tests: split example_filesystems into its own package

Running these tests from integration_tests' TestMain() was awkward
because they were run twice with unchanged settings.
integration_tests tests everything with OpenSSL and with native
Go crypto, but this does not take affect for the example filesystems.

To make this work, test_helpers is also split into its own package.

1 files changed, 131 insertions, 0 deletions

diff --git a/tests/integration_tests/performance_test.go b/tests/integration_tests/performance_test.go
new file mode 100644
index 0000000..67f0b28
--- /dev/null
+++ b/tests/integration_tests/performance_test.go
@@ -0,0 +1,131 @@
+package integration_tests
+
+// Benchmarks
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/rfjakob/gocryptfs/tests/test_helpers"
+)
+
+func BenchmarkStreamWrite(t *testing.B) {
+	buf := make([]byte, 1024*1024)
+	t.SetBytes(int64(len(buf)))
+
+	file, err := os.Create(test_helpers.DefaultPlainDir + "BenchmarkWrite")
+	if err != nil {
+		t.FailNow()
+	}
+
+	t.ResetTimer()
+	var i int
+	for i = 0; i < t.N; i++ {
+		written, err := file.Write(buf)
+		if err != nil {
+			fmt.Printf("err=\"%s\", written=%d\n", err.Error(), written)
+			t.FailNow()
+		}
+	}
+	file.Close()
+}
+
+func BenchmarkStreamRead(t *testing.B) {
+	buf := make([]byte, 1024*1024)
+	t.SetBytes(int64(len(buf)))
+
+	fn := test_helpers.DefaultPlainDir + "BenchmarkWrite"
+	fi, err := os.Stat(fn)
+	if err != nil {
+		t.Fatal(err)
+	}
+	mb := int(fi.Size() / 1024 / 1024)
+
+	if t.N > mb {
+		// Grow file so we can satisfy the test
+		//fmt.Printf("Growing file to %d MB... ", t.N)
+		var f2 *os.File
+		f2, err = os.OpenFile(fn, os.O_WRONLY|os.O_APPEND, 0666)
+		if err != nil {
+			fmt.Println(err)
+			t.FailNow()
+		}
+		for h := 0; h < t.N-mb; h++ {
+			_, err = f2.Write(buf)
+			if err != nil {
+				fmt.Println(err)
+				t.FailNow()
+			}
+		}
+		f2.Close()
+	}
+
+	file, err := os.Open(fn)
+	if err != nil {
+		t.FailNow()
+	}
+	t.ResetTimer()
+	var i int
+	for i = 0; i < t.N; i++ {
+		_, err := file.Read(buf)
+		if err == io.EOF {
+			fmt.Println("Test file too small")
+			t.SkipNow()
+		} else if err != nil {
+			fmt.Println(err)
+			t.FailNow()
+		}
+	}
+	file.Close()
+}
+
+// createFiles - create "count" files of size "size" bytes each
+func createFiles(t *testing.B, count int, size int) {
+	dir := fmt.Sprintf("%s/createFiles_%d_%d", test_helpers.DefaultPlainDir, count, size)
+	err := os.Mkdir(dir, 0777)
+	if err != nil {
+		t.Fatal(err)
+	}
+	buf := make([]byte, size)
+	t.SetBytes(int64(len(buf)))
+	t.ResetTimer()
+	var i int
+	for i = 0; i < count; i++ {
+		file := fmt.Sprintf("%s/%d", dir, i)
+		if size > 0 {
+			err = ioutil.WriteFile(file, buf, 0666)
+		} else {
+			var fh *os.File
+			fh, err = os.Create(file)
+			fh.Close()
+		}
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+	t.StopTimer()
+	os.RemoveAll(dir)
+}
+
+func BenchmarkCreate0B(t *testing.B) {
+	createFiles(t, t.N, 0)
+}
+
+func BenchmarkCreate1B(t *testing.B) {
+	createFiles(t, t.N, 1)
+}
+
+func BenchmarkCreate100B(t *testing.B) {
+	createFiles(t, t.N, 100)
+}
+
+func BenchmarkCreate4kB(t *testing.B) {
+	createFiles(t, t.N, 4*1024)
+}
+
+func BenchmarkCreate10kB(t *testing.B) {
+	createFiles(t, t.N, 10*1024)
+}