ethlog: use Godoc for code examples in documentation

This ensures that examples will actually compile.

1 files changed, 21 insertions, 0 deletions

diff --git a/ethlog/example_test.go b/ethlog/example_test.go
new file mode 100644
index 000000000..2532f36c1
--- /dev/null
+++ b/ethlog/example_test.go
@@ -0,0 +1,21 @@
+package ethlog
+
+import "os"
+
+func ExampleLogger() {
+	logger := NewLogger("TAG")
+	logger.Infoln("so awesome")            // prints [TAG] so awesome
+	logger.Infof("this %q is raw", "coin") // prints [TAG] this "coin" is raw
+}
+
+func ExampleLogSystem() {
+	filename := "test.log"
+	file, _ := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, os.ModePerm)
+	fileLog := NewStdLogSystem(file, 0, WarnLevel)
+	AddLogSystem(fileLog)
+
+	stdoutLog := NewStdLogSystem(os.Stdout, 0, WarnLevel)
+	AddLogSystem(stdoutLog)
+
+	NewLogger("TAG").Warnln("reactor meltdown") // writes to both logs
+}