Add unit tests for Searcher and Reader

Even though we will be removing the wrappers soon, the test coverage
should be complete and we could simply remove these files later.

test/meson.build

@@ -9,6 +9,8 @@ tests = [
     'book',
     'manager',
     'opds_catalog',
+    'reader',
+    'searcher'
 ]
 
 if build_machine.system() != 'windows'

test/reader.cpp

@@ -0,0 +1,62 @@
+
+#include "gtest/gtest.h"
+#include "../include/reader.h"
+#include "zim/archive.h"
+
+namespace kiwix
+{
+  /**
+   * This test file is written primarily to demonstrate how Reader is simply a
+   * wrapper over an archive. We will be dropping this wrapper soon.
+   **/
+  TEST (Reader, archiveWrapper) {
+    Reader reader("./test/zimfile.zim");
+    zim::Archive archive = *reader.getZimArchive();
+
+    std::ostringstream s;
+    s << archive.getUuid();
+
+    ASSERT_EQ(reader.getId(), s.str());
+    ASSERT_EQ(reader.getGlobalCount(), archive.getEntryCount());
+    ASSERT_EQ(reader.getMainPage().getTitle(), archive.getMainEntry().getTitle());
+    ASSERT_EQ(reader.hasFulltextIndex(), archive.hasFulltextIndex());
+    ASSERT_NO_THROW(reader.getRandomPage());
+  }
+
+  TEST (Reader, getFunctions) {
+    zim::Archive archive("./test/zimfile.zim");
+    Reader reader("./test/zimfile.zim");
+
+    auto archiveEntry = archive.getRandomEntry();
+    ASSERT_TRUE(reader.pathExists(archiveEntry.getPath()));
+    auto readerEntry = reader.getEntryFromPath(archiveEntry.getPath());
+    ASSERT_EQ(readerEntry.getTitle(), archiveEntry.getTitle());
+
+    ASSERT_FALSE(reader.pathExists("invalidEntryPath"));
+    ASSERT_THROW(reader.getEntryFromPath("invalidEntryPath"), NoEntry);
+
+    readerEntry = reader.getEntryFromTitle(archiveEntry.getTitle());
+    ASSERT_EQ(readerEntry.getTitle(), archiveEntry.getTitle());
+  }
+
+  TEST (Reader, suggestions) {
+    Reader reader("./test/zimfile.zim");
+    SuggestionsList_t suggestions;
+    reader.searchSuggestionsSmart("The Genius", 4, suggestions);
+
+    std::vector<std::string> suggestionResult, expectedResult;
+    std::string suggestionTitle;
+    for (auto it = suggestions.begin(); it != suggestions.end(); it++) {
+      suggestionResult.push_back(it->getTitle());
+    }
+
+    expectedResult = {
+      "The Genius After Hours",
+      "The Genius Hits the Road",
+      "The Genius Sings the Blues",
+      "The Genius of Ray Charles"
+    };
+
+    ASSERT_EQ(suggestionResult, expectedResult);
+  }
+}

test/searcher.cpp

@@ -0,0 +1,25 @@
+#include "gtest/gtest.h"
+#include "../include/searcher.h"
+#include "../include/reader.h"
+
+namespace kiwix
+{
+
+TEST(Searcher, search) {
+	Reader reader("./test/example.zim");
+
+	Searcher searcher;
+	searcher.add_reader(&reader);
+	ASSERT_EQ(searcher.get_reader(0)->getTitle(), reader.getTitle());
+
+	searcher.search("wiki", 0, 2);
+	searcher.restart_search();
+	ASSERT_EQ(searcher.getEstimatedResultCount(), (unsigned int)2);
+
+	auto result = searcher.getNextResult();
+	ASSERT_EQ(result->get_title(), "FreedomBox for Communities/Offline Wikipedia - Wikibooks, open books for an open world");
+	result = searcher.getNextResult();
+	ASSERT_EQ(result->get_title(), "Wikibooks");
+}
+
+}