Enable strict coverage for step module

recipe_modules/step/tests/stdio.expected/basic.json

Index: recipe_modules/step/tests/stdio.expected/basic.json
diff --git a/recipe_modules/step/tests/stdio.expected/basic.json b/recipe_modules/step/tests/stdio.expected/basic.json
new file mode 100644
index 0000000000000000000000000000000000000000..4590bd7fe4aefbc601453cdd624226259684bdba
--- /dev/null
+++ b/recipe_modules/step/tests/stdio.expected/basic.json
@@ -0,0 +1,32 @@
+[
+  {
+    "cmd": [
+      "echo",
+      "Hello World"
+    ],
+    "name": "echo",
+    "stderr": "/path/to/tmp/",
+    "stdout": "/path/to/tmp/"
+  },
+  {
+    "cmd": [
+      "cat"
+    ],
+    "name": "cat",
+    "stdin": "hello",
+    "stdout": "/path/to/tmp/out"
+  },
+  {
+    "cmd": [
+      "echo",
+      "huh"
+    ],
+    "name": "automock",
+    "stdout": "/path/to/tmp/out"
+  },
+  {
+    "name": "$result",
+    "recipe_result": null,
+    "status_code": 0
+  }
+]