test: make "missing path" assertions hermetic

internal/testutil/paths.go

@@ -0,0 +1,21 @@
+// Package testutil provides small helpers shared by aict's tool test suites.
+package testutil
+
+import (
+	"path/filepath"
+	"testing"
+)
+
+// MissingPath returns an absolute path, ending in name, that is guaranteed not
+// to exist for the duration of the test.
+//
+// Tests must not hardcode paths such as "/nonexistent/file.txt". On Windows
+// that resolves to an ordinary, creatable location (C:\nonexistent\file.txt)
+// which may genuinely exist on a developer's machine — silently inverting the
+// assertion, so a "missing path" test starts exercising a real file instead.
+// Anchoring to t.TempDir() gives a directory the test framework created empty
+// and removes on cleanup, so name is reliably absent on every platform.
+func MissingPath(t *testing.T, name string) string {
+	t.Helper()
+	return filepath.Join(t.TempDir(), name)
+}

tools/awk/awk_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func createFile(t *testing.T, dir, name, content string) string {
@@ -131,7 +133,7 @@ func TestAwk_NR(t *testing.T) {
 }
 
 func TestAwk_MissingFile(t *testing.T) {
-	result := runAwk(t, []string{"{print $1}", "/nonexistent/file.txt"})
+	result := runAwk(t, []string{"{print $1}", testutil.MissingPath(t, "file.txt")})
 	if len(result.Errors) == 0 {
 		t.Error("expected error for non-existent file")
 	}

tools/cat/cat_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func createFile(t *testing.T, dir, name, content string) string {
@@ -109,7 +111,7 @@ func TestCat_Directory(t *testing.T) {
 }
 
 func TestCat_Missing(t *testing.T) {
-	result, err := catFile("/nonexistent/missing.txt", Config{})
+	result, err := catFile(testutil.MissingPath(t, "missing.txt"), Config{})
 	if err != nil {
 		t.Fatal(err)
 	}

tools/checksums/checksums_test.go

@@ -14,6 +14,7 @@ import (
 	"testing"
 
 	pathutil "github.com/synseqack/aict/internal/path"
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func runChecksums(args []string) (string, error) {
@@ -80,7 +81,7 @@ func TestChecksums_NonExistent(t *testing.T) {
 	os.Setenv("AICT_XML", "1")
 	defer os.Unsetenv("AICT_XML")
 
-	output, err := runChecksums([]string{"/nonexistent/file.txt"})
+	output, err := runChecksums([]string{testutil.MissingPath(t, "file.txt")})
 	if err != nil {
 		t.Fatal(err)
 	}

tools/diff/diff_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func createFile(t *testing.T, dir, name, content string) string {
@@ -127,7 +129,7 @@ func TestDiff_MissingFile(t *testing.T) {
 	dir := t.TempDir()
 	existing := createFile(t, dir, "a.txt", "hello\n")
 
-	result := runDiff(t, []string{existing, "/nonexistent/missing.txt"})
+	result := runDiff(t, []string{existing, testutil.MissingPath(t, "missing.txt")})
 	if len(result.Errors) == 0 {
 		t.Error("expected error for missing file")
 	}

tools/du/du_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func runDu(args []string) (string, error) {
@@ -156,7 +158,7 @@ func TestDu_NonExistent(t *testing.T) {
 	r, w, _ := os.Pipe()
 	os.Stdout = w
 
-	err := Run([]string{"/nonexistent/path"})
+	err := Run([]string{testutil.MissingPath(t, "path")})
 
 	w.Close()
 	os.Stdout = oldStdout

tools/file/file_test.go

@@ -7,6 +7,8 @@ import (
 	"path/filepath"
 	"runtime"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func runFile(args []string) (string, error) {
@@ -156,7 +158,7 @@ func TestFile_Executable(t *testing.T) {
 }
 
 func TestFile_NonExistent(t *testing.T) {
-	result, err := runFileWithOutput("/nonexistent/path/file.txt", Config{XML: true})
+	result, err := runFileWithOutput(testutil.MissingPath(t, "file.txt"), Config{XML: true})
 	if err != nil {
 		t.Fatal(err)
 	}

tools/find/find_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func createFile(t *testing.T, dir, name, content string) string {
@@ -147,7 +149,7 @@ func TestFind_Invert(t *testing.T) {
 }
 
 func TestFind_Missing(t *testing.T) {
-	result := runFind(t, []string{"/nonexistent/directory"})
+	result := runFind(t, []string{testutil.MissingPath(t, "directory")})
 	if len(result.Errors) == 0 {
 		t.Error("expected error for non-existent root")
 	}

tools/head/head_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func runHead(args []string) (string, error) {
@@ -124,7 +126,7 @@ func TestHead_EmptyFile(t *testing.T) {
 }
 
 func TestHead_NonExistent(t *testing.T) {
-	result, err := runHeadWithOutput("/nonexistent/file.txt", Config{XML: true})
+	result, err := runHeadWithOutput(testutil.MissingPath(t, "file.txt"), Config{XML: true})
 	if err != nil {
 		t.Fatal(err)
 	}

tools/ls/ls_test.go

@@ -9,6 +9,8 @@ import (
 	"strings"
 	"testing"
 	"time"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func runLS(args []string) (string, error) {
@@ -171,7 +173,7 @@ func TestLS_Symlinks(t *testing.T) {
 }
 
 func TestLS_Error_NonExistent(t *testing.T) {
-	result, err := runLSWithOutput([]string{"/nonexistent/path/that/does/not/exist"}, Config{XML: true})
+	result, err := runLSWithOutput([]string{testutil.MissingPath(t, "does-not-exist")}, Config{XML: true})
 	if err != nil {
 		t.Fatal(err)
 	}

tools/realpath/realpath_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func runRealpath(args []string) (string, error) {
@@ -64,7 +66,7 @@ func TestRealpath_Directory(t *testing.T) {
 }
 
 func TestRealpath_NonExistent(t *testing.T) {
-	result, err := runRealpathWithOutput("/nonexistent/path/file.txt")
+	result, err := runRealpathWithOutput(testutil.MissingPath(t, "file.txt"))
 	if err != nil {
 		t.Fatal(err)
 	}

tools/sed/sed_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func createFile(t *testing.T, dir, name, content string) string {
@@ -167,7 +169,7 @@ func TestSed_RegexAddress(t *testing.T) {
 }
 
 func TestSed_MissingFile(t *testing.T) {
-	result := runSed(t, []string{"-e", "s/a/b/", "/nonexistent/file.txt"})
+	result := runSed(t, []string{"-e", "s/a/b/", testutil.MissingPath(t, "file.txt")})
 	if len(result.Errors) == 0 {
 		t.Error("expected error for non-existent file")
 	}

tools/stat/stat_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func createFile(t *testing.T, dir, name, content string) string {
@@ -98,7 +100,7 @@ func TestStat_FollowSymlink(t *testing.T) {
 }
 
 func TestStat_Missing(t *testing.T) {
-	result, err := statPath("/nonexistent/missing.txt", Config{})
+	result, err := statPath(testutil.MissingPath(t, "missing.txt"), Config{})
 	if err != nil {
 		t.Fatal(err)
 	}

tools/tail/tail_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func runTail(args []string) (string, error) {
@@ -118,7 +120,7 @@ func TestTail_EmptyFile(t *testing.T) {
 }
 
 func TestTail_NonExistent(t *testing.T) {
-	result, err := runTailWithOutput("/nonexistent/file.txt", Config{XML: true})
+	result, err := runTailWithOutput(testutil.MissingPath(t, "file.txt"), Config{XML: true})
 	if err != nil {
 		t.Fatal(err)
 	}

tools/tar/tar_test.go

@@ -8,6 +8,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func createTar(t *testing.T, dir, name string, files map[string]string) string {
@@ -122,7 +124,7 @@ func TestTar_FileTypes(t *testing.T) {
 }
 
 func TestTar_NonExistent(t *testing.T) {
-	result := runTar(t, []string{"/nonexistent/archive.tar"})
+	result := runTar(t, []string{testutil.MissingPath(t, "archive.tar")})
 	if len(result.Errors) == 0 {
 		t.Error("expected error for non-existent archive")
 	}

tools/wc/wc_test.go

@@ -6,6 +6,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/synseqack/aict/internal/testutil"
 )
 
 func createFile(t *testing.T, dir, name, content string) string {
@@ -141,7 +143,7 @@ func TestWC_Directory(t *testing.T) {
 }
 
 func TestWC_Missing(t *testing.T) {
-	result, err := runWC([]string{"/nonexistent/file.txt"}, Config{Lines: true, Words: true, Bytes: true})
+	result, err := runWC([]string{testutil.MissingPath(t, "file.txt")}, Config{Lines: true, Words: true, Bytes: true})
 	if err != nil {
 		t.Fatal(err)
 	}