feat(protocol): job messages, protocol version and job model (#7)

internal/master/model/model_test.go

@@ -39,3 +39,20 @@ func TestDisplayName(t *testing.T) {
 		})
 	}
 }
+
+func TestJob_Active(t *testing.T) {
+	cases := []struct {
+		status JobStatus
+		want   bool
+	}{
+		{JobQueued, true},
+		{JobRunning, true},
+		{JobSucceeded, false},
+		{JobFailed, false},
+	}
+	for _, c := range cases {
+		t.Run(string(c.status), func(t *testing.T) {
+			assert.Equal(t, c.want, Job{Status: c.status}.Active())
+		})
+	}
+}