Refactor to use version object #59

Enable writing safer version aware logic.

tests/unit/domain/Version.spec.ts

@@ -0,0 +1,115 @@
+import 'mocha';
+import { expect } from 'chai';
+import { Version } from '@/domain/Version';
+
+describe('Version', () => {
+  describe('invalid versions', () => {
+    describe('throws with invalid semantic version', () => {
+      // arrange
+      const invalidVersions = [
+        '0.1.0.0', '0.1', '0.1..0', '0..1.0', '0..1', '...', '0.10', '0.-5.4',
+      ];
+      for (const version of invalidVersions) {
+        const expectedError = `invalid version: ${version}`;
+        it(`given ${version}`, () => {
+          // act
+          const act = () => new Version(version);
+          //
+          expect(act).to.throw(expectedError);
+        });
+      }
+    });
+    describe('throws with empty string', () => {
+      // arrange
+      const expectedError = 'empty version';
+      const testCases = [
+        { name: 'empty', value: '' },
+        { name: 'undefined', value: undefined },
+      ];
+      for (const testCase of testCases) {
+        it(`given ${testCase.name}`, () => {
+          // act
+          const act = () => new Version(testCase.value);
+          //
+          expect(act).to.throw(expectedError);
+        });
+      }
+    });
+  });
+  describe('valid versions', () => {
+    const validVersions: Array<ValidVersionTestData> = [
+      {
+        text: '0.1.0',
+        parts: { major: 0, minor: 1, patch: 0 },
+      },
+      {
+        text: '3.0.0',
+        parts: { major: 3, minor: 0, patch: 0 },
+      },
+      {
+        text: '100.1000.10000',
+        parts: { major: 100, minor: 1000, patch: 10000 },
+      },
+    ];
+    function testValidVersions(tester: (data: ValidVersionTestData) => void) {
+      for (const version of validVersions) {
+        it(`given ${version.text}`, () => {
+          tester(version);
+        });
+      }
+    }
+    describe('major', () => {
+      testValidVersions((version) => {
+        // arrange
+        const expected = version.parts.major;
+        // act
+        const sut = new Version(version.text);
+        const actual = sut.major;
+        // assert
+        expect(expected).to.equal(actual);
+      });
+    });
+    describe('minor', () => {
+      testValidVersions((version) => {
+        // arrange
+        const expected = version.parts.minor;
+        // act
+        const sut = new Version(version.text);
+        const actual = sut.minor;
+        // assert
+        expect(expected).to.equal(actual);
+      });
+    });
+    describe('patch', () => {
+      testValidVersions((version) => {
+        // arrange
+        const expected = version.parts.patch;
+        // act
+        const sut = new Version(version.text);
+        const actual = sut.patch;
+        // assert
+        expect(expected).to.equal(actual);
+      });
+    });
+    describe('toString', () => {
+      testValidVersions((version) => {
+        // arrange
+        const expected = version.text;
+        // act
+        const sut = new Version(expected);
+        const actual = sut.toString();
+        // assert
+        expect(expected).to.equal(actual);
+      });
+    });
+  });
+});
+
+interface ValidVersionTestData {
+  text: string;
+  parts: {
+    major: number,
+    minor: number,
+    patch: number,
+  },
+}