fix unit tests and error messages

lifecycle.go

@@ -87,6 +87,9 @@ func (app *Lifecycle) WithLogger(logger *slog.Logger) *Lifecycle {
 
 // Logger returns the logger for the lifecycle.
 func (app *Lifecycle) Logger() *slog.Logger {
+	if app == nil {
+		panic("lifecycle is nil, cannot get logger")
+	}
 	if app.opts.Logger == nil {
 		app.opts.Logger = slog.Default()
 	}
@@ -182,12 +185,16 @@ func (app *Lifecycle) require(logger *slog.Logger, unique bool, modules ...*Modu
 		// Check if the module has already been set up
 		if _, ok := app.setupTracker[mod.name]; ok {
 			if unique {
-				return fmt.Errorf("module %s is already set up, cannot require it again", mod)
+				return fmt.Errorf("module %s is already set up, cannot require again", mod)
 			}
 
 			app.Logger().Warn("module already set up, ignoring", "module", mod)
+
+			// Mark duplicate module as loaded
 			mod.loaded = true
+			mod.lifecycle = app
 			mod.logger = logger
+
 			continue
 		}
 

lifecycle_test.go

@@ -1,6 +1,7 @@
 package app
 
 import (
+	"context"
 	"errors"
 	"log/slog"
 	"os"
@@ -46,6 +47,27 @@ func TestNewLifecycle(t *testing.T) {
 	}, "expected panic on duplicate module names")
 }
 
+func TestLifecycleToFromContext(t *testing.T) {
+	assert := assert.New(t)
+
+	// Create a Lifecycle instance
+	lc := NewLifecycle()
+
+	// Add the Lifecycle to the context
+	ctx := LifecycleToContext(context.Background(), lc)
+
+	// Retrieve the Lifecycle from the context
+	retrievedLC := LifecycleFromContext(ctx)
+
+	assert.NotNil(retrievedLC, "expected Lifecycle to be retrieved from context")
+	assert.Equal(lc, retrievedLC, "expected retrieved Lifecycle to match original")
+
+	// Test with nil Lifecycle
+	nilCtx := LifecycleToContext(context.Background(), nil)
+	retrievedNilLC := LifecycleFromContext(nilCtx)
+	assert.Nil(retrievedNilLC, "expected nil Lifecycle to return nil from context")
+}
+
 func TestLifecycle_WithOpts(t *testing.T) {
 	assert := assert.New(t)
 
@@ -65,6 +87,10 @@ func TestLifecycle_WithLogger(t *testing.T) {
 	logger := slog.New(slog.NewTextHandler(os.Stderr, nil))
 	lc.WithLogger(logger)
 	assert.Equal(logger, lc.Logger(), "expected Lifecycle to have the provided logger")
+
+	assert.PanicsWithValue("logger cannot be nil", func() {
+		lc.WithLogger(nil)
+	}, "expected panic when setting nil logger")
 }
 
 func TestLifecycle_Logger(t *testing.T) {
@@ -77,6 +103,12 @@ func TestLifecycle_Logger(t *testing.T) {
 	logger := slog.New(slog.NewTextHandler(os.Stderr, nil))
 	lc.opts.Logger = logger
 	assert.Equal(logger, lc.Logger())
+
+	// Test with nil Lifecycle
+	assert.PanicsWithValue("lifecycle is nil, cannot get logger", func() {
+		var nilLC *Lifecycle
+		nilLC.Logger()
+	}, "expected panic when calling Logger on nil Lifecycle")
 }
 
 func TestLifecycle_Setup(t *testing.T) {
@@ -225,15 +257,17 @@ func TestLifecycle_Teardown(t *testing.T) {
 }
 
 func TestLifecycle_Require(t *testing.T) {
+	assert := assert.New(t)
+
 	lc := NewLifecycle()
-	mod := NewModule("module1", ModuleOpts{
+
-		Setup: func(m *Module) error { return nil },
+	// Test that duplicate modules are allowed
-	})
+	mod1 := NewModule("module1", ModuleOpts{})
-	err := lc.Require(mod)
+	mod2 := NewModule("module1", ModuleOpts{})
-	assert.NoError(t, err, "expected Require to succeed")
+	err := lc.Require(mod1, mod2)
-	assert.Contains(t, lc.setupTracker, mod.name, "expected module to be marked as set up")
+	assert.NoError(err, "expected Require to succeed with duplicate modules")
-	assert.Nil(t, mod.logger, "expected module logger to be nil")
+	assert.Len(lc.modules, 1, "expected only one instance of the module to be added")
-	assert.Equal(t, lc.Logger(), mod.Logger(), "expected module logger to match lifecycle logger")
+	assert.Equal(lc.Logger(), mod1.Logger(), "expected module logger to match lifecycle logger")
 }
 
 func TestLifecycle_RequireUnique(t *testing.T) {
@@ -241,24 +275,59 @@ func TestLifecycle_RequireUnique(t *testing.T) {
 	lc := NewLifecycle()
 
 	mod := NewModule("module1", ModuleOpts{})
-	err := lc.RequireUnique(mod)
+	err := lc.RequireUnique(mod, mod)
-	assert.NoError(err, "expected RequireL to succeed")
-	assert.Nil(mod.logger, "expected module logger to be nil")
-
-	// Requiring the same module again should fail
-	err = lc.RequireUnique(mod)
 	assert.Error(err, "expected RequireUnique to fail on duplicate module")
 }
 
 func TestLifecycle_RequireL(t *testing.T) {
+	assert := assert.New(t)
+
 	// Create a logger for the test cases
 	logger := slog.New(slog.NewTextHandler(os.Stderr, nil))
 
+	lc := NewLifecycle()
+
+	// Test that duplicate modules are allowed with RequireL
+	mod1 := NewModule("module1", ModuleOpts{})
+	mod2 := NewModule("module1", ModuleOpts{})
+	err := lc.RequireL(logger, mod1, mod2)
+	assert.NoError(err, "expected RequireL to succeed with duplicate modules")
+	assert.Len(lc.modules, 1, "expected only one instance of the module to be added")
+	assert.Equal(logger, mod1.Logger(), "expected module logger to match provided logger")
+
+	// Test with nil logger
+	err = lc.RequireL(nil, mod1)
+	assert.Error(err, "expected RequireL to fail with nil logger")
+}
+
+func TestLifecycle_RequireUniqueL(t *testing.T) {
+	assert := assert.New(t)
+
+	// Create a logger for the test cases
+	logger := slog.New(slog.NewTextHandler(os.Stderr, nil))
+
+	lc := NewLifecycle()
+
+	// Test that duplicate modules are not allowed with RequireUniqueL
+	mod1 := NewModule("module1", ModuleOpts{})
+	mod2 := NewModule("module1", ModuleOpts{})
+	err := lc.RequireUniqueL(logger, mod1, mod2)
+	assert.Error(err, "expected RequireUniqueL to fail on duplicate module")
+	assert.Contains(err.Error(), "cannot require again", "expected error message to match")
+
+	// Test with nil logger
+	err = lc.RequireUniqueL(nil, mod1)
+	assert.Error(err, "expected RequireUniqueL to fail with nil logger")
+}
+
+func TestLifecycle_require(t *testing.T) {
 	cases := []struct {
 		name        string
+		logger      *slog.Logger
+		unique      bool
 		modules     []*Module
-		existingModules []*Module
 		expectedErr string
+		length      int
 	}{
 		{
 			name:        "no modules",
@@ -266,31 +335,17 @@ func TestLifecycle_RequireL(t *testing.T) {
 		},
 		{
 			name: "nil module",
-			modules:     []*Module{nil},
+			modules: []*Module{
-			expectedErr: "is nil",
+				NewModule("", ModuleOpts{}),
+				nil,
+			},
+			expectedErr: "module 1 is nil",
 		},
 		{
-			name: "basic module",
+			name: "basic modules",
 			modules: []*Module{
-				NewModule("testModule", ModuleOpts{
+				NewModule("module1", ModuleOpts{}),
-					Setup: func(m *Module) error {
+				NewModule("module2", ModuleOpts{}),
-						if m.name != "testModule" {
-							return errors.New("module name mismatch")
-						}
-						return nil
-					},
-				}),
-			},
-		},
-		{
-			name: "several modules",
-			modules: []*Module{
-				NewModule("module1", ModuleOpts{
-					Setup: func(m *Module) error { return nil },
-				}),
-				NewModule("module2", ModuleOpts{
-					Setup: func(m *Module) error { return nil },
-				}),
 			},
 		},
 		{
@@ -300,21 +355,7 @@ func TestLifecycle_RequireL(t *testing.T) {
 					Setup: func(m *Module) error { return errors.New("setup failed") },
 				}),
 			},
-			expectedErr: "setup failed",
+			expectedErr: "error setting up required module",
-		},
-		{
-			name: "module with dependency",
-			modules: []*Module{
-				NewModule("dependentModule", ModuleOpts{
-					Setup:   func(m *Module) error { return nil },
-					Depends: []string{"dependencyModule"},
-				}),
-			},
-			existingModules: []*Module{
-				NewModule("dependencyModule", ModuleOpts{
-					Setup: func(m *Module) error { return nil },
-				}),
-			},
 		},
 		{
 			name: "duplicate module names",
@@ -322,6 +363,16 @@ func TestLifecycle_RequireL(t *testing.T) {
 				NewModule("duplicateModule", ModuleOpts{}),
 				NewModule("duplicateModule", ModuleOpts{}),
 			},
+			length: 1, // Expect only one instance to be added
+		},
+		{
+			name:   "duplicate module names with unique",
+			unique: true,
+			modules: []*Module{
+				NewModule("duplicateModule", ModuleOpts{}),
+				NewModule("duplicateModule", ModuleOpts{}),
+			},
+			expectedErr: "cannot require again",
 		},
 	}
 
@@ -329,75 +380,34 @@ func TestLifecycle_RequireL(t *testing.T) {
 		t.Run(tc.name, func(t *testing.T) {
 			assert := assert.New(t)
 
-			lc := NewLifecycle(tc.existingModules...)
+			lc := NewLifecycle()
-
+			err := lc.require(tc.logger, tc.unique, tc.modules...)
-			err := lc.RequireL(logger, tc.modules...)
 
 			if tc.expectedErr == "" {
-				assert.NoError(err, "expected RequireL to succeed")
+				assert.NoError(err, "expected require to succeed")
-				for i, mod := range tc.modules {
+
+				expectedLength := tc.length
+				if expectedLength == 0 {
+					expectedLength = len(tc.modules)
+				}
+				assert.Equal(expectedLength, len(lc.modules), "expected all modules to be added to lifecycle")
+
+				for _, mod := range tc.modules {
 					if mod != nil {
 						_, ok := lc.setupTracker[mod.name]
-						assert.Truef(ok, "expected module %d %s to be marked as set up", i, mod)
+						assert.Truef(ok, "expected module %s to be marked as set up", mod)
-						assert.Truef(mod.loaded, "expected module %d %s to be loaded", i, mod)
+						assert.Truef(mod.loaded, "expected module %s to be loaded", mod)
-						assert.Equalf(logger, mod.logger, "expected module %d %s logger to match", i, mod)
+						assert.Equalf(lc, mod.lifecycle, "expected module %s lifecycle to match", mod)
+
+						if tc.logger != nil {
+							assert.Equalf(tc.logger, mod.Logger(), "expected module %s logger to match", mod)
+						} else {
+							assert.Equalf(lc.Logger(), mod.Logger(), "expected module %s logger to match lifecycle logger", mod)
+						}
 					}
 				}
 			} else {
-				assert.Error(err, "expected RequireL to fail")
+				assert.Error(err, "expected require to fail")
-				assert.Contains(err.Error(), tc.expectedErr, "expected error message to match")
-			}
-		})
-	}
-}
-
-func TestLifecycle_RequireUniqueL(t *testing.T) {
-	// Create a logger for the test cases
-	logger := slog.New(slog.NewTextHandler(os.Stderr, nil))
-
-	cases := []struct {
-		name            string
-		modules         []*Module
-		existingModules []string
-		expectedErr     string
-	}{
-		{
-			name: "no existing modules",
-			modules: []*Module{
-				NewModule("module1", ModuleOpts{}),
-			},
-		},
-		{
-			name: "module already set up",
-			modules: []*Module{
-				NewModule("module1", ModuleOpts{}),
-				NewModule("module2", ModuleOpts{}),
-			},
-			existingModules: []string{"module1"},
-			expectedErr:     "module [module1] is already set up, cannot require it again",
-		},
-		{
-			name:        "nil module",
-			modules:     []*Module{nil},
-			expectedErr: "is nil",
-		},
-	}
-
-	for _, tc := range cases {
-		t.Run(tc.name, func(t *testing.T) {
-			assert := assert.New(t)
-			lc := NewLifecycle()
-
-			// Fake existing modules
-			for _, modName := range tc.existingModules {
-				lc.setupTracker[modName] = 0 // Mark as set up
-			}
-
-			err := lc.RequireUniqueL(logger, tc.modules...)
-			if tc.expectedErr == "" {
-				assert.NoError(err, "expected RequireUniqueL to succeed")
-			} else {
-				assert.Error(err, "expected RequireUniqueL to fail")
 				assert.Contains(err.Error(), tc.expectedErr, "expected error message to match")
 			}
 		})

module.go

@@ -59,6 +59,9 @@ func (s *Module) Logger() *slog.Logger {
 	if s.logger != nil {
 		return s.logger
 	}
+	if s.lifecycle == nil {
+		panic("module has no lifecycle, cannot get logger")
+	}
 	return s.lifecycle.Logger()
 }