Improve test running

Move test running to a method on the Test class and improve output
printing logic.

bin/iutils

@@ -41,26 +41,7 @@ multi MAIN(
                 say "{colored '**', 'magenta bold'} Testing $colored-module"
                     .indent(2);
                 for $module.tests -> $test {
-                    try {
-                        # FIXME this doesn't actually capture the exit code
-                        idris-exec $test.expr, $module.source.relative, $test.output-type;
-                    }
-                    my $testf = colored $test.name, 'underline';
-                    if $! ~~ ExpressionError {
-                        # TODO: Don't show stdout if its empty
-                        $module-failures += 1;
-                        say "{colored '+', 'red'} $testf: {colored 'FAIL', 'red bold'}"
-                            .indent(4);
-                        say "stdout:".indent(6);
-                        say $!.err.lines.map(*.indent(8)).join("\n");
-                        say (colored 'exit code', 'red').indent(6),
-                            ": {$!.exit-code}";
-                    } elsif $! {
-                        die $!;
-                    } else {
-                        say "{colored '+', 'green'} $testf: {colored 'pass', 'green'}"
-                        .indent(4);
-                    }
+                    $module-failures += 1 if $test.run: $module.source;
                 }
                 if $module-failures == 0 {
                    say "All $colored-module ".indent(4),

lib/IUtils.rakumod

@@ -3,6 +3,8 @@ unit module IUtils;
 
 need IUtils::IDEMode;
 
+use Terminal::ANSIColor;
+
 use IUtils::Regexes;
 use IUtils::Compiler;
 
@@ -16,6 +18,38 @@ class Test {
     has Str:D $.expr is required;
     #| The output type of the test
     has ExprOutput:D $.output-type is required;
+
+    #| Run this test, and return true if it failed, false if it passed
+    method run(IO::Path:D $source, Int:D $indent-level? = 4 --> Bool) {
+        CATCH {
+            when ExpressionError {
+                say "{colored '+', 'red'} $.name: {colored 'FAIL', 'red bold'}"
+                    .indent($indent-level);
+                say "{colored('exit code', 'red')}: {$_.exit-code}"
+                    .indent($indent-level + 2);
+                if $_.out.trim {
+                    say colored('stdout:', 'underline')
+                        .indent($indent-level + 2);
+                    say $_.out.trim.lines.map(*.indent($indent-level + 2))
+                        .join("\n");
+                }
+                if $_.err.trim {
+                    say colored('stderr:', 'underline')
+                        .indent($indent-level + 2);
+                    say $_.err.trim.lines.map(*.indent($indent-level + 2))
+                        .join("\n");
+                }
+                return True;
+            }
+        }
+
+        idris-exec $.expr, $source.relative, $.output-type;
+        # The exception handler graps flow if the test failed, here the test passed
+        my $output =
+            "{colored '+', 'green'} $.name: {colored 'pass', 'green'}";
+        say $output.indent($indent-level);
+        return False;
+    }
 }
 
 #| Structure representing the tests in a module
@@ -60,7 +94,6 @@ class PackageInfo {
                             when * eq 'Bool' {succeed Boolean};
                             when * eq 'Either' {succeed Either};
                         };
-                    say $output-type;
                     my $test =
                         Test.new(name => $match<test-name>.Str,
                                  expr => $match<expression-name>.Str,

lib/IUtils/Compiler.rakumod

@@ -88,9 +88,11 @@ my constant $bool-lambda =
     '(\x => if x then exitSuccess else exitFailure)';
 
 # TODO: Implemenent support for the Either case
-# TODO: Use the ide protocol to drive this so we can avoid the user needing to
-# import anything
-# Exec the expression with the given name in the given file
+# TODO: Use the ide protocol to drive this so we can avoid the user needing to import anything
+#| Exec the expression with the given name in the given file
+#|
+#| Uses the provided $output-type to hook up an adaptor for tests returning a
+#| non () value
 sub idris-exec($expr, $file, $output-type? = Unit) is export {
     # Have idris compile an executable for the expression,
     given $output-type {