After commit c018f5fd29 Fenrir is being switched over to go. If you do not want to be part of the testing process, please switch to master.

internal/prompt/detector_test.go

@@ -0,0 +1,113 @@
+// Copyright (c) 2026 Storm Dragon
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package prompt
+
+import (
+	"testing"
+
+	"git.stormux.org/storm/fenrir/internal/screen"
+)
+
+func snapshot(lines ...string) screen.Snapshot {
+	result := screen.Snapshot{Terminal: 1, Active: true, Rows: len(lines), Cols: 100, Y: len(lines) - 1}
+	for _, line := range lines {
+		cells := make([]rune, result.Cols)
+		for index := range cells {
+			cells[index] = ' '
+		}
+		copy(cells, []rune(line))
+		result.Cells = append(result.Cells, cells...)
+	}
+	return result
+}
+
+func TestRecognizesFreshPromptsAndCompletion(t *testing.T) {
+	for _, line := range []string{
+		"$", "#", ">", "bash-5.3$", "[Username@Host ~/code] $", "Username@Host:~$",
+		"Proceed? [Y/n]", "Continue? (Yes/No)", "Is this ok [y/N]:", ":: Proceed? [Y/n]",
+		"Password:", "[sudo] password for Username:", "Username's password:",
+		"Please enter passphrase for key:", "Press any key to continue...", "Are you sure? [yes/no]",
+		"Please confirm:", "CUSTOM READY", "Device 42 ready:",
+		"Worked for 3m 35s • 8:05 PM", "Worked for 19s • 7:46 PM", "Worked for 1h 2m 3s • 12:00 AM",
+	} {
+		t.Run(line, func(t *testing.T) {
+			detector, err := New([]string{"CUSTOM READY"}, []string{`^Device [0-9]+ ready:$`})
+			if err != nil {
+				t.Fatal(err)
+			}
+			if got := detector.Observe(snapshot("working")); got != "" {
+				t.Fatal(got)
+			}
+			if got := detector.Observe(snapshot("  " + line)); got != line {
+				t.Fatal(got)
+			}
+			if got := detector.Observe(snapshot("  " + line)); got != "" {
+				t.Fatal("stale line restored", got)
+			}
+		})
+	}
+}
+
+func TestRejectsFalseAndIncompletePrompts(t *testing.T) {
+	for _, line := range []string{
+		"Price is $", "C# language", "Downloading 20%", "$ echo hello", "Password: secret",
+		"Please enter passphrase: secret", "Worked for 19s", "Worked for 19s • 7:4",
+		"Worked for 19s • 17:46 PM", "Worked for 19s • 7:99 PM", "Worked for 19s • 7:46 PM more",
+		"quoted Worked for 19s • 7:46 PM", "Worked for 3m nonsense • 8:05 PM",
+	} {
+		t.Run(line, func(t *testing.T) {
+			detector, _ := New(nil, nil)
+			detector.Observe(snapshot("working"))
+			if got := detector.Observe(snapshot(line)); got != "" {
+				t.Fatal(got)
+			}
+		})
+	}
+}
+
+func TestSplitCompletionAboveCursorAndOldScroll(t *testing.T) {
+	detector, _ := New(nil, nil)
+	detector.Observe(snapshot("old", "working", "input"))
+	if got := detector.Observe(snapshot("old", "Worked for 19s • 7:4", "input")); got != "" {
+		t.Fatal(got)
+	}
+	line := "Worked for 19s • 7:46 PM"
+	if got := detector.Observe(snapshot("old", line, "input")); got != line {
+		t.Fatal(got)
+	}
+	if got := detector.Observe(snapshot(line, "input", "still working")); got != "" {
+		t.Fatal("scrolled history restored", got)
+	}
+	// A shell prompt elsewhere on the screen is not the active prompt.
+	if got := detector.Observe(snapshot(line, "$", "still working")); got != "" {
+		t.Fatal(got)
+	}
+}
+
+func TestSessionChangesOnlyEstablishBaseline(t *testing.T) {
+	for _, mode := range []string{"terminal", "generation", "resize", "inactive"} {
+		t.Run(mode, func(t *testing.T) {
+			detector, _ := New(nil, nil)
+			detector.Observe(snapshot("working"))
+			next := snapshot("$")
+			switch mode {
+			case "terminal":
+				next.Terminal++
+			case "generation":
+				next.Generation++
+			case "resize":
+				next = snapshot("", "$")
+			case "inactive":
+				next.Active = false
+			}
+			if got := detector.Observe(next); got != "" {
+				t.Fatal(got)
+			}
+			next.Active = true
+			if got := detector.Observe(next); got != "" {
+				t.Fatal(got)
+			}
+		})
+	}
+}