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test/swen90006/machine/BoundaryTests.java

+package swen90006.machine;
+
+import java.util.List;
+import java.util.ArrayList;
+import java.nio.charset.Charset;
+import java.nio.file.Path;
+import java.nio.file.Files;
+import java.nio.file.FileSystems;
+
+import org.junit.*;
+import static org.junit.Assert.*;
+
+public class BoundaryTests
+{
+	Machine m = new Machine();
+	
+	//Test valid case when the Ra in RET holds some value
+	 @Test public void TestEC1()
+	  {
+	    final List<String> lines = readInstructions("boundaryEC1.s");
+	    m.execute(lines);
+	  }
+	//Test on points for register is valid
+	  @Test public void TestEC2a()
+	  {
+		  final List<String> lines = readInstructions("boundaryEC2a.s");
+		  m.execute(lines);
+	  }
+	  
+	//Test on points for register is valid
+	  @Test public void TestEC2b()
+	  {
+		  final List<String> lines = readInstructions("boundaryEC2b.s");
+		  m.execute(lines);
+	  }
+	  
+	  //Test on point for Rc is not equal to 0
+	  @Test public void TestEC3a() 
+	 {
+		  final List<String> lines = readInstructions("boundaryEC3a.s");
+		  m.execute(lines);
+	 }
+	  
+	  //Test off point for Rc is 0
+	  @Test public void TestEC3b()
+	 {
+		  final List<String> lines = readInstructions("boundaryEC3b.s");
+		  m.execute(lines);//"no op" for dividend is 0, so there should throw no exception
+	 }
+	  
+	  //Test off point for val is not equal to 1
+	  @Test(expected = NoReturnValueException.class)
+	  public void TestEC5() throws Throwable
+	 {
+		  final List<String> lines = readInstructions("boundaryEC5.s");  
+		  m.execute(lines);
+		  throw new NoReturnValueException();
+	 }
+	  
+	  //Test on point for the val is the length of the program
+	  @Test public void TestEC6() 
+	 {
+		  final List<String> lines = readInstructions("boundaryEC6.s");
+		  m.execute(lines);
+	 }
+	  
+	  //Test off point for val is greater than the length of the program
+	  @Test(expected = NoReturnValueException.class)
+	  
+	  public void TestEC7() throws Throwable
+	 {
+		  final List<String> lines = readInstructions("boundaryEC7.s");  
+		  m.execute(lines);
+		  throw new NoReturnValueException();
+	 }
+	  
+	  //Test on point for value belongs to {-65535,...,65535}
+	  @Test public void TestEC10a() 
+	 {
+		  final List<String> lines = readInstructions("boundaryEC10a.s");
+		  m.execute(lines);
+	 }
+	  //Test on point for value belongs to {-65535,...,65535}
+	  @Test public void TestEC10b() 
+	 {
+		  final List<String> lines = readInstructions("boundaryEC10b.s");
+		  m.execute(lines);
+	 }
+	  //Test off point for value belongs to {-65535,...,65535}
+	  @Test(expected = InvalidInstructionException.class)
+	  public void TestEC10c()  throws Throwable
+	 {
+		  final List<String> lines = readInstructions("boundaryEC10c.s");
+		  m.execute(lines);
+		  throw new InvalidInstructionException();
+	 }
+	  
+	  //Test on point for pc value in LDR is valid
+	  @Test public void TestEC11a() 
+	 {
+		  final List<String> lines = readInstructions("boundaryEC11a.s");
+		  m.execute(lines);
+	 }
+	  //Test on point for pc value in LDR is valid
+	  @Test public void TestEC11b() 
+	 {
+		  final List<String> lines = readInstructions("boundaryEC11b.s");
+		  m.execute(lines);
+	 }
+	  //Test off point for pc value in LDR is valid
+	  @Test(expected = InvalidInstructionException.class)
+	  public void TestEC11c()  throws Throwable
+	 {
+		  final List<String> lines = readInstructions("boundaryEC11c.s");
+		  m.execute(lines);
+		  throw new InvalidInstructionException();
+	 }
+	  //Test on point for JZ instruction is valid
+	  @Test public void TestEC13() 
+	 {
+		  final List<String> lines = readInstructions("boundaryEC13.s");
+		  m.execute(lines);
+	 }
+	  
+	  //Test off point for JZ instruction is valid
+	  @Test(expected = NoReturnValueException.class)
+	  public void TestEC14() throws Throwable
+	 {
+		  final List<String> lines = readInstructions("boundaryEC14.s");
+		  m.execute(lines);
+		  throw new NoReturnValueException();
+	 }
+	  
+	  //Test on point for JZ instruction is valid with Ra is 0
+	  @Test public void TestEC15() 
+	 {
+		  final List<String> lines = readInstructions("boundaryEC15.s");
+		  m.execute(lines);
+	 }
+	  
+	  //Test off point for invalid instruction with no instructions in the file
+	  @Test(expected = ArrayIndexOutOfBoundsException.class)
+	  public void TestEC17() throws Throwable
+	 {
+		  final List<String> lines = readInstructions("boundaryEC17.s");
+		  m.execute(lines);
+		  throw new ArrayIndexOutOfBoundsException();
+	 }
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+	  
+  //Any method annotation with "@Test" is executed as a test.
+  @Test public void aTest()
+  {
+    //the assertEquals method used to check whether two values are
+    //equal, using the equals method
+    final int expected = 2;
+    final int actual = 1 + 1;
+    assertEquals(expected, actual);
+  }
+
+  @Test public void anotherTest()
+  {
+    List<String> list = new ArrayList<String>();
+    list.add("a");
+    list.add("b");
+
+    //the assertTrue method is used to check whether something holds.
+    assertTrue(list.contains("a"));
+  }
+  
+  //To test an exception, specify the expected exception after the @Test
+  @Test(expected = java.io.IOException.class) 
+    public void anExceptionTest()
+    throws Throwable
+  {
+    throw new java.io.IOException();
+  }
+
+  //This test should fail.
+  //To provide additional feedback when a test fails, an error message
+  //can be included
+  @Test public void aFailedTest()
+  {
+    //include a message for better feedback
+    final int expected = 2;
+    final int actual = 1 + 2;
+    assertEquals("Some failure message", expected, actual);
+  }
+
+  //Read in a file containing a program and convert into a list of
+  //string instructions
+  private List<String> readInstructions(String file)
+  {
+    Charset charset = Charset.forName("UTF-8");
+    List<String> lines = null;
+    try {
+      lines = Files.readAllLines(FileSystems.getDefault().getPath(file), charset);
+    }
+    catch (Exception e){
+      System.err.println("Invalid input file! (stacktrace follows)");
+      e.printStackTrace(System.err);
+      System.exit(1);
+    }
+    return lines;
+  }
+}