fix(schema): skip testcontainers tests when Docker is unavailable

Add runtime Docker availability check (docker info) before attempting
to create testcontainers. This prevents test failures on macOS CI
runners that don't have Docker installed, without requiring -short flag.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 2 people

pkg/schema/mysql/loader_test.go

@@ -18,6 +18,7 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
+	"os/exec"
 	"testing"
 	"time"
 
@@ -28,11 +29,23 @@ import (
 	myschema "github.com/ajitpratap0/GoSQLX/pkg/schema/mysql"
 )
 
+// isDockerAvailable checks whether the Docker daemon is reachable.
+// Returns false on macOS CI runners that have no Docker installed.
+func isDockerAvailable() bool {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	cmd := exec.CommandContext(ctx, "docker", "info")
+	return cmd.Run() == nil
+}
+
 func startMySQL(t *testing.T) *sql.DB {
 	t.Helper()
 	if testing.Short() {
 		t.Skip("skipping testcontainers test in -short mode")
 	}
+	if !isDockerAvailable() {
+		t.Skip("Docker not available, skipping integration test")
+	}
 	ctx := context.Background()
 	req := testcontainers.ContainerRequest{
 		Image:        "mysql:8.0",

pkg/schema/postgres/loader_test.go

@@ -18,6 +18,7 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
+	"os/exec"
 	"testing"
 	"time"
 
@@ -28,11 +29,23 @@ import (
 	pgschema "github.com/ajitpratap0/GoSQLX/pkg/schema/postgres"
 )
 
+// isDockerAvailable checks whether the Docker daemon is reachable.
+// Returns false on macOS CI runners that have no Docker installed.
+func isDockerAvailable() bool {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	cmd := exec.CommandContext(ctx, "docker", "info")
+	return cmd.Run() == nil
+}
+
 func startPostgres(t *testing.T) *sql.DB {
 	t.Helper()
 	if testing.Short() {
 		t.Skip("skipping testcontainers test in -short mode")
 	}
+	if !isDockerAvailable() {
+		t.Skip("Docker not available, skipping integration test")
+	}
 	ctx := context.Background()
 	req := testcontainers.ContainerRequest{
 		Image:        "postgres:16-alpine",