New rule: debugger statement

spec/ameba/rules/debugger_statement_spec.cr

@@ -0,0 +1,44 @@
+require "../../spec_helper"
+
+module Ameba::Rules
+  subject = DebuggerStatement.new
+
+  describe DebuggerStatement do
+    it "passes if there is no debugger statement" do
+      s = Source.new %(
+        "this is not a debugger statement"
+        s = "debugger"
+
+        def debugger(program)
+        end
+        debugger ""
+
+        class A
+          def debugger
+          end
+        end
+        A.new.debugger
+      )
+      subject.catch(s).valid?.should be_true
+    end
+
+    it "fails if there is a debugger statement" do
+      s = Source.new %(
+        a = 2
+        debugger
+        a = a + 1
+      )
+      subject.catch(s).valid?.should be_false
+    end
+
+    it "reports rule, pos and message" do
+      s = Source.new "debugger"
+      subject.catch(s).valid?.should be_false
+
+      error = s.errors.first
+      error.rule.should_not be_nil
+      error.pos.should eq 1
+      error.message.should eq "Possible forgotten debugger statement detected"
+    end
+  end
+end