Add mostly done M3UParser with basic unit tests.

Add lots of test infrastructure.

src/CMakeLists.txt

@@ -53,6 +53,7 @@ set(CLEMENTINE-SOURCES
     shortcutsdialog.cpp
     albumcovermanager.cpp
     albumcoverloader.cpp
+    m3uparser.cpp
 )
 
 # Header files that have Q_OBJECT in
@@ -99,6 +100,7 @@ set(CLEMENTINE-MOC-HEADERS
     shortcutsdialog.h
     albumcovermanager.h
     albumcoverloader.h
+    m3uparser.h
 )
 
 # UI files
@@ -148,6 +150,7 @@ include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
 
 include_directories("${CMAKE_CURRENT_SOURCE_DIR}/../3rdparty/qtsingleapplication")
 include_directories("${CMAKE_CURRENT_SOURCE_DIR}/../3rdparty/qxt")
+include_directories("${CMAKE_CURRENT_SOURCE_DIR}/../3rdparty/gtest/include")
 
 set(EXECUTABLE_OUTPUT_PATH ..)
 add_library(clementine_lib

src/m3uparser.cpp

@@ -0,0 +1,91 @@
+#include "m3uparser.h"
+
+#include <QtDebug>
+
+M3UParser::M3UParser(QIODevice* device, QDir directory, QObject* parent)
+    : QObject(parent),
+      device_(device),
+      type_(STANDARD),
+      directory_(directory) {
+}
+
+const QList<Song>& M3UParser::Parse() {
+  QString line = QString::fromLatin1(device_->readLine());
+  if (line == "#EXTM3U") {
+    // This is in extended M3U format.
+    type_ = EXTENDED;
+    line = QString::fromLatin1(device_->readLine());
+  }
+
+  do {
+    if (line.startsWith('#')) {
+      // Extended info or comment.
+      if (type_ == EXTENDED && line.startsWith("#EXT")) {
+        if (!ParseMetadata(line, &current_metadata_)) {
+          qWarning() << "Failed to parse metadata: " << line;
+        }
+      }
+    } else {
+      // Track location.
+      QUrl url;
+      if (!ParseTrackLocation(line, &url)) {
+        qWarning() << "Failed to parse location: " << line;
+      }
+    }
+    line = QString::fromLatin1(device_->readLine());
+  } while (device_->canReadLine());
+
+  return songs_;
+}
+
+bool M3UParser::ParseMetadata(QString line, M3UParser::Metadata* metadata) const {
+  // Extended info, eg.
+  // #EXTINF:123,Sample Artist - Sample title
+  QString info = line.section(':', 1);
+  QString l = info.section(',', 0, 0);
+  bool ok = false;
+  int length = l.toInt(&ok);
+  if (!ok) {
+    return false;
+  }
+  QString track_info = info.section(',', 1);
+  QStringList list = track_info.split('-');
+  if (list.size() <= 1) {
+    return false;
+  }
+  metadata->artist = list[0].trimmed();
+  metadata->title = list[1].trimmed();
+  metadata->length = length;
+  return true;
+}
+
+bool M3UParser::ParseTrackLocation(QString line, QUrl* url) const {
+  if (line.contains(QRegExp("^[a-z]+://"))) {
+    // Looks like a url.
+    QUrl temp(line);
+    if (temp.isValid()) {
+      *url = temp;
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  // Should be a local path.
+  if (line.contains(QRegExp("^([a-zA-Z]:\\)|(/)"))) {
+    // Absolute path.
+    // Fix windows \.
+    QString proper_path = line.replace('\\', '/');
+    if (!proper_path.startsWith('/')) {
+      proper_path.prepend("/");
+    }
+    *url = "file://" + proper_path;
+    return true;
+  } else {
+    // Relative path.
+    QString proper_path = line.replace('\\', '/');
+    QString absolute_path = directory_.absoluteFilePath(proper_path);
+    *url = "file://" + absolute_path;
+    return true;
+  }
+}

src/m3uparser.h

@@ -0,0 +1,49 @@
+#ifndef M3UPARSER_H
+#define M3UPARSER_H
+
+#include <QDir>
+#include <QObject>
+#include <QUrl>
+
+#include "gtest/gtest_prod.h"
+
+#include "song.h"
+
+class QIODevice;
+
+class M3UParser : public QObject {
+  Q_OBJECT
+ public:
+  M3UParser(QIODevice* device, QDir directory = QDir(), QObject* parent = 0);
+  virtual ~M3UParser() {}
+
+  const QList<Song>& Parse();
+
+  struct Metadata {
+    QString artist;
+    QString title;
+    int length;
+  };
+
+ private:
+  enum M3UType {
+    STANDARD = 0,
+    EXTENDED,  // Includes extended info (track, artist, etc.)
+    LINK       // Points to a directory.
+  };
+
+  bool ParseMetadata(QString line, Metadata* metadata) const;
+  bool ParseTrackLocation(QString line, QUrl* url) const;
+
+  FRIEND_TEST(M3UParserTest, ParsesMetadata);
+  FRIEND_TEST(M3UParserTest, ParsesTrackLocation);
+
+  QIODevice* device_;
+  M3UType type_;
+  QDir directory_;
+  Metadata current_metadata_;
+
+  QList<Song> songs_;
+};
+
+#endif  // M3UPARSER_H

tests/CMakeLists.txt

@@ -12,20 +12,27 @@ set(GTEST-SOURCES
     ../3rdparty/gtest/src/gtest-port.cc
     ../3rdparty/gtest/src/gtest-test-part.cc
     ../3rdparty/gtest/src/gtest-typed-test.cc
+    test_utils.cpp
 )
 
 add_library(gtest ${GTEST-SOURCES})
 
-
-set(SONGTEST-SOURCES
-    ../3rdparty/gtest/src/gtest_main.cc
-    ../src/song.cpp
-    song_test.cpp)
-
-add_executable(song_test ${SONGTEST-SOURCES})
-target_link_libraries(song_test clementine_lib gtest)
-
 add_custom_target(test
-    ./song_test
+    echo "Running tests"
     WORKING_DIRECTORY ${CURRENT_BINARY_DIR}
-    DEPENDS song_test)
+    DEPENDS song_test m3uparser_test)
+
+# Given a file foo_test.cpp, creates a target foo_test and adds it to the test target.
+macro(add_test_file test_source)
+    get_filename_component(TEST_NAME ${ARGV0} NAME_WE)
+    add_executable(${TEST_NAME}
+       ${ARGV0}
+       ../3rdparty/gtest/src/gtest_main.cc)
+    target_link_libraries(${TEST_NAME} clementine_lib gtest)
+    add_custom_command(TARGET test POST_BUILD
+        COMMAND ./${TEST_NAME})
+endmacro (add_test_file)
+
+
+add_test_file(m3uparser_test.cpp)
+add_test_file(song_test.cpp)

tests/m3uparser_test.cpp

@@ -0,0 +1,29 @@
+#include "gtest/gtest.h"
+#include "test_utils.h"
+
+#include "m3uparser.h"
+
+class M3UParserTest : public ::testing::Test {
+ protected:
+  M3UParserTest()
+      : parser_(NULL) {
+  }
+
+  M3UParser parser_;
+};
+
+TEST_F(M3UParserTest, ParsesMetadata) {
+  QString line("#EXTINF:123,Foo artist - Foo track");
+  M3UParser::Metadata metadata;
+  ASSERT_TRUE(parser_.ParseMetadata(line, &metadata));
+  EXPECT_EQ("Foo artist", metadata.artist.toStdString());
+  EXPECT_EQ("Foo track", metadata.title.toStdString());
+  EXPECT_EQ(123, metadata.length);
+}
+
+TEST_F(M3UParserTest, ParsesTrackLocation) {
+  QString line("/foo/bar.mp3");
+  QUrl url;
+  ASSERT_TRUE(parser_.ParseTrackLocation(line, &url));
+  EXPECT_EQ(QUrl("file:///foo/bar.mp3"), url);
+}

tests/song_test.cpp

@@ -3,10 +3,7 @@
 
 #include "gtest/gtest.h"
 
-std::ostream& operator<<(std::ostream& stream, const QString& str) {
-  stream << str.toStdString();
-  return stream;
-}
+#include "test_utils.h"
 
 namespace {
 

tests/test_utils.cpp

@@ -0,0 +1,15 @@
+#include "test_utils.h"
+
+#include <QString>
+#include <QUrl>
+
+std::ostream& operator<<(std::ostream& stream, const QString& str) {
+  stream << str.toStdString();
+  return stream;
+}
+
+std::ostream& operator <<(std::ostream& stream, const QUrl& url) {
+  stream << url.toString().toStdString();
+  return stream;
+}
+

tests/test_utils.h

@@ -0,0 +1,12 @@
+#ifndef TEST_UTILS_H
+#define TEST_UTILS_H
+
+#include <iostream>
+
+class QString;
+class QUrl;
+
+std::ostream& operator <<(std::ostream& stream, const QString& str);
+std::ostream& operator <<(std::ostream& stream, const QUrl& url);
+
+#endif  // TEST_UTILS_H