support for elixir exunit tests

queries/elixir/aerial.scm

@@ -57,3 +57,18 @@
     target: (identifier) @identifier (#eq? @identifier "defstruct")) @type
   (#set! "kind" "Function")
   ) @start
+
+; describe("Unit test")
+(call
+  target: (identifier) @identifier (#any-of? @identifier "describe" "test")
+  (arguments [(string (quoted_content) @name)])
+  (#set! "kind" "Function")
+  ) @type
+
+; describe("Unit test")
+(do_block
+  (call
+    target: (identifier) @identifier @name (#eq? @identifier "setup")) @type
+  (#set! "kind" "Function")
+  ) @type
+

tests/treesitter/elixir_spec.lua

@@ -175,6 +175,55 @@ describe("treesitter elixir", function()
           },
         },
       },
+      {
+        kind = "Module",
+        name = "StringTest",
+        level = 0,
+        lnum = 43,
+        col = 0,
+        end_lnum = 59,
+        end_col = 3,
+        children = {
+          {
+            kind = "Function",
+            name = "String.capitalize/1",
+            level = 1,
+            lnum = 46,
+            col = 2,
+            end_lnum = 58,
+            end_col = 5,
+            children = {
+              {
+                kind = "Function",
+                name = "setup",
+                level = 2,
+                lnum = 47,
+                col = 4,
+                end_lnum = 49,
+                end_col = 7,
+              },
+              {
+                kind = "Function",
+                name = "first grapheme is in uppercase",
+                level = 2,
+                lnum = 51,
+                col = 4,
+                end_lnum = 53,
+                end_col = 7,
+              },
+              {
+                kind = "Function",
+                name = "converts remaining graphemes to lowercase",
+                level = 2,
+                lnum = 55,
+                col = 4,
+                end_lnum = 57,
+                end_col = 7,
+              },
+            },
+          },
+        },
+      },
     })
   end)
 end)

tests/treesitter/elixir_test.exs

@@ -38,3 +38,22 @@ defimpl Example.Protocol, for: Map do
     true
   end
 end
+
+# https://hexdocs.pm/ex_unit/ExUnit.Case.html#describe/2-examples
+defmodule StringTest do
+  use ExUnit.Case, async: true
+
+  describe "String.capitalize/1" do
+    setup do
+      # setup code
+    end
+
+    test "first grapheme is in uppercase" do
+      assert String.capitalize("hello") == "Hello"
+    end
+
+    test "converts remaining graphemes to lowercase" do
+      assert String.capitalize("HELLO") == "Hello"
+    end
+  end
+end