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test: add control flow test
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‎tests/control_flow.rs

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use assert_cmd::Command;
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use predicates::prelude::predicate;
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#[test]
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fn control_flow() -> Result<(), Box<dyn std::error::Error>> {
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let mut cmd = Command::cargo_bin("cmjava")?;
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cmd.arg("tests/data/control_flow/Main.class");
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cmd.assert()
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.success()
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.stdout(predicate::str::contains("i % 10 == 0\n".repeat(10)))
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.stdout(predicate::str::contains("a / 2 == 5\n"))
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.stdout(predicate::str::contains("l / 2 != 5\n"))
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.stdout(predicate::str::contains("d:\n15\n"))
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.stdout(predicate::str::contains("f > 10"));
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Ok(())
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}

‎tests/data/control_flow/Main.class

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‎tests/data/control_flow/Main.java

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package org.cmjava2023;
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public class Main {
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public static void main(String[] args) {
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for (int i = 0; i < 100; i++) {
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if (i % 10 == 0) {
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System.out.println("i % 10 == 0");
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}
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}
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int a = 10;
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if (a / 2 == 5) {
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System.out.println("a / 2 == 5");
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} else {
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System.out.println("a / 2 != 5");
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}
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long l = 100;
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if (l / 2 == 5) {
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System.out.println("l / 2 == 5");
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} else {
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System.out.println("l / 2 != 5");
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}
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double d = 10.0;
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while (d < 15.0) {
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d += 1.0;
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}
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System.out.println("d:");
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System.out.println(d);
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float f = 12.0f;
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if (f < 10) {
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System.out.println("f < 10");
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} else if (f > 10) {
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System.out.println("f > 10");
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} else {
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System.out.println("f == 10");
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}
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}
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}

‎tests/data/control_flow/Main.javap

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Classfile /home/florian/Documents/fh/WS23_24/Compilerbau/vm/main/tests/data/control_flow/Main.class
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Last modified 19.12.2023; size 1127 bytes
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MD5 checksum 197352d71ec064ad9cd95b0b7235fece
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Compiled from "Main.java"
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public class org.cmjava2023.Main
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minor version: 0
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major version: 52
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flags: ACC_PUBLIC, ACC_SUPER
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Constant pool:
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#1 = Methodref #27.#51 // java/lang/Object."<init>":()V
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#2 = Fieldref #52.#53 // java/lang/System.out:Ljava/io/PrintStream;
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#3 = String #54 // i % 10 == 0
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#4 = Methodref #55.#56 // java/io/PrintStream.println:(Ljava/lang/String;)V
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#5 = String #57 // a / 2 == 5
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#6 = String #58 // a / 2 != 5
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#7 = Long 100l
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#9 = Long 2l
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#11 = Long 5l
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#13 = String #59 // l / 2 == 5
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#14 = String #60 // l / 2 != 5
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#15 = Double 10.0d
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#17 = Double 15.0d
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#19 = String #61 // d:
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#20 = Methodref #55.#62 // java/io/PrintStream.println:(D)V
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#21 = Float 12.0f
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#22 = Float 10.0f
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#23 = String #63 // f < 10
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#24 = String #64 // f > 10
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#25 = String #65 // f == 10
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#26 = Class #66 // org/cmjava2023/Main
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#27 = Class #67 // java/lang/Object
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#28 = Utf8 <init>
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#29 = Utf8 ()V
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#30 = Utf8 Code
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#31 = Utf8 LineNumberTable
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#32 = Utf8 LocalVariableTable
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#33 = Utf8 this
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#34 = Utf8 Lorg/cmjava2023/Main;
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#35 = Utf8 main
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#36 = Utf8 ([Ljava/lang/String;)V
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#37 = Utf8 i
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#38 = Utf8 I
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#39 = Utf8 args
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#40 = Utf8 [Ljava/lang/String;
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#41 = Utf8 a
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#42 = Utf8 l
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#43 = Utf8 J
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#44 = Utf8 d
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#45 = Utf8 D
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#46 = Utf8 f
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#47 = Utf8 F
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#48 = Utf8 StackMapTable
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#49 = Utf8 SourceFile
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#50 = Utf8 Main.java
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#51 = NameAndType #28:#29 // "<init>":()V
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#52 = Class #68 // java/lang/System
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#53 = NameAndType #69:#70 // out:Ljava/io/PrintStream;
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#54 = Utf8 i % 10 == 0
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#55 = Class #71 // java/io/PrintStream
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#56 = NameAndType #72:#73 // println:(Ljava/lang/String;)V
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#57 = Utf8 a / 2 == 5
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#58 = Utf8 a / 2 != 5
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#59 = Utf8 l / 2 == 5
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#60 = Utf8 l / 2 != 5
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#61 = Utf8 d:
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#62 = NameAndType #72:#74 // println:(D)V
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#63 = Utf8 f < 10
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#64 = Utf8 f > 10
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#65 = Utf8 f == 10
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#66 = Utf8 org/cmjava2023/Main
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#67 = Utf8 java/lang/Object
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#68 = Utf8 java/lang/System
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#69 = Utf8 out
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#70 = Utf8 Ljava/io/PrintStream;
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#71 = Utf8 java/io/PrintStream
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#72 = Utf8 println
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#73 = Utf8 (Ljava/lang/String;)V
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#74 = Utf8 (D)V
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{
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public org.cmjava2023.Main();
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descriptor: ()V
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flags: ACC_PUBLIC
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Code:
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stack=1, locals=1, args_size=1
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0: aload_0
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1: invokespecial #1 // Method java/lang/Object."<init>":()V
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4: return
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LineNumberTable:
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line 3: 0
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LocalVariableTable:
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Start Length Slot Name Signature
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0 5 0 this Lorg/cmjava2023/Main;
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public static void main(java.lang.String[]);
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descriptor: ([Ljava/lang/String;)V
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flags: ACC_PUBLIC, ACC_STATIC
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Code:
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stack=4, locals=7, args_size=1
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0: iconst_0
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1: istore_1
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2: iload_1
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3: bipush 100
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5: if_icmpge 29
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8: iload_1
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9: bipush 10
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11: irem
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12: ifne 23
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15: getstatic #2 // Field java/lang/System.out:Ljava/io/PrintStream;
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18: ldc #3 // String i % 10 == 0
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20: invokevirtual #4 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
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23: iinc 1, 1
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26: goto 2
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29: bipush 10
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31: istore_1
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32: iload_1
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33: iconst_2
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34: idiv
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35: iconst_5
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36: if_icmpne 50
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39: getstatic #2 // Field java/lang/System.out:Ljava/io/PrintStream;
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42: ldc #5 // String a / 2 == 5
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44: invokevirtual #4 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
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47: goto 58
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50: getstatic #2 // Field java/lang/System.out:Ljava/io/PrintStream;
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53: ldc #6 // String a / 2 != 5
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55: invokevirtual #4 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
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58: ldc2_w #7 // long 100l
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61: lstore_2
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62: lload_2
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63: ldc2_w #9 // long 2l
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66: ldiv
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67: ldc2_w #11 // long 5l
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70: lcmp
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71: ifne 85
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74: getstatic #2 // Field java/lang/System.out:Ljava/io/PrintStream;
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77: ldc #13 // String l / 2 == 5
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79: invokevirtual #4 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
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82: goto 93
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85: getstatic #2 // Field java/lang/System.out:Ljava/io/PrintStream;
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88: ldc #14 // String l / 2 != 5
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90: invokevirtual #4 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
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93: ldc2_w #15 // double 10.0d
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96: dstore 4
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98: dload 4
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100: ldc2_w #17 // double 15.0d
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103: dcmpg
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104: ifge 116
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107: dload 4
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109: dconst_1
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110: dadd
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111: dstore 4
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113: goto 98
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116: getstatic #2 // Field java/lang/System.out:Ljava/io/PrintStream;
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119: ldc #19 // String d:
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121: invokevirtual #4 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
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124: getstatic #2 // Field java/lang/System.out:Ljava/io/PrintStream;
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127: dload 4
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129: invokevirtual #20 // Method java/io/PrintStream.println:(D)V
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132: ldc #21 // float 12.0f
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134: fstore 6
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136: fload 6
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138: ldc #22 // float 10.0f
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140: fcmpg
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141: ifge 155
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144: getstatic #2 // Field java/lang/System.out:Ljava/io/PrintStream;
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147: ldc #23 // String f < 10
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149: invokevirtual #4 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
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152: goto 182
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155: fload 6
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157: ldc #22 // float 10.0f
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159: fcmpl
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160: ifle 174
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163: getstatic #2 // Field java/lang/System.out:Ljava/io/PrintStream;
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166: ldc #24 // String f > 10
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168: invokevirtual #4 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
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171: goto 182
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174: getstatic #2 // Field java/lang/System.out:Ljava/io/PrintStream;
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177: ldc #25 // String f == 10
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179: invokevirtual #4 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
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182: return
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LineNumberTable:
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line 5: 0
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line 6: 8
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line 7: 15
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line 5: 23
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line 11: 29
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line 12: 32
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line 13: 39
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line 15: 50
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line 18: 58
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line 19: 62
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line 20: 74
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line 22: 85
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line 25: 93
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line 26: 98
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line 27: 107
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line 29: 116
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line 30: 124
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line 32: 132
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line 33: 136
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line 34: 144
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line 35: 155
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line 36: 163
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line 38: 174
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line 40: 182
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LocalVariableTable:
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Start Length Slot Name Signature
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2 27 1 i I
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0 183 0 args [Ljava/lang/String;
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32 151 1 a I
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62 121 2 l J
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98 85 4 d D
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136 47 6 f F
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StackMapTable: number_of_entries = 12
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frame_type = 252 /* append */
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offset_delta = 2
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locals = [ int ]
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frame_type = 20 /* same */
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frame_type = 250 /* chop */
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offset_delta = 5
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frame_type = 252 /* append */
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offset_delta = 20
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locals = [ int ]
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frame_type = 7 /* same */
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frame_type = 252 /* append */
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offset_delta = 26
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locals = [ long ]
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frame_type = 7 /* same */
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frame_type = 252 /* append */
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offset_delta = 4
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locals = [ double ]
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frame_type = 17 /* same */
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frame_type = 252 /* append */
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offset_delta = 38
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locals = [ float ]
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frame_type = 18 /* same */
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frame_type = 7 /* same */
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}
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SourceFile: "Main.java"

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