improve failing test output, add a summary

go2v_test.v

@@ -4,30 +4,36 @@ import strings
 import os
 
 fn test_all() {
-	mut subdir := 'tests'
+	subdir := 'tests'
 	mut app := &App{
 		sb: strings.new_builder(1000)
 	}
 
 	// All tests
 	mut test_names := os.ls('tests') or { return }
 	test_names.sort()
-	mut tests_ok := true
+	mut tests_failures := []string{}
 	for test_name in test_names {
-		println('===========================================')
+		println('='.repeat(44))
 		create_json(subdir, test_name)
 		// A separate instance for each test
 		mut app2 := &App{
 			sb: strings.new_builder(1000)
 		}
 		app2.run_test(subdir, test_name) or {
 			eprintln('Error running test ${test_name}: ${err}')
-			break
+			exit(1)
+		}
+		if !app2.tests_ok {
+			tests_failures << test_name
 		}
-		tests_ok &&= app2.tests_ok
 	}
-	// if !app.tests_ok {
-	if !tests_ok {
+	if tests_failures.len != 0 {
+		eprintln('='.repeat(80))
+		eprintln('Found ${tests_failures.len} go2v errors. Use the following commands to reproduce them in isolation:')
+		for f in tests_failures {
+			eprintln('    ./go2v ${subdir}/${f}')
+		}
 		exit(1)
 	}
 }

main.v

@@ -87,6 +87,10 @@ fn (mut app App) typ(t Type) {
 }
 
 fn generate_ast_for_go_file(go_file_path string) string {
+	if !os.exists(go_file_path) {
+		eprintln('Missing input .go file: `${go_file_path}`.')
+		return ''
+	}
 	output_file := go_file_path + '.json'
 
 	asty_cmd := '${full_path_to_asty} go2json -comments -indent 2 -input ${go_file_path} -output ${output_file}'