test: Added tests for the GCP Secret Manager provider

tests/providers/gcp_secret_manager_tests.rs

@@ -0,0 +1,74 @@
+use gman::config::{Config, ProviderConfig};
+use gman::providers::gcp_secret_manager::GcpSecretManagerProvider;
+use gman::providers::{SecretProvider, SupportedProvider};
+use pretty_assertions::{assert_eq, assert_str_eq};
+use validator::Validate;
+
+#[test]
+fn test_gcp_provider_name() {
+    let provider = GcpSecretManagerProvider {
+        gcp_project_id: Some("my-project".into()),
+    };
+    assert_str_eq!(provider.name(), "GcpSecretManagerProvider");
+}
+
+#[test]
+fn test_gcp_provider_validation_ok() {
+    let provider = GcpSecretManagerProvider {
+        gcp_project_id: Some("demo-project".into()),
+    };
+    assert!(provider.validate().is_ok());
+}
+
+#[test]
+fn test_gcp_provider_missing_project() {
+    let provider = GcpSecretManagerProvider { gcp_project_id: None };
+    assert!(provider.validate().is_err());
+}
+
+#[test]
+fn test_supported_provider_display_and_validate() {
+    let sp = SupportedProvider::GcpSecretManager {
+        provider_def: GcpSecretManagerProvider {
+            gcp_project_id: Some("prod-123".into()),
+        },
+    };
+    // Validate delegates to inner provider
+    assert!(sp.validate().is_ok());
+    // Display string for this variant
+    assert_eq!(sp.to_string(), "gcp_secret_manager");
+}
+
+#[test]
+fn test_provider_config_with_gcp_deserialize_and_extract() {
+    // Minimal ProviderConfig YAML using the gcp_secret_manager variant
+    let yaml = r#"---
+name: gcp
+type: gcp_secret_manager
+gcp_project_id: my-project
+"#;
+
+    let pc: ProviderConfig = serde_yaml::from_str(yaml).expect("valid provider config yaml");
+    assert!(pc.validate().is_ok());
+
+    let mut pc_owned = pc.clone();
+    let provider: &mut dyn SecretProvider = pc_owned.extract_provider();
+    assert_eq!(provider.name(), "GcpSecretManagerProvider");
+
+    // Round-trip through Config with default_provider
+    let cfg_yaml = r#"---
+default_provider: gcp
+providers:
+  - name: gcp
+    type: gcp_secret_manager
+    gcp_project_id: my-project
+"#;
+    let cfg: Config = serde_yaml::from_str(cfg_yaml).expect("valid config yaml");
+    assert!(cfg.validate().is_ok());
+
+    let extracted = cfg
+        .extract_provider_config(None)
+        .expect("should find default provider");
+    assert_eq!(extracted.name.as_deref(), Some("gcp"));
+}
+

tests/providers/mod.rs

@@ -1,3 +1,4 @@
 mod aws_secrets_manager_tests;
+mod gcp_secret_manager_tests;
 mod local_tests;
 mod provider_tests;