fix(import): ensure import/exports works with 5.x

closes TryGhost/Toolbox#256

- we should only need to add the new unversioned base URL here
- also adds 5.x tests

lib/tasks/import/api.js

@@ -11,7 +11,8 @@ const bases = {
     1: '/ghost/api/v0.1',
     2: '/ghost/api/v2/admin',
     3: '/ghost/api/v3/admin',
-    4: '/ghost/api/v4/admin'
+    4: '/ghost/api/v4/admin',
+    5: '/ghost/api/admin'
 };
 
 function getBaseUrl(version, url) {

test/unit/tasks/import/api-spec.js

@@ -31,6 +31,11 @@ describe('Unit > Tasks > Import > setup', function () {
             expect(baseUrl).to.equal('https://example.com/ghost/api/v4/admin');
         });
 
+        it('5.x', function () {
+            const baseUrl = getBaseUrl('5.0.0', 'https://example.com/');
+            expect(baseUrl).to.equal('https://example.com/ghost/api/admin');
+        });
+
         it('unsupported', function () {
             try {
                 getBaseUrl('0.11.14', 'https://example.com');
@@ -323,6 +328,36 @@ describe('Unit > Tasks > Import > setup', function () {
             expect(sessionScope.isDone()).to.be.true;
             expect(importScope.isDone()).to.be.true;
         });
+
+        it('5.x', async function () {
+            const sessionScope = nock(testUrl, {
+                reqheaders: {
+                    Origin: testUrl
+                }
+            }).post('/ghost/api/admin/session/', {
+                username: 'test@example.com',
+                password: 'password'
+            }).reply(201, 'Success', {
+                'Set-Cookie': 'ghost-admin-api-session=test-session-data; Path=/ghost; HttpOnly; Secure; Expires=Tue, 31 Dec 2099 23:59:59 GMT;'
+            });
+
+            const importScope = nock(testUrl, {
+                reqheaders: {
+                    cookie: [
+                        'ghost-admin-api-session=test-session-data'
+                    ],
+                    origin: testUrl
+                }
+            }).post('/ghost/api/admin/db/').reply(201, {});
+
+            await runImport('5.0.0', 'http://localhost:2368', {
+                username: 'test@example.com',
+                password: 'password'
+            }, path.join(__dirname, 'fixtures/5.x.json'));
+
+            expect(sessionScope.isDone()).to.be.true;
+            expect(importScope.isDone()).to.be.true;
+        });
     });
 
     describe('downloadExport', function () {
@@ -517,4 +552,48 @@ describe('Unit > Tasks > Import > setup', function () {
             expect(fs.readJsonSync(outputFile)).to.deep.equal(exportData);
         });
     });
+
+    it('5.x', async function () {
+        const sessionScope = nock(testUrl, {
+            reqheaders: {
+                Origin: testUrl
+            }
+        }).post('/ghost/api/admin/session/', {
+            username: 'test@example.com',
+            password: 'password'
+        }).reply(201, 'Success', {
+            'Set-Cookie': 'ghost-admin-api-session=test-session-data; Path=/ghost; HttpOnly; Secure; Expires=Tue, 31 Dec 2099 23:59:59 GMT;'
+        });
+
+        const exportData = {
+            db: [{
+                meta: {
+                    version: '5.0.0'
+                },
+                data: {
+                    users: []
+                }
+            }]
+        };
+        const exportScope = nock(testUrl, {
+            reqheaders: {
+                cookie: [
+                    'ghost-admin-api-session=test-session-data'
+                ],
+                origin: testUrl
+            }
+        }).get('/ghost/api/admin/db/').reply(200, exportData);
+
+        const tmpDir = tmp.dirSync();
+        const outputFile = path.join(tmpDir.name, '5.x.json');
+
+        await downloadExport('5.0.0', 'http://localhost:2368', {
+            username: 'test@example.com',
+            password: 'password'
+        }, outputFile);
+
+        expect(sessionScope.isDone()).to.be.true;
+        expect(exportScope.isDone()).to.be.true;
+        expect(fs.readJsonSync(outputFile)).to.deep.equal(exportData);
+    });
 });