feat: added SemVer support and fixed #273

__tests__/main.test.ts

@@ -9,8 +9,15 @@ describe('installer', () => {
     })
   }, 100000)
 
-  test('acquires a version of Octopus CLI', () => {
-    return installOctopusCli('7.4.3124').then(data => {
+  test('fails to acquire a version of Octopus CLI', () => {
+    expect.assertions(1)
+    return installOctopusCli('0.0.0').catch(e => {
+      expect(<Error>e.message).toContain('Octopus CLI version not found')
+    })
+  }, 100000)
+
+  test('acquires version 8.* of Octopus CLI', () => {
+    return installOctopusCli('8.*').then(data => {
       expect(data).toContain(path.sep + 'octo' + path.sep)
     })
   }, 100000)

__tests__/octopusCLIVersionFetcher.test.ts

@@ -0,0 +1,88 @@
+import {OctopusCLIVersionFetcher} from '../src/octopusCLIVersionFetcher'
+
+describe('OctopusCLIVersionFetcher tests', () => {
+  test('Gets latest', () => {
+    const fetcher = new OctopusCLIVersionFetcher(['1.0.0', '2.0.0', '2.1.0'])
+
+    const version = fetcher.getVersion('*')
+
+    expect(version).toBe('2.1.0')
+  })
+
+  test('Fixed returns fixed version', () => {
+    const fetcher = new OctopusCLIVersionFetcher(['1.0.0', '2.0.0', '2.1.0'])
+
+    const version = fetcher.getVersion('1.0.0')
+
+    expect(version).toBe('1.0.0')
+  })
+
+  test('When version no exists', () => {
+    const fetcher = new OctopusCLIVersionFetcher(['1.0.0', '2.0.0', '2.1.0'])
+
+    expect(() => fetcher.getVersion('5.0.0')).toThrow()
+  })
+
+  test('Get latest minor', () => {
+    const fetcher = new OctopusCLIVersionFetcher([
+      '1.0.0',
+      '2.0.0',
+      '2.1.0',
+      '3.0.0'
+    ])
+
+    const version = fetcher.getVersion('2.*')
+
+    expect(version).toBe('2.1.0')
+  })
+
+  test('Get latest patch', () => {
+    const fetcher = new OctopusCLIVersionFetcher([
+      '1.0.0',
+      '1.0.3',
+      '2.1.0',
+      '3.0.0'
+    ])
+
+    const version = fetcher.getVersion('1.0.*')
+
+    expect(version).toBe('1.0.3')
+  })
+
+  test('When version spec if invalid', () => {
+    const fetcher = new OctopusCLIVersionFetcher(['1.0.0', '2.0.0', '2.1.0'])
+
+    expect(() => fetcher.getVersion('*.*')).toThrow()
+
+    expect(() => fetcher.getVersion('*.2')).toThrow()
+
+    expect(() => fetcher.getVersion('sdfs')).toThrow()
+  })
+
+  test('Get latest major', () => {
+    const fetcher = new OctopusCLIVersionFetcher([
+      '1.0.0',
+      '2.0.0',
+      '2.1.0',
+      '3.0.0'
+    ])
+
+    const version = fetcher.getVersion('2')
+
+    expect(version).toBe('2.1.0')
+  })
+
+  test('Get latest not pre-release', () => {
+    const fetcher = new OctopusCLIVersionFetcher([
+      '1.0.0',
+      '1.0.3',
+      '2.1.0',
+      '3.0.0',
+      '4.0.0-pre'
+    ])
+
+    const version = fetcher.getVersion('*')
+
+    expect(version).toBe('3.0.0')
+  })
+})