chore: Add some simple logger tests

go.mod

@@ -10,11 +10,13 @@ require (
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/spf13/cobra v1.6.1
 	github.com/spf13/viper v1.14.0
+	github.com/stretchr/testify v1.8.1
 	go.uber.org/zap v1.24.0
 	gopkg.in/yaml.v2 v2.4.0
 )
 
 require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/fsnotify/fsnotify v1.6.0 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/inconshreveable/mousetrap v1.0.1 // indirect
@@ -25,6 +27,7 @@ require (
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rivo/uniseg v0.4.3 // indirect
 	github.com/spf13/afero v1.9.3 // indirect
 	github.com/spf13/cast v1.5.0 // indirect

internal/logger/logger_test.go

@@ -0,0 +1,41 @@
+package logger
+
+import (
+	"os"
+	"path"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestLoggerInit(t *testing.T) {
+	assert.Nil(t, Log.zap)
+
+	InitLogger(LogConfig{Level: "info", FileLocation: "", Dev: false})
+
+	assert.NotNil(t, Log.zap)
+}
+
+func TestLogsToFileIfFileLocationProvided(t *testing.T) {
+	tmpDir := t.TempDir()
+	fileLocation := path.Join(tmpDir, "log")
+
+	InitLogger(LogConfig{Level: "info", FileLocation: fileLocation, Dev: false})
+
+	var expectedLogMsg = "test log foobar"
+	Log.Info(expectedLogMsg)
+
+	b, err := os.ReadFile(fileLocation)
+
+	if (b == nil) || (err != nil) {
+		t.Errorf("Expected log file to be created at %s", fileLocation)
+	}
+
+	assert.Contains(t, string(b), expectedLogMsg)
+}
+
+func TestLoggerDefaultsToInfoLevelOnInvalidLevel(t *testing.T) {
+	InitLogger(LogConfig{Level: "invalid", FileLocation: "", Dev: false})
+
+	assert.Equal(t, Log.zap.Level().String(), "info")
+}