{{classname}}Repository>;
+
+  beforeEach(() => {
+    mockRepository = jasmine.createSpyObj('{{classname}}Repository', [{{#operation}}'{{nickname}}', {{/operation}}]);
+
+    TestBed.configureTestingModule({
+      providers: [
+        {{classname}}UseCasesImpl,
+        { provide: {{constantName}}_REPOSITORY, useValue: mockRepository }
+      ]
+    });
+
+    useCase = TestBed.inject({{classname}}UseCasesImpl);
+  });
+
+  it('should be created', () => {
+    expect(useCase).toBeTruthy();
+  });
+
+{{#operation}}
+  describe('{{nickname}}', () => {
+    it('should delegate to the repository', () => {
+      {{#isListContainer}}
+      mockRepository.{{nickname}}.and.returnValue(of([mock{{returnBaseType}}Model()]));
+      {{/isListContainer}}
+      {{^isListContainer}}
+      {{#returnBaseType}}
+      mockRepository.{{nickname}}.and.returnValue(of(mock{{returnBaseType}}Model()));
+      {{/returnBaseType}}
+      {{^returnBaseType}}
+      mockRepository.{{nickname}}.and.returnValue(of(undefined));
+      {{/returnBaseType}}
+      {{/isListContainer}}
+
+      useCase.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}});
+
+      expect(mockRepository.{{nickname}}).toHaveBeenCalled();
+    });
+
+    it('should return the observable from the repository', (done) => {
+      {{#isListContainer}}
+      const expected = [mock{{returnBaseType}}Model()];
+      mockRepository.{{nickname}}.and.returnValue(of(expected));
+
+      useCase.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe((result) => {
+        expect(result).toEqual(expected);
+        done();
+      });
+      {{/isListContainer}}
+      {{^isListContainer}}
+      {{#returnBaseType}}
+      const expected = mock{{returnBaseType}}Model();
+      mockRepository.{{nickname}}.and.returnValue(of(expected));
+
+      useCase.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe((result) => {
+        expect(result).toEqual(expected);
+        done();
+      });
+      {{/returnBaseType}}
+      {{^returnBaseType}}
+      mockRepository.{{nickname}}.and.returnValue(of(undefined));
+
+      useCase.{{nickname}}({{#allParams}}{{{testValue}}}{{^-last}}, {{/-last}}{{/allParams}}).subscribe({
+        complete: () => done()
+      });
+      {{/returnBaseType}}
+      {{/isListContainer}}
+    });
+  });
+
+{{/operation}}
+});
+
+{{/operations}}
+{{/apis}}
+{{/apiInfo}}
diff --git a/templates/mapper.spec.mustache b/templates/mapper.spec.mustache
new file mode 100644
index 0000000..bfe3d69
--- /dev/null
+++ b/templates/mapper.spec.mustache
@@ -0,0 +1,39 @@
+{{#models}}
+{{#model}}
+import { {{classVarName}}Mapper } from './{{classFilename}}.mapper';
+
+import { mock{{classname}}Dto } from '@/dtos/{{classFilename}}.dto.mock';
+import { {{classname}} } from '@/entities/models/{{classFilename}}.model';
+
+describe('{{classVarName}}Mapper', () => {
+{{#vars}}
+  it('should map {{name}} from DTO to model', () => {
+    const dto = mock{{classname}}Dto();
+
+    const result = {{classVarName}}Mapper(dto);
+
+    expect(result.{{name}}).toBe(dto.{{name}});
+  });
+
+{{/vars}}
+  it('should return an instance of {{classname}}', () => {
+    const dto = mock{{classname}}Dto();
+
+    const result = {{classVarName}}Mapper(dto);
+
+    expect(result).toBeInstanceOf({{classname}});
+  });
+
+  it('should map all fields correctly from a complete DTO', () => {
+    const dto = mock{{classname}}Dto();
+
+    const result = {{classVarName}}Mapper(dto);
+
+{{#vars}}
+    expect(result.{{name}}).toBe(dto.{{name}});
+{{/vars}}
+  });
+});
+
+{{/model}}
+{{/models}}
diff --git a/templates/model-entity.spec.mustache b/templates/model-entity.spec.mustache
new file mode 100644
index 0000000..2dc0860
--- /dev/null
+++ b/templates/model-entity.spec.mustache
@@ -0,0 +1,34 @@
+{{#models}}
+{{#model}}
+import { {{classname}} } from './{{classFilename}}.model';
+import { mock{{classname}}Model } from './{{classFilename}}.model.mock';
+
+describe('{{classname}}', () => {
+  it('should create an instance', () => {
+    const model = new {{classname}}();
+
+    expect(model).toBeInstanceOf({{classname}});
+  });
+
+{{#vars}}
+  it('should allow setting {{name}}', () => {
+    const model = new {{classname}}();
+    const expected = mock{{classname}}Model();
+    model.{{name}} = expected.{{name}};
+
+    expect(model.{{name}}).toBe(expected.{{name}});
+  });
+
+{{/vars}}
+  it('should build a valid model from mock', () => {
+    const model = mock{{classname}}Model();
+
+    expect(model).toBeInstanceOf({{classname}});
+{{#vars}}
+    expect(model.{{name}}).toBeDefined();
+{{/vars}}
+  });
+});
+
+{{/model}}
+{{/models}}