Increase unit test coverage context/exec modules

test/unit/@node-red/runtime/lib/exec_spec.js

@@ -16,7 +16,123 @@
 var should = require("should");
 var sinon = require("sinon");
 var path = require("path");
+var events = require("events");
+
+
+var child_process = require('child_process');
 
 var NR_TEST_UTILS = require("nr-test-utils");
 
 var exec = NR_TEST_UTILS.require("@node-red/runtime/lib/exec");
+
+describe("runtime/exec", function() {
+    var logEvents;
+    var mockProcess;
+
+    beforeEach(function() {
+        var logEventHandler = new events.EventEmitter();
+        logEvents = [];
+        logEventHandler.on('event-log', function(ev) {
+            logEvents.push(ev);
+        });
+        exec.init({events:logEventHandler});
+
+        mockProcess = new events.EventEmitter();
+        mockProcess.stdout = new events.EventEmitter();
+        mockProcess.stderr = new events.EventEmitter();
+        sinon.stub(child_process,'spawn',function(command,args,options) {
+            mockProcess._args = {command,args,options};
+            return mockProcess;
+        });
+    });
+
+    afterEach(function() {
+        if (child_process.spawn.restore) {
+            child_process.spawn.restore();
+        }
+    });
+
+    it("runs command and resolves on success - no emit", function(done) {
+        var command = "cmd";
+        var args = [1,2,3];
+        var opts = { a: true };
+        exec.run(command,args,opts).then(function(result) {
+            command.should.eql(mockProcess._args.command);
+            args.should.eql(mockProcess._args.args);
+            opts.should.eql(mockProcess._args.options);
+            logEvents.length.should.eql(0);
+            result.code.should.eql(0);
+            result.stdout.should.eql("123");
+            result.stderr.should.eql("abc");
+            done();
+        }).catch(done);
+
+        mockProcess.stdout.emit('data',"1");
+        mockProcess.stderr.emit('data',"a");
+        mockProcess.stderr.emit('data',"b");
+        mockProcess.stdout.emit('data',"2");
+        mockProcess.stdout.emit('data',"3");
+        mockProcess.stderr.emit('data',"c");
+        mockProcess.emit('close',0);
+    });
+
+    it("runs command and resolves on success - emit", function(done) {
+        var command = "cmd";
+        var args = [1,2,3];
+        var opts = { a: true };
+        exec.run(command,args,opts,true).then(function(result) {
+            logEvents.length.should.eql(8);
+            done();
+        }).catch(done);
+
+        mockProcess.stdout.emit('data',"1");
+        mockProcess.stderr.emit('data',"a");
+        mockProcess.stderr.emit('data',"b");
+        mockProcess.stdout.emit('data',"2");
+        mockProcess.stdout.emit('data',"3");
+        mockProcess.stderr.emit('data',"c");
+        mockProcess.emit('close',0);
+    })
+
+    it("runs command and rejects on error - close", function(done) {
+        var command = "cmd";
+        var args = [1,2,3];
+        var opts = { a: true };
+        exec.run(command,args,opts).then(function() {
+            done("Command should have rejected");
+        }).catch(function(result) {
+            result
+            result.code.should.eql(123);
+            result.stdout.should.eql("123");
+            result.stderr.should.eql("abc");
+            done();
+        }).catch(done);
+
+        mockProcess.stdout.emit('data',"1");
+        mockProcess.stderr.emit('data',"a");
+        mockProcess.stderr.emit('data',"b");
+        mockProcess.stdout.emit('data',"2");
+        mockProcess.stdout.emit('data',"3");
+        mockProcess.stderr.emit('data',"c");
+        mockProcess.emit('close',123);
+    })
+
+    it("runs command and rejects on error - error", function(done) {
+        var command = "cmd";
+        var args = [1,2,3];
+        var opts = { a: true };
+        exec.run(command,args,opts).then(function() {
+            done("Command should have rejected");
+        }).catch(function(result) {
+            result
+            result.code.should.eql(456);
+            result.stdout.should.eql("");
+            result.stderr.should.eql("test-error");
+            done();
+        }).catch(done);
+
+        mockProcess.emit('error',"test-error");
+        mockProcess.emit('close',456);
+    })
+
+});