Add comprehensive test suite with unit and integration tests

options_test.go

@@ -0,0 +1,154 @@
+package sendamatic
+
+import (
+	"net/http"
+	"testing"
+	"time"
+)
+
+func TestWithBaseURL(t *testing.T) {
+	customURL := "https://custom.api.url"
+	client := NewClient("user", "pass", WithBaseURL(customURL))
+
+	if client.baseURL != customURL {
+		t.Errorf("baseURL = %q, want %q", client.baseURL, customURL)
+	}
+}
+
+func TestWithTimeout(t *testing.T) {
+	customTimeout := 60 * time.Second
+	client := NewClient("user", "pass", WithTimeout(customTimeout))
+
+	if client.httpClient.Timeout != customTimeout {
+		t.Errorf("httpClient.Timeout = %v, want %v", client.httpClient.Timeout, customTimeout)
+	}
+}
+
+func TestWithHTTPClient(t *testing.T) {
+	customClient := &http.Client{
+		Timeout: 90 * time.Second,
+	}
+
+	client := NewClient("user", "pass", WithHTTPClient(customClient))
+
+	if client.httpClient != customClient {
+		t.Error("httpClient not set to custom client")
+	}
+
+	if client.httpClient.Timeout != 90*time.Second {
+		t.Errorf("httpClient.Timeout = %v, want 90s", client.httpClient.Timeout)
+	}
+}
+
+func TestMultipleOptions(t *testing.T) {
+	customURL := "https://test.api.url"
+	customTimeout := 45 * time.Second
+
+	client := NewClient("user", "pass",
+		WithBaseURL(customURL),
+		WithTimeout(customTimeout),
+	)
+
+	if client.baseURL != customURL {
+		t.Errorf("baseURL = %q, want %q", client.baseURL, customURL)
+	}
+
+	if client.httpClient.Timeout != customTimeout {
+		t.Errorf("httpClient.Timeout = %v, want %v", client.httpClient.Timeout, customTimeout)
+	}
+}
+
+func TestDefaultValues(t *testing.T) {
+	client := NewClient("user", "pass")
+
+	if client.baseURL != defaultBaseURL {
+		t.Errorf("baseURL = %q, want %q", client.baseURL, defaultBaseURL)
+	}
+
+	if client.httpClient.Timeout != defaultTimeout {
+		t.Errorf("httpClient.Timeout = %v, want %v", client.httpClient.Timeout, defaultTimeout)
+	}
+
+	expectedAPIKey := "user-pass"
+	if client.apiKey != expectedAPIKey {
+		t.Errorf("apiKey = %q, want %q", client.apiKey, expectedAPIKey)
+	}
+}
+
+func TestWithHTTPClient_PreservesCustomTransport(t *testing.T) {
+	customTransport := &http.Transport{
+		MaxIdleConns: 100,
+	}
+
+	customClient := &http.Client{
+		Timeout:   45 * time.Second,
+		Transport: customTransport,
+	}
+
+	client := NewClient("user", "pass", WithHTTPClient(customClient))
+
+	if client.httpClient.Transport != customTransport {
+		t.Error("Custom transport was not preserved")
+	}
+}
+
+func TestOptionsOrder(t *testing.T) {
+	// Test that options are applied in order
+	// First set timeout to 30s, then provide a custom client with 60s
+	customClient := &http.Client{
+		Timeout: 60 * time.Second,
+	}
+
+	client := NewClient("user", "pass",
+		WithTimeout(30*time.Second),
+		WithHTTPClient(customClient),
+	)
+
+	// The custom client should override the previous timeout setting
+	if client.httpClient.Timeout != 60*time.Second {
+		t.Errorf("httpClient.Timeout = %v, want 60s (custom client should override)", client.httpClient.Timeout)
+	}
+}
+
+func TestWithTimeout_OverridesDefault(t *testing.T) {
+	tests := []struct {
+		name    string
+		timeout time.Duration
+	}{
+		{"short timeout", 5 * time.Second},
+		{"long timeout", 120 * time.Second},
+		{"zero timeout", 0},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			client := NewClient("user", "pass", WithTimeout(tt.timeout))
+
+			if client.httpClient.Timeout != tt.timeout {
+				t.Errorf("httpClient.Timeout = %v, want %v", client.httpClient.Timeout, tt.timeout)
+			}
+		})
+	}
+}
+
+func TestWithBaseURL_VariousURLs(t *testing.T) {
+	tests := []struct {
+		name string
+		url  string
+	}{
+		{"production", "https://send.api.sendamatic.net"},
+		{"staging", "https://staging.api.sendamatic.net"},
+		{"local", "http://localhost:8080"},
+		{"custom port", "https://api.example.com:8443"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			client := NewClient("user", "pass", WithBaseURL(tt.url))
+
+			if client.baseURL != tt.url {
+				t.Errorf("baseURL = %q, want %q", client.baseURL, tt.url)
+			}
+		})
+	}
+}