Add more unit tests for config package

3 files changed, 723 insertions, 67 deletions

diff --git a/config/config.go b/config/config.go
index c13a7f9..e05a168 100644
--- a/config/config.go
+++ b/config/config.go
@@ -1,4 +1,4 @@
-// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Copyright 2018 Frédéric Guillot. All rights reserved.
 // Use of this source code is governed by the Apache 2.0
 // license that can be found in the LICENSE file.
 
@@ -14,20 +14,24 @@ import (
 )
 
 const (
-	defaultBaseURL          = "http://localhost"
-	defaultDatabaseURL      = "postgres://postgres:postgres@localhost/miniflux2?sslmode=disable"
-	defaultWorkerPoolSize   = 5
-	defaultPollingFrequency = 60
-	defaultBatchSize        = 10
-	defaultDatabaseMaxConns = 20
-	defaultDatabaseMinConns = 1
-	defaultListenAddr       = "127.0.0.1:8080"
-	defaultCertFile         = ""
-	defaultKeyFile          = ""
-	defaultCertDomain       = ""
-	defaultCertCache        = "/tmp/cert_cache"
-	defaultCleanupFrequency = 24
-	defaultProxyImages      = "http-only"
+	defaultBaseURL            = "http://localhost"
+	defaultDatabaseURL        = "postgres://postgres:postgres@localhost/miniflux2?sslmode=disable"
+	defaultWorkerPoolSize     = 5
+	defaultPollingFrequency   = 60
+	defaultBatchSize          = 10
+	defaultDatabaseMaxConns   = 20
+	defaultDatabaseMinConns   = 1
+	defaultListenAddr         = "127.0.0.1:8080"
+	defaultCertFile           = ""
+	defaultKeyFile            = ""
+	defaultCertDomain         = ""
+	defaultCertCache          = "/tmp/cert_cache"
+	defaultCleanupFrequency   = 24
+	defaultProxyImages        = "http-only"
+	defaultOAuth2ClientID     = ""
+	defaultOAuth2ClientSecret = ""
+	defaultOAuth2RedirectURL  = ""
+	defaultOAuth2Provider     = ""
 )
 
 // Config manages configuration parameters.
@@ -38,25 +42,6 @@ type Config struct {
 	basePath string
 }
 
-func (c *Config) get(key, fallback string) string {
-	value := os.Getenv(key)
-	if value == "" {
-		return fallback
-	}
-
-	return value
-}
-
-func (c *Config) getInt(key string, fallback int) int {
-	value := os.Getenv(key)
-	if value == "" {
-		return fallback
-	}
-
-	v, _ := strconv.Atoi(value)
-	return v
-}
-
 func (c *Config) parseBaseURL() {
 	baseURL := os.Getenv("BASE_URL")
 	if baseURL == "" {
@@ -88,7 +73,7 @@ func (c *Config) parseBaseURL() {
 
 // HasDebugMode returns true if debug mode is enabled.
 func (c *Config) HasDebugMode() bool {
-	return c.get("DEBUG", "") != ""
+	return getBooleanValue("DEBUG")
 }
 
 // BaseURL returns the application base URL with path.
@@ -122,12 +107,12 @@ func (c *Config) DatabaseURL() string {
 
 // DatabaseMaxConns returns the maximum number of database connections.
 func (c *Config) DatabaseMaxConns() int {
-	return c.getInt("DATABASE_MAX_CONNS", defaultDatabaseMaxConns)
+	return getIntValue("DATABASE_MAX_CONNS", defaultDatabaseMaxConns)
 }
 
 // DatabaseMinConns returns the minimum number of database connections.
 func (c *Config) DatabaseMinConns() int {
-	return c.getInt("DATABASE_MIN_CONNS", defaultDatabaseMinConns)
+	return getIntValue("DATABASE_MIN_CONNS", defaultDatabaseMinConns)
 }
 
 // ListenAddr returns the listen address for the HTTP server.
@@ -136,97 +121,97 @@ func (c *Config) ListenAddr() string {
 		return ":" + port
 	}
 
-	return c.get("LISTEN_ADDR", defaultListenAddr)
+	return getStringValue("LISTEN_ADDR", defaultListenAddr)
 }
 
 // CertFile returns the SSL certificate filename if any.
 func (c *Config) CertFile() string {
-	return c.get("CERT_FILE", defaultCertFile)
+	return getStringValue("CERT_FILE", defaultCertFile)
 }
 
 // KeyFile returns the private key filename for custom SSL certificate.
 func (c *Config) KeyFile() string {
-	return c.get("KEY_FILE", defaultKeyFile)
+	return getStringValue("KEY_FILE", defaultKeyFile)
 }
 
 // CertDomain returns the domain to use for Let's Encrypt certificate.
 func (c *Config) CertDomain() string {
-	return c.get("CERT_DOMAIN", defaultCertDomain)
+	return getStringValue("CERT_DOMAIN", defaultCertDomain)
 }
 
 // CertCache returns the directory to use for Let's Encrypt session cache.
 func (c *Config) CertCache() string {
-	return c.get("CERT_CACHE", defaultCertCache)
+	return getStringValue("CERT_CACHE", defaultCertCache)
 }
 
 // CleanupFrequency returns the interval for cleanup jobs.
 func (c *Config) CleanupFrequency() int {
-	return c.getInt("CLEANUP_FREQUENCY", defaultCleanupFrequency)
+	return getIntValue("CLEANUP_FREQUENCY", defaultCleanupFrequency)
 }
 
 // WorkerPoolSize returns the number of background worker.
 func (c *Config) WorkerPoolSize() int {
-	return c.getInt("WORKER_POOL_SIZE", defaultWorkerPoolSize)
+	return getIntValue("WORKER_POOL_SIZE", defaultWorkerPoolSize)
 }
 
 // PollingFrequency returns the interval to refresh feeds in the background.
 func (c *Config) PollingFrequency() int {
-	return c.getInt("POLLING_FREQUENCY", defaultPollingFrequency)
+	return getIntValue("POLLING_FREQUENCY", defaultPollingFrequency)
 }
 
 // BatchSize returns the number of feeds to send for background processing.
 func (c *Config) BatchSize() int {
-	return c.getInt("BATCH_SIZE", defaultBatchSize)
+	return getIntValue("BATCH_SIZE", defaultBatchSize)
 }
 
 // IsOAuth2UserCreationAllowed returns true if user creation is allowed for OAuth2 users.
 func (c *Config) IsOAuth2UserCreationAllowed() bool {
-	return c.getInt("OAUTH2_USER_CREATION", 0) == 1
+	return getBooleanValue("OAUTH2_USER_CREATION")
 }
 
 // OAuth2ClientID returns the OAuth2 Client ID.
 func (c *Config) OAuth2ClientID() string {
-	return c.get("OAUTH2_CLIENT_ID", "")
+	return getStringValue("OAUTH2_CLIENT_ID", defaultOAuth2ClientID)
 }
 
 // OAuth2ClientSecret returns the OAuth2 client secret.
 func (c *Config) OAuth2ClientSecret() string {
-	return c.get("OAUTH2_CLIENT_SECRET", "")
+	return getStringValue("OAUTH2_CLIENT_SECRET", defaultOAuth2ClientSecret)
 }
 
 // OAuth2RedirectURL returns the OAuth2 redirect URL.
 func (c *Config) OAuth2RedirectURL() string {
-	return c.get("OAUTH2_REDIRECT_URL", "")
+	return getStringValue("OAUTH2_REDIRECT_URL", defaultOAuth2RedirectURL)
 }
 
 // OAuth2Provider returns the name of the OAuth2 provider configured.
 func (c *Config) OAuth2Provider() string {
-	return c.get("OAUTH2_PROVIDER", "")
+	return getStringValue("OAUTH2_PROVIDER", defaultOAuth2Provider)
 }
 
 // HasHSTS returns true if HTTP Strict Transport Security is enabled.
 func (c *Config) HasHSTS() bool {
-	return c.get("DISABLE_HSTS", "") == ""
+	return !getBooleanValue("DISABLE_HSTS")
 }
 
 // RunMigrations returns true if the environment variable RUN_MIGRATIONS is not empty.
 func (c *Config) RunMigrations() bool {
-	return c.get("RUN_MIGRATIONS", "") != ""
+	return getBooleanValue("RUN_MIGRATIONS")
 }
 
 // CreateAdmin returns true if the environment variable CREATE_ADMIN is not empty.
 func (c *Config) CreateAdmin() bool {
-	return c.get("CREATE_ADMIN", "") != ""
+	return getBooleanValue("CREATE_ADMIN")
 }
 
 // PocketConsumerKey returns the Pocket Consumer Key if defined as environment variable.
 func (c *Config) PocketConsumerKey(defaultValue string) string {
-	return c.get("POCKET_CONSUMER_KEY", defaultValue)
+	return getStringValue("POCKET_CONSUMER_KEY", defaultValue)
 }
 
 // ProxyImages returns "none" to never proxy, "http-only" to proxy non-HTTPS, "all" to always proxy.
 func (c *Config) ProxyImages() string {
-	return c.get("PROXY_IMAGES", defaultProxyImages)
+	return getStringValue("PROXY_IMAGES", defaultProxyImages)
 }
 
 // NewConfig returns a new Config.
@@ -234,9 +219,40 @@ func NewConfig() *Config {
 	cfg := &Config{
 		baseURL: defaultBaseURL,
 		rootURL: defaultBaseURL,
-		IsHTTPS: os.Getenv("HTTPS") != "",
+		IsHTTPS: getBooleanValue("HTTPS"),
 	}
 
 	cfg.parseBaseURL()
 	return cfg
 }
+
+func getBooleanValue(key string) bool {
+	value := strings.ToLower(os.Getenv(key))
+	if value == "1" || value == "yes" || value == "true" || value == "on" {
+		return true
+	}
+	return false
+}
+
+func getStringValue(key, fallback string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		return fallback
+	}
+
+	return value
+}
+
+func getIntValue(key string, fallback int) int {
+	value := os.Getenv(key)
+	if value == "" {
+		return fallback
+	}
+
+	v, err := strconv.Atoi(value)
+	if err != nil {
+		return fallback
+	}
+
+	return v
+}
diff --git a/config/config_test.go b/config/config_test.go
index a32edfc..76b3ac5 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -1,4 +1,4 @@
-// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Copyright 2018 Frédéric Guillot. All rights reserved.
 // Use of this source code is governed by the Apache 2.0
 // license that can be found in the LICENSE file.
 
@@ -9,6 +9,75 @@ import (
 	"testing"
 )
 
+func TestGetBooleanValueWithUnsetVariable(t *testing.T) {
+	os.Clearenv()
+	if getBooleanValue("MY_TEST_VARIABLE") {
+		t.Errorf(`Unset variables should returns false`)
+	}
+}
+
+func TestGetBooleanValue(t *testing.T) {
+	scenarios := map[string]bool{
+		"":        false,
+		"1":       true,
+		"Yes":     true,
+		"yes":     true,
+		"True":    true,
+		"true":    true,
+		"on":      true,
+		"false":   false,
+		"off":     false,
+		"invalid": false,
+	}
+
+	for input, expected := range scenarios {
+		os.Clearenv()
+		os.Setenv("MY_TEST_VARIABLE", input)
+		result := getBooleanValue("MY_TEST_VARIABLE")
+		if result != expected {
+			t.Errorf(`Unexpected result for %q, got %v instead of %v`, input, result, expected)
+		}
+	}
+}
+
+func TestGetStringValueWithUnsetVariable(t *testing.T) {
+	os.Clearenv()
+	if getStringValue("MY_TEST_VARIABLE", "defaultValue") != "defaultValue" {
+		t.Errorf(`Unset variables should returns the default value`)
+	}
+}
+
+func TestGetStringValue(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("MY_TEST_VARIABLE", "test")
+	if getStringValue("MY_TEST_VARIABLE", "defaultValue") != "test" {
+		t.Errorf(`Defined variables should returns the specified value`)
+	}
+}
+
+func TestGetIntValueWithUnsetVariable(t *testing.T) {
+	os.Clearenv()
+	if getIntValue("MY_TEST_VARIABLE", 42) != 42 {
+		t.Errorf(`Unset variables should returns the default value`)
+	}
+}
+
+func TestGetIntValueWithInvalidInput(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("MY_TEST_VARIABLE", "invalid integer")
+	if getIntValue("MY_TEST_VARIABLE", 42) != 42 {
+		t.Errorf(`Invalid integer should returns the default value`)
+	}
+}
+
+func TestGetIntValue(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("MY_TEST_VARIABLE", "2018")
+	if getIntValue("MY_TEST_VARIABLE", 42) != 2018 {
+		t.Errorf(`Defined variables should returns the specified value`)
+	}
+}
+
 func TestDebugModeOn(t *testing.T) {
 	os.Clearenv()
 	os.Setenv("DEBUG", "1")
@@ -100,15 +169,33 @@ func TestBaseURLWithInvalidScheme(t *testing.T) {
 	}
 }
 
+func TestInvalidBaseURL(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("BASE_URL", "http://example|org")
+	cfg := NewConfig()
+
+	if cfg.BaseURL() != defaultBaseURL {
+		t.Fatalf(`Unexpected base URL, got "%s"`, cfg.BaseURL())
+	}
+
+	if cfg.RootURL() != defaultBaseURL {
+		t.Fatalf(`Unexpected root URL, got "%s"`, cfg.RootURL())
+	}
+
+	if cfg.BasePath() != "" {
+		t.Fatalf(`Unexpected base path, got "%s"`, cfg.BasePath())
+	}
+}
+
 func TestDefaultBaseURL(t *testing.T) {
 	os.Clearenv()
 	cfg := NewConfig()
 
-	if cfg.BaseURL() != "http://localhost" {
+	if cfg.BaseURL() != defaultBaseURL {
 		t.Fatalf(`Unexpected base URL, got "%s"`, cfg.BaseURL())
 	}
 
-	if cfg.RootURL() != "http://localhost" {
+	if cfg.RootURL() != defaultBaseURL {
 		t.Fatalf(`Unexpected root URL, got "%s"`, cfg.RootURL())
 	}
 
@@ -117,21 +204,574 @@ func TestDefaultBaseURL(t *testing.T) {
 	}
 }
 
-func TestHSTSOn(t *testing.T) {
+func TestDatabaseURL(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("DATABASE_URL", "foobar")
+
+	cfg := NewConfig()
+	expected := "foobar"
+	result := cfg.DatabaseURL()
+
+	if result != expected {
+		t.Fatalf(`Unexpected DATABASE_URL value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultDatabaseURLValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.DatabaseURL()
+	expected := defaultDatabaseURL
+
+	if result != expected {
+		t.Fatalf(`Unexpected DATABASE_URL value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultDatabaseMaxConnsValue(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := defaultDatabaseMaxConns
+	result := cfg.DatabaseMaxConns()
+
+	if result != expected {
+		t.Fatalf(`Unexpected DATABASE_MAX_CONNS value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestDeatabaseMaxConns(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("DATABASE_MAX_CONNS", "42")
+
+	cfg := NewConfig()
+	expected := 42
+	result := cfg.DatabaseMaxConns()
+
+	if result != expected {
+		t.Fatalf(`Unexpected DATABASE_MAX_CONNS value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestDefaultDatabaseMinConnsValue(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := defaultDatabaseMinConns
+	result := cfg.DatabaseMinConns()
+
+	if result != expected {
+		t.Fatalf(`Unexpected DATABASE_MIN_CONNS value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestDatabaseMinConns(t *testing.T) {
 	os.Clearenv()
+	os.Setenv("DATABASE_MIN_CONNS", "42")
+
 	cfg := NewConfig()
+	expected := 42
+	result := cfg.DatabaseMinConns()
 
-	if !cfg.HasHSTS() {
-		t.Fatalf(`Unexpected HSTS value, got "%v"`, cfg.HasHSTS())
+	if result != expected {
+		t.Fatalf(`Unexpected DATABASE_MIN_CONNS value, got %v instead of %v`, result, expected)
 	}
 }
 
-func TestHSTSOff(t *testing.T) {
+func TestListenAddr(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("LISTEN_ADDR", "foobar")
+
+	cfg := NewConfig()
+	expected := "foobar"
+	result := cfg.ListenAddr()
+
+	if result != expected {
+		t.Fatalf(`Unexpected LISTEN_ADDR value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestListenAddrWithPortDefined(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("PORT", "3000")
+	os.Setenv("LISTEN_ADDR", "foobar")
+
+	cfg := NewConfig()
+	expected := ":3000"
+	result := cfg.ListenAddr()
+
+	if result != expected {
+		t.Fatalf(`Unexpected LISTEN_ADDR value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultListenAddrValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.ListenAddr()
+	expected := defaultListenAddr
+
+	if result != expected {
+		t.Fatalf(`Unexpected LISTEN_ADDR value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestCertFile(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("CERT_FILE", "foobar")
+
+	cfg := NewConfig()
+	expected := "foobar"
+	result := cfg.CertFile()
+
+	if result != expected {
+		t.Fatalf(`Unexpected CERT_FILE value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultCertFileValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.CertFile()
+	expected := defaultCertFile
+
+	if result != expected {
+		t.Fatalf(`Unexpected CERT_FILE value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestKeyFile(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("KEY_FILE", "foobar")
+
+	cfg := NewConfig()
+	expected := "foobar"
+	result := cfg.KeyFile()
+
+	if result != expected {
+		t.Fatalf(`Unexpected KEY_FILE value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultKeyFileValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.KeyFile()
+	expected := defaultKeyFile
+
+	if result != expected {
+		t.Fatalf(`Unexpected KEY_FILE value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestCertDomain(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("CERT_DOMAIN", "example.org")
+
+	cfg := NewConfig()
+	expected := "example.org"
+	result := cfg.CertDomain()
+
+	if result != expected {
+		t.Fatalf(`Unexpected CERT_DOMAIN value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultCertDomainValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.CertDomain()
+	expected := defaultCertDomain
+
+	if result != expected {
+		t.Fatalf(`Unexpected CERT_DOMAIN value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestCertCache(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("CERT_CACHE", "foobar")
+
+	cfg := NewConfig()
+	expected := "foobar"
+	result := cfg.CertCache()
+
+	if result != expected {
+		t.Fatalf(`Unexpected CERT_CACHE value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultCertCacheValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.CertCache()
+	expected := defaultCertCache
+
+	if result != expected {
+		t.Fatalf(`Unexpected CERT_CACHE value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultCleanupFrequencyValue(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := defaultCleanupFrequency
+	result := cfg.CleanupFrequency()
+
+	if result != expected {
+		t.Fatalf(`Unexpected CLEANUP_FREQUENCY value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestCleanupFrequency(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("CLEANUP_FREQUENCY", "42")
+
+	cfg := NewConfig()
+	expected := 42
+	result := cfg.CleanupFrequency()
+
+	if result != expected {
+		t.Fatalf(`Unexpected CLEANUP_FREQUENCY value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestDefaultWorkerPoolSizeValue(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := defaultWorkerPoolSize
+	result := cfg.WorkerPoolSize()
+
+	if result != expected {
+		t.Fatalf(`Unexpected WORKER_POOL_SIZE value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestWorkerPoolSize(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("WORKER_POOL_SIZE", "42")
+
+	cfg := NewConfig()
+	expected := 42
+	result := cfg.WorkerPoolSize()
+
+	if result != expected {
+		t.Fatalf(`Unexpected WORKER_POOL_SIZE value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestDefautPollingFrequencyValue(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := defaultPollingFrequency
+	result := cfg.PollingFrequency()
+
+	if result != expected {
+		t.Fatalf(`Unexpected POLLING_FREQUENCY value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestPollingFrequency(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("POLLING_FREQUENCY", "42")
+
+	cfg := NewConfig()
+	expected := 42
+	result := cfg.PollingFrequency()
+
+	if result != expected {
+		t.Fatalf(`Unexpected POLLING_FREQUENCY value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestDefaultBatchSizeValue(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := defaultBatchSize
+	result := cfg.BatchSize()
+
+	if result != expected {
+		t.Fatalf(`Unexpected BATCH_SIZE value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestBatchSize(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("BATCH_SIZE", "42")
+
+	cfg := NewConfig()
+	expected := 42
+	result := cfg.BatchSize()
+
+	if result != expected {
+		t.Fatalf(`Unexpected BATCH_SIZE value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestOAuth2UserCreationWhenUnset(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := false
+	result := cfg.IsOAuth2UserCreationAllowed()
+
+	if result != expected {
+		t.Fatalf(`Unexpected OAUTH2_USER_CREATION value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestOAuth2UserCreationAdmin(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("OAUTH2_USER_CREATION", "1")
+
+	cfg := NewConfig()
+	expected := true
+	result := cfg.IsOAuth2UserCreationAllowed()
+
+	if result != expected {
+		t.Fatalf(`Unexpected OAUTH2_USER_CREATION value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestOAuth2ClientID(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("OAUTH2_CLIENT_ID", "foobar")
+
+	cfg := NewConfig()
+	expected := "foobar"
+	result := cfg.OAuth2ClientID()
+
+	if result != expected {
+		t.Fatalf(`Unexpected OAUTH2_CLIENT_ID value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultOAuth2ClientIDValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.OAuth2ClientID()
+	expected := defaultOAuth2ClientID
+
+	if result != expected {
+		t.Fatalf(`Unexpected OAUTH2_CLIENT_ID value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestOAuth2ClientSecret(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("OAUTH2_CLIENT_SECRET", "secret")
+
+	cfg := NewConfig()
+	expected := "secret"
+	result := cfg.OAuth2ClientSecret()
+
+	if result != expected {
+		t.Fatalf(`Unexpected OAUTH2_CLIENT_SECRET value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultOAuth2ClientSecretValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.OAuth2ClientSecret()
+	expected := defaultOAuth2ClientSecret
+
+	if result != expected {
+		t.Fatalf(`Unexpected OAUTH2_CLIENT_SECRET value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestOAuth2RedirectURL(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("OAUTH2_REDIRECT_URL", "http://example.org")
+
+	cfg := NewConfig()
+	expected := "http://example.org"
+	result := cfg.OAuth2RedirectURL()
+
+	if result != expected {
+		t.Fatalf(`Unexpected OAUTH2_REDIRECT_URL value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultOAuth2RedirectURLValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.OAuth2RedirectURL()
+	expected := defaultOAuth2RedirectURL
+
+	if result != expected {
+		t.Fatalf(`Unexpected OAUTH2_REDIRECT_URL value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestOAuth2Provider(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("OAUTH2_PROVIDER", "google")
+
+	cfg := NewConfig()
+	expected := "google"
+	result := cfg.OAuth2Provider()
+
+	if result != expected {
+		t.Fatalf(`Unexpected OAUTH2_PROVIDER value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultOAuth2ProviderValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.OAuth2Provider()
+	expected := defaultOAuth2Provider
+
+	if result != expected {
+		t.Fatalf(`Unexpected OAUTH2_PROVIDER value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestHSTSWhenUnset(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := true
+	result := cfg.HasHSTS()
+
+	if result != expected {
+		t.Fatalf(`Unexpected DISABLE_HSTS value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestHSTS(t *testing.T) {
 	os.Clearenv()
 	os.Setenv("DISABLE_HSTS", "1")
+
+	cfg := NewConfig()
+	expected := false
+	result := cfg.HasHSTS()
+
+	if result != expected {
+		t.Fatalf(`Unexpected DISABLE_HSTS value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestRunMigrationsWhenUnset(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := false
+	result := cfg.RunMigrations()
+
+	if result != expected {
+		t.Fatalf(`Unexpected RUN_MIGRATIONS value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestRunMigrations(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("RUN_MIGRATIONS", "yes")
+
+	cfg := NewConfig()
+	expected := true
+	result := cfg.RunMigrations()
+
+	if result != expected {
+		t.Fatalf(`Unexpected RUN_MIGRATIONS value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestCreateAdminWhenUnset(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := false
+	result := cfg.CreateAdmin()
+
+	if result != expected {
+		t.Fatalf(`Unexpected CREATE_ADMIN value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestCreateAdmin(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("CREATE_ADMIN", "true")
+
+	cfg := NewConfig()
+	expected := true
+	result := cfg.CreateAdmin()
+
+	if result != expected {
+		t.Fatalf(`Unexpected CREATE_ADMIN value, got %v instead of %v`, result, expected)
+	}
+}
+
+func TestPocketConsumerKeyFromEnvVariable(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("POCKET_CONSUMER_KEY", "something")
+
+	cfg := NewConfig()
+	expected := "something"
+	result := cfg.PocketConsumerKey("default")
+
+	if result != expected {
+		t.Fatalf(`Unexpected POCKET_CONSUMER_KEY value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestPocketConsumerKeyFromUserPrefs(t *testing.T) {
+	os.Clearenv()
+
+	cfg := NewConfig()
+	expected := "default"
+	result := cfg.PocketConsumerKey("default")
+
+	if result != expected {
+		t.Fatalf(`Unexpected POCKET_CONSUMER_KEY value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestProxyImages(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("PROXY_IMAGES", "all")
+
+	cfg := NewConfig()
+	expected := "all"
+	result := cfg.ProxyImages()
+
+	if result != expected {
+		t.Fatalf(`Unexpected PROXY_IMAGES value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestDefaultProxyImagesValue(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+	result := cfg.ProxyImages()
+	expected := defaultProxyImages
+
+	if result != expected {
+		t.Fatalf(`Unexpected PROXY_IMAGES value, got %q instead of %q`, result, expected)
+	}
+}
+
+func TestHTTPSOff(t *testing.T) {
+	os.Clearenv()
+	cfg := NewConfig()
+
+	if cfg.IsHTTPS {
+		t.Fatalf(`Unexpected HTTPS value, got "%v"`, cfg.IsHTTPS)
+	}
+}
+
+func TestHTTPSOn(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("HTTPS", "on")
 	cfg := NewConfig()
 
-	if cfg.HasHSTS() {
-		t.Fatalf(`Unexpected HSTS value, got "%v"`, cfg.HasHSTS())
+	if !cfg.IsHTTPS {
+		t.Fatalf(`Unexpected HTTPS value, got "%v"`, cfg.IsHTTPS)
 	}
 }
diff --git a/config/doc.go b/config/doc.go
index a5c6547..77c044d 100644
--- a/config/doc.go
+++ b/config/doc.go
@@ -4,7 +4,7 @@
 
 /*
 
-Package config handles configuration values for Miniflux application.
+Package config handles configuration values for the application.
 
 */
 package config // import "miniflux.app/config"