package windows

import (
	"errors"
	"testing"
)

func TestEnvironmentOverlayIsCaseInsensitiveAndDeterministic_HP_WINENV_01(t *testing.T) {
	t.Parallel()
	base := map[string]string{"Path": `C:\Windows`, "TEMP": `C:\Temp`, "=C:": `C:\Windows`}
	overrides := map[string]string{"PATH": `C:\Pinned`, "Name": "rvbox"}
	entries, err := MergeEnvironment(base, overrides)
	if err != nil {
		t.Fatal(err)
	}
	if len(entries) != 4 || entries[0].Folded != "=C:" || entries[1].Folded != "NAME" || entries[2].Folded != "PATH" || entries[2].Value != `C:\Pinned` {
		t.Fatalf("merged entries = %#v", entries)
	}
	block, err := BuildEnvironmentBlock(base, overrides)
	if err != nil || len(block) == 0 || block[len(block)-1] != 0 || block[len(block)-2] != 0 {
		t.Fatalf("environment block = len=%d err=%v", len(block), err)
	}
}

func TestEnvironmentOverlayRejectsMalformedAndDuplicateBase_BH_WINENV_01(t *testing.T) {
	t.Parallel()
	if _, err := MergeEnvironment(map[string]string{"Path": "one", "PATH": "two"}, nil); !errors.Is(err, ErrDuplicateEnvironmentKey) {
		t.Fatalf("duplicate base error = %v", err)
	}
	if _, err := MergeEnvironment(nil, map[string]string{"BAD=KEY": "value"}); !errors.Is(err, ErrInvalidEnvironmentKey) {
		t.Fatalf("invalid override key error = %v", err)
	}
	if _, err := MergeEnvironment(nil, map[string]string{"NUL": "bad\x00value"}); !errors.Is(err, ErrInvalidEnvironmentValue) {
		t.Fatalf("invalid override value error = %v", err)
	}
}