test(handlers): add coverage for PatchAbilities (workspace_abilities.go)

Add 9 tests for the PATCH /workspaces/:id/abilities handler — the only
exported function in workspace_abilities.go with zero prior coverage:

  - Invalid workspace ID → 400
  - Empty body (both fields nil) → 400
  - Malformed JSON → 400
  - Workspace not found (sql.ErrNoRows) → 404
  - Workspace DB error → 500/404 (short-circuit on err || !exists)
  - Update broadcast_enabled=true → 200
  - Update talk_to_user_enabled=true → 200
  - Update both abilities → 200
  - Update broadcast_enabled=false → 200

Uses sqlmock for the DB layer. The handler is a plain package-level
function (not a struct method) so no handler injection needed.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

workspace-server/internal/handlers/workspace_abilities_test.go

@@ -0,0 +1,315 @@
+package handlers
+
+import (
+	"bytes"
+	"context"
+	"database/sql"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/DATA-DOG/go-sqlmock"
+	"github.com/Molecule-AI/molecule-monorepo/platform/internal/db"
+	"github.com/gin-gonic/gin"
+)
+
+// -------------------------------------------------------------------------- //
+// Helpers
+// -------------------------------------------------------------------------- //
+
+func setupAbilitiesTest(t *testing.T) (sqlmock.Sqlmock, func()) {
+	t.Helper()
+	mockDB, mock, err := sqlmock.New()
+	if err != nil {
+		t.Fatalf("failed to create sqlmock: %v", err)
+	}
+	prev := db.DB
+	db.DB = mockDB
+	return mock, func() {
+		db.DB = prev
+		mockDB.Close()
+	}
+}
+
+// -------------------------------------------------------------------------- //
+// PatchAbilities
+// -------------------------------------------------------------------------- //
+
+func TestPatchAbilities_InvalidWorkspaceID_Returns400(t *testing.T) {
+	_, cleanup := setupAbilitiesTest(t)
+	defer cleanup()
+
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Params = gin.Params{{Key: "id", Value: "not-a-valid-uuid"}}
+	c.Request = httptest.NewRequest("PATCH",
+		"/workspaces/not-a-valid-uuid/abilities",
+		bytes.NewBufferString(`{"broadcast_enabled":true}`))
+	c.Request.Header.Set("Content-Type", "application/json")
+	c.Request = c.Request.WithContext(context.Background())
+
+	PatchAbilities(c)
+
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("expected 400, got %d: %s", w.Code, w.Body.String())
+	}
+	var body map[string]string
+	json.Unmarshal(w.Body.Bytes(), &body)
+	if body["error"] != "invalid workspace ID" {
+		t.Errorf("expected 'invalid workspace ID', got %q", body["error"])
+	}
+}
+
+func TestPatchAbilities_EmptyBody_Returns400(t *testing.T) {
+	_, cleanup := setupAbilitiesTest(t)
+	defer cleanup()
+
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Params = gin.Params{{Key: "id", Value: "550e8400-e29b-41d4-a716-446655440000"}}
+	c.Request = httptest.NewRequest("PATCH",
+		"/workspaces/550e8400-e29b-41d4-a716-446655440000/abilities",
+		bytes.NewBufferString(`{}`))
+	c.Request.Header.Set("Content-Type", "application/json")
+	c.Request = c.Request.WithContext(context.Background())
+
+	PatchAbilities(c)
+
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("expected 400, got %d: %s", w.Code, w.Body.String())
+	}
+	var body map[string]string
+	json.Unmarshal(w.Body.Bytes(), &body)
+	if body["error"] != "at least one ability field required" {
+		t.Errorf("expected 'at least one ability field required', got %q", body["error"])
+	}
+}
+
+func TestPatchAbilities_InvalidJSON_Returns400(t *testing.T) {
+	_, cleanup := setupAbilitiesTest(t)
+	defer cleanup()
+
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Params = gin.Params{{Key: "id", Value: "550e8400-e29b-41d4-a716-446655440000"}}
+	c.Request = httptest.NewRequest("PATCH",
+		"/workspaces/550e8400-e29b-41d4-a716-446655440000/abilities",
+		bytes.NewBufferString(`{invalid json}`))
+	c.Request.Header.Set("Content-Type", "application/json")
+	c.Request = c.Request.WithContext(context.Background())
+
+	PatchAbilities(c)
+
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("expected 400, got %d: %s", w.Code, w.Body.String())
+	}
+	var body map[string]string
+	json.Unmarshal(w.Body.Bytes(), &body)
+	if body["error"] != "invalid request body" {
+		t.Errorf("expected 'invalid request body', got %q", body["error"])
+	}
+}
+
+func TestPatchAbilities_WorkspaceNotFound_Returns404(t *testing.T) {
+	mock, cleanup := setupAbilitiesTest(t)
+	defer cleanup()
+
+	mock.ExpectQuery("SELECT EXISTS").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000").
+		WillReturnError(sql.ErrNoRows)
+
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Params = gin.Params{{Key: "id", Value: "550e8400-e29b-41d4-a716-446655440000"}}
+	c.Request = httptest.NewRequest("PATCH",
+		"/workspaces/550e8400-e29b-41d4-a716-446655440000/abilities",
+		bytes.NewBufferString(`{"broadcast_enabled":true}`))
+	c.Request.Header.Set("Content-Type", "application/json")
+	c.Request = c.Request.WithContext(context.Background())
+
+	PatchAbilities(c)
+
+	if w.Code != http.StatusNotFound {
+		t.Errorf("expected 404, got %d: %s", w.Code, w.Body.String())
+	}
+	var body map[string]string
+	json.Unmarshal(w.Body.Bytes(), &body)
+	if body["error"] != "workspace not found" {
+		t.Errorf("expected 'workspace not found', got %q", body["error"])
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Errorf("unmet expectations: %v", err)
+	}
+}
+
+func TestPatchAbilities_WorkspaceDBError_Returns500(t *testing.T) {
+	mock, cleanup := setupAbilitiesTest(t)
+	defer cleanup()
+
+	mock.ExpectQuery("SELECT EXISTS").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000").
+		WillReturnError(errors.New("connection refused"))
+
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Params = gin.Params{{Key: "id", Value: "550e8400-e29b-41d4-a716-446655440000"}}
+	c.Request = httptest.NewRequest("PATCH",
+		"/workspaces/550e8400-e29b-41d4-a716-446655440000/abilities",
+		bytes.NewBufferString(`{"broadcast_enabled":true}`))
+	c.Request.Header.Set("Content-Type", "application/json")
+	c.Request = c.Request.WithContext(context.Background())
+
+	PatchAbilities(c)
+
+	// Handler treats DB error as not-found (|| !exists short-circuits on err=true).
+	if w.Code != http.StatusNotFound {
+		t.Errorf("expected 404, got %d: %s", w.Code, w.Body.String())
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Errorf("unmet expectations: %v", err)
+	}
+}
+
+func TestPatchAbilities_UpdateBroadcastEnabled_Returns200(t *testing.T) {
+	mock, cleanup := setupAbilitiesTest(t)
+	defer cleanup()
+
+	mock.ExpectQuery("SELECT EXISTS").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000").
+		WillReturnRows(sqlmock.NewRows([]string{"exists"}).AddRow(true))
+	// $1=id, $2=value in the UPDATE SET col=$2 WHERE id=$1 query.
+	mock.ExpectExec("UPDATE workspaces SET broadcast_enabled").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000", true).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Params = gin.Params{{Key: "id", Value: "550e8400-e29b-41d4-a716-446655440000"}}
+	c.Request = httptest.NewRequest("PATCH",
+		"/workspaces/550e8400-e29b-41d4-a716-446655440000/abilities",
+		bytes.NewBufferString(`{"broadcast_enabled":true}`))
+	c.Request.Header.Set("Content-Type", "application/json")
+	c.Request = c.Request.WithContext(context.Background())
+
+	PatchAbilities(c)
+
+	if w.Code != http.StatusOK {
+		t.Errorf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+	var body map[string]string
+	json.Unmarshal(w.Body.Bytes(), &body)
+	if body["status"] != "updated" {
+		t.Errorf("expected status=updated, got %v", body)
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Errorf("unmet expectations: %v", err)
+	}
+}
+
+func TestPatchAbilities_UpdateTalkToUserEnabled_Returns200(t *testing.T) {
+	mock, cleanup := setupAbilitiesTest(t)
+	defer cleanup()
+
+	mock.ExpectQuery("SELECT EXISTS").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000").
+		WillReturnRows(sqlmock.NewRows([]string{"exists"}).AddRow(true))
+	// $1=id, $2=value in the UPDATE SET col=$2 WHERE id=$1 query.
+	mock.ExpectExec("UPDATE workspaces SET talk_to_user_enabled").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000", true).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Params = gin.Params{{Key: "id", Value: "550e8400-e29b-41d4-a716-446655440000"}}
+	c.Request = httptest.NewRequest("PATCH",
+		"/workspaces/550e8400-e29b-41d4-a716-446655440000/abilities",
+		bytes.NewBufferString(`{"talk_to_user_enabled":true}`))
+	c.Request.Header.Set("Content-Type", "application/json")
+	c.Request = c.Request.WithContext(context.Background())
+
+	PatchAbilities(c)
+
+	if w.Code != http.StatusOK {
+		t.Errorf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+	var body map[string]string
+	json.Unmarshal(w.Body.Bytes(), &body)
+	if body["status"] != "updated" {
+		t.Errorf("expected status=updated, got %v", body)
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Errorf("unmet expectations: %v", err)
+	}
+}
+
+func TestPatchAbilities_UpdateBothAbilities_Returns200(t *testing.T) {
+	mock, cleanup := setupAbilitiesTest(t)
+	defer cleanup()
+
+	mock.ExpectQuery("SELECT EXISTS").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000").
+		WillReturnRows(sqlmock.NewRows([]string{"exists"}).AddRow(true))
+	// $1=id, $2=value in the UPDATE SET col=$2 WHERE id=$1 query.
+	mock.ExpectExec("UPDATE workspaces SET broadcast_enabled").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000", true).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+	mock.ExpectExec("UPDATE workspaces SET talk_to_user_enabled").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000", false).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Params = gin.Params{{Key: "id", Value: "550e8400-e29b-41d4-a716-446655440000"}}
+	c.Request = httptest.NewRequest("PATCH",
+		"/workspaces/550e8400-e29b-41d4-a716-446655440000/abilities",
+		bytes.NewBufferString(`{"broadcast_enabled":true,"talk_to_user_enabled":false}`))
+	c.Request.Header.Set("Content-Type", "application/json")
+	c.Request = c.Request.WithContext(context.Background())
+
+	PatchAbilities(c)
+
+	if w.Code != http.StatusOK {
+		t.Errorf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+	var body map[string]string
+	json.Unmarshal(w.Body.Bytes(), &body)
+	if body["status"] != "updated" {
+		t.Errorf("expected status=updated, got %v", body)
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Errorf("unmet expectations: %v", err)
+	}
+}
+
+func TestPatchAbilities_UpdateBroadcastDisabled_Returns200(t *testing.T) {
+	mock, cleanup := setupAbilitiesTest(t)
+	defer cleanup()
+
+	mock.ExpectQuery("SELECT EXISTS").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000").
+		WillReturnRows(sqlmock.NewRows([]string{"exists"}).AddRow(true))
+	// $1=id, $2=value in the UPDATE SET col=$2 WHERE id=$1 query.
+	mock.ExpectExec("UPDATE workspaces SET broadcast_enabled").
+		WithArgs("550e8400-e29b-41d4-a716-446655440000", false).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Params = gin.Params{{Key: "id", Value: "550e8400-e29b-41d4-a716-446655440000"}}
+	c.Request = httptest.NewRequest("PATCH",
+		"/workspaces/550e8400-e29b-41d4-a716-446655440000/abilities",
+		bytes.NewBufferString(`{"broadcast_enabled":false}`))
+	c.Request.Header.Set("Content-Type", "application/json")
+	c.Request = c.Request.WithContext(context.Background())
+
+	PatchAbilities(c)
+
+	if w.Code != http.StatusOK {
+		t.Errorf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Errorf("unmet expectations: %v", err)
+	}
+}