diff --git a/projects/ngx-xapi/model/src/lib/about.spec.ts b/projects/ngx-xapi/model/src/lib/about.spec.ts
new file mode 100644
index 0000000..e298e8c
--- /dev/null
+++ b/projects/ngx-xapi/model/src/lib/about.spec.ts
@@ -0,0 +1,14 @@
+import { About } from './about';
+
+describe('About', () => {
+  it('should create an instance', () => {
+    const about: About = {
+      version: ['1.0.0', '1.0.1', '1.0.2', '1.0.3'],
+      extensions: {
+        'https://learning.dev/lrs': true,
+      },
+    };
+
+    expect(about).toBeTruthy();
+  });
+});
diff --git a/projects/ngx-xapi/model/src/lib/account.spec.ts b/projects/ngx-xapi/model/src/lib/account.spec.ts
new file mode 100644
index 0000000..29395eb
--- /dev/null
+++ b/projects/ngx-xapi/model/src/lib/account.spec.ts
@@ -0,0 +1,12 @@
+import { Account } from './account';
+
+describe('Account', () => {
+  it('should create an instance', () => {
+    const account: Account = {
+      homePage: 'http://example.com',
+      name: 'Example Account',
+    };
+
+    expect(account).toBeTruthy();
+  });
+});
diff --git a/projects/ngx-xapi/model/src/lib/activity.spec.ts b/projects/ngx-xapi/model/src/lib/activity.spec.ts
new file mode 100644
index 0000000..f282de9
--- /dev/null
+++ b/projects/ngx-xapi/model/src/lib/activity.spec.ts
@@ -0,0 +1,361 @@
+import {
+  Activity,
+  ActivityDefinition,
+  ChoiceInteractionActivityDefinition,
+  FillInInteractionActivityDefinition,
+  InteractionComponent,
+  LikertInteractionActivityDefinition,
+  LongFillInInteractionActivityDefinition,
+  MatchingInteractionActivityDefinition,
+  NumericInteractionActivityDefinition,
+  OtherInteractionActivityDefinition,
+  PerformanceInteractionActivityDefinition,
+  SequencingInteractionActivityDefinition,
+  TrueFalseInteractionActivityDefinition,
+} from './activity';
+
+describe('ActivityDefinition', () => {
+  it('should create an instance', () => {
+    const activityDefinition: ActivityDefinition = {
+      name: {
+        en: 'Example Activity',
+      },
+      description: {
+        en: 'Example Activity Description',
+      },
+      type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+      moreInfo: 'http://example.com',
+      interactionType: 'other',
+      correctResponsesPattern: ['Example Correct Response Pattern'],
+      choices: [
+        {
+          id: 'http://example.com/choices/example-choice',
+          description: {
+            en: 'Example Choice Description',
+          },
+        },
+      ],
+      scale: [
+        {
+          id: 'http://example.com/scales/example-scale',
+          description: {
+            en: 'Example Scale Description',
+          },
+        },
+      ],
+      source: [
+        {
+          id: 'http://example.com/sources/example-source',
+          description: {
+            en: 'Example Source Description',
+          },
+        },
+      ],
+      target: [
+        {
+          id: 'http://example.com/targets/example-target',
+          description: {
+            en: 'Example Target Description',
+          },
+        },
+      ],
+      steps: [
+        {
+          id: 'http://example.com/steps/example-step',
+          description: {
+            en: 'Example Step Description',
+          },
+        },
+      ],
+      extensions: {
+        'http://example.com/extensions/example-extension':
+          'Example Extension Value',
+      },
+    };
+
+    expect(activityDefinition).toBeTruthy();
+  });
+});
+
+describe('InteractionComponent', () => {
+  it('should create an instance', () => {
+    const interactionComponent: InteractionComponent = {
+      id: 'http://example.com/interaction-component',
+      description: {
+        en: 'Example Interaction Component Description',
+      },
+    };
+
+    expect(interactionComponent).toBeTruthy();
+  });
+});
+
+describe('TrueFalseInteractionActivityDefinition', () => {
+  it('should create an instance', () => {
+    const trueFalseInteractionActivityDefinition: TrueFalseInteractionActivityDefinition =
+      {
+        name: {
+          en: 'Example True/False Activity',
+        },
+        description: {
+          en: 'Example True/False Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        interactionType: 'true-false',
+        correctResponsesPattern: ['true'],
+      };
+
+    expect(trueFalseInteractionActivityDefinition).toBeTruthy();
+  });
+});
+
+describe('ChoiceInteractionActivityDefinition', () => {
+  it('should create an instance', () => {
+    const choiceInteractionActivityDefinition: ChoiceInteractionActivityDefinition =
+      {
+        name: {
+          en: 'Example Choice Activity',
+        },
+        description: {
+          en: 'Example Choice Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        interactionType: 'choice',
+        choices: [
+          {
+            id: 'http://example.com/choices/example-choice',
+            description: {
+              en: 'Example Choice Description',
+            },
+          },
+        ],
+      };
+
+    expect(choiceInteractionActivityDefinition).toBeTruthy();
+  });
+});
+
+describe('FillInInteractionActivityDefinition', () => {
+  it('should create an instance', () => {
+    const fillInInteractionActivityDefinition: FillInInteractionActivityDefinition =
+      {
+        name: {
+          en: 'Example Fill-In Activity',
+        },
+        description: {
+          en: 'Example Fill-In Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        interactionType: 'fill-in',
+        correctResponsesPattern: ['Example Correct Response Pattern'],
+      };
+
+    expect(fillInInteractionActivityDefinition).toBeTruthy();
+  });
+});
+
+describe('LongFillInInteractionActivityDefinition', () => {
+  it('should create an instance', () => {
+    const longFillInInteractionActivityDefinition: LongFillInInteractionActivityDefinition =
+      {
+        name: {
+          en: 'Example Long Fill-In Activity',
+        },
+        description: {
+          en: 'Example Long Fill-In Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        interactionType: 'long-fill-in',
+        correctResponsesPattern: ['Example Correct Response Pattern'],
+      };
+
+    expect(longFillInInteractionActivityDefinition).toBeTruthy();
+  });
+});
+
+describe('MatchingInteractionActivityDefinition', () => {
+  it('should create an instance', () => {
+    const matchingInteractionActivityDefinition: MatchingInteractionActivityDefinition =
+      {
+        name: {
+          en: 'Example Matching Activity',
+        },
+        description: {
+          en: 'Example Matching Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        interactionType: 'matching',
+        source: [
+          {
+            id: 'http://example.com/sources/example-source',
+            description: {
+              en: 'Example Source Description',
+            },
+          },
+        ],
+        target: [
+          {
+            id: 'http://example.com/targets/example-target',
+            description: {
+              en: 'Example Target Description',
+            },
+          },
+        ],
+      };
+
+    expect(matchingInteractionActivityDefinition).toBeTruthy();
+  });
+});
+
+describe('PerformanceInteractionActivityDefinition', () => {
+  it('should create an instance', () => {
+    const performanceInteractionActivityDefinition: PerformanceInteractionActivityDefinition =
+      {
+        name: {
+          en: 'Example Performance Activity',
+        },
+        description: {
+          en: 'Example Performance Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        interactionType: 'performance',
+        steps: [
+          {
+            id: 'http://example.com/steps/example-step',
+            description: {
+              en: 'Example Step Description',
+            },
+          },
+        ],
+      };
+
+    expect(performanceInteractionActivityDefinition).toBeTruthy();
+  });
+});
+
+describe('SequencingInteractionActivityDefinition', () => {
+  it('should create an instance', () => {
+    const sequencingInteractionActivityDefinition: SequencingInteractionActivityDefinition =
+      {
+        name: {
+          en: 'Example Sequencing Activity',
+        },
+        description: {
+          en: 'Example Sequencing Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        interactionType: 'sequencing',
+        correctResponsesPattern: ['Example Correct Response Pattern'],
+        choices: [
+          {
+            id: 'http://example.com/choices/example-choice1',
+            description: {
+              en: 'Example Choice Description 1',
+            },
+          },
+          {
+            id: 'http://example.com/choices/example-choice2',
+            description: {
+              en: 'Example Choice Description 2',
+            },
+          },
+        ],
+      };
+
+    expect(sequencingInteractionActivityDefinition).toBeTruthy();
+  });
+});
+
+describe('LikertInteractionActivityDefinition', () => {
+  it('should create an instance', () => {
+    const likertInteractionActivityDefinition: LikertInteractionActivityDefinition =
+      {
+        name: {
+          en: 'Example Likert Activity',
+        },
+        description: {
+          en: 'Example Likert Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        interactionType: 'likert',
+        scale: [
+          {
+            id: 'http://example.com/scales/example-scale',
+            description: {
+              en: 'Example Scale Description',
+            },
+          },
+        ],
+      };
+
+    expect(likertInteractionActivityDefinition).toBeTruthy();
+  });
+});
+
+describe('NumericInteractionActivityDefinition', () => {
+  it('should create an instance', () => {
+    const numericInteractionActivityDefinition: NumericInteractionActivityDefinition =
+      {
+        name: {
+          en: 'Example Numeric Activity',
+        },
+        description: {
+          en: 'Example Numeric Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        correctResponsesPattern: ['Example Correct Response Pattern'],
+        interactionType: 'numeric',
+      };
+
+    expect(numericInteractionActivityDefinition).toBeTruthy();
+  });
+});
+
+describe('OtherInteractionActivityDefinition', () => {
+  it('should create an instance', () => {
+    const otherInteractionActivityDefinition: OtherInteractionActivityDefinition =
+      {
+        name: {
+          en: 'Example Other Activity',
+        },
+        description: {
+          en: 'Example Other Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        interactionType: 'other',
+      };
+
+    expect(otherInteractionActivityDefinition).toBeTruthy();
+  });
+});
+
+describe('Activity', () => {
+  it('should create an instance', () => {
+    const activity: Activity = {
+      id: 'http://example.com/activities/example-activity',
+      definition: {
+        name: {
+          en: 'Example Activity',
+        },
+        description: {
+          en: 'Example Activity Description',
+        },
+        type: 'http://adlnet.gov/expapi/activities/cmi.interaction',
+        moreInfo: 'http://example.com',
+        interactionType: 'other',
+      },
+    };
+
+    expect(activity).toBeTruthy();
+  });
+});
diff --git a/projects/ngx-xapi/model/src/lib/actor.spec.ts b/projects/ngx-xapi/model/src/lib/actor.spec.ts
new file mode 100644
index 0000000..78bf697
--- /dev/null
+++ b/projects/ngx-xapi/model/src/lib/actor.spec.ts
@@ -0,0 +1,155 @@
+import { Agent, AnonymousGroup, IdentifiedGroup } from './actor';
+
+describe('Agent', () => {
+  it('should create an instance with mbox', () => {
+    const agent: Agent = {
+      mbox: 'mailto:agent@example.com',
+      name: 'Example Agent',
+    };
+
+    expect(agent).toBeTruthy();
+  });
+
+  it('should create an instance with mbox_sha1sum', () => {
+    const agent: Agent = {
+      name: 'Example Agent',
+      mbox_sha1sum: 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa',
+    };
+
+    expect(agent).toBeTruthy();
+  });
+
+  it('should create an instance with openid', () => {
+    const agent: Agent = {
+      name: 'Example Agent',
+      openid: 'https://example.com',
+    };
+
+    expect(agent).toBeTruthy();
+  });
+
+  it('should create an instance with account', () => {
+    const agent: Agent = {
+      name: 'Example Agent',
+      account: {
+        homePage: 'http://example.com',
+        name: 'Example Account',
+      },
+    };
+
+    expect(agent).toBeTruthy();
+  });
+});
+
+describe('AnonymousGroup', () => {
+  it('should create an instance with member', () => {
+    const anonymousGroup: AnonymousGroup = {
+      member: [
+        {
+          mbox: 'mailto:member1@example.com',
+          name: 'Member 1',
+        },
+        {
+          mbox: 'mailto:member2@example.com',
+          name: 'Member 2',
+        },
+      ],
+
+      objectType: 'Group',
+      name: 'Example Group',
+    };
+
+    expect(anonymousGroup).toBeTruthy();
+  });
+});
+
+describe('IdentifiedGroup', () => {
+  it('should create an instance with member', () => {
+    const identifiedGroup: IdentifiedGroup = {
+      member: [
+        {
+          mbox: 'mailto:member1@example.com',
+          name: 'Member 1',
+        },
+        {
+          mbox: 'mailto:member2@example.com',
+          name: 'Member 2',
+        },
+      ],
+
+      objectType: 'Group',
+      name: 'Example Group',
+      account: {
+        homePage: 'http://example.com',
+        name: 'Example Group Account',
+      },
+    };
+
+    expect(identifiedGroup).toBeTruthy();
+  });
+
+  it('should create an instance without member', () => {
+    const identifiedGroup: IdentifiedGroup = {
+      objectType: 'Group',
+      name: 'Example Group',
+      openid: 'https://example.com/group',
+    };
+
+    expect(identifiedGroup).toBeTruthy();
+  });
+});
+
+describe('Actor', () => {
+  it('should create an instance as Agent', () => {
+    const actor: Agent = {
+      mbox: 'mailto:agent@example.com',
+      name: 'Example Agent',
+    };
+
+    expect(actor).toBeTruthy();
+  });
+
+  it('should create an instance as AnonymousGroup', () => {
+    const actor: AnonymousGroup = {
+      member: [
+        {
+          mbox: 'mailto:member1@example.com',
+          name: 'Member 1',
+        },
+        {
+          mbox: 'mailto:member2@example.com',
+          name: 'Member 2',
+        },
+      ],
+
+      objectType: 'Group',
+      name: 'Example Group',
+    };
+
+    expect(actor).toBeTruthy();
+  });
+
+  it('should create an instance as IdentifiedGroup', () => {
+    const actor: IdentifiedGroup = {
+      member: [
+        {
+          openid: 'https://example.com/member1',
+          name: 'Member 1',
+        },
+        {
+          openid: 'https://example.com/member2',
+          name: 'Member 2',
+        },
+      ],
+
+      objectType: 'Group',
+      name: 'Example Group',
+      account: {
+        homePage: 'http://example.com',
+        name: 'Example Group Account',
+      },
+    };
+
+    expect(actor).toBeTruthy();
+  });
+});
diff --git a/projects/ngx-xapi/model/src/lib/attachment.spec.ts b/projects/ngx-xapi/model/src/lib/attachment.spec.ts
new file mode 100644
index 0000000..786537b
--- /dev/null
+++ b/projects/ngx-xapi/model/src/lib/attachment.spec.ts
@@ -0,0 +1,17 @@
+import { Attachment } from './attachment';
+
+describe('Attachment', () => {
+  it('should create an instance', () => {
+    const attachment: Attachment = {
+      usageType: 'http://adlnet.gov/expapi/attachments/signature',
+      display: {
+        en: 'Signature',
+      },
+      contentType: 'application/octet-stream',
+      length: 0,
+      sha2: '1234567890abcdef',
+    };
+
+    expect(attachment).toBeTruthy();
+  });
+});
diff --git a/projects/ngx-xapi/model/src/lib/person.spec.ts b/projects/ngx-xapi/model/src/lib/person.spec.ts
new file mode 100644
index 0000000..dd9056d
--- /dev/null
+++ b/projects/ngx-xapi/model/src/lib/person.spec.ts
@@ -0,0 +1,28 @@
+import { Person } from './person';
+
+describe('Person', () => {
+  it('should create an instance', () => {
+    const person: Person = {
+      name: ['Example Person', 'Alias Person'],
+      mbox: ['mailto:person@example.com', 'mailto:alias@example.com'],
+      account: [
+        {
+          homePage: 'http://example.com',
+          name: 'Example Person Account',
+        },
+        {
+          homePage: 'http://example.com',
+          name: 'Alias Person Account',
+        },
+      ],
+      openid: ['https://example.com/person', 'https://example.com/alias'],
+      mbox_sha1sum: [
+        'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa',
+        'bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb',
+      ],
+      objectType: 'Person',
+    };
+
+    expect(person).toBeTruthy();
+  });
+});
diff --git a/projects/ngx-xapi/model/src/lib/result.spec.ts b/projects/ngx-xapi/model/src/lib/result.spec.ts
new file mode 100644
index 0000000..b3b1704
--- /dev/null
+++ b/projects/ngx-xapi/model/src/lib/result.spec.ts
@@ -0,0 +1,23 @@
+import { Result } from './result';
+
+describe('Result', () => {
+  it('should create an instance', () => {
+    const result: Result = {
+      score: {
+        scaled: 0.5,
+        raw: 50,
+        min: 0,
+        max: 100,
+      },
+      success: true,
+      completion: true,
+      response: 'Example Response',
+      duration: 'PT1H',
+      extensions: {
+        'https://learning.dev/lrs': true,
+      },
+    };
+
+    expect(result).toBeTruthy();
+  });
+});
diff --git a/projects/ngx-xapi/model/src/lib/statement.spec.ts b/projects/ngx-xapi/model/src/lib/statement.spec.ts
new file mode 100644
index 0000000..3f36672
--- /dev/null
+++ b/projects/ngx-xapi/model/src/lib/statement.spec.ts
@@ -0,0 +1,67 @@
+import { Statement } from './statement';
+
+describe('Statement', () => {
+  it('should create an instance', () => {
+    const statement: Statement = {
+      id: '45e6dec1-789c-40ff-8f9b-a9428b33230d',
+      actor: {
+        mbox: 'mailto:sss@example.com',
+        name: 'Example Actor',
+        objectType: 'Agent',
+      },
+      verb: {
+        id: 'http://adlnet.gov/expapi/verbs/experienced',
+        display: {
+          en: 'experienced',
+        },
+      },
+      object: {
+        id: 'http://example.com/activities/example-activity',
+      },
+      result: {
+        completion: true,
+        success: true,
+        score: {
+          scaled: 0.95,
+          raw: 95,
+          min: 0,
+          max: 100,
+        },
+      },
+      context: {
+        registration: 'ec531277-b57b-4c15-8d91-d292c5b2b8f7',
+        contextActivities: {
+          parent: [
+            {
+              id: 'http://example.com/activities/example-activity',
+            },
+          ],
+        },
+      },
+      authority: {
+        mbox: 'mailto:bob@example.com',
+        name: 'Bob',
+        objectType: 'Agent',
+      },
+      version: '1.0.0',
+      timestamp: '2021-01-01T00:00:00.000Z',
+      stored: '2021-01-01T00:00:00.000Z',
+      attachments: [
+        {
+          usageType: 'http://example.com/attachment-usage/example-usage',
+          display: {
+            en: 'Example Attachment',
+          },
+          description: {
+            en: 'Example Attachment Description',
+          },
+          contentType: 'text/plain',
+          length: 0,
+          sha2: 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa',
+        },
+      ],
+    };
+
+    expect(statement).toBeTruthy();
+  });
+});
diff --git a/projects/ngx-xapi/model/src/lib/verb.spec.ts b/projects/ngx-xapi/model/src/lib/verb.spec.ts
new file mode 100644
index 0000000..6878a5d
--- /dev/null
+++ b/projects/ngx-xapi/model/src/lib/verb.spec.ts
@@ -0,0 +1,14 @@
+import { Verb } from './verb';
+
+describe('Verb', () => {
+  it('should create an instance', () => {
+    const verb: Verb = {
+      id: 'http://adlnet.gov/expapi/verbs/answered',
+      display: {
+        en: 'answered',
+      },
+    };
+
+    expect(verb).toBeTruthy();
+  });
+});