Added a header to hold the file generation code for unit testing purposes.

test/unit/UnitTestFileGenerator.h

@@ -0,0 +1,76 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2017, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+#pragma once
+
+#include <cstdio>
+#include <cstdlib>
+#include <gtest/gtest.h>
+
+#if defined(__GNUC__) || defined(__clang__)
+#define TMP_PATH "/tmp/"
+inline FILE* MakeTmpFilePath(char* tmplate)
+{
+    auto fd = mkstemp(tmplate);
+    EXPECT_NE(-1, fd);
+    if(fd == -1)
+    {
+        return nullptr;
+    }
+    auto fs = fdopen(fd, "w+");
+    EXPECT_NE(nullptr, fs);
+    return fs;
+}
+#elif defined(_MSC_VER)
+#include <io.h>
+#define TMP_PATH "./"
+inline FILE* MakeTmpFilePath(char* tmplate)
+{
+    auto pathtemplate = _mktemp(tmplate);
+    EXPECT_NE(pathtemplate, nullptr);
+    if(pathtemplate == nullptr)
+    {
+        return nullptr;
+    }
+    auto* fs = std::fopen(pathtemplate, "w+");
+    EXPECT_NE(fs, nullptr);
+    return fs;
+}
+#endif

test/unit/utDefaultIOStream.cpp

@@ -39,6 +39,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 -------------------------------------------------------------------------*/
 #include <gtest/gtest.h>
 #include "TestIOStream.h"
+#include "UnitTestFileGenerator.h"
 #include <cstdio>
 #include <cstdlib>
 #include <string>
@@ -49,37 +50,6 @@ class utDefaultIOStream : public ::testing::Test {
     // empty
 };
 
-#if defined(__GNUC__) || defined(__clang__)
-#define TMP_PATH "/tmp/"
-FILE* MakeTmpFilePath(char* tmplate)
-{
-    auto fd = mkstemp(tmplate);
-    EXPECT_NE(-1, fd);
-    if(fd == -1)
-    {
-        return nullptr;
-    }
-    auto fs = fdopen(fd, "w+");
-    EXPECT_NE(nullptr, fs);
-    return fs;
-}
-#elif defined(_MSC_VER)
-#include <io.h>
-#define TMP_PATH "./"
-FILE* MakeTmpFilePath(char* tmplate)
-{
-    auto pathtemplate = _mktemp(tmplate);
-    EXPECT_NE(pathtemplate, nullptr);
-    if(pathtemplate == nullptr)
-    {
-        return nullptr;
-    }
-    auto* fs = std::fopen(pathtemplate, "w+");
-    EXPECT_NE(fs, nullptr);
-    return fs;
-}
-#endif
-
 const char data[]{"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Qui\
 sque luctus sem diam, ut eleifend arcu auctor eu. Vestibulum id est vel nulla l\
 obortis malesuada ut sed turpis. Nulla a volutpat tortor. Nunc vestibulum portt\