Configure iPhone Git commit identity (#76)

crates/storage/tests/config_contract.rs

@@ -7,6 +7,7 @@ use ironstorage::{
     authentication::{DEFAULT_AUTHENTICATION_TIMEOUT, MAX_AUTHENTICATION_TIMEOUT},
     config::{ConfigError, ConfigLoader, EditorSource},
     desktop::DesktopStorage,
+    git::GitIdentity,
     mobile::MobileTab,
     repository::EntryPath,
 };
@@ -98,6 +99,38 @@ fn explicit_relative_configuration_resolves_deterministically() -> TestResult {
     Ok(())
 }
 
+#[test]
+fn git_commit_identity_defaults_validates_and_persists() -> TestResult {
+    let fixture = ConfigurationFixture::new()?;
+    fixture.write_explicit(fixture.valid_contents())?;
+    let config = fixture.loader().load(Some(&fixture.explicit_path()))?;
+    assert_eq!(config.git_identity(), &GitIdentity::ironstorage());
+
+    let identity = GitIdentity::new("Alice Example", "alice@example.test")?;
+    config.update_git_identity(&identity)?;
+    let reloaded = fixture.loader().load(Some(&fixture.explicit_path()))?;
+    assert_eq!(reloaded.git_identity(), &identity);
+    assert_eq!(reloaded.git_remotes(), config.git_remotes());
+    let contents = fs::read_to_string(fixture.explicit_path())?;
+    assert!(contents.contains("user_name = \"Alice Example\""));
+    assert!(contents.contains("user_email = \"alice@example.test\""));
+
+    fixture.write_explicit(&fixture.valid_contents().replace(
+        "[[git.remotes]]",
+        "[git]\nuser_name = \"Alice Example\"\n\n[[git.remotes]]",
+    ))?;
+    assert_eq!(
+        fixture
+            .loader()
+            .load(Some(&fixture.explicit_path()))
+            .expect_err("partial Git identity must be rejected"),
+        ConfigError::InvalidField {
+            field: "git.user_identity"
+        }
+    );
+    Ok(())
+}
+
 #[test]
 fn watch_totp_selection_persists_only_in_application_configuration() -> TestResult {
     let fixture = ConfigurationFixture::new()?;