[#165] Add tests for local references

Problem: We want all cases of local references to be covered by bats tests
(e.g. cause we want to be sure that all this works well on Windows),
but there was only one case covered in `check-anchors`

Solution: make a `check-local-refs` folder and test different
types of links  with different roots

tests/golden/check-local-refs/check-local-refs.bats

@@ -0,0 +1,23 @@
+#!/usr/bin/env bats
+
+# SPDX-FileCopyrightText: 2022 Serokell <https://serokell.io>
+#
+# SPDX-License-Identifier: MPL-2.0
+
+load '../helpers/bats-support/load'
+load '../helpers/bats-assert/load'
+load '../helpers/bats-file/load'
+load '../helpers'
+
+
+@test "Checking local references, root = \".\"" {
+  to_temp xrefcheck
+
+  assert_diff expected1.gold
+}
+
+@test "Checking local references, root = \"dir1\"" {
+  to_temp xrefcheck -r dir1
+
+  assert_diff expected2.gold
+}

tests/golden/check-anchors/no-anchor.md → tests/golden/check-local-refs/dir1/d1f1.md

@@ -4,4 +4,4 @@
  - SPDX-License-Identifier: MPL-2.0
  -->
 
- # File with no anchors
+# Existing anchor d1f1

tests/golden/check-local-refs/dir1/dir2/d2f1.md

@@ -0,0 +1,35 @@
+<!--
+ - SPDX-FileCopyrightText: 2022 Serokell <https://serokell.io>
+ -
+ - SPDX-License-Identifier: MPL-2.0
+ -->
+
+# Current file links
+[existing-cf-ref](#current-file-links)
+[bad-cf-ref](#bad)
+
+# Relative links
+[existing-file-rel](d2f2.md)
+[existing-file-rel](./d2f2.md)
+[existing-file-rel](../dir2/.././d1f1.md)
+
+
+[existing-anchor-rel-1](d2f2.md#existing-anchor-d2f2)
+[existing-anchor-rel-2](./d2f2.md#existing-anchor-d2f2)
+[existing-anchor-rel-3](../dir2/../d1f1.md#existing-anchor-d1f1)
+
+[bad-file-rel](../a/b/c/unexisting-file.md)
+
+[bad-anchor-rel-1](d2f2.md#bad-anchor)
+[bad-anchor-rel-2](unexisting-file.md#bad-anchor)
+
+# Absolute links
+Should be correct when root is `/tests/golden/check-local-refs`:
+[file-abs-1](/dir1/./d1f1.md)
+[anchor-abs-1](/dir1/.././d1f1.md#existing-anchor-d1f1)
+[anchor-abs-2](/dir1/dir2/../../dir1/./dir2/d2f2.md#existing-anchor-d2f2)
+Should be correct when root is `/tests/golden/check-local-refs/dir1`:
+[file-abs-2](/d1f1.md)
+[file-abs-3](/dir2/d2f2.md)
+[file-abs-4](/./dir2/../d1f1.md)
+[anchor-abs-3](/./dir2/../d1f1.md#existing-anchor-d1f1)

tests/golden/check-anchors/check-relative-anchor.md → tests/golden/check-local-refs/dir1/dir2/d2f2.md

@@ -4,4 +4,4 @@
  - SPDX-License-Identifier: MPL-2.0
  -->
 
-[no-anchor](no-anchor.md#invalid-anchor)
+# Existing anchor d2f2

tests/golden/check-local-refs/expected1.gold

@@ -0,0 +1,91 @@
+=== Invalid references found ===
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (current file) at src:9:1-18:
+       - text: "bad-cf-ref"
+       - link:
+       - anchor: bad
+
+     ⛀  Anchor 'bad' is not present
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (relative) at src:21:1-43:
+       - text: "bad-file-rel"
+       - link: ../a/b/c/unexisting-file.md
+       - anchor: -
+
+     ⛀  File does not exist:
+        dir1/dir2/../a/b/c/unexisting-file.md
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (relative) at src:23:1-38:
+       - text: "bad-anchor-rel-1"
+       - link: d2f2.md
+       - anchor: bad-anchor
+
+     ⛀  Anchor 'bad-anchor' is not present
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (relative) at src:24:1-49:
+       - text: "bad-anchor-rel-2"
+       - link: unexisting-file.md
+       - anchor: bad-anchor
+
+     ⛀  File does not exist:
+        dir1/dir2/unexisting-file.md
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (absolute) at src:29:1-55:
+       - text: "anchor-abs-1"
+       - link: /dir1/.././d1f1.md
+       - anchor: existing-anchor-d1f1
+
+     ⛀  File does not exist:
+        ./dir1/.././d1f1.md
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (absolute) at src:32:1-22:
+       - text: "file-abs-2"
+       - link: /d1f1.md
+       - anchor: -
+
+     ⛀  File does not exist:
+        ./d1f1.md
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (absolute) at src:33:1-27:
+       - text: "file-abs-3"
+       - link: /dir2/d2f2.md
+       - anchor: -
+
+     ⛀  File does not exist:
+        ./dir2/d2f2.md
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (absolute) at src:34:1-32:
+       - text: "file-abs-4"
+       - link: /./dir2/../d1f1.md
+       - anchor: -
+
+     ⛀  File does not exist:
+        ././dir2/../d1f1.md
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (absolute) at src:35:1-55:
+       - text: "anchor-abs-3"
+       - link: /./dir2/../d1f1.md
+       - anchor: existing-anchor-d1f1
+
+     ⛀  File does not exist:
+        ././dir2/../d1f1.md
+
+
+Invalid references dumped, 9 in total.

tests/golden/check-local-refs/expected2.gold

@@ -0,0 +1,71 @@
+=== Invalid references found ===
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (current file) at src:9:1-18:
+       - text: "bad-cf-ref"
+       - link:
+       - anchor: bad
+
+     ⛀  Anchor 'bad' is not present
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (relative) at src:21:1-43:
+       - text: "bad-file-rel"
+       - link: ../a/b/c/unexisting-file.md
+       - anchor: -
+
+     ⛀  File does not exist:
+        dir1/dir2/../a/b/c/unexisting-file.md
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (relative) at src:23:1-38:
+       - text: "bad-anchor-rel-1"
+       - link: d2f2.md
+       - anchor: bad-anchor
+
+     ⛀  Anchor 'bad-anchor' is not present
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (relative) at src:24:1-49:
+       - text: "bad-anchor-rel-2"
+       - link: unexisting-file.md
+       - anchor: bad-anchor
+
+     ⛀  File does not exist:
+        dir1/dir2/unexisting-file.md
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (absolute) at src:28:1-29:
+       - text: "file-abs-1"
+       - link: /dir1/./d1f1.md
+       - anchor: -
+
+     ⛀  File does not exist:
+        dir1/dir1/./d1f1.md
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (absolute) at src:29:1-55:
+       - text: "anchor-abs-1"
+       - link: /dir1/.././d1f1.md
+       - anchor: existing-anchor-d1f1
+
+     ⛀  File does not exist:
+        dir1/dir1/.././d1f1.md
+
+
+  ➥  In file dir1/dir2/d2f1.md
+     bad reference (absolute) at src:30:1-73:
+       - text: "anchor-abs-2"
+       - link: /dir1/dir2/../../dir1/./dir2/d2f2.md
+       - anchor: existing-anchor-d2f2
+
+     ⛀  File does not exist:
+        dir1/dir1/dir2/../../dir1/./dir2/d2f2.md
+
+
+Invalid references dumped, 7 in total.