update flag unit tests

internal/flag/boolptrvalue_test.go

@@ -1,6 +1,7 @@
 package flag_test
 
 import (
+	"flag"
 	"slices"
 	"testing"
 
@@ -10,52 +11,86 @@ import (
 func TestBoolPtrValue(t *testing.T) {
 	tests := []struct {
 		input string
-		want  bool
+		want  string
 	}{
 		{
 			input: "True",
-			want:  true,
+			want:  "true",
+		},
+		{
+			input: "true",
+			want:  "true",
+		},
+		{
+			input: "1",
+			want:  "true",
+		},
+		{
+			input: "False",
+			want:  "false",
 		},
 		{
 			input: "false",
-			want:  false,
+			want:  "false",
+		},
+		{
+			input: "0",
+			want:  "false",
 		},
 	}
 
-	value := internalFlag.NewBoolPtrValue()
-
 	for _, test := range slices.All(tests) {
-		if err := value.Set(test.input); err != nil {
+		args := []string{"--boolean-value=" + test.input}
-			t.Fatalf(
+
-				"Unable to parse %s as a BoolPtrValue: %v",
+		t.Run("Flag parsing test: "+test.input, testBoolPtrValueParsing(args, test.want))
-				test.input,
+	}
-				err,
+}
-			)
+
+func testBoolPtrValueParsing(args []string, want string) func(t *testing.T) {
+	return func(t *testing.T) {
+		flagset := flag.NewFlagSet("test", flag.ExitOnError)
+		boolVal := internalFlag.NewBoolPtrValue()
+
+		flagset.Var(&boolVal, "boolean-value", "Boolean value")
+
+		if err := flagset.Parse(args); err != nil {
+			t.Fatalf("Received an error parsing the flag: %v", err)
 		}
 
-		got := *value.Value
+		got := boolVal.String()
 
-		if got != test.want {
+		if got != want {
 			t.Errorf(
-				"Unexpected bool parsed from %s: want %t, got %t",
+				"Unexpected boolean value found after parsing BoolPtrValue: want %s, got %s",
-				test.input,
+				want,
-				test.want,
 				got,
 			)
 		} else {
 			t.Logf(
-				"Expected bool parsed from %s: got %t",
+				"Expected boolean value found after parsing BoolPtrValue: got %s",
-				test.input,
 				got,
 			)
 		}
 	}
 }
 
-func TestNilBoolPtrValue(t *testing.T) {
+func TestNotSetBoolPtrValue(t *testing.T) {
-	value := internalFlag.NewBoolPtrValue()
+	flagset := flag.NewFlagSet("test", flag.ExitOnError)
+	boolVal := internalFlag.NewBoolPtrValue()
+
+	var otherVal string
+
+	flagset.Var(&boolVal, "boolean-value", "Boolean value")
+	flagset.StringVar(&otherVal, "other-value", "", "Another value")
+
+	args := []string{"--other-value", "other-value"}
+
+	if err := flagset.Parse(args); err != nil {
+		t.Fatalf("Received an error parsing the flag: %v", err)
+	}
+
 	want := "NOT SET"
-	got := value.String()
+	got := boolVal.String()
 
 	if got != want {
 		t.Errorf("Unexpected string returned from the nil value; want %s, got %s", want, got)

internal/flag/timedurationvalue_test.go

@@ -1,6 +1,7 @@
 package flag_test
 
 import (
+	"flag"
 	"slices"
 	"testing"
 
@@ -13,47 +14,52 @@ func TestTimeDurationValue(t *testing.T) {
 		want  string
 	}{
 		{
-			input: "1 day",
+			input: `"1 day"`,
 			want:  "24h0m0s",
 		},
 		{
-			input: "3 days, 5 hours, 39 minutes and 6 seconds",
+			input: `"3 days, 5 hours, 39 minutes and 6 seconds"`,
 			want:  "77h39m6s",
 		},
 		{
-			input: "1 minute and 30 seconds",
+			input: `"1 minute and 30 seconds"`,
 			want:  "1m30s",
 		},
 		{
-			input: "(7 seconds) (21 hours) (41 days)",
+			input: `"(7 seconds) (21 hours) (41 days)"`,
 			want:  "1005h0m7s",
 		},
 	}
 
-	value := internalFlag.NewTimeDurationValue()
-
 	for _, test := range slices.All(parsingTests) {
-		if err := value.Set(test.input); err != nil {
+		args := []string{"--duration", test.input}
-			t.Fatalf(
+
-				"Unable to parse %s into a TimeDurationValue: %v",
+		t.Run("Flag parsing test: "+test.input, testTimeDurationValueParsing(args, test.want))
-				test.input,
+	}
-				err,
+}
-			)
+
+func testTimeDurationValueParsing(args []string, want string) func(t *testing.T) {
+	return func(t *testing.T) {
+		flagset := flag.NewFlagSet("test", flag.ExitOnError)
+		duration := internalFlag.NewTimeDurationValue()
+
+		flagset.Var(&duration, "duration", "Duration value")
+
+		if err := flagset.Parse(args); err != nil {
+			t.Fatalf("Received an error parsing the flag: %v", err)
 		}
 
-		got := value.String()
+		got := duration.String()
 
-		if got != test.want {
+		if got != want {
 			t.Errorf(
-				"Unexpected duration parsed from %s: want %s, got %s",
+				"Unexpected duration parsed from the flag: want %s, got %s",
-				test.input,
+				want,
-				test.want,
 				got,
 			)
 		} else {
 			t.Logf(
-				"Expected duration parsed from %s: got %s",
+				"Expected duration parsed from the flag: got %s",
-				test.input,
 				got,
 			)
 		}