Test main package (CLI)

main_test.go

@@ -0,0 +1,102 @@
+package main
+
+import (
+	"io/ioutil"
+	"log"
+	"strings"
+	"testing"
+	"time"
+)
+
+func init() {
+	// Discard default log output
+	log.SetOutput(ioutil.Discard)
+}
+
+func TestRateValidation(t *testing.T) {
+	rate, duration, targetsf, ordering, reporter, output := defaultArguments()
+	rate = 0
+
+	err := run(rate, duration, targetsf, ordering, reporter, output)
+	if err == nil || (err != nil && !strings.HasPrefix(err.Error(), errRatePrefix)) {
+		t.Errorf("Rate 0 shouldn't be valid: %s", err)
+	}
+}
+
+func TestDurationValidation(t *testing.T) {
+	rate, duration, targetsf, ordering, reporter, output := defaultArguments()
+	duration = 0
+
+	err := run(rate, duration, targetsf, ordering, reporter, output)
+	if err == nil || (err != nil && !strings.HasPrefix(err.Error(), errDurationPrefix)) {
+		t.Errorf("Duration 0 shouldn't be valid: %s", err)
+	}
+}
+
+func TestOutputValidation(t *testing.T) {
+	rate, duration, targetsf, ordering, reporter, _ := defaultArguments()
+
+	// Good cases
+	for _, output := range []string{"stdout", "/dev/null"} {
+		err := run(rate, duration, targetsf, ordering, reporter, output)
+		if err != nil {
+			t.Errorf("Output file `%s` should be valid: %s", output, err)
+		}
+	}
+
+	// Bad case
+	badOutput := ""
+	err := run(rate, duration, targetsf, ordering, reporter, badOutput)
+	if err == nil || (err != nil && !strings.HasPrefix(err.Error(), errOutputFilePrefix)) {
+		t.Errorf("Output file `%s` shouldn't be valid: %s", badOutput, err)
+	}
+}
+
+func TestReporter(t *testing.T) {
+	rate, duration, targetsf, ordering, reporter, output := defaultArguments()
+
+	err := run(rate, duration, targetsf, ordering, reporter, output)
+	if err != nil {
+		t.Errorf("Reporter shouldn't return an error: %s", err)
+	}
+}
+
+func TestTargetsValidation(t *testing.T) {
+	rate, duration, goodFile, ordering, reporter, output := defaultArguments()
+
+	// Good case
+	err := run(rate, duration, goodFile, ordering, reporter, output)
+	if err != nil {
+		t.Errorf("Targets file `%s` should be valid: %s", goodFile, err)
+	}
+
+	// Bad case
+	badFile := "randomInexistingFile12345.txt"
+	err = run(rate, duration, badFile, ordering, reporter, output)
+	if err == nil || (err != nil && !strings.HasPrefix(err.Error(), errTargetsFilePrefix)) {
+		t.Errorf("Targets file `%s` shouldn't be valid: %s", badFile, err)
+	}
+}
+
+func TestOrderingValidation(t *testing.T) {
+	rate, duration, targetsf, _, reporter, output := defaultArguments()
+
+	// Good cases
+	for _, ordering := range []string{"random", "sequential"} {
+		err := run(rate, duration, targetsf, ordering, reporter, output)
+		if err != nil {
+			t.Errorf("Ordering `%s` should be valid: %s", ordering, err)
+		}
+	}
+
+	// Bad case
+	badOrdering := "lolcat"
+	err := run(rate, duration, targetsf, badOrdering, reporter, output)
+	if err == nil || (err != nil && !strings.HasPrefix(err.Error(), errOrderingPrefix)) {
+		t.Errorf("Ordering `%s` shouldn't be valid: %s", badOrdering, err)
+	}
+}
+
+func defaultArguments() (uint64, time.Duration, string, string, string, string) {
+	return uint64(1000), 5 * time.Millisecond, ".targets.txt", "random", "text", "/dev/null"
+}