First commit

vendor/github.com/tdewolff/parse/buffer/writer_test.go

@@ -0,0 +1,46 @@
+package buffer // import "github.com/tdewolff/parse/buffer"
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/tdewolff/test"
+)
+
+func TestWriter(t *testing.T) {
+	w := NewWriter(make([]byte, 0, 3))
+
+	test.That(t, w.Len() == 0, "buffer must initially have zero length")
+
+	n, _ := w.Write([]byte("abc"))
+	test.That(t, n == 3, "first write must write 3 characters")
+	test.Bytes(t, w.Bytes(), []byte("abc"), "first write must match 'abc'")
+	test.That(t, w.Len() == 3, "buffer must have length 3 after first write")
+
+	n, _ = w.Write([]byte("def"))
+	test.That(t, n == 3, "second write must write 3 characters")
+	test.Bytes(t, w.Bytes(), []byte("abcdef"), "second write must match 'abcdef'")
+
+	w.Reset()
+	test.Bytes(t, w.Bytes(), []byte(""), "reset must match ''")
+
+	n, _ = w.Write([]byte("ghijkl"))
+	test.That(t, n == 6, "third write must write 6 characters")
+	test.Bytes(t, w.Bytes(), []byte("ghijkl"), "third write must match 'ghijkl'")
+}
+
+func ExampleNewWriter() {
+	w := NewWriter(make([]byte, 0, 11)) // initial buffer length is 11
+	w.Write([]byte("Lorem ipsum"))
+	fmt.Println(string(w.Bytes()))
+	// Output: Lorem ipsum
+}
+
+func ExampleWriter_Reset() {
+	w := NewWriter(make([]byte, 0, 11))                 // initial buffer length is 10
+	w.Write([]byte("garbage that will be overwritten")) // does reallocation
+	w.Reset()
+	w.Write([]byte("Lorem ipsum"))
+	fmt.Println(string(w.Bytes()))
+	// Output: Lorem ipsum
+}