{"id":384,"date":"2017-05-28T22:05:48","date_gmt":"2017-05-28T20:05:48","guid":{"rendered":"http:\/\/antek.atthost24.pl\/?p=384"},"modified":"2017-05-29T13:16:00","modified_gmt":"2017-05-29T11:16:00","slug":"przetestujmy-skutecznosc-algorytmu-czesc-pierwsza","status":"publish","type":"post","link":"https:\/\/blog.lantkowiak.pl\/index.php\/2017\/05\/28\/przetestujmy-skutecznosc-algorytmu-czesc-pierwsza\/","title":{"rendered":"Przetestujmy skuteczno\u015b\u0107 algorytmu – cz\u0119\u015b\u0107 pierwsza!"},"content":{"rendered":"

Dzisiaj zajmiemy si\u0119 przetestowaniem naszego algorytmu do wykrywania plagiat\u00f3w w praktyce. Miejmy nadziej\u0119, \u017ce to chocia\u017c troch\u0119 zadzia\u0142a \ud83d\ude09<\/p>\n

Zestaw testowy<\/h3>\n

Musimy najpierw zacz\u0105\u0107 od przygotowania danych, na kt\u00f3rych b\u0119dziemy testowa\u0107 nasz\u0105 aplikacje.<\/p>\n

Dzisiaj przygotujemy specjalnie spreparowane kody \u017ar\u00f3d\u0142owe i zobaczymy jak z nimi poradzi sobie nasza aplikacja.<\/p>\n

Zacznijmy od stworzenia naszej wyj\u015bciowej klasy, kt\u00f3ra b\u0119dzie zawiera\u0142a kilka p\u00f3l oraz metod.<\/p>\n

public class ManyMethods {\r\n\tprivate int a;\r\n\tprivate int b;\r\n\tprivate double c;\r\n\tprivate double d;\r\n\tprivate String e;\r\n\tprivate String f;\r\n\t\r\n\tpublic ManyMethods() {\r\n\t\ta = 4;\r\n\t\tb = 1;\r\n\t\tc = -1.43;\r\n\t\td = 9.12;\r\n\t\te = \"test\";\r\n\t\tf = \"asdasd\";\r\n\t}\r\n\t\r\n\tpublic void firstMethod() {\r\n\t\ta = a + b;\t\t\r\n\t}\r\n\t\r\n\tpublic void secondMethod() {\r\n\t\ta = a* a* a* a* a *a \/ 2*a;\r\n\t\tb = (int) (b + a -8 + 9 * c);\r\n\t}\r\n\t\r\n\tpublic void thridMethod() {\r\n\t\tc *= 123.432;\r\n\t\te += \"Asddsa\";\r\n\t}\r\n\t\r\n\tpublic void fourthMethod() {\r\n\t\tStringBuilder stringBuilder = new StringBuilder();\r\n\t\tstringBuilder.append(\"raz\");\r\n\t\tstringBuilder.append(f);\r\n\t\tstringBuilder.append(\"dwa\");\r\n\t\tf = stringBuilder.toString();\r\n\t}\r\n\t\r\n\tpublic void fifthMethod() {\r\n\t\te = e + \"asd \" + a + b+ c+ d+ e+ f;\r\n\t}\r\n\t\r\n\tpublic static void main(String[] args) {\r\n\t\tManyMethods manyMethods = new ManyMethods();\r\n\t\tmanyMethods.firstMethod();\r\n\t\tmanyMethods.secondMethod();\r\n\t\tmanyMethods.thridMethod();\r\n\t\tmanyMethods.fourthMethod();\r\n\t\tmanyMethods.fifthMethod();\r\n\t}\r\n}<\/pre>\n
B\u0119dzie to nasz wyj\u015bciowy kod, od kt\u00f3rego b\u0119dziemy robi\u0107 wszystkie modyfikacje.<\/p>\n
Wykonajmy nast\u0119puj\u0105ce modyfikacje kodu:<\/p>\n
    \n
  1. Zmie\u0144my nazwy metod i p\u00f3l\n
    public class ManyMethodsDifferentNames {\r\n\tprivate int firstIntegerVariable;\r\n\tprivate int secondIntegerVariable;\r\n\tprivate double firstDoubleVariable;\r\n\tprivate double secondDoubleVariable;\r\n\tprivate String firstStringVariable;\r\n\tprivate String secondStringVariable;\r\n\t\r\n\tpublic ManyMethodsDifferentNames() {\r\n\t\tfirstIntegerVariable = 4;\r\n\t\tsecondIntegerVariable = 1;\r\n\t\tfirstDoubleVariable = -1.43;\r\n\t\tsecondDoubleVariable = 9.12;\r\n\t\tfirstStringVariable = \"test\";\r\n\t\tsecondStringVariable = \"asdasd\";\r\n\t}\r\n\t\r\n\tpublic void doSomeActionOne() {\r\n\t\tfirstIntegerVariable = firstIntegerVariable + secondIntegerVariable;\t\t\r\n\t}\r\n\t\r\n\tpublic void doSomeActionTwo() {\r\n\t\tfirstIntegerVariable = firstIntegerVariable* firstIntegerVariable* firstIntegerVariable* firstIntegerVariable* firstIntegerVariable *firstIntegerVariable \/ 2*firstIntegerVariable;\r\n\t\tsecondIntegerVariable = (int) (secondIntegerVariable + firstIntegerVariable -8 + 9 * firstDoubleVariable);\r\n\t}\r\n\t\r\n\tpublic void doSomeActionThird() {\r\n\t\tfirstDoubleVariable *= 123.432;\r\n\t\tfirstStringVariable += \"Asddsa\";\r\n\t}\r\n\t\r\n\tpublic void doSomeActionFour() {\r\n\t\tStringBuilder stringBuilder = new StringBuilder();\r\n\t\tstringBuilder.append(\"raz\");\r\n\t\tstringBuilder.append(secondStringVariable);\r\n\t\tstringBuilder.append(\"dwa\");\r\n\t\tsecondStringVariable = stringBuilder.toString();\r\n\t}\r\n\t\r\n\tpublic void doSomeActionFive() {\r\n\t\tfirstStringVariable = firstStringVariable + \"asd \" + firstIntegerVariable + secondIntegerVariable+ firstDoubleVariable+ secondDoubleVariable+ firstStringVariable+ secondStringVariable;\r\n\t}\r\n\t\r\n\tpublic static void main(String[] args) {\r\n\t\tManyMethodsDifferentNames manyMethods = new ManyMethodsDifferentNames();\r\n\t\tmanyMethods.doSomeActionOne();\r\n\t\tmanyMethods.doSomeActionTwo();\r\n\t\tmanyMethods.doSomeActionThird();\r\n\t\tmanyMethods.doSomeActionFour();\r\n\t\tmanyMethods.doSomeActionFive();\r\n\t}\r\n}<\/pre>\n<\/li>\n
  2. Przenie\u015bmy operacje z metod do metody main, a same metody usu\u0144my\n
    public class ManyMethodsIncluded {\r\n\tprivate static int a;\r\n\tprivate static int b;\r\n\tprivate static double c;\r\n\tprivate static double d;\r\n\tprivate static String e;\r\n\tprivate static String f;\r\n\t\r\n\tpublic static void main(String[] args) {\r\n\t\ta = 4;\r\n\t\tb = 1;\r\n\t\tc = -1.43;\r\n\t\td = 9.12;\r\n\t\te = \"test\";\r\n\t\tf = \"asdasd\";\r\n\t\ta = a + b;\t\t\r\n\t\ta = a* a* a* a* a *a \/ 2*a;\r\n\t\tb = (int) (b + a -8 + 9 * c);\r\n\t\tc *= 123.432;\r\n\t\te += \"Asddsa\";\r\n\t\tStringBuilder stringBuilder = new StringBuilder();\r\n\t\tstringBuilder.append(\"raz\");\r\n\t\tstringBuilder.append(f);\r\n\t\tstringBuilder.append(\"dwa\");\r\n\t\tf = stringBuilder.toString();\r\n\t\te = e + \"asd \" + a + b+ c+ d+ e+ f;\r\n\t}\r\n}<\/pre>\n<\/li>\n
  3. Dodajmy kilka nieu\u017cywanych metod\n
    public class ManyMethodsUnnecessaryStaff {\r\n\tprivate int a;\r\n\tprivate int b;\r\n\tprivate double c;\r\n\tprivate double d;\r\n\tprivate String e;\r\n\tprivate String f;\r\n\t\r\n\tpublic void stupidMethodOne() {\r\n\t\tf = \"asd sa dsa\" + \" dsad sad sa\" + f + \"dsa dsa \";\r\n\t\te += \"dsadsa dsa dsa + dsad sa \" + \" dsad sadsa\";\r\n\t}\r\n\t\r\n\tpublic ManyMethodsUnnecessaryStaff() {\r\n\t\ta = 4;\r\n\t\tb = 1;\r\n\t\tc = -1.43;\r\n\t\td = 9.12;\r\n\t\te = \"test\";\r\n\t\tf = \"asdasd\";\r\n\t}\r\n\t\r\n\tpublic void stupidMethodTwo() {\r\n\t\ta = Math.abs(-123213213*3*5);\r\n\t\tb += 3* b + a + c;\r\n\t}\r\n\t\r\n\tpublic void firstMethod() {\r\n\t\ta = a + b;\t\t\r\n\t}\r\n\t\r\n\tpublic void stupidMethodThree() {\r\n\t\tc = 123.543534\/42.543*423.123+65.2;\r\n\t\td = Math.sqrt(c + d);\r\n\t}\r\n\t\r\n\tpublic void secondMethod() {\r\n\t\ta = a* a* a* a* a *a \/ 2*a;\r\n\t\tb = (int) (b + a -8 + 9 * c);\r\n\t}\r\n\t\r\n\tpublic void stupidMethodFour() {\r\n\t\te = \"olelele\";\r\n\t\ttry {\r\n\t\t\tThread.sleep(200);\r\n\t\t}\r\n\t\tcatch(Exception e) {\r\n\t\t\tf = \"hahah\";\r\n\t\t}\r\n\t}\r\n\t\r\n\tpublic void thridMethod() {\r\n\t\tc *= 123.432;\r\n\t\te += \"Asddsa\";\r\n\t}\r\n\t\r\n\tpublic void stupidMethodFive() {\r\n\t\tc = 123.543534\/42.543*423.123+65.2;\r\n\t\td = Math.sqrt(c + d);\r\n\t}\r\n\t\r\n\tpublic void fourthMethod() {\r\n\t\tStringBuilder stringBuilder = new StringBuilder();\r\n\t\tstringBuilder.append(\"raz\");\r\n\t\tstringBuilder.append(f);\r\n\t\tstringBuilder.append(\"dwa\");\r\n\t\tf = stringBuilder.toString();\r\n\t}\r\n\t\r\n\tpublic void stupidMethodSix() {\r\n\t\te = \"olelele\";\r\n\t\ttry {\r\n\t\t\tThread.sleep(200);\r\n\t\t}\r\n\t\tcatch(Exception e) {\r\n\t\t\tf = \"hahah\";\r\n\t\t}\r\n\t}\r\n\t\r\n\tpublic void fifthMethod() {\r\n\t\te = e + \"asd \" + a + b+ c+ d+ e+ f;\r\n\t}\r\n\t\r\n\tpublic static void main(String[] args) {\r\n\t\tManyMethodsUnnecessaryStaff manyMethods = new ManyMethodsUnnecessaryStaff();\r\n\t\tmanyMethods.firstMethod();\r\n\t\tmanyMethods.secondMethod();\r\n\t\tmanyMethods.thridMethod();\r\n\t\tmanyMethods.fourthMethod();\r\n\t\tmanyMethods.fifthMethod();\r\n\t}\r\n}<\/pre>\n<\/li>\n
  4. Czwartym kodem do por\u00f3wnania, b\u0119dzie kopia oryginalnego kodu<\/li>\n<\/ol>\n
    Testujemy!<\/h3>\n
    Stw\u00f3rzmy prost\u0105 metod\u0119, kt\u00f3ra wczyta nasze kody \u017ar\u00f3d\u0142owe oraz wywo\u0142a nasz\u0105 aplikacje i wyliczy prawdopodobie\u0144stwo.<\/p>\n
    fun main(args: Array<String>) {\r\n    val root = \"C:\\\\kody_do_testow\\\\\";\r\n    val oryg = FileInputStream(root + \"oryg\\\\ManyMethods.java\").bufferedReader().use { it -> it.readText() }\r\n    val code1 = FileInputStream(root + \"diff_names\\\\ManyMethodsDifferentNames.java\").bufferedReader().use { it -> it.readText() }\r\n    val code2 = FileInputStream(root + \"included\\\\ManyMethodsIncluded.java\").bufferedReader().use { it -> it.readText() }\r\n    val code3 = FileInputStream(root + \"unn_staff\\\\ManyMethodsUnnecessaryStaff.java\").bufferedReader().use { it -> it.readText() }\r\n    val code4 = FileInputStream(root + \"oryg\\\\ManyMethods.java\").bufferedReader().use { it -> it.readText() }\r\n\r\n    var calculate = PlagDetectorAlgorithm().calculate(LexerType.JAVA_8, oryg, code1)\r\n    println(String.format(\"code1 d=%.2f, px=%.2f, py=%.2f\", calculate.d, calculate.px, calculate.py))\r\n\r\n    calculate = PlagDetectorAlgorithm().calculate(LexerType.JAVA_8, oryg, code2)\r\n    println(String.format(\"code2 d=%.2f, px=%.2f, py=%.2f\", calculate.d, calculate.px, calculate.py))\r\n\r\n    calculate = PlagDetectorAlgorithm().calculate(LexerType.JAVA_8, oryg, code3)\r\n    println(String.format(\"code3 d=%.2f, px=%.2f, py=%.2f\", calculate.d, calculate.px, calculate.py))\r\n\r\n    calculate = PlagDetectorAlgorithm().calculate(LexerType.JAVA_8, oryg, code4)\r\n    println(String.format(\"code4 d=%.2f, px=%.2f, py=%.2f\", calculate.d, calculate.px, calculate.py))\r\n}<\/pre>\n
    Om\u00f3wmy wyniki!<\/h3>\n
    Pora na kr\u00f3tk\u0105 analiz\u0119 wynik\u00f3w.<\/p>\n
      \n
    1. Zmienione nazwy metod i p\u00f3l
      \nProgram zwr\u00f3ci\u0142 nast\u0119puj\u0105cy wynik:<\/p>\n
      d=0.97, px=0.98, py=0.98<\/pre>\n
      Tutaj mo\u017cemy zauwa\u017cy\u0107, \u017ce program poradzi\u0142 sobie ca\u0142kiem nie\u017ale. Wska\u017aniki s\u0105 bardzo bliskie 1, wi\u0119c mo\u017cemy z du\u017c\u0105 doz\u0105 prawdopodobie\u0144stwa stwierdzi\u0107, \u017ce por\u00f3wnywane programy zawieraj\u0105 ten sam kod.<\/li>\n
    2. Kod z metod przeniesiony do g\u0142\u00f3wnej metody
      \nZwr\u00f3cony wynik:<\/p>\n
      d=0.57, px=0.69, py=0.76<\/pre>\n
      Tutaj niestety algorytm poradzi\u0142 sobie du\u017co gorzej. Wystarczy\u0142a drobna zmiana w kodzie i stopie\u0144 wykrywalno\u015bci jest o wiele mniejszy. Mo\u017ce to by\u015b spowodowane tym, \u017ce testowany kod jest kr\u00f3tki i nawet takie ma\u0142e zmiany znacz\u0105co wp\u0142ywaj\u0105 na wyniki. Warto na pewno si\u0119 temu przyjrze\u0107 w przysz\u0142o\u015bci.<\/li>\n
    3. Kod z nieu\u017cywanymi metodami
      \nWyliczone podobie\u0144stwo:<\/p>\n
      d=0.63, px=0.92, py=0.67<\/pre>\n
      Na tym przyk\u0142adzie mo\u017cemy zobaczy\u0107 w praktyce wykorzystanie wska\u017anik\u00f3w px<\/em> oraz py<\/em>. O ile g\u0142\u00f3wny wska\u017anik wynosi tylko 0.63 i nie musi wydawa\u0107 si\u0119 podejrzany, o tyle warto\u015b\u0107 wska\u017anika px<\/em> (0.92) mocno wskazuje, \u017ce jeden z por\u00f3wnywanych kod\u00f3w zawiera du\u017c\u0105 cz\u0119\u015b\u0107 drugiego kodu, oraz \u017ce m\u00f3g\u0142 zaj\u015b\u0107 plagiat.<\/li>\n
    4. Por\u00f3wnanie dw\u00f3ch identycznych kod\u00f3w \u017ar\u00f3d\u0142owych
      \nWynik:<\/p>\n
      d=0.97, px=0.98, py=0.98<\/pre>\n
      Tutaj podobnie jak w pierwszym przypadku algorytm poradzi\u0142 sobie bardzo dobrze i wyliczy\u0142 wska\u017aniki bliskie 1.<\/li>\n<\/ol>\n
      Podsumowanie<\/h3>\n
      Dzisiaj wykonali\u015bmy pierwsze testy naszego algorytmu. Do test\u00f3w u\u017cyli\u015bmy kilka spreparowanych kod\u00f3w \u017ar\u00f3d\u0142owych. Pierwsze wyniki wskazuj\u0105, \u017ce algorytm jakie\u015b prawdopodobie\u0144stwo wylicza \ud83d\ude09<\/p>\n
      W nast\u0119pnym wpisie odno\u015bnie PlagDetectora przeprowadzimy testy na kodach \u017ar\u00f3d\u0142owych z28za czas\u00f3w studenckich \ud83d\ude09<\/p>\n","protected":false},"excerpt":{"rendered":"
      Dzisiaj zajmiemy si\u0119 przetestowaniem naszego algorytmu do wykrywania plagiat\u00f3w w praktyce. Miejmy nadziej\u0119, \u017ce to chocia\u017c troch\u0119 zadzia\u0142a \ud83d\ude09 Zestaw testowy Musimy najpierw zacz\u0105\u0107 od przygotowania danych, na…<\/p>\n","protected":false},"author":1,"featured_media":385,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,19],"tags":[],"class_list":["post-384","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dsp2017","category-plagdetector"],"yoast_head":"\nPrzetestujmy skuteczno\u015b\u0107 algorytmu - cz\u0119\u015b\u0107 pierwsza! - Lukasz Antkowiak's blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.lantkowiak.pl\/index.php\/2017\/05\/28\/przetestujmy-skutecznosc-algorytmu-czesc-pierwsza\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Przetestujmy skuteczno\u015b\u0107 algorytmu - cz\u0119\u015b\u0107 pierwsza! - Lukasz Antkowiak's blog\" \/>\n<meta property=\"og:description\" content=\"Dzisiaj zajmiemy si\u0119 przetestowaniem naszego algorytmu do wykrywania plagiat\u00f3w w praktyce. 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