✅ Test config

config/config.go

@@ -4,3 +4,7 @@ type Config struct {
 	Env     Env
 	BaseURL string
 }
+
+func (c Config) Environment() Env {
+	return ValidEnvOrDev(c.Env)
+}

config/config_test.go

@@ -0,0 +1,26 @@
+package config
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestEnvDefaultsToDev(t *testing.T) {
+	c := Config{}
+	assert.Equal(t, DEV, c.Environment())
+}
+
+func TestInvalidEnvReturnsDev(t *testing.T) {
+	c := Config{Env: Env("foobar")}
+	assert.Equal(t, DEV, c.Environment())
+}
+
+func TestValidEnvReturnsCorrect(t *testing.T) {
+	for _, e := range Envs {
+		t.Run(string(e), func(t *testing.T) {
+			c := Config{Env: e}
+			assert.Equal(t, e, c.Environment())
+		})
+	}
+}

config/env_test.go

@@ -0,0 +1,59 @@
+package config
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestEnvString(t *testing.T) {
+	cases := Envs[:]
+	cases = append(cases, Env("foobar"), Env(""), Env("42"), Env("✨"))
+	for _, e := range cases {
+		t.Run(string(e), func(t *testing.T) {
+			assert.Equal(t, string(e), e.String())
+		})
+	}
+}
+
+func TestValidEnv(t *testing.T) {
+	cases := [...]struct {
+		e   Env
+		exp bool
+	}{
+		{DEV, true},
+		{PROD, true},
+		{QA, true},
+		{TEST, true},
+		{Env("foobar"), false},
+		{Env(""), false},
+		{Env("✨"), false},
+	}
+
+	for _, c := range cases {
+		t.Run(string(c.e), func(t *testing.T) {
+			assert.Equal(t, c.exp, ValidEnv(c.e))
+		})
+	}
+}
+
+func TestValidEnvOrDev(t *testing.T) {
+	cases := [...]struct {
+		give Env
+		exp  Env
+	}{
+		{DEV, DEV},
+		{PROD, PROD},
+		{QA, QA},
+		{TEST, TEST},
+		{Env("foobar"), DEV},
+		{Env(""), DEV},
+		{Env("✨"), DEV},
+	}
+
+	for _, c := range cases {
+		t.Run(string(c.give), func(t *testing.T) {
+			assert.Equal(t, c.exp, ValidEnvOrDev(c.give))
+		})
+	}
+}