refactor: implement mocking functions and tests

pipx_test.go

@@ -0,0 +1,45 @@
+// pipx_test.go
+package main
+
+import (
+	"os/exec"
+	"testing"
+)
+
+func TestPipxManager_Name(t *testing.T) {
+	pm := &PipxManager{}
+	if name := pm.Name(); name != "Pipx" {
+		t.Errorf("Expected name to be 'Pipx', got %s", name)
+	}
+}
+
+func TestPipxManager_InstallManager(t *testing.T) {
+	pm := &PipxManager{}
+
+	// Mock exec.LookPath
+	execLookPath = func(file string) (string, error) {
+		if file == "pipx" {
+			return "/usr/bin/pipx", nil
+		}
+		return "", exec.ErrNotFound
+	}
+	defer func() { execLookPath = exec.LookPath }()
+
+	if err := pm.InstallManager(); err != nil {
+		t.Errorf("Expected no error, got %v", err)
+	}
+}
+
+func TestPipxManager_InstallPackage(t *testing.T) {
+	pm := &PipxManager{}
+
+	// Mock exec.Command
+	execCommand = func(name string, arg ...string) *exec.Cmd {
+		return exec.Command("echo", "mocked pipx install")
+	}
+	defer func() { execCommand = exec.Command }()
+
+	if err := pm.InstallPackage("test-package"); err != nil {
+		t.Errorf("Expected no error, got %v", err)
+	}
+}