Eclipse EcLemma number of covered instructions more than lines of code

Question

In the coverage result, it shows that I've covered 9 instructions while there are only 5 lines highlighted green. Which are the other 4 instructions?

Maybe it means bytecode instructions. – shmosel May 03 '16 at 16:30 — shmosel, May 03 '16 at 16:30
@shmosel : I don't think that's the case – Akash Agarwal May 03 '16 at 16:31 — Akash Agarwal, May 03 '16 at 16:31

score 5 · Accepted Answer · answered May 03 '16 at 16:47

Click the dropdown arrow at the top right of the Coverage box. It'll give you a couple different ways to measure your coverage. The default seems to be instructions (bytecode instructions), but you can manually select lines.

The reason you are seeing 9 instructions is because there are 9 bytecode instructions in Foo:

$ javap -c Foo.class 
Compiled from "Foo.java"
public class Foo {
  public Foo();
    Code:
       0: aload_0
       1: invokespecial #8                  // Method java/lang/Object."<init>":()V
       4: return

  public static void main(java.lang.String[]);
    Code:
       0: getstatic     #16                 // Field java/lang/System.out:Ljava/io/PrintStream;
       3: ldc           #22                 // String Test
       5: invokevirtual #24                 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
       8: new           #1                  // class Foo
      11: invokespecial #30                 // Method "<init>":()V
      14: return
}

This is pure genius! Thanks a lot sir. – Akash Agarwal May 03 '16 at 16:50 — Akash Agarwal, May 03 '16 at 16:50

score 2 · Answer 2 · answered May 03 '16 at 16:35

2

As @schmosel says, it is counting bytecode instructions.

You can verify this by reading the EMMA reference documentation (EclEMMA is an Eclipse GUI wrapped around EMMA), in which the phrase "bytecode instructions" is used throughout.

answered May 03 '16 at 16:35

slim

40,215
13
94
127

Can you please refer me to a link where I can find the bytecode instructions EcLemma is running? – Akash Agarwal May 03 '16 at 16:40
The most general solution is javap https://docs.oracle.com/javase/7/docs/technotes/tools/windows/javap.html -- you may seek out your own GUI equivalent if you like. – slim May 03 '16 at 16:42
So which class should I run with the javap command for my query, if you may know? – Akash Agarwal May 03 '16 at 16:43

Eclipse EcLemma number of covered instructions more than lines of code

2 Answers2