Centralize Go validation and build environments

internal/process/process_test.go

@@ -58,6 +58,24 @@ func TestRunPreservesExitError(t *testing.T) {
 	}
 }
 
+func TestRunCanRemoveInheritedEnvironment(t *testing.T) {
+	t.Setenv("RELEASEKIT_PROCESS_INHERITED", "inherited")
+	var stdout bytes.Buffer
+	err := Run(context.Background(), Invocation{
+		Args:     []string{helperExecutable(t), "-test.run=TestProcessHelper", "--", "argument", "success"},
+		Env:      map[string]string{"RELEASEKIT_PROCESS_HELPER": "1"},
+		UnsetEnv: []string{"RELEASEKIT_PROCESS_INHERITED"},
+		Stdout:   &stdout,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := fmt.Sprintf("%s|argument||", mustGetwd(t))
+	if stdout.String() != want {
+		t.Fatalf("stdout = %q, want %q", stdout.String(), want)
+	}
+}
+
 func TestRunReportsMissingExecutable(t *testing.T) {
 	err := Run(context.Background(), Invocation{Args: []string{"releasekit-command-that-does-not-exist"}})
 	if err == nil || !strings.Contains(err.Error(), "releasekit-command-that-does-not-exist") {
@@ -143,3 +161,12 @@ func helperExecutable(t *testing.T) string {
 	}
 	return executable
 }
+
+func mustGetwd(t *testing.T) string {
+	t.Helper()
+	workdir, err := os.Getwd()
+	if err != nil {
+		t.Fatal(err)
+	}
+	return workdir
+}