wrote startupshutdown tests and added OncePerServerBlock value in the NewTestController function of the controller.go file

config/setup/controller.go

@@ -58,6 +58,9 @@ func NewTestController(input string) *Controller {
 			Root: ".",
 		},
 		Dispenser: parse.NewDispenser("Testfile", strings.NewReader(input)),
+		OncePerServerBlock: func(f func() error) error {
+			return f()
+		},
 	}
 }
 

config/setup/startupshutdown_test.go

@@ -0,0 +1,58 @@
+package setup
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strconv"
+	"testing"
+	"time"
+)
+
+// The Startup function's tests are symmetrical to Shutdown tests,
+// because the Startup and Shutdown functions share virtually the
+// same functionality
+func TestStartup(t *testing.T) {
+
+	tempDirPath, err := getTempDirPath()
+	if err != nil {
+		t.Fatalf("BeforeTest: Failed to find an existing directory for testing! Error was: %v", err)
+	}
+
+	testDir := filepath.Join(tempDirPath, "temp_dir_for_testing_startupshutdown.go")
+	osSenitiveTestDir := filepath.FromSlash(testDir)
+
+	exec.Command("rm", "-r", osSenitiveTestDir).Start() // removes osSenitiveTestDir from the OS's temp directory, if the osSenitiveTestDir already exists
+
+	tests := []struct {
+		input              string
+		shouldExecutionErr bool
+		shouldRemoveErr    bool
+	}{
+		// test case #0 tests proper functionality blocking commands
+		{"startup mkdir " + osSenitiveTestDir, false, false},
+
+		// test case #1 tests proper functionality of non-blocking commands
+		{"startup mkdir " + osSenitiveTestDir, false, true},
+
+		// test case #2 tests handling of non-existant commands
+		{"startup " + strconv.Itoa(int(time.Now().UnixNano())), true, true},
+	}
+
+	for i, test := range tests {
+		c := NewTestController(test.input)
+		_, err = Startup(c)
+		if err != nil {
+			t.Errorf("Expected no errors, got: %v", err)
+		}
+		err = c.Startup[0]()
+		if err != nil && !test.shouldExecutionErr {
+			t.Errorf("Test %d recieved an error of:\n%v", i, err)
+		}
+		err = os.Remove(osSenitiveTestDir)
+		if err != nil && !test.shouldRemoveErr {
+			t.Errorf("Test %d recieved an error of:\n%v", i, err)
+		}
+
+	}
+}