adding bats file

hw2/task2/tests/output.bats

@@ -0,0 +1,41 @@
+#!/usr/bin/env bats
+
+
+@test "task2: Check that we have a debug output" {
+    run stat "$BATS_TEST_DIRNAME/../target/debug/task2"
+    [ "$status" -eq 0 ]
+}
+
+@test "task2: Output Long String: The quick ...." {
+    run "$BATS_TEST_DIRNAME/../target/debug/task2" 'q' '♥ The quick brown fox jumps over the lazy dog. ♥'
+    [[ "${lines[0]}" =~ "You asked me to count all 'q' in '♥ The quick brown fox jumps over the lazy dog. ♥'" ]]
+    [[ "${lines[1]}" =~ "Found 1 'q' in '♥ The quick brown fox jumps over the lazy dog. ♥'" ]]
+}
+
+@test "task2: Output Short String: ababab " {
+   run "$BATS_TEST_DIRNAME/../target/debug/task2" 'a' 'ababab'
+   [[ "${lines[0]}" =~ "You asked me to count all 'a' in 'ababab'" ]]
+   [[ "${lines[1]}" =~ "Found 3 'a' in 'ababab'" ]]
+}
+
+@test "task2: Output Error 1" {
+   run "$BATS_TEST_DIRNAME/../target/debug/task2"
+   [[ "${lines[0]}" =~ "not enough arguments" ]]
+}
+
+@test "task2: Output Error 2" {
+   run "$BATS_TEST_DIRNAME/../target/debug/task2"
+   [[ "${lines[0]}" =~ "not enough arguments" ]]
+}
+
+# wc output with white spaces is trimmed by xargs
+@test "task2: Output must be exact 2 line long" {
+    run bash -c "'$BATS_TEST_DIRNAME/../target/debug/task2' 'a' 'b' 'c' | wc -l | xargs"
+    [ "$output" = "2" ]
+}
+
+# wc output with white spaces is trimmed by xargs
+@test "task2: Output must be exact 1 line long" {
+    run bash -c "'$BATS_TEST_DIRNAME/../target/debug/task2' 'a'  | wc -l | xargs"
+    [ "$output" = "1" ]
+}