docs: add blog/2025-06-01-release-0-20

Author: Chemaclass

docs/blog/2025-06-01-release-0-20.md

@@ -0,0 +1,102 @@
+---
+date: '2025-06-01'
+title: 'Release 0.20'
+description: 'New spy assertions, subshell support, argument interpolation in test names, Windows parallel test execution, and performance improvements across the board.'
+coverUrl: '/imgs/2025-06-01/interpolation-data-provider.png'
+coverAlt: 'Data provider with interpolate args'
+
+aside: false
+---
+
+# {{ $frontmatter.title }}
+
+<time>{{ $formatDate($frontmatter.date) }}</time>
+
+## 🐛  Bugfix
+
+### Test doubles used in subshells
+
+Assertions on spies now work even when the call happens inside a subshell.
+
+::: code-group
+```bash [Example]
+function test_spy_in_subshell() {
+  spy date
+
+  (
+    date
+  )
+
+  assert_have_been_called date
+}
+```
+:::
+
+## 🔧 New features
+
+### Interpolating arguments in test names
+
+Data providers can now interpolate their arguments directly into the test name. Combine it with the new `@` prefix to improve readability.
+
+::: code-group
+```bash [example_test.sh]
+# @data_provider fizz_numbers
+function test_returns_fizz_when_multiple_of_::1::_like_::2::_given() {
+  # ...
+}
+
+function fizz_numbers() {
+  echo 3 4
+  echo 3 6
+}
+```
+```[Output]
+Running example_test.sh
+✓ Passed: Returns fizz when multiple of '3' like '4' given
+✓ Passed: Returns fizz when multiple of '3' like '6' given
+```
+:::
+
+### New assertions for test doubles
+
+You can ensure that a spy was **not** executed using `assert_not_called` and check arguments for specific invocations with an optional index in `assert_have_been_called_with`.
+
+::: code-group
+```bash [Example]
+function test_success() {
+  spy ps
+
+  ps foo
+  ps bar
+
+  assert_have_been_called_with "foo" ps 1
+  assert_have_been_called_with "bar" ps 2
+  assert_not_called ls
+}
+```
+:::
+
+### Snapshot comparison ignoring colors
+
+`assert_match_snapshot_ignore_colors` allows validating colored output without caring about ANSI codes.
+
+::: code-group
+```bash [Example]
+function test_success() {
+  assert_match_snapshot_ignore_colors "$(printf '\e[31mHello\e[0m World!')"
+}
+```
+:::
+
+### Parallel tests on Windows
+
+Parallel execution is now enabled on Windows, greatly reducing running time for large suites.
+
+## 🌾 Miscellaneous
+
+* Deprecate `# data_provider` in favor of `# @data_provider`
+* Improve `find_total_tests` and `runner::parse_result_sync` performance
+
+---
+
+See the full changelog in <a href="https://github.com/TypedDevs/bashunit/blob/main/CHANGELOG.md">GitHub</a>