Function TestCopyFrom

pkg/gitdiff/io_test.go:171–208

(t *testing.T)

}

func TestCopyFrom(t *testing.T) {
	tests := map[string]struct {
		Bytes  int64
		Offset int64
	}{
		"copyAll": {
			Bytes: byteBufferSize / 2,
		},
		"copyPartial": {
			Bytes:  byteBufferSize / 2,
			Offset: byteBufferSize / 4,
		},
		"copyLarge": {
			Bytes: 8 * byteBufferSize,
		},
	}

	for name, test := range tests {
		t.Run(name, func(t *testing.T) {
			data := make([]byte, test.Bytes)
			rand.Read(data)

			var dst bytes.Buffer
			n, err := copyFrom(&dst, bytes.NewReader(data), test.Offset)
			if err != nil {
				t.Fatalf("unexpected error copying data: %v", err)
			}
			if n != test.Bytes-test.Offset {
				t.Fatalf("incorrect number of bytes copied: expected %d, actual %d", test.Bytes-test.Offset, n)
			}

			expected := data[test.Offset:]
			if !bytes.Equal(expected, dst.Bytes()) {
				t.Fatalf("incorrect data copied:\nexpected: %v\nactual: %v", expected, dst.Bytes())
			}
		})
	}
}

func TestCopyLinesFrom(t *testing.T) {
	tests := map[string]struct {