file: add `ReadFile`

3 files changed, 33 insertions, 0 deletions

diff --git a/file/file.go b/file/file.go
index 4267b10..9bb974d 100644
--- a/file/file.go
+++ b/file/file.go
@@ -24,6 +24,16 @@ func Read(f *os.File) ([]byte, error) {
 	return bs, nil
 }
 
+func ReadFile(path string) ([]byte, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return []byte{}, err
+	}
+	defer f.Close()
+
+	return Read(f)
+}
+
 func Write(f *os.File, content []byte) error {
 	n, err := f.Write(content)
 	if n != len(content) {
diff --git a/file/file_test.go b/file/file_test.go
new file mode 100644
index 0000000..143b072
--- /dev/null
+++ b/file/file_test.go
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: ISC
+// Copyright © 2022 siddharth <s@ricketyspace.net>
+
+package file
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestReadFile(t *testing.T) {
+	expectedBS := []byte("42 is the answer.\n")
+	bs, err := ReadFile("testdata/life.txt")
+	if err != nil {
+		t.Errorf("read file: %v", err)
+		return
+	}
+	if !bytes.Equal(bs, expectedBS) {
+		t.Errorf("read content: '%s' != '%s'", bs, expectedBS)
+		return
+	}
+}
diff --git a/file/testdata/life.txt b/file/testdata/life.txt
new file mode 100644
index 0000000..c1b8e71
--- /dev/null
+++ b/file/testdata/life.txt
@@ -0,0 +1 @@
+42 is the answer.