diff --git a/default.go b/default.go new file mode 100644 index 0000000..7e9aa59 --- /dev/null +++ b/default.go @@ -0,0 +1,78 @@ +package flog + +import ( + "os" +) + +var Default Logger + +func init() { + Default = NewLogger(os.Stdout, "color") +} + +func Debug(a ...interface{}) { + Default.Debug(a...) +} +func Debugf(format string, a ...interface{}) { + Default.Debugf(format, a...) +} + +func Error(a ...interface{}) error { + return Default.Error(a...) +} + +func Errorf(format string, a ...interface{}) error { + return Default.Errorf(format, a...) +} + +func Fatal(a ...interface{}) { + Default.Fatal(a...) +} + +func Fatalf(format string, a ...interface{}) { + Default.Fatalf(format, a...) +} + +func Highlight(a ...interface{}) { + Default.Highlight(a...) +} + +func Highlightf(format string, a ...interface{}) { + Default.Highlightf(format, a...) +} + +func Inform(a ...interface{}) { + Default.Inform(a...) +} + +func Informf(format string, a ...interface{}) { + Default.Informf(format, a...) +} + +func Panic(a ...interface{}) { + Default.Panic(a...) +} + +func Panicf(format string, a ...interface{}) { + Default.Panicf(format, a...) +} + +func Trace(a ...interface{}) { + Default.Trace(a...) +} + +func Tracef(format string, a ...interface{}) { + Default.Tracef(format, a...) +} + +func Warn(a ...interface{}) { + Default.Warn(a...) +} + +func Warnf(format string, a ...interface{}) { + Default.Warnf(format, a...) +} + +func Prefix(a ...string) Logger { + return Default.Prefix(a...) +} diff --git a/internal_logger.go b/internal_logger.go new file mode 100644 index 0000000..e1cb2f9 --- /dev/null +++ b/internal_logger.go @@ -0,0 +1,38 @@ +package flog + +import ( + "io" +) + +type internalLogger struct { + prefix string + style string + + writer io.Writer + + canNotLogDebug bool + canNotLogError bool + canNotLogFatal bool + canNotLogHighlight bool + canNotLogInform bool + canNotLogPanic bool + canNotLogTrace bool + canNotLogWarn bool +} + +func NewLogger(writer io.Writer, parameters ...string) Logger { + logger := internalLogger{ + writer:writer, + } + if 1 <= len(parameters) { + style := parameters[0] + switch style { + case "color","colour": + logger.style = "color" + default: + logger.style = "" + } + } + + return logger +} diff --git a/internal_logger_debug.go b/internal_logger_debug.go new file mode 100644 index 0000000..0f51e41 --- /dev/null +++ b/internal_logger_debug.go @@ -0,0 +1,62 @@ +package flog + +import ( + "fmt" + "io" + "strings" +) + +func (receiver internalLogger) CanLogDebug() bool { + return !receiver.canNotLogDebug +} + +func (receiver internalLogger) Debug(a ...interface{}) { + if !receiver.CanLogDebug() { + return + } + if nil == receiver.writer { + return + } + + s := fmt.Sprint(a...) + + receiver.Debugf("%s", s) +} + +func (receiver internalLogger) Debugf(format string, a ...interface{}) { + if !receiver.CanLogDebug() { + return + } + + var writer io.Writer = receiver.writer + if nil == writer { + return + } + + var newformat string + { + var buffer strings.Builder + + switch receiver.style{ + case"color": + buffer.WriteString("\x1b[48;2;1;1;1m") + buffer.WriteString("\x1b[38;2;44;181;233m") + case "": + buffer.WriteString("[debug] ") + } + + buffer.WriteString(format) + + switch receiver.style { + case "color": + buffer.WriteString("\x1b[0m") + buffer.WriteRune('\n') + case "": + buffer.WriteRune('\n') + } + + newformat = buffer.String() + } + + fmt.Fprintf(receiver.writer, newformat, a...) +} diff --git a/internal_logger_debug_test.go b/internal_logger_debug_test.go new file mode 100644 index 0000000..2ef6f4f --- /dev/null +++ b/internal_logger_debug_test.go @@ -0,0 +1,69 @@ +package flog + +import ( + "bytes" + + "testing" +) + +func TestInternalLogger_Debugf(t *testing.T) { + + tests := []struct{ + Format string + Array []interface{} + Expected string + }{ + { + Format: "", + Array: []interface{}(nil), + Expected: "[debug] \n", + }, + { + Format: "", + Array: []interface{}{}, + Expected: "[debug] \n", + }, + + + + { + Format: "hello world", + Array: []interface{}(nil), + Expected: "[debug] hello world\n", + }, + { + Format: "hello world", + Array: []interface{}{}, + Expected: "[debug] hello world\n", + }, + + + + { + Format: "hello %s", + Array: []interface{}{"Joe"}, + Expected: "[debug] hello Joe\n", + }, + { + Format: "hello %s %s", + Array: []interface{}{"Joe", "Blow"}, + Expected: "[debug] hello Joe Blow\n", + }, + } + + for testNumber, test := range tests { + + var buffer bytes.Buffer + + logger := NewLogger(&buffer) + + logger.Debugf(test.Format, test.Array...) + + if expected, actual := test.Expected, buffer.String(); expected != actual { + t.Errorf("For tst #%d, the actual result is not what was expected.", testNumber) + t.Logf("EXPECTED: %q", expected) + t.Logf("ACTUAL: %q", actual) + continue + } + } +} diff --git a/internal_logger_error.go b/internal_logger_error.go new file mode 100644 index 0000000..c3aea1b --- /dev/null +++ b/internal_logger_error.go @@ -0,0 +1,59 @@ +package flog + +import ( + "fmt" + "io" + "strings" +) + +func (receiver internalLogger) CanLogError() bool { + return !receiver.canNotLogError +} + +func (receiver internalLogger) Error(a ...interface{}) error { + s := fmt.Sprint(a...) + + return receiver.Errorf("%s", s) +} + +func (receiver internalLogger) Errorf(format string, a ...interface{}) error { + err := fmt.Errorf(format, a...) + + if !receiver.CanLogError() { + return err + } + + var writer io.Writer = receiver.writer + if nil == writer { + return err + } + + var newformat string + { + var buffer strings.Builder + + switch receiver.style{ + case"color": + buffer.WriteString("\x1b[48;2;1;1;1m") + buffer.WriteString("\x1b[38;222;56;43;6m") + case "": + buffer.WriteString("[ERROR] ") + } + + buffer.WriteString(format) + + switch receiver.style { + case "color": + buffer.WriteString("\x1b[0m") + buffer.WriteRune('\n') + case "": + buffer.WriteRune('\n') + } + + newformat = buffer.String() + } + + fmt.Fprintf(receiver.writer, newformat, a...) + + return err +} diff --git a/internal_logger_error_test.go b/internal_logger_error_test.go new file mode 100644 index 0000000..24092ed --- /dev/null +++ b/internal_logger_error_test.go @@ -0,0 +1,69 @@ +package flog + +import ( + "bytes" + + "testing" +) + +func TestInternalLogger_Errorf(t *testing.T) { + + tests := []struct{ + Format string + Array []interface{} + Expected string + }{ + { + Format: "", + Array: []interface{}(nil), + Expected: "[ERROR] \n", + }, + { + Format: "", + Array: []interface{}{}, + Expected: "[ERROR] \n", + }, + + + + { + Format: "hello world", + Array: []interface{}(nil), + Expected: "[ERROR] hello world\n", + }, + { + Format: "hello world", + Array: []interface{}{}, + Expected: "[ERROR] hello world\n", + }, + + + + { + Format: "hello %s", + Array: []interface{}{"Joe"}, + Expected: "[ERROR] hello Joe\n", + }, + { + Format: "hello %s %s", + Array: []interface{}{"Joe", "Blow"}, + Expected: "[ERROR] hello Joe Blow\n", + }, + } + + for testNumber, test := range tests { + + var buffer bytes.Buffer + + logger := NewLogger(&buffer) + + logger.Errorf(test.Format, test.Array...) + + if expected, actual := test.Expected, buffer.String(); expected != actual { + t.Errorf("For tst #%d, the actual result is not what was expected.", testNumber) + t.Logf("EXPECTED: %q", expected) + t.Logf("ACTUAL: %q", actual) + continue + } + } +} diff --git a/internal_logger_fatal.go b/internal_logger_fatal.go new file mode 100644 index 0000000..04a2894 --- /dev/null +++ b/internal_logger_fatal.go @@ -0,0 +1,60 @@ +package flog + +import ( + "fmt" + "io" + "os" + "strings" +) + +func (receiver internalLogger) CanLogFatal() bool { + return !receiver.canNotLogFatal +} + +func (receiver internalLogger) Fatal(a ...interface{}) { + s := fmt.Sprint(a...) + + receiver.Fatalf("%s", s) +} + +func (receiver internalLogger) Fatalf(format string, a ...interface{}) { + if !receiver.CanLogFatal() { + os.Exit(1) + return + } + + var writer io.Writer = receiver.writer + if nil == writer { + os.Exit(1) + return + } + + var newformat string + { + var buffer strings.Builder + + switch receiver.style{ + case"color": + buffer.WriteString("\x1b[48;2;1;1;1m") + buffer.WriteString("\x1b[38;222;56;43;6m") + case "": + buffer.WriteString("[PANIC] ") + } + + buffer.WriteString(format) + + switch receiver.style { + case "color": + buffer.WriteString("\x1b[0m") + buffer.WriteRune('\n') + case "": + buffer.WriteRune('\n') + } + + newformat = buffer.String() + } + + fmt.Fprintf(receiver.writer, newformat, a...) + + os.Exit(1) +} diff --git a/internal_logger_highlight.go b/internal_logger_highlight.go new file mode 100644 index 0000000..d8a1712 --- /dev/null +++ b/internal_logger_highlight.go @@ -0,0 +1,62 @@ +package flog + +import ( + "fmt" + "io" + "strings" +) + +func (receiver internalLogger) CanLogHighlight() bool { + return !receiver.canNotLogHighlight +} + +func (receiver internalLogger) Highlight(a ...interface{}) { + if !receiver.CanLogHighlight() { + return + } + if nil == receiver.writer { + return + } + + s := fmt.Sprint(a...) + + receiver.Highlightf("%s", s) +} + +func (receiver internalLogger) Highlightf(format string, a ...interface{}) { + if !receiver.CanLogHighlight() { + return + } + + var writer io.Writer = receiver.writer + if nil == writer { + return + } + + var newformat string + { + var buffer strings.Builder + + switch receiver.style{ + case"color": + buffer.WriteString("\x1b[48;2;153;0;17m") + buffer.WriteString("\x1b[38;2;252;246;245m") + case "": + buffer.WriteString("[HIGHLIGHT] ") + } + + buffer.WriteString(format) + + switch receiver.style { + case "color": + buffer.WriteString("\x1b[0m") + buffer.WriteRune('\n') + case "": + buffer.WriteRune('\n') + } + + newformat = buffer.String() + } + + fmt.Fprintf(receiver.writer, newformat, a...) +} diff --git a/internal_logger_highlight_test.go b/internal_logger_highlight_test.go new file mode 100644 index 0000000..26afab5 --- /dev/null +++ b/internal_logger_highlight_test.go @@ -0,0 +1,69 @@ +package flog + +import ( + "bytes" + + "testing" +) + +func TestInternalLogger_Highlightf(t *testing.T) { + + tests := []struct{ + Format string + Array []interface{} + Expected string + }{ + { + Format: "", + Array: []interface{}(nil), + Expected: "[HIGHLIGHT] \n", + }, + { + Format: "", + Array: []interface{}{}, + Expected: "[HIGHLIGHT] \n", + }, + + + + { + Format: "hello world", + Array: []interface{}(nil), + Expected: "[HIGHLIGHT] hello world\n", + }, + { + Format: "hello world", + Array: []interface{}{}, + Expected: "[HIGHLIGHT] hello world\n", + }, + + + + { + Format: "hello %s", + Array: []interface{}{"Joe"}, + Expected: "[HIGHLIGHT] hello Joe\n", + }, + { + Format: "hello %s %s", + Array: []interface{}{"Joe", "Blow"}, + Expected: "[HIGHLIGHT] hello Joe Blow\n", + }, + } + + for testNumber, test := range tests { + + var buffer bytes.Buffer + + logger := NewLogger(&buffer) + + logger.Highlightf(test.Format, test.Array...) + + if expected, actual := test.Expected, buffer.String(); expected != actual { + t.Errorf("For tst #%d, the actual result is not what was expected.", testNumber) + t.Logf("EXPECTED: %q", expected) + t.Logf("ACTUAL: %q", actual) + continue + } + } +} diff --git a/internal_logger_inform.go b/internal_logger_inform.go new file mode 100644 index 0000000..17bbcaf --- /dev/null +++ b/internal_logger_inform.go @@ -0,0 +1,62 @@ +package flog + +import ( + "fmt" + "io" + "strings" +) + +func (receiver internalLogger) CanLogInform() bool { + return !receiver.canNotLogInform +} + +func (receiver internalLogger) Inform(a ...interface{}) { + if !receiver.CanLogInform() { + return + } + if nil == receiver.writer { + return + } + + s := fmt.Sprint(a...) + + receiver.Informf("%s", s) +} + +func (receiver internalLogger) Informf(format string, a ...interface{}) { + if !receiver.CanLogInform() { + return + } + + var writer io.Writer = receiver.writer + if nil == writer { + return + } + + var newformat string + { + var buffer strings.Builder + + switch receiver.style{ + case"color": + buffer.WriteString("\x1b[48;2;1;1;1m") + buffer.WriteString("\x1b[38;222;56;43;6m") + case "": + buffer.WriteString("[inform] ") + } + + buffer.WriteString(format) + + switch receiver.style { + case "color": + buffer.WriteString("\x1b[0m") + buffer.WriteRune('\n') + case "": + buffer.WriteRune('\n') + } + + newformat = buffer.String() + } + + fmt.Fprintf(receiver.writer, newformat, a...) +} diff --git a/internal_logger_inform_test.go b/internal_logger_inform_test.go new file mode 100644 index 0000000..4045242 --- /dev/null +++ b/internal_logger_inform_test.go @@ -0,0 +1,69 @@ +package flog + +import ( + "bytes" + + "testing" +) + +func TestInternalLogger_Informf(t *testing.T) { + + tests := []struct{ + Format string + Array []interface{} + Expected string + }{ + { + Format: "", + Array: []interface{}(nil), + Expected: "[inform] \n", + }, + { + Format: "", + Array: []interface{}{}, + Expected: "[inform] \n", + }, + + + + { + Format: "hello world", + Array: []interface{}(nil), + Expected: "[inform] hello world\n", + }, + { + Format: "hello world", + Array: []interface{}{}, + Expected: "[inform] hello world\n", + }, + + + + { + Format: "hello %s", + Array: []interface{}{"Joe"}, + Expected: "[inform] hello Joe\n", + }, + { + Format: "hello %s %s", + Array: []interface{}{"Joe", "Blow"}, + Expected: "[inform] hello Joe Blow\n", + }, + } + + for testNumber, test := range tests { + + var buffer bytes.Buffer + + logger := NewLogger(&buffer) + + logger.Informf(test.Format, test.Array...) + + if expected, actual := test.Expected, buffer.String(); expected != actual { + t.Errorf("For tst #%d, the actual result is not what was expected.", testNumber) + t.Logf("EXPECTED: %q", expected) + t.Logf("ACTUAL: %q", actual) + continue + } + } +} diff --git a/internal_logger_panic.go b/internal_logger_panic.go new file mode 100644 index 0000000..a23b36a --- /dev/null +++ b/internal_logger_panic.go @@ -0,0 +1,59 @@ +package flog + +import ( + "fmt" + "io" + "strings" +) + +func (receiver internalLogger) CanLogPanic() bool { + return !receiver.canNotLogPanic +} + +func (receiver internalLogger) Panic(a ...interface{}) { + s := fmt.Sprint(a...) + + receiver.Panicf("%s", s) +} + +func (receiver internalLogger) Panicf(format string, a ...interface{}) { + err := fmt.Errorf(format, a...) + + if !receiver.CanLogPanic() { + panic(err) + } + + var writer io.Writer = receiver.writer + if nil == writer { + panic(err) + } + + var newformat string + { + var buffer strings.Builder + + switch receiver.style{ + case"color": + buffer.WriteString("\x1b[48;2;1;1;1m") + buffer.WriteString("\x1b[38;222;56;43;6m") + case "": + buffer.WriteString("[PANIC] ") + } + + buffer.WriteString(format) + + switch receiver.style { + case "color": + buffer.WriteString("\x1b[0m") + buffer.WriteRune('\n') + case "": + buffer.WriteRune('\n') + } + + newformat = buffer.String() + } + + fmt.Fprintf(receiver.writer, newformat, a...) + + panic(err) +} diff --git a/internal_logger_prefix.go b/internal_logger_prefix.go new file mode 100644 index 0000000..030c933 --- /dev/null +++ b/internal_logger_prefix.go @@ -0,0 +1,23 @@ +package flog + +import ( + "strings" +) + +func (receiver internalLogger) Prefix(newprefix ...string) Logger { + var buffer strings.Builder + + buffer.WriteString(receiver.prefix) + + for _, s := range newprefix { + buffer.WriteString(s) + buffer.WriteString(": ") + } + + prefix := buffer.String() + + var logger internalLogger = receiver + logger.prefix += prefix + + return logger +} diff --git a/internal_logger_prefix_test.go b/internal_logger_prefix_test.go new file mode 100644 index 0000000..06810e2 --- /dev/null +++ b/internal_logger_prefix_test.go @@ -0,0 +1,119 @@ +package flog + +import ( + "bytes" + "fmt" + + "testing" +) + +func TestLoggerPrefix(t *testing.T) { + tests := []struct{ + NewPrefix []string + Expected string + }{ + + { + NewPrefix: []string(nil), + Expected: "", + }, + { + NewPrefix: []string{}, + Expected: "", + }, + + + + { + NewPrefix: []string{""}, + Expected: ": ", + }, + { + NewPrefix: []string{"", ""}, + Expected: ": : ", + }, + { + NewPrefix: []string{"", "", ""}, + Expected: ": : : ", + }, + + { + NewPrefix: []string{"", "", "", "", "", "", "", "", "", ""}, + Expected: ": : : : : : : : : : ", + }, + + + + { + NewPrefix: []string{"ONE"}, + Expected: "ONE: ", + }, + { + NewPrefix: []string{"ONE", "TWO"}, + Expected: "ONE: TWO: ", + }, + { + NewPrefix: []string{"ONE", "TWO", "THREE"}, + Expected: "ONE: TWO: THREE: ", + }, + } + + for testNumber, test := range tests { + + var logger internalLogger + + newLogger := logger.Prefix(test.NewPrefix...) + + newInternalLogger, casted := newLogger.(internalLogger) + if !casted { + t.Errorf("For test #%d, could not cast to flog.internalLogger.", testNumber) + t.Logf("TYPE: %T", newLogger) + continue + } + + if expected, actual := test.Expected, newInternalLogger.prefix; expected != actual { + t.Errorf("For test #%d, the actual prefix is not what was expected.", testNumber) + t.Log("EXPECTED:", expected) + t.Log("ACTUAL: ", actual) + continue + } + } +} + +func TestLoggerPrefix_inform(t *testing.T) { + + var buffer bytes.Buffer + + log := NewLogger(&buffer).Prefix("one","two","three") + + func(){ + defer func(){ + if r := recover(); nil != r { + fmt.Fprintf(&buffer, "RECOVER:%v\n",r) + } + }() + log.Panic("hello PANIC") + }() + log.Inform("hello INFORM") + log.Highlight("hello HIGHLIGHT") + log.Error("hello ERROR") + log.Warn("hello WARN") + log.Debug("hello DEBUG") + log.Trace("hello TRACE") + + const expected = "[PANIC] hello PANIC" + "\n" + + "RECOVER:hello PANIC" + "\n" + + "[inform] hello INFORM" + "\n" + + "[HIGHLIGHT] hello HIGHLIGHT" + "\n" + + "[ERROR] hello ERROR" + "\n" + + "[warn] hello WARN" + "\n" + + "[debug] hello DEBUG" + "\n" + + "[trace] hello TRACE" + "\n" + + if actual := buffer.String(); expected != actual { + t.Error("The actual logs is not what was expected.") + t.Log("EXPECTED:\n", expected) + t.Log("ACTUAL:\n", actual) + return + } +} diff --git a/internal_logger_trace.go b/internal_logger_trace.go new file mode 100644 index 0000000..0e6a73e --- /dev/null +++ b/internal_logger_trace.go @@ -0,0 +1,62 @@ +package flog + +import ( + "fmt" + "io" + "strings" +) + +func (receiver internalLogger) CanLogTrace() bool { + return !receiver.canNotLogTrace +} + +func (receiver internalLogger) Trace(a ...interface{}) { + if !receiver.CanLogTrace() { + return + } + if nil == receiver.writer { + return + } + + s := fmt.Sprint(a...) + + receiver.Tracef("%s", s) +} + +func (receiver internalLogger) Tracef(format string, a ...interface{}) { + if !receiver.CanLogTrace() { + return + } + + var writer io.Writer = receiver.writer + if nil == writer { + return + } + + var newformat string + { + var buffer strings.Builder + + switch receiver.style{ + case"color": + buffer.WriteString("\x1b[48;2;1;1;1m") + buffer.WriteString("\x1b[38;2;255;199;6m") + case "": + buffer.WriteString("[trace] ") + } + + buffer.WriteString(format) + + switch receiver.style { + case "color": + buffer.WriteString("\x1b[0m") + buffer.WriteRune('\n') + case "": + buffer.WriteRune('\n') + } + + newformat = buffer.String() + } + + fmt.Fprintf(receiver.writer, newformat, a...) +} diff --git a/internal_logger_trace_test.go b/internal_logger_trace_test.go new file mode 100644 index 0000000..233d64c --- /dev/null +++ b/internal_logger_trace_test.go @@ -0,0 +1,69 @@ +package flog + +import ( + "bytes" + + "testing" +) + +func TestInternalLogger_Tracef(t *testing.T) { + + tests := []struct{ + Format string + Array []interface{} + Expected string + }{ + { + Format: "", + Array: []interface{}(nil), + Expected: "[trace] \n", + }, + { + Format: "", + Array: []interface{}{}, + Expected: "[trace] \n", + }, + + + + { + Format: "hello world", + Array: []interface{}(nil), + Expected: "[trace] hello world\n", + }, + { + Format: "hello world", + Array: []interface{}{}, + Expected: "[trace] hello world\n", + }, + + + + { + Format: "hello %s", + Array: []interface{}{"Joe"}, + Expected: "[trace] hello Joe\n", + }, + { + Format: "hello %s %s", + Array: []interface{}{"Joe", "Blow"}, + Expected: "[trace] hello Joe Blow\n", + }, + } + + for testNumber, test := range tests { + + var buffer bytes.Buffer + + logger := NewLogger(&buffer) + + logger.Tracef(test.Format, test.Array...) + + if expected, actual := test.Expected, buffer.String(); expected != actual { + t.Errorf("For tst #%d, the actual result is not what was expected.", testNumber) + t.Logf("EXPECTED: %q", expected) + t.Logf("ACTUAL: %q", actual) + continue + } + } +} diff --git a/internal_logger_warn.go b/internal_logger_warn.go new file mode 100644 index 0000000..24d6d16 --- /dev/null +++ b/internal_logger_warn.go @@ -0,0 +1,62 @@ +package flog + +import ( + "fmt" + "io" + "strings" +) + +func (receiver internalLogger) CanLogWarn() bool { + return !receiver.canNotLogWarn +} + +func (receiver internalLogger) Warn(a ...interface{}) { + if !receiver.CanLogWarn() { + return + } + if nil == receiver.writer { + return + } + + s := fmt.Sprint(a...) + + receiver.Warnf("%s", s) +} + +func (receiver internalLogger) Warnf(format string, a ...interface{}) { + if !receiver.CanLogWarn() { + return + } + + var writer io.Writer = receiver.writer + if nil == writer { + return + } + + var newformat string + { + var buffer strings.Builder + + switch receiver.style{ + case"color": + buffer.WriteString("\x1b[48;2;1;1;1m") + buffer.WriteString("\x1b[38;222;56;43;6m") + case "": + buffer.WriteString("[warn] ") + } + + buffer.WriteString(format) + + switch receiver.style { + case "color": + buffer.WriteString("\x1b[0m") + buffer.WriteRune('\n') + case "": + buffer.WriteRune('\n') + } + + newformat = buffer.String() + } + + fmt.Fprintf(receiver.writer, newformat, a...) +} diff --git a/internal_logger_warn_test.go b/internal_logger_warn_test.go new file mode 100644 index 0000000..57721ff --- /dev/null +++ b/internal_logger_warn_test.go @@ -0,0 +1,69 @@ +package flog + +import ( + "bytes" + + "testing" +) + +func TestInternalLogger_Warnf(t *testing.T) { + + tests := []struct{ + Format string + Array []interface{} + Expected string + }{ + { + Format: "", + Array: []interface{}(nil), + Expected: "[warn] \n", + }, + { + Format: "", + Array: []interface{}{}, + Expected: "[warn] \n", + }, + + + + { + Format: "hello world", + Array: []interface{}(nil), + Expected: "[warn] hello world\n", + }, + { + Format: "hello world", + Array: []interface{}{}, + Expected: "[warn] hello world\n", + }, + + + + { + Format: "hello %s", + Array: []interface{}{"Joe"}, + Expected: "[warn] hello Joe\n", + }, + { + Format: "hello %s %s", + Array: []interface{}{"Joe", "Blow"}, + Expected: "[warn] hello Joe Blow\n", + }, + } + + for testNumber, test := range tests { + + var buffer bytes.Buffer + + logger := NewLogger(&buffer) + + logger.Warnf(test.Format, test.Array...) + + if expected, actual := test.Expected, buffer.String(); expected != actual { + t.Errorf("For tst #%d, the actual result is not what was expected.", testNumber) + t.Logf("EXPECTED: %q", expected) + t.Logf("ACTUAL: %q", actual) + continue + } + } +} diff --git a/logger.go b/logger.go new file mode 100644 index 0000000..cf58424 --- /dev/null +++ b/logger.go @@ -0,0 +1,37 @@ +package flog + +type Logger interface { + CanLogDebug() bool + Debug(...interface{}) + Debugf(string, ...interface{}) + + CanLogError() bool + Error(...interface{}) error + Errorf(string, ...interface{}) error + + CanLogFatal() bool + Fatal(...interface{}) + Fatalf(string, ...interface{}) + + CanLogHighlight() bool + Highlight(...interface{}) + Highlightf(string, ...interface{}) + + CanLogInform() bool + Inform(...interface{}) + Informf(string, ...interface{}) + + CanLogPanic() bool + Panic(...interface{}) + Panicf(string, ...interface{}) + + CanLogTrace() bool + Trace(...interface{}) + Tracef(string, ...interface{}) + + CanLogWarn() bool + Warn(...interface{}) + Warnf(string, ...interface{}) + + Prefix(...string) Logger +} diff --git a/logger_test.go b/logger_test.go new file mode 100644 index 0000000..f37cf96 --- /dev/null +++ b/logger_test.go @@ -0,0 +1,14 @@ +package flog + +import ( + "testing" +) + +func TestInternalLoggerIsLogger(t *testing.T) { + + var x Logger = internalLogger{} // THIS IS WHAT ACTUALLY MATTERS. + + if nil == x { + t.Error("This should never happen.") + } +}