tests/org.simantics.scl.compiler.tests/src/org/simantics/scl/compiler/tests/TestBase.java

   1 package org.simantics.scl.compiler.tests;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.nio.charset.Charset;
   6 import java.util.ArrayList;
   7 import java.util.Arrays;
   8 import java.util.regex.Pattern;
   9
  10 import org.junit.Assert;
  11 import org.simantics.scl.compiler.errors.Failable;
  12 import org.simantics.scl.compiler.errors.Failure;
  13 import org.simantics.scl.compiler.module.ImportDeclaration;
  14 import org.simantics.scl.compiler.module.Module;
  15 import org.simantics.scl.compiler.module.repository.ModuleRepository;
  16 import org.simantics.scl.compiler.module.repository.UpdateListener;
  17 import org.simantics.scl.compiler.source.ModuleSource;
  18 import org.simantics.scl.compiler.source.StringModuleSource;
  19 import org.simantics.scl.compiler.source.repository.MapModuleSourceRepository;
  20 import org.simantics.scl.compiler.top.ValueNotFound;
  21
  22 public class TestBase {
  23
  24     public static final ModuleRepository PRELUDE_MODULE_REPOSITORY = InitialRepository.getInitialRepository();
  25     private static final Pattern TEST_SEPARATOR = Pattern.compile("^--+ *$", Pattern.MULTILINE);
  26     private static final Charset UTF8 = Charset.forName("UTF-8");
  27
  28     String path;
  29
  30     public TestBase(String path) {
  31         this.path = path;
  32     }
  33
  34     protected void test() {
  35         String testModuleName = Thread.currentThread().getStackTrace()[2].getMethodName();
  36         String testPath = path + "/" + testModuleName + ".scl";
  37
  38         try {
  39             String[] testParts = readTestParts(testPath);
  40
  41             int j=0;
  42             ArrayList<String> auxModuleNameList = new ArrayList<String>();
  43             while(j < testParts.length) {
  44                 String part = testParts[j];
  45                 if(part.startsWith("// module "))
  46                     auxModuleNameList.add(part.substring(10).split("\\n", 2)[0].trim());
  47                 else
  48                     break;
  49                 ++j;
  50             }
  51             int mainId = j;
  52             String[] moduleNames = new String[mainId+1];
  53             String[] moduleTexts = new String[mainId+1];
  54             for(int i=0;i<mainId;++i) {
  55                 moduleNames[i] = auxModuleNameList.get(i);
  56                 moduleTexts[i] = testParts[i];
  57             }
  58             moduleNames[mainId] = testModuleName;
  59
  60             for(;j<testParts.length;j+=2) {
  61                 moduleTexts[mainId] = testParts[j];
  62                 String expectedOutput = j+1<testParts.length ? testParts[j+1] : "";
  63                 String actualOutput = test(moduleNames, moduleTexts);
  64                 Assert.assertEquals(
  65                         canonicalizeOutput(expectedOutput),
  66                         canonicalizeOutput(actualOutput));
  67             }
  68         } catch(IOException e) {
  69             throw new RuntimeException(e);
  70         } catch (ValueNotFound e) {
  71             throw new RuntimeException(e);
  72         }
  73     }
  74
  75     private static String canonicalizeOutput(String text) {
  76         return text.trim().replace("\r\n", "\n");
  77     }
  78
  79     protected String test(String[] moduleNames, String[] moduleTexts) throws ValueNotFound {
  80         if(moduleNames.length != moduleTexts.length)
  81             throw new IllegalArgumentException();
  82         /*for(int i=0;i<moduleNames.length;++i) {
  83             System.out.println("-- " + moduleNames[i] + " --");
  84             System.out.println(moduleTexts[i]);
  85         }*/
  86
  87         ModuleSource[] moduleSources = new ModuleSource[moduleNames.length];
  88         for(int i=0;i<moduleNames.length;++i)
  89             moduleSources[i] = new StringModuleSource(
  90                     moduleNames[i], getClass().getClassLoader(), moduleTexts[i]) {
  91                 @Override
  92                 protected ImportDeclaration[] getBuiltinImports(UpdateListener listener) {
  93                     return ImportDeclaration.ONLY_BUILTINS;
  94                 }
  95             };
  96         ModuleRepository testEnvironment = new ModuleRepository(
  97                 PRELUDE_MODULE_REPOSITORY,
  98                 new MapModuleSourceRepository(moduleSources));
  99         int lastId = moduleNames.length-1;
 100         Failable<Module> result = testEnvironment.getModule(moduleNames[lastId]);
 101         if(!result.didSucceed())
 102             return ((Failure)result).toString(moduleTexts[lastId]);
 103         else {
 104             Object main = testEnvironment.getRuntimeModule(moduleNames[lastId]).getResult().getValue("main");
 105             return String.valueOf(main);
 106         }
 107     }
 108
 109     private String[] readTestParts(String testPath) throws IOException {
 110         InputStream stream = getClass().getResourceAsStream(testPath);
 111         try {
 112             byte[] buffer = new byte[1024];
 113             int pos = 0;
 114             while(true) {
 115                 int c = stream.read(buffer, pos, buffer.length-pos);
 116                 if(c <= 0)
 117                     break;
 118                 pos += c;
 119                 if(pos < buffer.length)
 120                     break;
 121                 buffer = Arrays.copyOf(buffer, pos*2);
 122             }
 123             String text = new String(buffer, 0, pos, UTF8);
 124             String[] result = TEST_SEPARATOR.split(text);
 125             for(int i=1;i<result.length;++i) {
 126                 if(result[i].startsWith("\r\n"))
 127                     result[i] = result[i].substring(2);
 128                 if(result[i].startsWith("\n") || result[i].startsWith("\r"))
 129                     result[i] = result[i].substring(1);
 130             }
 131             return result;
 132         } finally {
 133             stream.close();
 134         }
 135     }
 136 }