From bf61af8a83394eb5e6450dd74eb9aa5dcb2ceafe Mon Sep 17 00:00:00 2001
From: Robert Sesek <rsesek@bluestatic.org>
Date: Mon, 17 Feb 2020 17:17:10 -0500
Subject: [PATCH] Begin defining a TaxReturn and Person model.

---
 src/Form.ts           |  2 ++
 src/Person.test.ts    | 15 +++++++++++++
 src/Person.ts         | 35 +++++++++++++++++++++++++++++
 src/TaxReturn.test.ts | 51 +++++++++++++++++++++++++++++++++++++++++++
 src/TaxReturn.ts      | 46 ++++++++++++++++++++++++++++++++++++++
 5 files changed, 149 insertions(+)
 create mode 100644 src/Form.ts
 create mode 100644 src/Person.test.ts
 create mode 100644 src/Person.ts
 create mode 100644 src/TaxReturn.test.ts
 create mode 100644 src/TaxReturn.ts

diff --git a/src/Form.ts b/src/Form.ts
new file mode 100644
index 0000000..1e2cb9a
--- /dev/null
+++ b/src/Form.ts
@@ -0,0 +1,2 @@
+export default class Form {
+};
diff --git a/src/Person.test.ts b/src/Person.test.ts
new file mode 100644
index 0000000..f6fa6e2
--- /dev/null
+++ b/src/Person.test.ts
@@ -0,0 +1,15 @@
+import { Person, Relation } from './Person';
+
+test('static constructors', () => {
+  let p = Person.self('Billy Bob');
+  expect(p.name).toBe('Billy Bob');
+  expect(p.relation).toBe(Relation.Self);
+
+  p = Person.spouse('Sponge Bob');
+  expect(p.name).toBe('Sponge Bob');
+  expect(p.relation).toBe(Relation.Spouse);
+
+  p = Person.dependent('Ted Bob');
+  expect(p.name).toBe('Ted Bob');
+  expect(p.relation).toBe(Relation.Dependent);
+});
diff --git a/src/Person.ts b/src/Person.ts
new file mode 100644
index 0000000..d376fc9
--- /dev/null
+++ b/src/Person.ts
@@ -0,0 +1,35 @@
+export enum Relation {
+  Self,
+  Spouse,
+  Dependent,
+};
+
+export class Person {
+  private _name: string;
+  private _relation: Relation;
+
+  constructor(name: string, relation: Relation) {
+    this._name = name;
+    this._relation = relation;
+  }
+
+  get name(): string {
+    return this._name;
+  }
+
+  get relation(): Relation {
+    return this._relation;
+  }
+
+  static self(name: string): Person {
+    return new Person(name, Relation.Self);
+  }
+
+  static spouse(name: string): Person {
+    return new Person(name, Relation.Spouse);
+  }
+
+  static dependent(name: string): Person {
+    return new Person(name, Relation.Dependent);
+  }
+};
diff --git a/src/TaxReturn.test.ts b/src/TaxReturn.test.ts
new file mode 100644
index 0000000..0c0aab6
--- /dev/null
+++ b/src/TaxReturn.test.ts
@@ -0,0 +1,51 @@
+import TaxReturn from './TaxReturn';
+import { Person } from './Person';
+
+test('constructor', () => {
+  const tr = new TaxReturn(2019);
+  expect(tr.year).toBe(2019);
+});
+
+test('does not support Dependents', () => {
+  const tr = new TaxReturn(2019);
+  const p = Person.dependent('Baby');
+  expect(() => tr.addPerson(p)).toThrow('Dependents are not supported');
+});
+
+test('add more than one Self', () => {
+  const tr = new TaxReturn(2019);
+  const p1 = Person.self('A');
+  tr.addPerson(p1);
+  const p2 = Person.self('B');
+  expect(() => tr.addPerson(p2)).toThrow('Cannot have more than one Self or Spouse');
+});
+
+test('add more than one Spouse', () => {
+  const tr = new TaxReturn(2019);
+  const p1 = Person.spouse('A');
+  tr.addPerson(p1);
+  const p2 = Person.spouse('B');
+  expect(() => tr.addPerson(p2)).toThrow('Cannot have more than one Self or Spouse');
+});
+
+test('add Self and Spouse', () => {
+  const tr = new TaxReturn(2019);
+  const self = Person.self('Billy Bob');
+  const spouse = Person.spouse('Jilly Bob');
+  tr.addPerson(self);
+  tr.addPerson(spouse);
+
+  expect(tr.getPerson('Billy')).toBe(self);
+  expect(tr.getPerson('Jilly')).toBe(spouse);
+
+  expect(() => tr.getPerson('Bob')).toThrow('too imprecise');
+});
+
+test('get non-existent person', () => {
+  const tr = new TaxReturn(2019);
+  const self = Person.self('Billy Bob');
+  tr.addPerson(self);
+
+  expect(tr.getPerson('Billy Bob')).toBe(self);
+  expect(() => tr.getPerson('Jilly')).toThrow('not found');
+});
diff --git a/src/TaxReturn.ts b/src/TaxReturn.ts
new file mode 100644
index 0000000..192a41e
--- /dev/null
+++ b/src/TaxReturn.ts
@@ -0,0 +1,46 @@
+import Form from './Form';
+import { Person, Relation } from './Person';
+
+export default class TaxReturn {
+  private _year: number;
+  private _people: Person[] = [];
+  private _forms: Form[] = [];
+
+  constructor(year: number) {
+    this._year = year;
+  }
+
+  get year(): number {
+    return this._year;
+  }
+
+  addPerson(person: Person) {
+    if (person.relation == Relation.Dependent) {
+      throw new UnsupportedFeatureError('Dependents are not supported');
+    }
+    if (person.relation == Relation.Self || person.relation == Relation.Spouse) {
+      const others = this._people.filter(p => p.relation == person.relation);
+      if (others.length > 0) {
+        throw new InconsistencyError('Cannot have more than one Self or Spouse');
+      }
+    }
+    this._people.push(person);
+  }
+
+  getPerson(name: RegExp | string): Person {
+    const people = this._people.filter(p => p.name.search(name) !== -1);
+    if (people.length != 1) {
+      throw new Error(`Person ${name} not found or too imprecise`);
+    }
+    return people[0];
+  }
+
+  addForm(form: Form) {
+  }
+};
+
+export class InconsistencyError extends Error {
+};
+
+export class UnsupportedFeatureError extends Error {
+};
-- 
2.22.5