Exercise mycp a basic GNU cp clone

exercises/mycp/test_mycp.sh

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+#!/bin/sh
+
+EXEC=./mycp
+LOGFILE=test_results.log
+PASS=0
+FAIL=0
+
+echo "[INFO] Running tests for $EXEC" > "$LOGFILE"
+echo "[INFO] Date: $(date)" >> "$LOGFILE"
+echo "===================================" >> "$LOGFILE"
+
+log() {
+    echo "$1" | tee -a "$LOGFILE"
+}
+
+check() {
+    DESC="$1"
+    CMD="$2"
+    EXPECT="$3"
+
+    log "[TEST] $DESC"
+    eval "$CMD" > /dev/null 2>&1
+    RET=$?
+
+    if [ "$RET" -eq "$EXPECT" ]; then
+        log "  ✔ SUCCESS (exit code $RET)"
+        PASS=$((PASS + 1))
+    else
+        log "  ✘ FAIL (exit code $RET, expected $EXPECT)"
+        FAIL=$((FAIL + 1))
+    fi
+}
+
+compare_files() {
+    FILE1="$1"
+    FILE2="$2"
+    if cmp -s "$FILE1" "$FILE2"; then
+        log "  ✔ Files are identical"
+    else
+        log "  ✘ Files differ!"
+        FAIL=$((FAIL + 1))
+    fi
+}
+
+# Test 1
+echo "Hello World" > test_input.txt
+check "Copy text file" "$EXEC test_input.txt test_output.txt" 0
+compare_files test_input.txt test_output.txt
+
+# Test 2
+cp /bin/ls bin_input
+check "Copy binary file" "$EXEC bin_input bin_output" 0
+compare_files bin_input bin_output
+
+# Test 3
+check "Source file does not exist" "$EXEC nofile.txt shouldnotexist" 1
+
+# Test 4
+check "Missing arguments" "$EXEC" 1
+
+# Test 5
+echo "readonly" > readonly.txt
+chmod 444 readonly.txt
+check "Write to read-only file" "$EXEC test_input.txt readonly.txt" 1
+chmod 644 readonly.txt
+
+# Test 6
+echo "old content" > existing.txt
+check "Overwrite existing file" "$EXEC test_input.txt existing.txt" 0
+compare_files test_input.txt existing.txt
+
+# Test 7
+dd if=/dev/urandom of=bigfile bs=1K count=128 status=none
+check "Copy large file (128KB)" "$EXEC bigfile bigfile_copy" 0
+compare_files bigfile bigfile_copy
+
+# Summary
+log ""
+log "Tests passed: $PASS"
+log "Tests failed: $FAIL"
+
+if [ "$FAIL" -eq 0 ]; then
+    log "✅ All tests passed"
+    exit 0
+else
+    log "❌ Some tests failed"
+    exit 1
+fi
+