enhance(apis): add tests for retrieving tags by name with case insensitivity and filtering

clj-e2e/test/logseq/e2e/plugins_basic_test.clj

@@ -363,3 +363,44 @@
             tag1 (ls-api-call! :editor.getTag id1)]
         (is (= (get tag1 ":logseq.property.class/extends") [id2 id3]) "tag1 extends tag2,tag3 with db ids"))
       )))
+
+(deftest get-tags-by-name-test
+  (testing "get tags by exact name"
+    (let [tag-name "product"
+          tag1 (ls-api-call! :editor.createTag tag-name)
+          result (ls-api-call! :editor.getTagsByName tag-name)]
+      (is (= 1 (count result)) "should return exactly one tag")
+      (is (= (get tag1 "uuid") (get (first result) "uuid")) "should return the created tag")
+      (is (= (get tag1 "title") (get (first result) "title")) "tag title should match")))
+
+  (testing "get tags by name is case-insensitive"
+    (let [tag-name "TestTag123"
+          _ (ls-api-call! :editor.createTag tag-name)
+          result-lower (ls-api-call! :editor.getTagsByName "testtag123")
+          result-upper (ls-api-call! :editor.getTagsByName "TESTTAG123")
+          result-mixed (ls-api-call! :editor.getTagsByName "TeStTaG123")]
+      (is (= 1 (count result-lower)) "should find tag with lowercase search")
+      (is (= 1 (count result-upper)) "should find tag with uppercase search")
+      (is (= 1 (count result-mixed)) "should find tag with mixed case search")
+      (is (= (get (first result-lower) "uuid") (get (first result-upper) "uuid")) "all searches should return same tag")
+      (is (= (get (first result-lower) "uuid") (get (first result-mixed) "uuid")) "all searches should return same tag")))
+
+  (testing "get tags by name returns empty array for non-existent tag"
+    (let [result (ls-api-call! :editor.getTagsByName "NonExistentTag12345")]
+      (is (empty? result) "should return empty array for non-existent tag")))
+
+  (testing "get tags by name filters out non-tag pages"
+    (let [page-name "regular-page"
+          _ (page/new-page page-name)
+          result (ls-api-call! :editor.getTagsByName page-name)]
+      (is (empty? result) "should not return regular pages, only tags")))
+
+  (testing "get tags by name with multiple tags having similar names"
+    (let [tag1 (ls-api-call! :editor.createTag "category")
+          tag2 (ls-api-call! :editor.createTag "Category")
+          result (ls-api-call! :editor.getTagsByName "category")]
+      ;; Due to case-insensitive name normalization, both tags should be the same
+      (is (>= (count result) 1) "should return at least one tag")
+      ;; Verify the result contains valid tag structure
+      (is (string? (get (first result) "uuid")) "returned tag should have uuid")
+      (is (string? (get (first result) "title")) "returned tag should have title"))))