test: Add proxy e2e test (#348)

* test: Add proxy e2e test

* fix: Code review fixes

* test: Add dependency cooldown skip list test case

test/proxye2e/confirm.go

@@ -0,0 +1,65 @@
+package proxye2e
+
+import (
+	"sync"
+
+	"github.com/safedep/pmg/analyzer"
+	"github.com/safedep/pmg/guard"
+)
+
+// ConfirmController drives the suspicious-package confirmation prompt. The
+// default policy denies, matching PMG's safe default for an unhandled prompt.
+type ConfirmController struct {
+	mu      sync.Mutex
+	policy  func([]*analyzer.PackageVersionAnalysisResult) (bool, error)
+	prompts [][]string
+}
+
+func newConfirmController() *ConfirmController {
+	return &ConfirmController{policy: func([]*analyzer.PackageVersionAnalysisResult) (bool, error) { return false, nil }}
+}
+
+func (c *ConfirmController) AutoApprove() {
+	c.setPolicy(func([]*analyzer.PackageVersionAnalysisResult) (bool, error) { return true, nil })
+}
+
+func (c *ConfirmController) AutoDeny() {
+	c.setPolicy(func([]*analyzer.PackageVersionAnalysisResult) (bool, error) { return false, nil })
+}
+
+func (c *ConfirmController) Func(fn func([]*analyzer.PackageVersionAnalysisResult) (bool, error)) {
+	c.setPolicy(fn)
+}
+
+func (c *ConfirmController) setPolicy(fn func([]*analyzer.PackageVersionAnalysisResult) (bool, error)) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.policy = fn
+}
+
+// Prompts returns the package names presented for confirmation, one entry per prompt.
+func (c *ConfirmController) Prompts() [][]string {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	out := make([][]string, len(c.prompts))
+	copy(out, c.prompts)
+	return out
+}
+
+func (c *ConfirmController) interaction() *guard.PackageManagerGuardInteraction {
+	return &guard.PackageManagerGuardInteraction{
+		GetConfirmationOnMalware: func(pkgs []*analyzer.PackageVersionAnalysisResult) (bool, error) {
+			names := make([]string, 0, len(pkgs))
+			for _, p := range pkgs {
+				names = append(names, p.PackageVersion.GetPackage().GetName())
+			}
+
+			c.mu.Lock()
+			c.prompts = append(c.prompts, names)
+			policy := c.policy
+			c.mu.Unlock()
+
+			return policy(pkgs)
+		},
+	}
+}