bug(#632): wrong-test-order lint

src/main/resources/org/eolang/lints/tests/wrong-test-order.xsl

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+ * SPDX-License-Identifier: MIT
+-->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="wrong-test-order" version="2.0">
+  <xsl:import href="/org/eolang/parser/_funcs.xsl"/>
+  <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
+  <xsl:import href="/org/eolang/funcs/defect-context.xsl"/>
+  <xsl:output encoding="UTF-8" method="xml"/>
+  <xsl:template match="/">
+    <defects>
+      <xsl:for-each select="/object//o[starts-with(@name, '+')]">
+        <xsl:variable name="next" select="following-sibling::*[1]"/>
+        <xsl:if test="$next[self::o] and not(starts-with($next/@name, '+'))">
+          <xsl:element name="defect">
+            <xsl:variable name="line" select="eo:lineno(@line)"/>
+            <xsl:attribute name="line">
+              <xsl:value-of select="$line"/>
+            </xsl:attribute>
+            <xsl:if test="$line = '0'">
+              <xsl:attribute name="context">
+                <xsl:value-of select="eo:defect-context(.)"/>
+              </xsl:attribute>
+            </xsl:if>
+            <xsl:attribute name="severity">
+              <xsl:text>warning</xsl:text>
+            </xsl:attribute>
+            <xsl:text>The unit test wrongly ordered: </xsl:text>
+            <xsl:value-of select="eo:escape(eo:escape-plus(@name))"/>
+          </xsl:element>
+        </xsl:if>
+      </xsl:for-each>
+    </defects>
+  </xsl:template>
+</xsl:stylesheet>

src/main/resources/org/eolang/motives/tests/wrong-test-order.md

@@ -0,0 +1,19 @@
+# Wrong test order
+
+Unit tests must be located after live objects:
+
+Incorrect:
+
+```eo
+[] > foo
+  [] +> runs-something
+  [] > bar
+```
+
+Correct:
+
+```eo
+[] > foo
+  [] > bar
+  [] +> runs-something
+```

src/test/resources/org/eolang/lints/packs/single/wrong-test-order/allows-correct-order.yaml

@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/tests/wrong-test-order.xsl
+asserts:
+  - /defects[count(defect[@severity='warning'])=1]
+  - /defects/defect[@line='3']
+input: |
+  [] > foo
+    [] > bar
+    [] +> runs-program
+    [] > boom

src/test/resources/org/eolang/lints/packs/single/wrong-test-order/allows-no-tests.yaml

@@ -0,0 +1,12 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/tests/wrong-test-order.xsl
+asserts:
+  - /defects[count(defect[@severity='warning'])=0]
+input: |
+  [] > foo
+    [] > a
+    [] > x
+    [] > y

src/test/resources/org/eolang/lints/packs/single/wrong-test-order/allows-single-test.yaml

@@ -0,0 +1,10 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/tests/wrong-test-order.xsl
+asserts:
+  - /defects[count(defect[@severity='warning'])=0]
+input: |
+  [] > main
+    [] +> testing

src/test/resources/org/eolang/lints/packs/single/wrong-test-order/allows-tests-only.yaml

@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/tests/wrong-test-order.xsl
+asserts:
+  - /defects[count(defect[@severity='warning'])=0]
+input: |
+  [] > at
+    [] +> test
+    [] +> another-test

src/test/resources/org/eolang/lints/packs/single/wrong-test-order/catches-mixed.yaml

@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/tests/wrong-test-order.xsl
+asserts:
+  - /defects[count(defect[@severity='warning'])=1]
+  - /defects/defect[@line='2']
+input: |
+  [] > app
+    [] +> runs
+    [] > x
+    [] +> something

src/test/resources/org/eolang/lints/packs/single/wrong-test-order/catches-test-first.yaml

@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/tests/wrong-test-order.xsl
+asserts:
+  - /defects[count(defect[@severity='warning'])=1]
+  - /defects/defect[@line='2']
+input: |
+  [] > x
+    [] +> runs-x
+    [] > bool
+    [] > t

src/test/resources/org/eolang/lints/packs/single/wrong-test-order/catches-wrong-order.yaml

@@ -0,0 +1,12 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/tests/wrong-test-order.xsl
+asserts:
+  - /defects[count(defect[@severity='warning'])=0]
+input: |
+  [] > main
+    [] > bar
+    [] > boom
+    [] > test