Ensure cleanup tempfile after some specs (crystal-lang#5810)

* Ensure cleanup tempfile after some specs

* Fix compiler spec

spec/compiler/codegen/private_spec.cr

@@ -20,6 +20,8 @@ describe "Codegen: private" do
     tempfile.close
 
     compiler.compile sources, output_filename
+  ensure
+    File.delete(tempfile.path) if tempfile
   end
 
   it "codegens overloaded private def in same file" do
@@ -45,6 +47,8 @@ describe "Codegen: private" do
     tempfile.close
 
     compiler.compile sources, output_filename
+  ensure
+    File.delete(tempfile.path) if tempfile
   end
 
   it "doesn't include filename for private types" do

spec/compiler/compiler_spec.cr

@@ -11,6 +11,8 @@ describe "Compiler" do
     File.exists?(tempfile.path).should be_true
 
     `#{tempfile.path}`.should eq("Hello!")
+  ensure
+    File.delete(tempfile.path) if tempfile
   end
 
   it "runs subcommand in preference to a filename " do
@@ -23,6 +25,8 @@ describe "Compiler" do
       File.exists?(tempfile.path).should be_true
 
       `#{tempfile.path}`.should eq("Hello!")
+    ensure
+      File.delete(tempfile.path) if tempfile
     end
   end
 end

spec/std/callstack_spec.cr

@@ -33,6 +33,8 @@ describe "Backtrace" do
     output.should_not match(/src\/callstack\.cr/)
     output.should_not match(/src\/exception\.cr/)
     output.should_not match(/src\/raise\.cr/)
+  ensure
+    File.delete(tempfile.path) if tempfile
   end
 
   it "prints exception backtrace to stderr" do
@@ -49,6 +51,8 @@ describe "Backtrace" do
 
     output.to_s.empty?.should be_true
     error.to_s.should contain("IndexError")
+  ensure
+    File.delete(tempfile.path) if tempfile
   end
 
   it "prints crash backtrace to stderr" do
@@ -65,5 +69,7 @@ describe "Backtrace" do
 
     output.to_s.empty?.should be_true
     error.to_s.should contain("Invalid memory access")
+  ensure
+    File.delete(tempfile.path) if tempfile
   end
 end

spec/std/process_spec.cr

@@ -221,6 +221,8 @@ describe Process do
 
     File.exists?(tmpfile.path).should be_true
     tmpfile.unlink
+  ensure
+    File.delete(tmpfile.path) if tmpfile && File.exists?(tmpfile.path)
   end
 
   it "checks for existence" do

spec/std/tempfile_spec.cr

@@ -23,6 +23,8 @@ describe Tempfile do
 
     File.exists?(tempfile.path).should be_true
     File.read(tempfile.path).should eq("Hello!")
+  ensure
+    File.delete(tempfile.path) if tempfile
   end
 
   it "has given extension if passed to constructor" do
@@ -36,34 +38,39 @@ describe Tempfile do
     tempfile.delete
 
     File.exists?(tempfile.path).should be_false
+  ensure
+    File.delete(tempfile.path) if tempfile && File.exists?(tempfile.path)
   end
 
   it "doesn't delete on open with block" do
     tempfile = Tempfile.open("foo") do |f|
       f.print "Hello!"
     end
     File.exists?(tempfile.path).should be_true
+  ensure
+    File.delete(tempfile.path) if tempfile
   end
 
   it "has given extension if passed to open" do
     tempfile = Tempfile.open("foo", ".pdf") { |f| }
     File.extname(tempfile.path).should eq(".pdf")
+  ensure
+    File.delete(tempfile.path) if tempfile
   end
 
   it "creates and writes with TMPDIR environment variable" do
     old_tmpdir = ENV["TMPDIR"]?
     ENV["TMPDIR"] = "/tmp"
 
-    begin
-      tempfile = Tempfile.new "foo"
-      tempfile.print "Hello!"
-      tempfile.close
+    tempfile = Tempfile.new "foo"
+    tempfile.print "Hello!"
+    tempfile.close
 
-      File.exists?(tempfile.path).should be_true
-      File.read(tempfile.path).should eq("Hello!")
-    ensure
-      ENV["TMPDIR"] = old_tmpdir if old_tmpdir
-    end
+    File.exists?(tempfile.path).should be_true
+    File.read(tempfile.path).should eq("Hello!")
+  ensure
+    ENV["TMPDIR"] = old_tmpdir if old_tmpdir
+    File.delete(tempfile.path) if tempfile
   end
 
   it "is seekable" do
@@ -76,19 +83,23 @@ describe Tempfile do
     tempfile.pos = 0
     tempfile.gets(chomp: false).should eq("Hello!\n")
     tempfile.close
+  ensure
+    File.delete(tempfile.path) if tempfile
   end
 
   it "returns default directory for tempfiles" do
     old_tmpdir = ENV["TMPDIR"]?
     ENV.delete("TMPDIR")
     Tempfile.dirname.should eq("/tmp")
+  ensure
     ENV["TMPDIR"] = old_tmpdir if old_tmpdir
   end
 
   it "returns configure directory for tempfiles" do
     old_tmpdir = ENV["TMPDIR"]?
     ENV["TMPDIR"] = "/my/tmp"
     Tempfile.dirname.should eq("/my/tmp")
+  ensure
     ENV["TMPDIR"] = old_tmpdir if old_tmpdir
   end
 end