other test file

bats/student_tests.sh

+#!/usr/bin/env bats
+
+# File: student_tests.sh
+# 
+# A simple unit test suite for our shell
+
+@test "Example: check ls runs without errors" {
+    run ./dsh <<EOF
+ls
+exit
+EOF
+    # Assert that the shell exited with status 0.
+    [ "$status" -eq 0 ]
+}
+
+@test "Echo preserves quoted spaces" {
+    run ./dsh <<EOF
+echo "hello,      world"
+exit
+EOF
+    [ "$status" -eq 0 ]
+    # Check that the exact quoted string (with extra spaces) appears in the output.
+    [[ "$output" =~ "hello,      world" ]]
+}
+
+@test "Built-in cd changes directory" {
+    # This test uses 'pwd' to capture the current directory, then changes directory.
+    # It assumes that moving to the parent directory changes the pwd output.
+    run ./dsh <<EOF
+pwd
+cd ..
+pwd
+exit
+EOF
+    [ "$status" -eq 0 ]
+    # Extract directory outputs.
+    # Depending on your prompt, the actual pwd lines might not be on fixed lines.
+    # Here we assume the first and third non-empty output lines are from pwd.
+    dir1=$(echo "$output" | sed '/^$/d' | sed -n '1p')
+    dir2=$(echo "$output" | sed '/^$/d' | sed -n '3p')
+    [ "$dir1" != "$dir2" ]
+}
+
+@test "Empty input prints warning" {
+    run ./dsh <<EOF
+
+exit
+EOF
+    [ "$status" -eq 0 ]
+    # Assume that a warning message contains the word "warning".
+    [[ "$output" =~ warning ]]
+}