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Added Level type - A custom int type with constants DEBUG, INFO, WARNING, ERROR in increasing severity order.

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Added `minLevel` field to Logger struct to track the minimum level threshold.
Added `SetLevel()` and `GetLevel()` methods for dynamically changing/reading the log level at runtime.
This commit is contained in:
Zeni Kim 2026-05-06 16:06:25 -05:00
parent 5e389115fc
commit 0da7ea8ab1
3 changed files with 331 additions and 24 deletions
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175
logger/logger_test.go
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@ -61,7 +61,7 @@ func TestInfo(t *testing.T) {
t.Error("error testing info")
}
t.Cleanup(func() {
CloseLogsFile()
l.Close()
})
}
@ -84,7 +84,7 @@ func TestWarning(t *testing.T) {
t.Error("failed testing warning")
}
t.Cleanup(func() {
CloseLogsFile()
l.Close()
})
}
@ -106,7 +106,7 @@ func TestDebug(t *testing.T) {
t.Error("error testing debug")
}
t.Cleanup(func() {
CloseLogsFile()
l.Close()
})
}
@ -128,6 +128,173 @@ func TestError(t *testing.T) {
t.Error("failed testing error")
}
t.Cleanup(func() {
CloseLogsFile()
l.Close()
})
}
func TestLevelFiltering(t *testing.T) {
t.Run("NewLoggerWithLevel_DEBUG", func(t *testing.T) {
path := filepath.Join(t.TempDir(), uuid.NewString())
l := NewLoggerWithLevel(&LogFileDriver{FilePath: path}, DEBUG)
l.Debug("debug-msg")
l.Info("info-msg")
l.Warning("warn-msg")
l.Error("err-msg")
l.Close()
b, _ := os.ReadFile(path)
content := string(b)
if !strings.Contains(content, "debug-msg") {
t.Error("expected debug-msg to be logged at DEBUG level")
}
if !strings.Contains(content, "info-msg") {
t.Error("expected info-msg to be logged at DEBUG level")
}
if !strings.Contains(content, "warn-msg") {
t.Error("expected warn-msg to be logged at DEBUG level")
}
if !strings.Contains(content, "err-msg") {
t.Error("expected err-msg to be logged at DEBUG level")
}
})
t.Run("NewLoggerWithLevel_INFO", func(t *testing.T) {
path := filepath.Join(t.TempDir(), uuid.NewString())
l := NewLoggerWithLevel(&LogFileDriver{FilePath: path}, INFO)
l.Debug("debug-msg")
l.Info("info-msg")
l.Warning("warn-msg")
l.Error("err-msg")
l.Close()
b, _ := os.ReadFile(path)
content := string(b)
if strings.Contains(content, "debug-msg") {
t.Error("debug-msg should NOT be logged at INFO minimum level")
}
if !strings.Contains(content, "info-msg") {
t.Error("expected info-msg to be logged at INFO level")
}
if !strings.Contains(content, "warn-msg") {
t.Error("expected warn-msg to be logged at INFO level")
}
if !strings.Contains(content, "err-msg") {
t.Error("expected err-msg to be logged at INFO level")
}
})
t.Run("NewLoggerWithLevel_WARNING", func(t *testing.T) {
path := filepath.Join(t.TempDir(), uuid.NewString())
l := NewLoggerWithLevel(&LogFileDriver{FilePath: path}, WARNING)
l.Debug("debug-msg")
l.Info("info-msg")
l.Warning("warn-msg")
l.Error("err-msg")
l.Close()
b, _ := os.ReadFile(path)
content := string(b)
if strings.Contains(content, "debug-msg") {
t.Error("debug-msg should NOT be logged at WARNING minimum level")
}
if strings.Contains(content, "info-msg") {
t.Error("info-msg should NOT be logged at WARNING minimum level")
}
if !strings.Contains(content, "warn-msg") {
t.Error("expected warn-msg to be logged at WARNING level")
}
if !strings.Contains(content, "err-msg") {
t.Error("expected err-msg to be logged at WARNING level")
}
})
t.Run("NewLoggerWithLevel_ERROR", func(t *testing.T) {
path := filepath.Join(t.TempDir(), uuid.NewString())
l := NewLoggerWithLevel(&LogFileDriver{FilePath: path}, ERROR)
l.Debug("debug-msg")
l.Info("info-msg")
l.Warning("warn-msg")
l.Error("err-msg")
l.Close()
b, _ := os.ReadFile(path)
content := string(b)
if strings.Contains(content, "debug-msg") {
t.Error("debug-msg should NOT be logged at ERROR minimum level")
}
if strings.Contains(content, "info-msg") {
t.Error("info-msg should NOT be logged at ERROR minimum level")
}
if strings.Contains(content, "warn-msg") {
t.Error("warn-msg should NOT be logged at ERROR minimum level")
}
if !strings.Contains(content, "err-msg") {
t.Error("expected err-msg to be logged at ERROR level")
}
})
t.Run("SetLevel_dynamically", func(t *testing.T) {
path := filepath.Join(t.TempDir(), uuid.NewString())
l := NewLogger(&LogFileDriver{FilePath: path})
// Default is DEBUG, so debug messages are logged
l.Debug("debug-msg-before")
l.SetLevel(WARNING)
l.Debug("debug-msg-after")
l.Info("info-msg-after")
l.Warning("warn-msg-after")
l.Error("err-msg-after")
l.Close()
b, _ := os.ReadFile(path)
content := string(b)
if !strings.Contains(content, "debug-msg-before") {
t.Error("expected debug-msg-before to be logged before level change")
}
if strings.Contains(content, "debug-msg-after") {
t.Error("debug-msg-after should NOT be logged after setting level to WARNING")
}
if strings.Contains(content, "info-msg-after") {
t.Error("info-msg-after should NOT be logged after setting level to WARNING")
}
if !strings.Contains(content, "warn-msg-after") {
t.Error("expected warn-msg-after to be logged at WARNING level")
}
if !strings.Contains(content, "err-msg-after") {
t.Error("expected err-msg-after to be logged at WARNING level")
}
})
}
func TestLevelString(t *testing.T) {
tests := []struct {
level Level
want string
}{
{DEBUG, "debug"},
{INFO, "info"},
{WARNING, "warning"},
{ERROR, "error"},
{Level(99), "unknown"},
}
for _, tt := range tests {
if got := tt.level.String(); got != tt.want {
t.Errorf("Level(%d).String() = %q, want %q", tt.level, got, tt.want)
}
}
}
func TestGetLevel(t *testing.T) {
path := filepath.Join(t.TempDir(), uuid.NewString())
l := NewLoggerWithLevel(&LogFileDriver{FilePath: path}, WARNING)
defer l.Close()
if l.GetLevel() != WARNING {
t.Errorf("GetLevel() = %d, want %d", l.GetLevel(), WARNING)
}
l.SetLevel(INFO)
if l.GetLevel() != INFO {
t.Errorf("GetLevel() after SetLevel(INFO) = %d, want %d", l.GetLevel(), INFO)
}
}