testing: refactor the v test implementation to make supporting different output modes easier

cmd/tools/modules/testing/output_normal.v

@@ -0,0 +1,73 @@
+module testing
+
+import term
+
+pub const empty = term.header(' ', ' ')
+
+// NormalReporter implements the interface testing.Reporter.
+// It is used by default by `v test .`
+// It was extracted by the original non customiseable output implementation directly in cmd/tools/modules/testing/common.v
+pub struct NormalReporter {
+}
+
+pub fn (r NormalReporter) session_start(message string, mut ts TestSession) {
+	header(message)
+}
+
+pub fn (r NormalReporter) session_stop(message string, mut ts TestSession) {
+	println(ts.benchmark.total_message(message))
+}
+
+// the most general form; it may be useful for other reporters
+// in the normal one, it currently does nothing
+pub fn (r NormalReporter) report(index int, message LogMessage) {
+	// eprintln('> ${@METHOD} index: $index | message: $message')
+}
+
+pub fn (r NormalReporter) report_stop() {
+	// eprintln('> ${@METHOD}')
+	eprintln('')
+}
+
+//// TODO: reconsider if these should be public:
+
+pub fn (r NormalReporter) progress(index int, message string) {
+	eprintln(message)
+}
+
+// in progress mode, the last line will be rewritten many times, and does not end with \n
+// the \n will be printed just once when some progress has been made.
+pub fn (r NormalReporter) update_last_line(index int, message string) {
+	print('\r${testing.empty}\r${message}')
+	flush_stdout()
+}
+
+pub fn (r NormalReporter) update_last_line_and_move_to_next(index int, message string) {
+	// the last \n is needed, so SKIP/FAIL messages
+	// will not get overwritten by the OK ones
+	eprint('\r${testing.empty}\r${message}\n')
+}
+
+pub fn (r NormalReporter) message(index int, message string) {
+	eprintln(message)
+}
+
+pub fn (r NormalReporter) divider() {
+	eprintln(term.h_divider('-'))
+}
+
+//
+
+pub fn (r NormalReporter) worker_threads_start(files []string, mut ts TestSession) {
+	// eprintln('> ${@METHOD}')
+}
+
+pub fn (r NormalReporter) worker_threads_finish(mut ts TestSession) {
+	// eprintln('> ${@METHOD}')
+}
+
+pub fn (r NormalReporter) list_of_failed_commands(failed_cmds []string) {
+	for i, cmd in failed_cmds {
+		eprintln(term.failed('Failed command ${i + 1}:') + '    ${cmd}')
+	}
+}