Fix tests modifying test fixture files by using temporary directories

Previously, running tests would modify test/config/Users/guest.yaml and create
test/config/Users/test-user.yaml due to the automatic migration logic in
YAMLAccountManager. This caused git diff to show changes after running tests.

Solution:
- Modified TestNewYAMLAccountManager to use t.TempDir() for test isolation
- Added copyTestFiles helper to copy test fixtures to temporary directory
- Tests now run against copies, leaving original fixtures untouched

This ensures tests are properly isolated and don't have side effects on the
repository's test fixture files.

1 files changed, 55 insertions, 76 deletions

diff --git a/internal/mobius/account_manager_test.go b/internal/mobius/account_manager_test.go
index fe834a4..a6f39ca 100644
--- a/internal/mobius/account_manager_test.go
+++ b/internal/mobius/account_manager_test.go
@@ -1,89 +1,68 @@
 package mobius
 
 import (
-	"fmt"
+	"os"
+	"path"
 	"github.com/jhalter/mobius/hotline"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"testing"
 )
 
-func TestNewYAMLAccountManager(t *testing.T) {
-	type args struct {
-		accountDir string
-	}
-	tests := []struct {
-		name    string
-		args    args
-		want    *YAMLAccountManager
-		wantErr assert.ErrorAssertionFunc
-	}{
-		{
-			name: "loads accounts from a directory",
-			args: args{
-				accountDir: "test/config/Users",
-			},
-			want: &YAMLAccountManager{
-				accountDir: "test/config/Users",
-				accounts: map[string]hotline.Account{
-					"admin": {
-						Name:     "admin",
-						Login:    "admin",
-						Password: "$2a$04$2itGEYx8C1N5bsfRSoC9JuonS3I4YfnyVPZHLSwp7kEInRX0yoB.a",
-						Access:   hotline.AccessBitmap{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00},
-					},
-					"Test User Name": {
-						Name:     "test-user",
-						Login:    "Test User Name",
-						Password: "$2a$04$9P/jgLn1fR9TjSoWL.rKxuN6g.1TSpf2o6Hw.aaRuBwrWIJNwsKkS",
-						Access:   hotline.AccessBitmap{0x7d, 0xf0, 0x0c, 0xef, 0xab, 0x80, 0x00, 0x00},
-					},
-					"guest": {
-						Name:     "guest",
-						Login:    "guest",
-						Password: "$2a$04$6Yq/TIlgjSD.FbARwtYs9ODnkHawonu1TJ5W2jJKfhnHwBIQTk./y",
-						Access:   hotline.AccessBitmap{0x7d, 0xf0, 0x0c, 0xef, 0xab, 0x80, 0x00, 0x00},
-					},
-				},
-			},
-			wantErr: assert.NoError,
-		},
+// copyTestFiles copies test config files to a temporary directory
+func copyTestFiles(t *testing.T, srcDir, dstDir string) {
+	files := []string{"admin.yaml", "guest.yaml", "user-with-old-access-format.yaml"}
+	
+	for _, file := range files {
+		srcPath := path.Join(srcDir, file)
+		dstPath := path.Join(dstDir, file)
+		
+		data, err := os.ReadFile(srcPath)
+		require.NoError(t, err, "Failed to read %s", srcPath)
+		
+		err = os.WriteFile(dstPath, data, 0644)
+		require.NoError(t, err, "Failed to write %s", dstPath)
 	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			got, err := NewYAMLAccountManager(tt.args.accountDir)
-			if !tt.wantErr(t, err, fmt.Sprintf("NewYAMLAccountManager(%v)", tt.args.accountDir)) {
-				return
-			}
+}
 
-			assert.Equal(t,
-				&hotline.Account{
-					Name:     "admin",
-					Login:    "admin",
-					Password: "$2a$04$2itGEYx8C1N5bsfRSoC9JuonS3I4YfnyVPZHLSwp7kEInRX0yoB.a",
-					Access:   hotline.AccessBitmap{0xff, 0xff, 0xef, 0xff, 0xff, 0x80, 0x00, 0x00},
-				},
-				got.Get("admin"),
-			)
+func TestNewYAMLAccountManager(t *testing.T) {
+	t.Run("loads accounts from a directory", func(t *testing.T) {
+		// Create temporary directory and copy test files
+		tempDir := t.TempDir()
+		copyTestFiles(t, "test/config/Users", tempDir)
+		
+		// Use temp directory instead of original test directory
+		got, err := NewYAMLAccountManager(tempDir)
+		require.NoError(t, err)
 
-			assert.Equal(t,
-				&hotline.Account{
-					Login:    "guest",
-					Name:     "guest",
-					Password: "$2a$04$6Yq/TIlgjSD.FbARwtYs9ODnkHawonu1TJ5W2jJKfhnHwBIQTk./y",
-					Access:   hotline.AccessBitmap{0x60, 0x70, 0x0c, 0x20, 0x03, 0x80, 0x00, 0x00},
-				},
-				got.Get("guest"),
-			)
+		assert.Equal(t,
+			&hotline.Account{
+				Name:     "admin",
+				Login:    "admin",
+				Password: "$2a$04$2itGEYx8C1N5bsfRSoC9JuonS3I4YfnyVPZHLSwp7kEInRX0yoB.a",
+				Access:   hotline.AccessBitmap{0xff, 0xff, 0xef, 0xff, 0xff, 0x80, 0x00, 0x00},
+			},
+			got.Get("admin"),
+		)
 
-			assert.Equal(t,
-				&hotline.Account{
-					Login:    "test-user",
-					Name:     "Test User Name",
-					Password: "$2a$04$9P/jgLn1fR9TjSoWL.rKxuN6g.1TSpf2o6Hw.aaRuBwrWIJNwsKkS",
-					Access:   hotline.AccessBitmap{0x7d, 0xf0, 0x0c, 0xef, 0xab, 0x80, 0x00, 0x00},
-				},
-				got.Get("test-user"),
-			)
-		})
-	}
+		assert.Equal(t,
+			&hotline.Account{
+				Login:    "guest",
+				Name:     "guest",
+				Password: "$2a$04$6Yq/TIlgjSD.FbARwtYs9ODnkHawonu1TJ5W2jJKfhnHwBIQTk./y",
+				Access:   hotline.AccessBitmap{0x60, 0x70, 0x0c, 0x20, 0x03, 0x80, 0x00, 0x00},
+			},
+			got.Get("guest"),
+		)
+
+		assert.Equal(t,
+			&hotline.Account{
+				Login:    "test-user",
+				Name:     "Test User Name",
+				Password: "$2a$04$9P/jgLn1fR9TjSoWL.rKxuN6g.1TSpf2o6Hw.aaRuBwrWIJNwsKkS",
+				Access:   hotline.AccessBitmap{0x7d, 0xf0, 0x0c, 0xef, 0xab, 0x80, 0x00, 0x00},
+			},
+			got.Get("test-user"),
+		)
+	})
 }