ruby: test rb/uninitialized-local-variable

It finds none of the right things and all of the wrong things...

Author: yoff

ruby/ql/test/query-tests/variables/UninitializedLocal/UninitializedLocal.expected

@@ -0,0 +1,6 @@
+| UninitializedLocal.rb:17:18:17:18 | x | Local variable $@ may be used before it is initialized. | UninitializedLocal.rb:17:9:17:9 | x | x |
+| UninitializedLocal.rb:26:10:26:15 | status | Local variable $@ may be used before it is initialized. | UninitializedLocal.rb:24:9:24:14 | status | status |
+| UninitializedLocal.rb:39:10:39:10 | a | Local variable $@ may be used before it is initialized. | UninitializedLocal.rb:35:5:35:5 | a | a |
+| UninitializedLocal.rb:40:10:40:10 | b | Local variable $@ may be used before it is initialized. | UninitializedLocal.rb:36:5:36:5 | b | b |
+| UninitializedLocal.rb:45:10:45:10 | a | Local variable $@ may be used before it is initialized. | UninitializedLocal.rb:35:5:35:5 | a | a |
+| UninitializedLocal.rb:46:10:46:10 | b | Local variable $@ may be used before it is initialized. | UninitializedLocal.rb:36:5:36:5 | b | b |

ruby/ql/test/query-tests/variables/UninitializedLocal/UninitializedLocal.qlref

@@ -0,0 +1,2 @@
+query: queries/variables/UninitializedLocal.ql
+postprocess: utils/test/InlineExpectationsTestQuery.ql

ruby/ql/test/query-tests/variables/UninitializedLocal/UninitializedLocal.rb

@@ -0,0 +1,49 @@
+def test_basic
+    puts x  #$ MISSING: Alert
+end
+
+def test_nil
+    x = foo.nil? #$ MISSING: Alert
+    puts x
+end
+
+def test_condition
+    if x  #$ MISSING: Alert
+        puts x #$ MISSING: Alert
+    end
+end
+
+def test_nested_condition
+    if (x = 4 || x)  #$ SPURIOUS: Alert
+        puts x
+    end
+end
+
+def test_conditional_assignment
+    if false
+        status = i  #$ MISSING: Alert
+    end
+    puts status  #$ SPURIOUS: Alert
+    puts i  #$ MISSING: Alert
+end
+
+def get
+    raise SyntaxError
+end
+  
+def test_rescue_ensure
+    a = get()
+    b = c + 2  #$ MISSING: Alert
+rescue SyntaxError
+    puts "rescue"
+    puts a  #$ SPURIOUS: Alert
+    puts b  #$ SPURIOUS: Alert
+    puts c  #$ MISSING: Alert
+    puts "rescue end"
+ensure
+    puts "ensure"
+    puts a  #$ SPURIOUS: Alert
+    puts b  #$ SPURIOUS: Alert
+    puts c  #$ MISSING: Alert
+    puts "the end"
+end