2 files changed, 18 insertions, 5 deletions
diff --git a/testing/fx_string_testhelpers.cpp b/testing/fx_string_testhelpers.cpp
index 443cc89ed1..e2ce9353fb 100644
--- a/testing/fx_string_testhelpers.cpp
+++ b/testing/fx_string_testhelpers.cpp
@@ -16,3 +16,16 @@ std::ostream& operator<<(std::ostream& os, const CFX_DateTime& dt) {
      << std::to_string(dt.GetMillisecond());
   return os;
 }
+
+CFX_InvalidSeekableReadStream::CFX_InvalidSeekableReadStream(
+    FX_FILESIZE data_size)
+    : data_size_(data_size) {}
+
+CFX_InvalidSeekableReadStream::~CFX_InvalidSeekableReadStream() = default;
+
+CFX_BufferSeekableReadStream::CFX_BufferSeekableReadStream(
+    const unsigned char* src,
+    size_t src_size)
+    : data_(src), data_size_(src_size) {}
+
+CFX_BufferSeekableReadStream::~CFX_BufferSeekableReadStream() = default;
diff --git a/testing/fx_string_testhelpers.h b/testing/fx_string_testhelpers.h
index 5a269a3cf6..cb59cfbc03 100644
--- a/testing/fx_string_testhelpers.h
+++ b/testing/fx_string_testhelpers.h
@@ -25,10 +25,10 @@ class CFX_InvalidSeekableReadStream : public IFX_SeekableReadStream {
   FX_FILESIZE GetSize() override { return data_size_; }
 
  private:
-  explicit CFX_InvalidSeekableReadStream(FX_FILESIZE data_size)
-      : data_size_(data_size) {}
+  explicit CFX_InvalidSeekableReadStream(FX_FILESIZE data_size);
+  ~CFX_InvalidSeekableReadStream() override;
 
-  FX_FILESIZE data_size_;
+  const FX_FILESIZE data_size_;
 };
 
 class CFX_BufferSeekableReadStream : public IFX_SeekableReadStream {
@@ -55,8 +55,8 @@ class CFX_BufferSeekableReadStream : public IFX_SeekableReadStream {
   }
 
  private:
-  CFX_BufferSeekableReadStream(const unsigned char* src, size_t src_size)
-      : data_(src), data_size_(src_size) {}
+  CFX_BufferSeekableReadStream(const unsigned char* src, size_t src_size);
+  ~CFX_BufferSeekableReadStream() override;
 
   const unsigned char* data_;
   size_t data_size_;