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unittest/Makefile.am

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+AUTOMAKE_OPTIONS = subdir-objects
+
+AM_CPPFLAGS += \
+    -DUSE_STD_NAMESPACE -DPANGO_ENABLE_ENGINE \
+    -I$(top_srcdir)/ccmain -I$(top_srcdir)/api \
+    -I$(top_srcdir)/ccutil -I$(top_srcdir)/ccstruct \
+    -I$(top_srcdir)/lstm -I$(top_srcdir)/arch \
+    -I$(top_srcdir)/viewer \
+    -I$(top_srcdir)/textord -I$(top_srcdir)/dict \
+    -I$(top_srcdir)/classify -I$(top_srcdir)/display \
+    -I$(top_srcdir)/wordrec -I$(top_srcdir)/cutil
+
+# Build googletest:
+check_LTLIBRARIES = libgtest.la libgtest_main.la
+libgtest_la_SOURCES = ../googletest/googletest/src/gtest-all.cc
+libgtest_la_CPPFLAGS = -I$(top_srcdir)/googletest/googletest/include -I$(top_srcdir)/googletest/googletest -pthread 
+libgtest_main_la_SOURCES = ../googletest/googletest/src/gtest_main.cc
+## libgtest_main_la_LIBADD = libgtest.la
+
+# Build unittests
+GTEST_LIBS =  libgtest.la libgtest_main.la
+AM_CPPFLAGS +=   -isystem $(top_srcdir)/googletest/googletest/include  
+
+check_PROGRAMS = \
+  apiexample_test \
+  tesseracttests \
+  matrix_test
+
+TESTS = $(check_PROGRAMS)
+
+#List of source files needed to build the executable:
+
+tesseracttests_SOURCES = ../tests/tesseracttests.cpp
+tesseracttests_LDADD = $(GTEST_LIBS)
+
+matrix_test_SOURCES = matrix_test.cc
+matrix_test_LDADD = $(GTEST_LIBS)
+
+apiexample_test_SOURCES = apiexample_test.cc
+#apiexample_test_LDFLAGS = -static
+apiexample_test_LDFLAGS = $(OPENCL_LDFLAGS)
+
+if USING_MULTIPLELIBS
+apiexample_test_LDADD = \
+    $(top_srcdir)/ccutil/libtesseract_ccutil.la \
+    $(top_srcdir)/ccstruct/libtesseract_ccstruct.la
+else
+apiexample_test_LDADD = \
+    $(top_srcdir)/api/libtesseract.la
+endif
+
+apiexample_test_LDADD += $(LEPTONICA_LIBS)
+apiexample_test_LDADD += $(GTEST_LIBS)
+
+# for windows
+if T_WIN
+apiexample_test_LDADD += -lws2_32
+matrix_test_LDADD += -lws2_32
+tesseracttests_LDADD  += -lws2_32
+
+AM_CPPFLAGS += -I$(top_srcdir)/vs2010/port
+endif

unittest/apiexample_test.cc

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+///////////////////////////////////////////////////////////////////////
+// File:        apiexample.cpp
+// Description: Api Example for Tesseract.
+// Author:      ShreeDevi Kumar
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+///////////////////////////////////////////////////////////////////////
+#include "gtest/gtest.h"
+#include "tesseract/baseapi.h"
+#include "leptonica/allheaders.h"
+#include <iostream>
+#include <string>
+#include <fstream>
+#include <locale>
+
+TEST(TesseractTest, ApiExample) 
+{
+    const char* imagefile = "../testing/phototest.tif";
+    const char* groundtruth = "testfiles/phototest.txt";
+    char *outText;
+    std::locale loc("en_US.UTF-8"); 
+    std::ifstream file(groundtruth);
+    file.imbue(loc); 
+    std::string gtText((std::istreambuf_iterator<char>(file)),
+             std::istreambuf_iterator<char>());
+    tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
+    if (api->Init(NULL, "eng")) {
+        fprintf(stderr, "Could not initialize tesseract.\n");
+        exit(1);
+    }
+    Pix *image = pixRead(imagefile);
+    api->SetImage(image);
+    api->SetPageSegMode(tesseract::PSM_AUTO_OSD);
+    outText = api->GetUTF8Text();
+    ASSERT_EQ(gtText,outText) << "Phototest.tif with default values OCR does not match ground truth";
+    api->End();
+    delete [] outText;
+    pixDestroy(&image);
+}
+
+int main(int argc, char **argv) {
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}