chore(test): add tests for doctor command

test/unit/commands/doctor/command-spec.js

@@ -1,8 +1,72 @@
 'use strict';
+const expect = require('chai').expect;
+const sinon = require('sinon');
+const proxyquire = require('proxyquire').noCallThru();
 
 const modulePath = '../../../../lib/commands/doctor/index';
+const errors = require('../../../../lib/errors');
 
-// TODO: remove line once tests are implemented
-require(modulePath);
+describe('Unit: Commands > Doctor', function () {
+    it('defaults to running install checks if no check is supplied', function () {
+        const listrStub = sinon.stub().resolves();
+        const successStub = sinon.stub();
+        const ui = {listr: listrStub, success: successStub};
 
-describe.skip('Unit: Commands > Doctor', function () {});
+        const DoctorCommand = proxyquire(modulePath, {
+            './checks/install': {installChecks: true}
+        });
+        const instance = new DoctorCommand(ui, {system: true});
+
+        return instance.run({}).then(() => {
+            expect(listrStub.calledOnce).to.be.true;
+            expect(listrStub.args[0][0]).to.deep.equal({installChecks: true});
+            expect(listrStub.args[0][1]).to.deep.equal({
+                ui: ui,
+                system: {system: true}
+            });
+            expect(successStub.calledOnce).to.be.true;
+            expect(successStub.args[0][0]).to.match(/checks passed/);
+        });
+    });
+
+    it('rejects if checks category not found', function () {
+        const failStub = sinon.stub();
+        const DoctorCommand = require(modulePath);
+        const instance = new DoctorCommand({fail: failStub}, {system: true});
+
+        return instance.run({category: 'nonexistent'}).then(() => {
+            expect(false, 'error should have been thrown').to.be.true;
+        }).catch((error) => {
+            expect(error).to.not.exist;
+            expect(failStub.calledOnce).to.be.true;
+            expect(failStub.args[0][0]).to.match(/Invalid category/);
+        });
+    });
+
+    it('logs message if a doctor check fails with a SystemError', function () {
+        const listrStub = sinon.stub().rejects(new errors.SystemError({message: 'aaaahhhh'}));
+        const logStub = sinon.stub();
+        const DoctorCommand = require(modulePath);
+        const instance = new DoctorCommand({listr: listrStub, log: logStub});
+
+        return instance.run({}).then(() => {
+            expect(listrStub.calledOnce).to.be.true;
+            expect(logStub.calledTwice).to.be.true;
+            expect(logStub.args[0][0]).to.match(/Checks failed/);
+            expect(logStub.args[1][0]).to.match(/aaaahhhh/);
+        });
+    });
+
+    it('rejects if rejected error is not a system error', function () {
+        const listrStub = sinon.stub().rejects(new Error('aaaahhhh'));
+        const DoctorCommand = require(modulePath);
+        const instance = new DoctorCommand({listr: listrStub});
+
+        return instance.run({}).then(() => {
+            expect(false, 'error should have been thrown').to.be.true;
+        }).catch((error) => {
+            expect(error).to.be.an.instanceof(Error);
+            expect(error.message).to.equal('aaaahhhh');
+        });
+    });
+});