[variable-length-quantity] Add a Jinja test template

exercises/practice/variable-length-quantity/.meta/template.j2

@@ -0,0 +1,35 @@
+{{ header }}
+
+#
+# *** Input and Output numbers are expressed in hexadecimal.
+#
+
+{% for idx, case in cases %}
+@test "{{ case["description"] }}" {
+    {% if idx == 0 %}# {% endif %}[[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    {%- set hex_input = [] %}
+    {%- for num in case["input"]["integers"] %}
+        {%- set _ = hex_input.append('%02X' % num) %}
+    {%- endfor %}
+    run bash {{ solution }} {{ case["property"] }} {{ hex_input | join(" ") }}
+{%- if case["expect_error"] %}
+    assert_failure
+    {#- The error message from the canonical data is not used. #}
+    assert_output --partial "incomplete byte sequence"
+{%- else %}
+    {%- set hex_output = [] %}
+    {%- for num in case["expected"] %}
+        {%- set _ = hex_output.append('%02X' % num) %}
+    {%- endfor %}
+    assert_success
+    assert_output "{{ hex_output | join(" ") }}"
+{%- endif %}
+}
+{% endfor %}
+
+@test "invalid subcommand" {
+    [[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    run bash variable_length_quantity.sh hello 80
+    assert_failure
+    assert_output --partial "unknown subcommand"
+}

exercises/practice/variable-length-quantity/variable_length_quantity.bats

@@ -1,15 +1,15 @@
 #!/usr/bin/env bats
 load bats-extra
 
+# generated on 2026-06-29T19:27:37+00:00
+
 #
 # *** Input and Output numbers are expressed in hexadecimal.
 #
 
 
-# Encode a series of integers, producing a series of bytes.
-
 @test "zero" {
-    #[[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    # [[ $BATS_RUN_SKIPPED == "true" ]] || skip
     run bash variable_length_quantity.sh encode 00
     assert_success
     assert_output "00"
@@ -26,7 +26,7 @@ load bats-extra
     [[ $BATS_RUN_SKIPPED == "true" ]] || skip
     run bash variable_length_quantity.sh encode 53
     assert_success
-    assert_output 53
+    assert_output "53"
 }
 
 @test "largest single byte" {
@@ -169,9 +169,6 @@ load bats-extra
     assert_output "C0 00 C8 E8 56 FF FF FF 7F 00 FF 7F 81 80 00"
 }
 
-
-# Decode a series of bytes, producing a series of integers.
-
 @test "one byte" {
     [[ $BATS_RUN_SKIPPED == "true" ]] || skip
     run bash variable_length_quantity.sh decode 7F
@@ -207,16 +204,6 @@ load bats-extra
     assert_output "FFFFFFFF"
 }
 
-@test "multiple values" {
-    [[ $BATS_RUN_SKIPPED == "true" ]] || skip
-    run bash variable_length_quantity.sh decode C0 00 C8 E8 56 FF FF FF 7F 00 FF 7F 81 80 00
-    assert_success
-    assert_output "2000 123456 FFFFFFF 00 3FFF 4000"
-}
-
-
-# Some error conditions
-
 @test "incomplete sequence causes error" {
     [[ $BATS_RUN_SKIPPED == "true" ]] || skip
     run bash variable_length_quantity.sh decode FF
@@ -231,6 +218,14 @@ load bats-extra
     assert_output --partial "incomplete byte sequence"
 }
 
+@test "multiple values" {
+    [[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    run bash variable_length_quantity.sh decode C0 00 C8 E8 56 FF FF FF 7F 00 FF 7F 81 80 00
+    assert_success
+    assert_output "2000 123456 FFFFFFF 00 3FFF 4000"
+}
+
+
 @test "invalid subcommand" {
     [[ $BATS_RUN_SKIPPED == "true" ]] || skip
     run bash variable_length_quantity.sh hello 80