test(numbers.txt): Test script that compares output with 'sort'

Test case that matches output of the program and 'sort' using the
command 'sort -n -k 2'

1 files changed, 25 insertions, 0 deletions

diff --git a/test/test.sh b/test/test.sh
new file mode 100755
index 0000000..ec9d65c
--- /dev/null
+++ b/test/test.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+TEST_INPUT="numbers.txt"
+
+SORTER="./sorter"
+REF="sort -n -k 2"
+
+SORTER_OUT="sorter_out.txt"
+REF_OUT="ref_output.txt"
+DIFF_FILE="diff.txt"
+
+$SORTER "$TEST_INPUT" > "$SORTER_OUT"
+$REF "$TEST_INPUT" > "$REF_OUT"
+
+# Compare outputs
+if diff -q "$SORTER_OUT" "$REF_OUT" > /dev/null; then
+    echo "Passed: $TEST_INPUT"
+else
+    echo "Failed: $TEST_INPUT"
+    echo "Differences:"
+    diff -u "$SORTER_OUT" "$REF_OUT" > "$DIFF_FILE"
+    diff -u "$SORTER_OUT" "$REF_OUT" | head -n 20
+    echo
+fi
+